1:59 a.m.
Hi,
I was just wondering, within the whole complexity of hosted-engine.
Would it be possible for the hosted-engine ha-agent control the mount
point?
I'm basing this off a few people I've been talking to who have their
NFS server running on the same host that the hosted-engine servers are
running. Most normally also running that on top of gluster.
The main motive for this, is currently if the nfs server is running on
the localhost and the server goes for a clean shutdown it will hang
because the nfs mount is hard mounted and as the nfs server has gone
away, we're stuck at an infinite hold waiting for it to cleanly
unmount (which it never will)
If it's possible for instead one of the ha components to unmount this
nfs mount when it shuts down, this could potentially prevent this.
There are other alternatives and I know this is not the "supported"
scenario, but just hoping to bounce a few ideas.
Thanks,
Andrew
7:13 a.m.
----- Original Message -----
From: "Andrew Lau" <andrew(a)andrewklau.com>
To: "users" <users(a)ovirt.org>
Sent: Saturday, May 24, 2014 9:59:26 AM
Subject: [ovirt-users] Can HA Agent control NFS Mount?
Hi,
I was just wondering, within the whole complexity of hosted-engine.
Would it be possible for the hosted-engine ha-agent control the mount
point?
I'm basing this off a few people I've been talking to who have their
NFS server running on the same host that the hosted-engine servers are
running. Most normally also running that on top of gluster.
The main motive for this, is currently if the nfs server is running on
the localhost and the server goes for a clean shutdown it will hang
because the nfs mount is hard mounted and as the nfs server has gone
away, we're stuck at an infinite hold waiting for it to cleanly
unmount (which it never will)
If it's possible for instead one of the ha components to unmount this
nfs mount when it shuts down, this could potentially prevent this.
There are other alternatives and I know this is not the "supported"
scenario, but just hoping to bounce a few ideas.
Thanks,
Andrew
Hi Andrew,
Indeed we're not looking into the Gluster flow now as it has some
known issues. Additionally (just to make it clear) local nfs will
not provide any tolerance if the hosting server dies. So we should
be looking at a shared storage regardless of the hypervisors.
12:38 p.m.
Just for the record, what Andrew reports is not specific to GlusterFS.
I have not yet found a way to shut down my single-node Hosted deployment
cleanly without experiencing NFS hangs/timeouts on the way down.
My NFS storage is local to my host.
Also curious is that when I say "poweroff" it actually reboots and comes
up again. Could that be due to the timeouts on the way down?
-Bob
On 05/25/2014 08:13 AM, Doron Fediuck wrote:
----- Original Message -----
> From: "Andrew Lau" <andrew(a)andrewklau.com>
> To: "users" <users(a)ovirt.org>
> Sent: Saturday, May 24, 2014 9:59:26 AM
> Subject: [ovirt-users] Can HA Agent control NFS Mount?
>
> Hi,
>
> I was just wondering, within the whole complexity of hosted-engine.
> Would it be possible for the hosted-engine ha-agent control the mount
> point?
>
> I'm basing this off a few people I've been talking to who have their
> NFS server running on the same host that the hosted-engine servers are
> running. Most normally also running that on top of gluster.
>
> The main motive for this, is currently if the nfs server is running on
> the localhost and the server goes for a clean shutdown it will hang
> because the nfs mount is hard mounted and as the nfs server has gone
> away, we're stuck at an infinite hold waiting for it to cleanly
> unmount (which it never will)
>
> If it's possible for instead one of the ha components to unmount this
> nfs mount when it shuts down, this could potentially prevent this.
> There are other alternatives and I know this is not the "supported"
> scenario, but just hoping to bounce a few ideas.
>
> Thanks,
> Andrew
Hi Andrew,
Indeed we're not looking into the Gluster flow now as it has some
known issues. Additionally (just to make it clear) local nfs will
not provide any tolerance if the hosting server dies. So we should
be looking at a shared storage regardless of the hypervisors.
_______________________________________________
Users mailing list
Users(a)ovirt.org
http://lists.ovirt.org/mailman/listinfo/users
1:51 p.m.
On 25-5-2014 19:38, Bob Doolittle wrote:
Also curious is that when I say "poweroff" it actually reboots and
comes up again. Could that be due to the timeouts on the way down?
Ah, that's something my F19 host does too. Some more info: if engine
hasn't been started on the host then I can shutdown it and it will
poweroff. IF engine has been run on it then it will reboot.
Its not vdsm (I think) because my shutdown sequence is (on my f19 host):
service ovirt-agent-ha stop
service ovirt-agent-broker stop
service vdsmd stop
ssh root@engine01 "init 0"
init 0
I don't use maintenance mode because when I poweron my host (= my
desktop) I want engine to power on automatically which it does most of
the time within 10 min.
I think wdmd or sanlock are causing the reboot instead of poweroff
Joop
2:10 p.m.
On 05/25/2014 02:51 PM, Joop wrote:
On 25-5-2014 19:38, Bob Doolittle wrote:
>
> Also curious is that when I say "poweroff" it actually reboots and
> comes up again. Could that be due to the timeouts on the way down?
>
Ah, that's something my F19 host does too. Some more info: if engine
hasn't been started on the host then I can shutdown it and it will
poweroff. IF engine has been run on it then it will reboot.
Its not vdsm (I think) because my shutdown sequence is (on my f19 host):
service ovirt-agent-ha stop
service ovirt-agent-broker stop
service vdsmd stop
ssh root@engine01 "init 0"
init 0
I don't use maintenance mode because when I poweron my host (= my
desktop) I want engine to power on automatically which it does most of
the time within 10 min.
For comparison, I see this issue and I *do* use maintenance mode
(because presumably that's the 'blessed' way to shut things down and I'm
scared to mess this complex system up by straying off the beaten path
;). My process is:
ssh root@engine "init 0"
(wait for "vdsClient -s 0 list | grep Status:" to show the vm as down)
hosted-engine --set-maintenance --mode=global
poweroff
And then on startup:
hosted-engine --set-maintenance --mode=none
hosted-engine --vm-start
There are two issues here. I am not sure if they are related or not.
1. The NFS timeout during shutdown (Joop do you see this also? Or just #2?)
2. The system reboot instead of poweroff (which messes up remote machine
management)
Thanks,
Bob
I think wdmd or sanlock are causing the reboot instead of poweroff
Joop
_______________________________________________
Users mailing list
Users(a)ovirt.org
http://lists.ovirt.org/mailman/listinfo/users
11:30 p.m.
On Mon, May 26, 2014 at 5:10 AM, Bob Doolittle <bob(a)doolittle.us.com> wrote:
On 05/25/2014 02:51 PM, Joop wrote:
>
> On 25-5-2014 19:38, Bob Doolittle wrote:
>>
>>
>> Also curious is that when I say "poweroff" it actually reboots and
comes
>> up again. Could that be due to the timeouts on the way down?
>>
> Ah, that's something my F19 host does too. Some more info: if engine
> hasn't been started on the host then I can shutdown it and it will poweroff.
> IF engine has been run on it then it will reboot.
> Its not vdsm (I think) because my shutdown sequence is (on my f19 host):
> service ovirt-agent-ha stop
> service ovirt-agent-broker stop
> service vdsmd stop
> ssh root@engine01 "init 0"
> init 0
>
> I don't use maintenance mode because when I poweron my host (= my desktop)
> I want engine to power on automatically which it does most of the time
> within 10 min.
For comparison, I see this issue and I *do* use maintenance mode (because
presumably that's the 'blessed' way to shut things down and I'm scared
to
mess this complex system up by straying off the beaten path ;). My process
is:
ssh root@engine "init 0"
(wait for "vdsClient -s 0 list | grep Status:" to show the vm as down)
hosted-engine --set-maintenance --mode=global
poweroff
And then on startup:
hosted-engine --set-maintenance --mode=none
hosted-engine --vm-start
There are two issues here. I am not sure if they are related or not.
1. The NFS timeout during shutdown (Joop do you see this also? Or just #2?)
2. The system reboot instead of poweroff (which messes up remote machine
management)
For 1. I was wondering if perhaps, we could have an option to specify
the mount options. If I understand correctly, applying a soft mount
instead of a hard mount would prevent this from happening. I'm however
not sure of the implications this would have on the data integrity..
I would really like to see it happen in the ha-agent, as it's the one
which connects/mounts the storage it should also unmount it on boot.
However the stability on it, is flaky at best. I've noticed if `df`
hangs because of another NFS mount having timed-out the agent will
die. That's not a good sign.. this was what actually caused my
hosted-engine to run twice in one case.
Thanks,
Bob
> I think wdmd or sanlock are causing the reboot instead of poweroff
>
> Joop
>
> _______________________________________________
> Users mailing list
> Users(a)ovirt.org
> http://lists.ovirt.org/mailman/listinfo/users
_______________________________________________
Users mailing list
Users(a)ovirt.org
http://lists.ovirt.org/mailman/listinfo/users
1:38 a.m.
----- Original Message -----
From: "Andrew Lau" <andrew(a)andrewklau.com>
To: "Bob Doolittle" <bob(a)doolittle.us.com>
Cc: "users" <users(a)ovirt.org>
Sent: Monday, May 26, 2014 7:30:41 AM
Subject: Re: [ovirt-users] Can HA Agent control NFS Mount?
On Mon, May 26, 2014 at 5:10 AM, Bob Doolittle <bob(a)doolittle.us.com> wrote:
>
> On 05/25/2014 02:51 PM, Joop wrote:
>>
>> On 25-5-2014 19:38, Bob Doolittle wrote:
>>>
>>>
>>> Also curious is that when I say "poweroff" it actually reboots and
comes
>>> up again. Could that be due to the timeouts on the way down?
>>>
>> Ah, that's something my F19 host does too. Some more info: if engine
>> hasn't been started on the host then I can shutdown it and it will
>> poweroff.
>> IF engine has been run on it then it will reboot.
>> Its not vdsm (I think) because my shutdown sequence is (on my f19 host):
>> service ovirt-agent-ha stop
>> service ovirt-agent-broker stop
>> service vdsmd stop
>> ssh root@engine01 "init 0"
>> init 0
>>
>> I don't use maintenance mode because when I poweron my host (= my desktop)
>> I want engine to power on automatically which it does most of the time
>> within 10 min.
>
>
> For comparison, I see this issue and I *do* use maintenance mode (because
> presumably that's the 'blessed' way to shut things down and I'm
scared to
> mess this complex system up by straying off the beaten path ;). My process
> is:
>
> ssh root@engine "init 0"
> (wait for "vdsClient -s 0 list | grep Status:" to show the vm as down)
> hosted-engine --set-maintenance --mode=global
> poweroff
>
> And then on startup:
> hosted-engine --set-maintenance --mode=none
> hosted-engine --vm-start
>
> There are two issues here. I am not sure if they are related or not.
> 1. The NFS timeout during shutdown (Joop do you see this also? Or just #2?)
> 2. The system reboot instead of poweroff (which messes up remote machine
> management)
>
For 1. I was wondering if perhaps, we could have an option to specify
the mount options. If I understand correctly, applying a soft mount
instead of a hard mount would prevent this from happening. I'm however
not sure of the implications this would have on the data integrity..
I would really like to see it happen in the ha-agent, as it's the one
which connects/mounts the storage it should also unmount it on boot.
However the stability on it, is flaky at best. I've noticed if `df`
hangs because of another NFS mount having timed-out the agent will
die. That's not a good sign.. this was what actually caused my
hosted-engine to run twice in one case.
> Thanks,
> Bob
>
>
>> I think wdmd or sanlock are causing the reboot instead of poweroff
>>
>> Joop
>>
Great to have your feedback guys!
So just to clarify some of the issues you mentioned;
Hosted engine wasn't designed for a 'single node' use case, as we do
want it to be highly available. This is why it's being restarted
elsewhere or even on the same server if no better alternative.
Having said that, it is possible to set global maintenance mode
as a first step (in the UI: right click engine vm and choose ha-maintenance).
Then you can ssh into the engine vm and init 0.
After a short while, the qemu process should gracefully end and release
its sanlock lease as well as any other resource, which means you can
reboot your hypervisor peacefully.
Doron
1:43 a.m.
Yesterday evening I have found the service responsible for the reboot
instead of the powerdown. If I do: service wdmd stop the server will
reboot. It seems the watchdog is hung up and eventually this will lead
to a crash and thus a reboot instead of the shutdown.
Anyone knows how to debug this?
Joop
12:36 p.m.
Joop,
On 05/26/2014 02:43 AM, Joop wrote:
Yesterday evening I have found the service responsible for the reboot
instead of the powerdown. If I do: service wdmd stop the server will
reboot. It seems the watchdog is hung up and eventually this will lead
to a crash and thus a reboot instead of the shutdown.
Anyone knows how to debug this?
Did you get anywhere with this?
Pretty nasty. Is there a bug open?
We're getting a timeout on an NFS mount during the powerdown
(single-node hosted, after global maintenance enabled and engine powered
off), and that makes the machine reboot and try to come back up again
instead of powering off.
So two issues:
- What is the mount that is hanging (probably an oVirt issue)?
- Why does the system reboot instead of powering down as instructed (?)?
-Bob
Joop
_______________________________________________
Users mailing list
Users(a)ovirt.org
http://lists.ovirt.org/mailman/listinfo/users
3:06 p.m.
Bob Doolittle wrote:
Joop,
On 05/26/2014 02:43 AM, Joop wrote:
> Yesterday evening I have found the service responsible for the reboot
> instead of the powerdown. If I do: service wdmd stop the server will
> reboot. It seems the watchdog is hung up and eventually this will
> lead to a crash and thus a reboot instead of the shutdown.
>
> Anyone knows how to debug this?
Did you get anywhere with this?
Pretty nasty. Is there a bug open?
We're getting a timeout on an NFS mount during the powerdown
(single-node hosted, after global maintenance enabled and engine
powered off), and that makes the machine reboot and try to come back
up again instead of powering off.
So two issues:
- What is the mount that is hanging (probably an oVirt issue)?
Don´t know what that
problem is. I have a local nfs mount but don´t
experience that problem
- Why does the system reboot instead of powering down as instructed
(?)?
the reboot is caused by wdmd. Docs says that if the watchdogs aren´t
responding that a reset will follow. So our init 0 is overruled because
of the hanging watchdog. Why it is hanging I don´t know. Could be my
chipset, could be the version of wdmd-kernel. Only thing is I know it
didn´t happen always in the past but that is as much as I remember, sorry.
Joop
2:05 a.m.
On Sat, May 31, 2014 at 6:06 AM, Joop <jvdwege(a)xs4all.nl> wrote:
Bob Doolittle wrote:
>
> Joop,
>
> On 05/26/2014 02:43 AM, Joop wrote:
>>
>> Yesterday evening I have found the service responsible for the reboot
>> instead of the powerdown. If I do: service wdmd stop the server will reboot.
>> It seems the watchdog is hung up and eventually this will lead to a crash
>> and thus a reboot instead of the shutdown.
>>
>> Anyone knows how to debug this?
>
>
> Did you get anywhere with this?
> Pretty nasty. Is there a bug open?
>
> We're getting a timeout on an NFS mount during the powerdown (single-node
> hosted, after global maintenance enabled and engine powered off), and that
> makes the machine reboot and try to come back up again instead of powering
> off.
>
> So two issues:
> - What is the mount that is hanging (probably an oVirt issue)?
Don´t know what that problem is. I have a local nfs mount but don´t
experience that problem
I got to the console when mine went for a reboot. I see sanlock and
wdmd failing to shutdown properly which would explain why it doesn't
unmount properly.
> - Why does the system reboot instead of powering down as instructed (?)?
>
the reboot is caused by wdmd. Docs says that if the watchdogs aren´t
responding that a reset will follow. So our init 0 is overruled because of
the hanging watchdog. Why it is hanging I don´t know. Could be my chipset,
could be the version of wdmd-kernel. Only thing is I know it didn´t happen
always in the past but that is as much as I remember, sorry.
Joop
_______________________________________________
Users mailing list
Users(a)ovirt.org
http://lists.ovirt.org/mailman/listinfo/users
10:12 a.m.
On 05/26/2014 02:38 AM, Doron Fediuck wrote:
Great to have your feedback guys!
So just to clarify some of the issues you mentioned;
Hosted engine wasn't designed for a 'single node' use case, as we do
want it to be highly available. This is why it's being restarted
elsewhere or even on the same server if no better alternative.
I hope you will keep this configuration in your design space as you move
forward.
As you can see it is likely to be a popular one. At a previous employer,
everybody in our development group had a single (powerful) machine
running VMware vSphere, with a hosted vCenter, to use as a development
VM testbed.
It's likely to be popular for people with few resources who want to run
in a fully supported configuration.
HA is great, but not every environment has the resources/requirement to
support it. oVirt has a lot to offer even a leaner environment and I
hope those environments continue to get attention as the product
matures. For example, I hope there is a reasonable story around upgrades
to future releases for single-node hosted configurations.
Having said that, it is possible to set global maintenance mode
as a first step (in the UI: right click engine vm and choose ha-maintenance).
Then you can ssh into the engine vm and init 0.
What is the recipe for a clean startup after shutdown?
Can we do 'hosted-engine --vm-start' while the system is in Global
Maintenance mode?
Thanks,
Bob
2:37 a.m.
----- Original Message -----
From: "Bob Doolittle" <bob(a)doolittle.us.com>
To: "Doron Fediuck" <dfediuck(a)redhat.com>, "Andrew Lau"
<andrew(a)andrewklau.com>
Cc: "users" <users(a)ovirt.org>, "Jiri Moskovcak"
<jmoskovc(a)redhat.com>, "Sandro Bonazzola" <sbonazzo(a)redhat.com>
Sent: Monday, May 26, 2014 6:12:04 PM
Subject: Re: [ovirt-users] Can HA Agent control NFS Mount?
On 05/26/2014 02:38 AM, Doron Fediuck wrote:
> Great to have your feedback guys!
>
> So just to clarify some of the issues you mentioned;
>
> Hosted engine wasn't designed for a 'single node' use case, as we do
> want it to be highly available. This is why it's being restarted
> elsewhere or even on the same server if no better alternative.
I hope you will keep this configuration in your design space as you move
forward.
As you can see it is likely to be a popular one. At a previous employer,
everybody in our development group had a single (powerful) machine
running VMware vSphere, with a hosted vCenter, to use as a development
VM testbed.
It's likely to be popular for people with few resources who want to run
in a fully supported configuration.
HA is great, but not every environment has the resources/requirement to
support it. oVirt has a lot to offer even a leaner environment and I
hope those environments continue to get attention as the product
matures. For example, I hope there is a reasonable story around upgrades
to future releases for single-node hosted configurations.
> Having said that, it is possible to set global maintenance mode
> as a first step (in the UI: right click engine vm and choose
> ha-maintenance).
> Then you can ssh into the engine vm and init 0.
What is the recipe for a clean startup after shutdown?
Can we do 'hosted-engine --vm-start' while the system is in Global
Maintenance mode?
Thanks,
Bob
Hi Bob,
If all you need is a way to run VMs, then Kimchi[1] from the oVirt
eco-system can be a better solution, as it's designed for a single-node
use case. If you wish to run ovirt in a vm you can run a VM with Kimchi
and install the engine inside. Also, coming on 3.5 is the ovirt appliance[2]
which will simplify it.
If I'm missing something please share your thoughts.
As for clean start after maintenance, I'd expect "hosted-engine
--set-maintenance=none"
will allow the agent to start the VM automatically. If this is not the
case please let us know.
Thanks,
Doron
[1] https://github.com/kimchi-project/kimchi/wiki
[2] http://www.ovirt.org/Feature/oVirtAppliance
2:44 a.m.
Well I don't think Kimchi is a solution
to the problem Bob mentioned.
What you want (and what you get at Vmware btw)
is _one_ solution to start on a single node (laptop or server, whatever)
and which is able to scale to manage 100 Hosts or a complete data
center.
I doubt kimchi can do this.
oVirt could be tweaked to do this.
Other thoughts?
Am 27.05.2014 09:37, schrieb Doron Fediuck:
If I'm missing something please share your thoughts.
--
Mit freundlichen Grüßen / Regards
Sven Kieske
Systemadministrator
Mittwald CM Service GmbH & Co. KG
Königsberger Straße 6
32339 Espelkamp
T: +49-5772-293-100
F: +49-5772-293-333
https://www.mittwald.de
Geschäftsführer: Robert Meyer
St.Nr.: 331/5721/1033, USt-IdNr.: DE814773217, HRA 6640, AG Bad Oeynhausen
Komplementärin: Robert Meyer Verwaltungs GmbH, HRB 13260, AG Bad Oeynhausen
4:02 a.m.
----- Original Message -----
From: "Sven Kieske" <S.Kieske(a)mittwald.de>
To: users(a)ovirt.org
Sent: Tuesday, May 27, 2014 10:44:39 AM
Subject: Re: [ovirt-users] Can HA Agent control NFS Mount?
Well I don't think Kimchi is a solution
to the problem Bob mentioned.
What you want (and what you get at Vmware btw)
is _one_ solution to start on a single node (laptop or server, whatever)
and which is able to scale to manage 100 Hosts or a complete data
center.
I doubt kimchi can do this.
oVirt could be tweaked to do this.
Other thoughts?
Am 27.05.2014 09:37, schrieb Doron Fediuck:
> If I'm missing something please share your thoughts.
--
Mit freundlichen Grüßen / Regards
Sven Kieske
Systemadministrator
Mittwald CM Service GmbH & Co. KG
Königsberger Straße 6
32339 Espelkamp
T: +49-5772-293-100
F: +49-5772-293-333
https://www.mittwald.de
Geschäftsführer: Robert Meyer
St.Nr.: 331/5721/1033, USt-IdNr.: DE814773217, HRA 6640, AG Bad Oeynhausen
Komplementärin: Robert Meyer Verwaltungs GmbH, HRB 13260, AG Bad Oeynhausen
Hi Sven,
Referring to Bob's mail, he mentioned people with little resources, and also
a development use case- "running VMware vSphere, with a hosted vCenter, to use
as a development VM testbed."
These are valid cases for Kimchi, where all you want to do is simply run a VM.
If you want to be able scale up to 100 hosts or more, you can definitely start
with 2 hosts, which is the hosted engine use case. The reason why I mention it,
is that additional hosts will require proper network and storage configuration,
which basically mean you want to plan ahead even when you begin with a modest
deployment of 2 hosts.
I do not think a single-host use case is technically impossible, but we need
to understand a VM may die, and in a single host setup this may have additional
implications. So why get into troubles instead of planning your way or using
the right tool for the task. Just imagine using a 5.4 Kg hammer to hang a picture
frame on the wall.
Doron
4:44 a.m.
So now I have to ask, what is the purpose of ovirt-all-in-one?
Just for tech demos at events?
I can live with any solution, but I feel it will limit ovirts adoption
and the use-cases should get better documented.
There are still many beginners asking very basic questions on this ML
and I think this shows the lack of a better documentation for the first
steps to take for a working ovirt environment.
Or what do you think?
Am 27.05.2014 11:02, schrieb Doron Fediuck:
I do not think a single-host use case is technically impossible, but
we need
to understand a VM may die, and in a single host setup this may have additional
implications. So why get into troubles instead of planning your way or using
the right tool for the task. Just imagine using a 5.4 Kg hammer to hang a picture
frame on the wall.
--
Mit freundlichen Grüßen / Regards
Sven Kieske
Systemadministrator
Mittwald CM Service GmbH & Co. KG
Königsberger Straße 6
32339 Espelkamp
T: +49-5772-293-100
F: +49-5772-293-333
https://www.mittwald.de
Geschäftsführer: Robert Meyer
St.Nr.: 331/5721/1033, USt-IdNr.: DE814773217, HRA 6640, AG Bad Oeynhausen
Komplementärin: Robert Meyer Verwaltungs GmbH, HRB 13260, AG Bad Oeynhausen
7:47 a.m.
----- Original Message -----
From: "Sven Kieske" <S.Kieske(a)mittwald.de>
To: "Doron Fediuck" <dfediuck(a)redhat.com>
Cc: users(a)ovirt.org
Sent: Tuesday, May 27, 2014 12:44:23 PM
Subject: Re: [ovirt-users] Can HA Agent control NFS Mount?
So now I have to ask, what is the purpose of ovirt-all-in-one?
Just for tech demos at events?
I can live with any solution, but I feel it will limit ovirts adoption
and the use-cases should get better documented.
There are still many beginners asking very basic questions on this ML
and I think this shows the lack of a better documentation for the first
steps to take for a working ovirt environment.
Or what do you think?
Am 27.05.2014 11:02, schrieb Doron Fediuck:
> I do not think a single-host use case is technically impossible, but we
> need
> to understand a VM may die, and in a single host setup this may have
> additional
> implications. So why get into troubles instead of planning your way or
> using
> the right tool for the task. Just imagine using a 5.4 Kg hammer to hang a
> picture
> frame on the wall.
--
Mit freundlichen Grüßen / Regards
Sven Kieske
Systemadministrator
Mittwald CM Service GmbH & Co. KG
Königsberger Straße 6
32339 Espelkamp
T: +49-5772-293-100
F: +49-5772-293-333
https://www.mittwald.de
Geschäftsführer: Robert Meyer
St.Nr.: 331/5721/1033, USt-IdNr.: DE814773217, HRA 6640, AG Bad Oeynhausen
Komplementärin: Robert Meyer Verwaltungs GmbH, HRB 13260, AG Bad Oeynhausen
Hi Sven,
All-in-one is classic-style installation (ie- not running in a vm), and indeed
was created for demo's. However it indeed may grow to support additional hosts
in a different DC, as the one it starts with is for local storage. This is why
I was saying that the issue is not technical but requires some understanding
of the admin to where he wants to go.
As for documentation, that's always an issue. Keeping docs updated is an on going
task and we'd appreciate any assistance we get for it.
Doron
6:52 a.m.
On 05/27/2014 03:47 PM, Doron Fediuck wrote:
----- Original Message -----
> From: "Sven Kieske" <S.Kieske(a)mittwald.de>
> To: "Doron Fediuck" <dfediuck(a)redhat.com>
> Cc: users(a)ovirt.org
> Sent: Tuesday, May 27, 2014 12:44:23 PM
> Subject: Re: [ovirt-users] Can HA Agent control NFS Mount?
>
> So now I have to ask, what is the purpose of ovirt-all-in-one?
>
> Just for tech demos at events?
>
> I can live with any solution, but I feel it will limit ovirts adoption
> and the use-cases should get better documented.
>
> There are still many beginners asking very basic questions on this ML
> and I think this shows the lack of a better documentation for the first
> steps to take for a working ovirt environment.
>
> Or what do you think?
>
> Am 27.05.2014 11:02, schrieb Doron Fediuck:
>> I do not think a single-host use case is technically impossible, but we
>> need
>> to understand a VM may die, and in a single host setup this may have
>> additional
>> implications. So why get into troubles instead of planning your way or
>> using
>> the right tool for the task. Just imagine using a 5.4 Kg hammer to hang a
>> picture
>> frame on the wall.
>
> --
> Mit freundlichen Grüßen / Regards
>
> Sven Kieske
>
> Systemadministrator
> Mittwald CM Service GmbH & Co. KG
> Königsberger Straße 6
> 32339 Espelkamp
> T: +49-5772-293-100
> F: +49-5772-293-333
> https://www.mittwald.de
> Geschäftsführer: Robert Meyer
> St.Nr.: 331/5721/1033, USt-IdNr.: DE814773217, HRA 6640, AG Bad Oeynhausen
> Komplementärin: Robert Meyer Verwaltungs GmbH, HRB 13260, AG Bad Oeynhausen
Hi Sven,
All-in-one is classic-style installation (ie- not running in a vm), and indeed
was created for demo's. However it indeed may grow to support additional hosts
in a different DC, as the one it starts with is for local storage. This is why
I was saying that the issue is not technical but requires some understanding
of the admin to where he wants to go.
As for documentation, that's always an issue. Keeping docs updated is an on going
task and we'd appreciate any assistance we get for it.
Sven - so assuming we want to reduce the number of configurations we
want to support, instead of all-in-one which was our previous solutions
for POCs/Demos, what would look different for hosted-engine on a single
host? just not have the "ha" feature?
4:12 a.m.
I suppose a hosted-engine solution without HA
would suffice the use case of just having one system to host and manage
vms, with the ability to extend this system to many more.
Am 03.06.2014 13:52, schrieb Itamar Heim:
what would look different for hosted-engine on a single host? just
not
have the "ha" feature?
--
Mit freundlichen Grüßen / Regards
Sven Kieske
Systemadministrator
Mittwald CM Service GmbH & Co. KG
Königsberger Straße 6
32339 Espelkamp
T: +49-5772-293-100
F: +49-5772-293-333
https://www.mittwald.de
Geschäftsführer: Robert Meyer
St.Nr.: 331/5721/1033, USt-IdNr.: DE814773217, HRA 6640, AG Bad Oeynhausen
Komplementärin: Robert Meyer Verwaltungs GmbH, HRB 13260, AG Bad Oeynhausen
7:16 a.m.
Would that help the issue being reported in this thread at all? This thread
was about issues with clean shutdown of a single node hosted environment,
which result in hangs/timeouts and the inability to issue poweroff without
it resulting in a reboot.
There have been no suggestions about how to resolve those issues, which
seem related to sanlock leases not being cleanly released.
-Bob
On Jun 13, 2014 5:14 AM, "Sven Kieske" <S.Kieske(a)mittwald.de> wrote:
I suppose a hosted-engine solution without HA
would suffice the use case of just having one system to host and manage
vms, with the ability to extend this system to many more.
Am 03.06.2014 13:52, schrieb Itamar Heim:
> what would look different for hosted-engine on a single host? just not
> have the "ha" feature?
--
Mit freundlichen Grüßen / Regards
Sven Kieske
Systemadministrator
Mittwald CM Service GmbH & Co. KG
Königsberger Straße 6
32339 Espelkamp
T: +49-5772-293-100
F: +49-5772-293-333
https://www.mittwald.de
Geschäftsführer: Robert Meyer
St.Nr.: 331/5721/1033, USt-IdNr.: DE814773217, HRA 6640, AG Bad Oeynhausen
Komplementärin: Robert Meyer Verwaltungs GmbH, HRB 13260, AG Bad Oeynhausen
_______________________________________________
Users mailing list
Users(a)ovirt.org
http://lists.ovirt.org/mailman/listinfo/users
7:28 a.m.
Bob,
the way to handle it is to switch to global maintenance,
and then ssh into the VM and shut it down.
After rebooting you should switch maintenance mode to off.
----- Original Message -----
From: "Bob Doolittle" <bob(a)doolittle.us.com>
To: "Sven Kieske" <S.Kieske(a)mittwald.de>
Cc: "users" <users(a)ovirt.org>, "Doron Fediuck"
<dfediuck(a)redhat.com>, "Itamar Heim" <iheim(a)redhat.com>
Sent: Friday, June 13, 2014 3:16:12 PM
Subject: Re: [ovirt-users] Can HA Agent control NFS Mount?
Would that help the issue being reported in this thread at all? This thread
was about issues with clean shutdown of a single node hosted environment,
which result in hangs/timeouts and the inability to issue poweroff without
it resulting in a reboot.
There have been no suggestions about how to resolve those issues, which
seem related to sanlock leases not being cleanly released.
-Bob
On Jun 13, 2014 5:14 AM, "Sven Kieske" <S.Kieske(a)mittwald.de> wrote:
> I suppose a hosted-engine solution without HA
> would suffice the use case of just having one system to host and manage
> vms, with the ability to extend this system to many more.
>
> Am 03.06.2014 13:52, schrieb Itamar Heim:
> > what would look different for hosted-engine on a single host? just not
> > have the "ha" feature?
>
> --
> Mit freundlichen Grüßen / Regards
>
> Sven Kieske
>
> Systemadministrator
> Mittwald CM Service GmbH & Co. KG
> Königsberger Straße 6
> 32339 Espelkamp
> T: +49-5772-293-100
> F: +49-5772-293-333
> https://www.mittwald.de
> Geschäftsführer: Robert Meyer
> St.Nr.: 331/5721/1033, USt-IdNr.: DE814773217, HRA 6640, AG Bad Oeynhausen
> Komplementärin: Robert Meyer Verwaltungs GmbH, HRB 13260, AG Bad Oeynhausen
> _______________________________________________
> Users mailing list
> Users(a)ovirt.org
> http://lists.ovirt.org/mailman/listinfo/users
>
8:30 a.m.
Doron,
This is my normal process but it does not resolve the issue.
A few of us who have experienced this have tried a number of things.
I see two hangs/wdmd timeouts during shutdown, so I think there are two
remaining lease holders.
I find if I stop vdsmd, ovirt-ha-agent, and ovirt-ha-broker services I
only experience the last hang (almost at the end, as it's shutting down
filesystems).
Any hang results in a wdmd timeout and consequently a reboot instead of
poweroff.
If I never bring engine up, things shut down cleanly.
I will try your suggestions in the other mail a bit later this morning.
-Bob
On 06/13/2014 08:28 AM, Doron Fediuck wrote:
Bob,
the way to handle it is to switch to global maintenance,
and then ssh into the VM and shut it down.
After rebooting you should switch maintenance mode to off.
----- Original Message -----
> From: "Bob Doolittle" <bob(a)doolittle.us.com>
> To: "Sven Kieske" <S.Kieske(a)mittwald.de>
> Cc: "users" <users(a)ovirt.org>, "Doron Fediuck"
<dfediuck(a)redhat.com>, "Itamar Heim" <iheim(a)redhat.com>
> Sent: Friday, June 13, 2014 3:16:12 PM
> Subject: Re: [ovirt-users] Can HA Agent control NFS Mount?
>
> Would that help the issue being reported in this thread at all? This thread
> was about issues with clean shutdown of a single node hosted environment,
> which result in hangs/timeouts and the inability to issue poweroff without
> it resulting in a reboot.
>
> There have been no suggestions about how to resolve those issues, which
> seem related to sanlock leases not being cleanly released.
>
> -Bob
> On Jun 13, 2014 5:14 AM, "Sven Kieske" <S.Kieske(a)mittwald.de> wrote:
>
>> I suppose a hosted-engine solution without HA
>> would suffice the use case of just having one system to host and manage
>> vms, with the ability to extend this system to many more.
>>
>> Am 03.06.2014 13:52, schrieb Itamar Heim:
>>> what would look different for hosted-engine on a single host? just not
>>> have the "ha" feature?
>> --
>> Mit freundlichen Grüßen / Regards
>>
>> Sven Kieske
>>
>> Systemadministrator
>> Mittwald CM Service GmbH & Co. KG
>> Königsberger Straße 6
>> 32339 Espelkamp
>> T: +49-5772-293-100
>> F: +49-5772-293-333
>> https://www.mittwald.de
>> Geschäftsführer: Robert Meyer
>> St.Nr.: 331/5721/1033, USt-IdNr.: DE814773217, HRA 6640, AG Bad Oeynhausen
>> Komplementärin: Robert Meyer Verwaltungs GmbH, HRB 13260, AG Bad Oeynhausen
>> _______________________________________________
>> Users mailing list
>> Users(a)ovirt.org
>> http://lists.ovirt.org/mailman/listinfo/users
>>
3:03 a.m.
Hi Doron,
Before the initial thread sways a little more..
On Mon, May 26, 2014 at 4:38 PM, Doron Fediuck <dfediuck(a)redhat.com> wrote:
----- Original Message -----
> From: "Andrew Lau" <andrew(a)andrewklau.com>
> To: "Bob Doolittle" <bob(a)doolittle.us.com>
> Cc: "users" <users(a)ovirt.org>
> Sent: Monday, May 26, 2014 7:30:41 AM
> Subject: Re: [ovirt-users] Can HA Agent control NFS Mount?
>
> On Mon, May 26, 2014 at 5:10 AM, Bob Doolittle <bob(a)doolittle.us.com> wrote:
> >
> > On 05/25/2014 02:51 PM, Joop wrote:
> >>
> >> On 25-5-2014 19:38, Bob Doolittle wrote:
> >>>
> >>>
> >>> Also curious is that when I say "poweroff" it actually reboots
and comes
> >>> up again. Could that be due to the timeouts on the way down?
> >>>
> >> Ah, that's something my F19 host does too. Some more info: if engine
> >> hasn't been started on the host then I can shutdown it and it will
> >> poweroff.
> >> IF engine has been run on it then it will reboot.
> >> Its not vdsm (I think) because my shutdown sequence is (on my f19 host):
> >> service ovirt-agent-ha stop
> >> service ovirt-agent-broker stop
> >> service vdsmd stop
> >> ssh root@engine01 "init 0"
> >> init 0
> >>
> >> I don't use maintenance mode because when I poweron my host (= my
desktop)
> >> I want engine to power on automatically which it does most of the time
> >> within 10 min.
> >
> >
> > For comparison, I see this issue and I *do* use maintenance mode (because
> > presumably that's the 'blessed' way to shut things down and I'm
scared to
> > mess this complex system up by straying off the beaten path ;). My process
> > is:
> >
> > ssh root@engine "init 0"
> > (wait for "vdsClient -s 0 list | grep Status:" to show the vm as
down)
> > hosted-engine --set-maintenance --mode=global
> > poweroff
> >
> > And then on startup:
> > hosted-engine --set-maintenance --mode=none
> > hosted-engine --vm-start
> >
> > There are two issues here. I am not sure if they are related or not.
> > 1. The NFS timeout during shutdown (Joop do you see this also? Or just #2?)
> > 2. The system reboot instead of poweroff (which messes up remote machine
> > management)
> >
>
> For 1. I was wondering if perhaps, we could have an option to specify
> the mount options. If I understand correctly, applying a soft mount
> instead of a hard mount would prevent this from happening. I'm however
> not sure of the implications this would have on the data integrity..
>
> I would really like to see it happen in the ha-agent, as it's the one
> which connects/mounts the storage it should also unmount it on boot.
> However the stability on it, is flaky at best. I've noticed if `df`
> hangs because of another NFS mount having timed-out the agent will
> die. That's not a good sign.. this was what actually caused my
> hosted-engine to run twice in one case.
>
> > Thanks,
> > Bob
> >
> >
> >> I think wdmd or sanlock are causing the reboot instead of poweroff
> >>
> >> Joop
> >>
Great to have your feedback guys!
So just to clarify some of the issues you mentioned;
Hosted engine wasn't designed for a 'single node' use case, as we do
want it to be highly available. This is why it's being restarted
elsewhere or even on the same server if no better alternative.
Having said that, it is possible to set global maintenance mode
as a first step (in the UI: right click engine vm and choose ha-maintenance).
Then you can ssh into the engine vm and init 0.
After a short while, the qemu process should gracefully end and release
its sanlock lease as well as any other resource, which means you can
reboot your hypervisor peacefully.
What about in a 2 host cluster. Lets say we want to take down 1 host
for maintenance, so 50% chance it could be running the engine. Would
setting maintenance-mode local do the same thing and allow a clean
shutdown/reboot?
Doron
4:07 a.m.
----- Original Message -----
From: "Andrew Lau" <andrew(a)andrewklau.com>
To: "Doron Fediuck" <dfediuck(a)redhat.com>
Cc: "Bob Doolittle" <bob(a)doolittle.us.com>, "users"
<users(a)ovirt.org>, "Jiri Moskovcak" <jmoskovc(a)redhat.com>,
"Sandro Bonazzola" <sbonazzo(a)redhat.com>
Sent: Wednesday, May 28, 2014 11:03:38 AM
Subject: Re: [ovirt-users] Can HA Agent control NFS Mount?
Hi Doron,
Before the initial thread sways a little more..
On Mon, May 26, 2014 at 4:38 PM, Doron Fediuck <dfediuck(a)redhat.com> wrote:
>
>
> ----- Original Message -----
>> From: "Andrew Lau" <andrew(a)andrewklau.com>
>> To: "Bob Doolittle" <bob(a)doolittle.us.com>
>> Cc: "users" <users(a)ovirt.org>
>> Sent: Monday, May 26, 2014 7:30:41 AM
>> Subject: Re: [ovirt-users] Can HA Agent control NFS Mount?
>>
>> On Mon, May 26, 2014 at 5:10 AM, Bob Doolittle <bob(a)doolittle.us.com>
>> wrote:
>> >
>> > On 05/25/2014 02:51 PM, Joop wrote:
>> >>
>> >> On 25-5-2014 19:38, Bob Doolittle wrote:
>> >>>
>> >>>
>> >>> Also curious is that when I say "poweroff" it actually
reboots and
>> >>> comes
>> >>> up again. Could that be due to the timeouts on the way down?
>> >>>
>> >> Ah, that's something my F19 host does too. Some more info: if
engine
>> >> hasn't been started on the host then I can shutdown it and it will
>> >> poweroff.
>> >> IF engine has been run on it then it will reboot.
>> >> Its not vdsm (I think) because my shutdown sequence is (on my f19
>> >> host):
>> >> service ovirt-agent-ha stop
>> >> service ovirt-agent-broker stop
>> >> service vdsmd stop
>> >> ssh root@engine01 "init 0"
>> >> init 0
>> >>
>> >> I don't use maintenance mode because when I poweron my host (= my
>> >> desktop)
>> >> I want engine to power on automatically which it does most of the time
>> >> within 10 min.
>> >
>> >
>> > For comparison, I see this issue and I *do* use maintenance mode
>> > (because
>> > presumably that's the 'blessed' way to shut things down and
I'm scared
>> > to
>> > mess this complex system up by straying off the beaten path ;). My
>> > process
>> > is:
>> >
>> > ssh root@engine "init 0"
>> > (wait for "vdsClient -s 0 list | grep Status:" to show the vm as
down)
>> > hosted-engine --set-maintenance --mode=global
>> > poweroff
>> >
>> > And then on startup:
>> > hosted-engine --set-maintenance --mode=none
>> > hosted-engine --vm-start
>> >
>> > There are two issues here. I am not sure if they are related or not.
>> > 1. The NFS timeout during shutdown (Joop do you see this also? Or just
>> > #2?)
>> > 2. The system reboot instead of poweroff (which messes up remote machine
>> > management)
>> >
>>
>> For 1. I was wondering if perhaps, we could have an option to specify
>> the mount options. If I understand correctly, applying a soft mount
>> instead of a hard mount would prevent this from happening. I'm however
>> not sure of the implications this would have on the data integrity..
>>
>> I would really like to see it happen in the ha-agent, as it's the one
>> which connects/mounts the storage it should also unmount it on boot.
>> However the stability on it, is flaky at best. I've noticed if `df`
>> hangs because of another NFS mount having timed-out the agent will
>> die. That's not a good sign.. this was what actually caused my
>> hosted-engine to run twice in one case.
>>
>> > Thanks,
>> > Bob
>> >
>> >
>> >> I think wdmd or sanlock are causing the reboot instead of poweroff
>> >>
>> >> Joop
>> >>
>
> Great to have your feedback guys!
>
> So just to clarify some of the issues you mentioned;
>
> Hosted engine wasn't designed for a 'single node' use case, as we do
> want it to be highly available. This is why it's being restarted
> elsewhere or even on the same server if no better alternative.
>
> Having said that, it is possible to set global maintenance mode
> as a first step (in the UI: right click engine vm and choose
> ha-maintenance).
> Then you can ssh into the engine vm and init 0.
>
> After a short while, the qemu process should gracefully end and release
> its sanlock lease as well as any other resource, which means you can
> reboot your hypervisor peacefully.
>
What about in a 2 host cluster. Lets say we want to take down 1 host
for maintenance, so 50% chance it could be running the engine. Would
setting maintenance-mode local do the same thing and allow a clean
shutdown/reboot?
Yes. That's the idea behind of local (aka host) maintenance[1].
Starting 3.4 all you need to do is move the host to maintenance in the UI
and this will also set the local maintenance mode for this host. So
you should be able to do everything with it, and use 'activate' in the
UI to get it into production.
[1] http://www.ovirt.org/Features/Self_Hosted_Engine#Maintenance_Flows
9:43 p.m.
Hi Doron,
On Mon, May 26, 2014 at 4:38 PM, Doron Fediuck <dfediuck(a)redhat.com> wrote:
----- Original Message -----
> From: "Andrew Lau" <andrew(a)andrewklau.com>
> To: "Bob Doolittle" <bob(a)doolittle.us.com>
> Cc: "users" <users(a)ovirt.org>
> Sent: Monday, May 26, 2014 7:30:41 AM
> Subject: Re: [ovirt-users] Can HA Agent control NFS Mount?
>
> On Mon, May 26, 2014 at 5:10 AM, Bob Doolittle <bob(a)doolittle.us.com> wrote:
> >
> > On 05/25/2014 02:51 PM, Joop wrote:
> >>
> >> On 25-5-2014 19:38, Bob Doolittle wrote:
> >>>
> >>>
> >>> Also curious is that when I say "poweroff" it actually reboots
and comes
> >>> up again. Could that be due to the timeouts on the way down?
> >>>
> >> Ah, that's something my F19 host does too. Some more info: if engine
> >> hasn't been started on the host then I can shutdown it and it will
> >> poweroff.
> >> IF engine has been run on it then it will reboot.
> >> Its not vdsm (I think) because my shutdown sequence is (on my f19 host):
> >> service ovirt-agent-ha stop
> >> service ovirt-agent-broker stop
> >> service vdsmd stop
> >> ssh root@engine01 "init 0"
> >> init 0
> >>
> >> I don't use maintenance mode because when I poweron my host (= my
desktop)
> >> I want engine to power on automatically which it does most of the time
> >> within 10 min.
> >
> >
> > For comparison, I see this issue and I *do* use maintenance mode (because
> > presumably that's the 'blessed' way to shut things down and I'm
scared to
> > mess this complex system up by straying off the beaten path ;). My process
> > is:
> >
> > ssh root@engine "init 0"
> > (wait for "vdsClient -s 0 list | grep Status:" to show the vm as
down)
> > hosted-engine --set-maintenance --mode=global
> > poweroff
> >
> > And then on startup:
> > hosted-engine --set-maintenance --mode=none
> > hosted-engine --vm-start
> >
> > There are two issues here. I am not sure if they are related or not.
> > 1. The NFS timeout during shutdown (Joop do you see this also? Or just #2?)
> > 2. The system reboot instead of poweroff (which messes up remote machine
> > management)
> >
>
> For 1. I was wondering if perhaps, we could have an option to specify
> the mount options. If I understand correctly, applying a soft mount
> instead of a hard mount would prevent this from happening. I'm however
> not sure of the implications this would have on the data integrity..
>
> I would really like to see it happen in the ha-agent, as it's the one
> which connects/mounts the storage it should also unmount it on boot.
> However the stability on it, is flaky at best. I've noticed if `df`
> hangs because of another NFS mount having timed-out the agent will
> die. That's not a good sign.. this was what actually caused my
> hosted-engine to run twice in one case.
>
> > Thanks,
> > Bob
> >
> >
> >> I think wdmd or sanlock are causing the reboot instead of poweroff
> >>
> >> Joop
> >>
Great to have your feedback guys!
So just to clarify some of the issues you mentioned;
Hosted engine wasn't designed for a 'single node' use case, as we do
want it to be highly available. This is why it's being restarted
elsewhere or even on the same server if no better alternative.
Having said that, it is possible to set global maintenance mode
as a first step (in the UI: right click engine vm and choose ha-maintenance).
Then you can ssh into the engine vm and init 0.
After a short while, the qemu process should gracefully end and release
its sanlock lease as well as any other resource, which means you can
reboot your hypervisor peacefully.
Sadly no, I've only been able to reboot my hypervisors if one of the
two conditions are met:
- Lazy unmount of /rhev/mnt/hosted-engine etc.
- killall -9 sanlock wdmd
I notice sanlock and wdmd are not able to be stopped with service wdmd
stop; service sanlock stop
These seem to fail during the shutdown/reboot process which prevents
the unmount and the graceful reboot.
Are there any logs I can look into on how to debug those failed shutdowns?
Doron
9:55 p.m.
On Mon, May 26, 2014 at 5:10 AM, Bob Doolittle <bob(a)doolittle.us.com> wrote:
On 05/25/2014 02:51 PM, Joop wrote:
>
> On 25-5-2014 19:38, Bob Doolittle wrote:
>>
>>
>> Also curious is that when I say "poweroff" it actually reboots and
comes
>> up again. Could that be due to the timeouts on the way down?
>>
> Ah, that's something my F19 host does too. Some more info: if engine
> hasn't been started on the host then I can shutdown it and it will poweroff.
> IF engine has been run on it then it will reboot.
> Its not vdsm (I think) because my shutdown sequence is (on my f19 host):
> service ovirt-agent-ha stop
> service ovirt-agent-broker stop
> service vdsmd stop
> ssh root@engine01 "init 0"
> init 0
>
> I don't use maintenance mode because when I poweron my host (= my desktop)
> I want engine to power on automatically which it does most of the time
> within 10 min.
For comparison, I see this issue and I *do* use maintenance mode (because
presumably that's the 'blessed' way to shut things down and I'm scared
to
mess this complex system up by straying off the beaten path ;). My process
is:
ssh root@engine "init 0"
(wait for "vdsClient -s 0 list | grep Status:" to show the vm as down)
hosted-engine --set-maintenance --mode=global
poweroff
And then on startup:
hosted-engine --set-maintenance --mode=none
hosted-engine --vm-start
There are two issues here. I am not sure if they are related or not.
1. The NFS timeout during shutdown (Joop do you see this also? Or just #2?)
2. The system reboot instead of poweroff (which messes up remote machine
management)
Thanks,
Bob
> I think wdmd or sanlock are causing the reboot instead of poweroff
While searching for my issue of wdmd/sanlock not shutting down, I
found this which may interest you both:
https://bugzilla.redhat.com/show_bug.cgi?id=888197
Specifically:
"To shut down sanlock without causing a wdmd reboot, you can run the
following command: "sanlock client shutdown -f 1"
This will cause sanlock to kill any pid's that are holding leases,
release those leases, and then exit.
"
>
> Joop
>
> _______________________________________________
> Users mailing list
> Users(a)ovirt.org
> http://lists.ovirt.org/mailman/listinfo/users
_______________________________________________
Users mailing list
Users(a)ovirt.org
http://lists.ovirt.org/mailman/listinfo/users
10:09 p.m.
Thanks Andrew, I'll try this workaround tomorrow for sure. But reading
though that bug report (closed not a bug) it states that the problem should
only arise if something is not releasing a sanlock lease. So if we've
entered Global Maintenance and shut down Engine, the question is what's
holding the lease?
How can that be debugged?
-Bob
On Jun 5, 2014 10:56 PM, "Andrew Lau" <andrew(a)andrewklau.com> wrote:
On Mon, May 26, 2014 at 5:10 AM, Bob Doolittle
<bob(a)doolittle.us.com>
wrote:
>
> On 05/25/2014 02:51 PM, Joop wrote:
>>
>> On 25-5-2014 19:38, Bob Doolittle wrote:
>>>
>>>
>>> Also curious is that when I say "poweroff" it actually reboots
and
comes
>>> up again. Could that be due to the timeouts on the way down?
>>>
>> Ah, that's something my F19 host does too. Some more info: if engine
>> hasn't been started on the host then I can shutdown it and it will
poweroff.
>> IF engine has been run on it then it will reboot.
>> Its not vdsm (I think) because my shutdown sequence is (on my f19 host):
>> service ovirt-agent-ha stop
>> service ovirt-agent-broker stop
>> service vdsmd stop
>> ssh root@engine01 "init 0"
>> init 0
>>
>> I don't use maintenance mode because when I poweron my host (= my
desktop)
>> I want engine to power on automatically which it does most of the time
>> within 10 min.
>
>
> For comparison, I see this issue and I *do* use maintenance mode (because
> presumably that's the 'blessed' way to shut things down and I'm
scared to
> mess this complex system up by straying off the beaten path ;). My
process
> is:
>
> ssh root@engine "init 0"
> (wait for "vdsClient -s 0 list | grep Status:" to show the vm as down)
> hosted-engine --set-maintenance --mode=global
> poweroff
>
> And then on startup:
> hosted-engine --set-maintenance --mode=none
> hosted-engine --vm-start
>
> There are two issues here. I am not sure if they are related or not.
> 1. The NFS timeout during shutdown (Joop do you see this also? Or just
#2?)
> 2. The system reboot instead of poweroff (which messes up remote machine
> management)
>
> Thanks,
> Bob
>
>
>> I think wdmd or sanlock are causing the reboot instead of poweroff
While searching for my issue of wdmd/sanlock not shutting down, I
found this which may interest you both:
https://bugzilla.redhat.com/show_bug.cgi?id=888197
Specifically:
"To shut down sanlock without causing a wdmd reboot, you can run the
following command: "sanlock client shutdown -f 1"
This will cause sanlock to kill any pid's that are holding leases,
release those leases, and then exit.
"
>>
>> Joop
>>
>> _______________________________________________
>> Users mailing list
>> Users(a)ovirt.org
>> http://lists.ovirt.org/mailman/listinfo/users
>
>
> _______________________________________________
> Users mailing list
> Users(a)ovirt.org
> http://lists.ovirt.org/mailman/listinfo/users
10:14 p.m.
On Fri, Jun 6, 2014 at 1:09 PM, Bob Doolittle <bob(a)doolittle.us.com> wrote:
Thanks Andrew, I'll try this workaround tomorrow for sure. But
reading
though that bug report (closed not a bug) it states that the problem should
only arise if something is not releasing a sanlock lease. So if we've
entered Global Maintenance and shut down Engine, the question is what's
holding the lease?
How can that be debugged?
For me it's wdmd and sanlock itself failing to shutdown properly. I
also noticed even when in global maintenance and the engine VM powered
off there is still a sanlock lease for the
/rhev/mnt/....hosted-engine/? lease file or something along those
lines. So the global maintenance may not actually be releasing that
lock.
I'm not too familiar with sanlock etc. So it's like stabbing in the dark :(
-Bob
On Jun 5, 2014 10:56 PM, "Andrew Lau" <andrew(a)andrewklau.com> wrote:
>
> On Mon, May 26, 2014 at 5:10 AM, Bob Doolittle <bob(a)doolittle.us.com>
> wrote:
> >
> > On 05/25/2014 02:51 PM, Joop wrote:
> >>
> >> On 25-5-2014 19:38, Bob Doolittle wrote:
> >>>
> >>>
> >>> Also curious is that when I say "poweroff" it actually reboots
and
> >>> comes
> >>> up again. Could that be due to the timeouts on the way down?
> >>>
> >> Ah, that's something my F19 host does too. Some more info: if engine
> >> hasn't been started on the host then I can shutdown it and it will
> >> poweroff.
> >> IF engine has been run on it then it will reboot.
> >> Its not vdsm (I think) because my shutdown sequence is (on my f19
> >> host):
> >> service ovirt-agent-ha stop
> >> service ovirt-agent-broker stop
> >> service vdsmd stop
> >> ssh root@engine01 "init 0"
> >> init 0
> >>
> >> I don't use maintenance mode because when I poweron my host (= my
> >> desktop)
> >> I want engine to power on automatically which it does most of the time
> >> within 10 min.
> >
> >
> > For comparison, I see this issue and I *do* use maintenance mode
> > (because
> > presumably that's the 'blessed' way to shut things down and I'm
scared
> > to
> > mess this complex system up by straying off the beaten path ;). My
> > process
> > is:
> >
> > ssh root@engine "init 0"
> > (wait for "vdsClient -s 0 list | grep Status:" to show the vm as
down)
> > hosted-engine --set-maintenance --mode=global
> > poweroff
> >
> > And then on startup:
> > hosted-engine --set-maintenance --mode=none
> > hosted-engine --vm-start
> >
> > There are two issues here. I am not sure if they are related or not.
> > 1. The NFS timeout during shutdown (Joop do you see this also? Or just
> > #2?)
> > 2. The system reboot instead of poweroff (which messes up remote machine
> > management)
> >
> > Thanks,
> > Bob
> >
> >
> >> I think wdmd or sanlock are causing the reboot instead of poweroff
>
> While searching for my issue of wdmd/sanlock not shutting down, I
> found this which may interest you both:
> https://bugzilla.redhat.com/show_bug.cgi?id=888197
>
> Specifically:
> "To shut down sanlock without causing a wdmd reboot, you can run the
> following command: "sanlock client shutdown -f 1"
>
> This will cause sanlock to kill any pid's that are holding leases,
> release those leases, and then exit.
> "
>
> >>
> >> Joop
> >>
> >> _______________________________________________
> >> Users mailing list
> >> Users(a)ovirt.org
> >> http://lists.ovirt.org/mailman/listinfo/users
> >
> >
> > _______________________________________________
> > Users mailing list
> > Users(a)ovirt.org
> > http://lists.ovirt.org/mailman/listinfo/users
7:33 a.m.
----- Original Message -----
From: "Andrew Lau" <andrew(a)andrewklau.com>
To: "Bob Doolittle" <bob(a)doolittle.us.com>
Cc: "users" <users(a)ovirt.org>
Sent: Friday, June 6, 2014 6:14:18 AM
Subject: Re: [ovirt-users] Can HA Agent control NFS Mount?
On Fri, Jun 6, 2014 at 1:09 PM, Bob Doolittle <bob(a)doolittle.us.com> wrote:
> Thanks Andrew, I'll try this workaround tomorrow for sure. But reading
> though that bug report (closed not a bug) it states that the problem should
> only arise if something is not releasing a sanlock lease. So if we've
> entered Global Maintenance and shut down Engine, the question is what's
> holding the lease?
>
> How can that be debugged?
For me it's wdmd and sanlock itself failing to shutdown properly. I
also noticed even when in global maintenance and the engine VM powered
off there is still a sanlock lease for the
/rhev/mnt/....hosted-engine/? lease file or something along those
lines. So the global maintenance may not actually be releasing that
lock.
I'm not too familiar with sanlock etc. So it's like stabbing in the dark :(
Sounds like a bug since once the VM is off there should not
be a lease taken.
Please check if after a minute you still have a lease taken
according to: http://www.ovirt.org/SANLock#sanlock_timeouts
In this case try to stop vdsm and libvirt just so we'll know
who still keeps the lease.
>
> -Bob
>
> On Jun 5, 2014 10:56 PM, "Andrew Lau" <andrew(a)andrewklau.com>
wrote:
>>
>> On Mon, May 26, 2014 at 5:10 AM, Bob Doolittle <bob(a)doolittle.us.com>
>> wrote:
>> >
>> > On 05/25/2014 02:51 PM, Joop wrote:
>> >>
>> >> On 25-5-2014 19:38, Bob Doolittle wrote:
>> >>>
>> >>>
>> >>> Also curious is that when I say "poweroff" it actually
reboots and
>> >>> comes
>> >>> up again. Could that be due to the timeouts on the way down?
>> >>>
>> >> Ah, that's something my F19 host does too. Some more info: if
engine
>> >> hasn't been started on the host then I can shutdown it and it will
>> >> poweroff.
>> >> IF engine has been run on it then it will reboot.
>> >> Its not vdsm (I think) because my shutdown sequence is (on my f19
>> >> host):
>> >> service ovirt-agent-ha stop
>> >> service ovirt-agent-broker stop
>> >> service vdsmd stop
>> >> ssh root@engine01 "init 0"
>> >> init 0
>> >>
>> >> I don't use maintenance mode because when I poweron my host (= my
>> >> desktop)
>> >> I want engine to power on automatically which it does most of the time
>> >> within 10 min.
>> >
>> >
>> > For comparison, I see this issue and I *do* use maintenance mode
>> > (because
>> > presumably that's the 'blessed' way to shut things down and
I'm scared
>> > to
>> > mess this complex system up by straying off the beaten path ;). My
>> > process
>> > is:
>> >
>> > ssh root@engine "init 0"
>> > (wait for "vdsClient -s 0 list | grep Status:" to show the vm as
down)
>> > hosted-engine --set-maintenance --mode=global
>> > poweroff
>> >
>> > And then on startup:
>> > hosted-engine --set-maintenance --mode=none
>> > hosted-engine --vm-start
>> >
>> > There are two issues here. I am not sure if they are related or not.
>> > 1. The NFS timeout during shutdown (Joop do you see this also? Or just
>> > #2?)
>> > 2. The system reboot instead of poweroff (which messes up remote machine
>> > management)
>> >
>> > Thanks,
>> > Bob
>> >
>> >
>> >> I think wdmd or sanlock are causing the reboot instead of poweroff
>>
>> While searching for my issue of wdmd/sanlock not shutting down, I
>> found this which may interest you both:
>> https://bugzilla.redhat.com/show_bug.cgi?id=888197
>>
>> Specifically:
>> "To shut down sanlock without causing a wdmd reboot, you can run the
>> following command: "sanlock client shutdown -f 1"
>>
>> This will cause sanlock to kill any pid's that are holding leases,
>> release those leases, and then exit.
>> "
>>
>> >>
>> >> Joop
>> >>
6:29 p.m.
It turns out I was wrong before. I don't have to start up Engine to get
into this situation.
I did the following:
* Turn on Global Maintenance
* Engine init 0
* Reboot node
* Wait a few minutes
* poweroff
I'll get the timeouts and hangs during shutdown again, and a reset
instead of poweroff.
It's possible that somehow the system is coming out of Global
Maintenance mode during shutdown, and the Engine VM is starting up and
causing this issue.
I did the following.
1. hosted-engine --set-maintenance --mode=none
You can see the attached output from 'hosted-engine --vm-status'
(hosted-engine.out) at this point, indicating that the system is in
Global Maintenance
2. Waited 60 seconds, and checked sanlock
You can see the attached output of 'sanlock client status'
(sanlock-status.out) at this point, showing the Engine VM locks being held
3. I stopped the vdsmd service (note that the first time I tried I got
"Job for vdsmd.service cancelled", and re-issued the stop.
You can see the attached output of 'sanlock client status', and the
following commands (output)
What's interesting and I didn't notice right away, is that after I
stopped vdsmd the sanlock status started changing as if the locks were
being manipulated.
After I stopped vdsmd, the HA services, and libvirtd, and waited 60
seconds, I noticed the locks seemed to be changing state and that
HostedEngine was listed. At that point I got suspicious and started
vdsmd again so that I could recheck Global Maintenance mode, and I found
that the system was no longer *in* maintenance, and that the Engine VM
was running.
So I think this partly explains the situation. Somehow the act of
stopping vdsmd is making the system look like it is *out* of Global
Maintenance mode, and the Engine VM starts up while the system is
shutting down. This creates new sanlock leases on the Engine VM storage,
which prevents the system from shutting down cleanly. Oddly after a
reboot Global Maintenance is preserved.
But there may be more going on. Even if I stop vdsmd, the HA services,
and libvirtd, and sleep 60 seconds, I still see a lock held on the
Engine VM storage:
daemon 6f3af037-d05e-4ad8-a53c-61627e0c2464.xion2.smar
p -1 helper
p -1 listener
p -1 status
s
003510e8-966a-47e6-a5eb-3b5c8a6070a9:1:/rhev/data-center/mnt/xion2.smartcity.net\:_export_VM__NewDataDomain/003510e8-966a-47e6-a5eb-3b5c8a6070a9/dom_md/ids:0
s
hosted-engine:1:/rhev/data-center/mnt/xion2\:_export_vm_he1/18eeab54-e482-497f-b096-11f8a43f94f4/ha_agent/hosted-engine.lockspace:0
It stays in this state however and HostedEngine doesn't grab a lock again.
In any case no matter what I do, it's impossible to shut the system down
cleanly.
-Bob
On 06/13/2014 08:33 AM, Doron Fediuck wrote:
----- Original Message -----
> From: "Andrew Lau"<andrew(a)andrewklau.com>
> To: "Bob Doolittle"<bob(a)doolittle.us.com>
> Cc: "users"<users(a)ovirt.org>
> Sent: Friday, June 6, 2014 6:14:18 AM
> Subject: Re: [ovirt-users] Can HA Agent control NFS Mount?
>
> On Fri, Jun 6, 2014 at 1:09 PM, Bob Doolittle<bob(a)doolittle.us.com> wrote:
>> Thanks Andrew, I'll try this workaround tomorrow for sure. But reading
>> though that bug report (closed not a bug) it states that the problem should
>> only arise if something is not releasing a sanlock lease. So if we've
>> entered Global Maintenance and shut down Engine, the question is what's
>> holding the lease?
>>
>> How can that be debugged?
> For me it's wdmd and sanlock itself failing to shutdown properly. I
> also noticed even when in global maintenance and the engine VM powered
> off there is still a sanlock lease for the
> /rhev/mnt/....hosted-engine/? lease file or something along those
> lines. So the global maintenance may not actually be releasing that
> lock.
>
> I'm not too familiar with sanlock etc. So it's like stabbing in the dark :(
>
Sounds like a bug since once the VM is off there should not
be a lease taken.
Please check if after a minute you still have a lease taken
according to:http://www.ovirt.org/SANLock#sanlock_timeouts
In this case try to stop vdsm and libvirt just so we'll know
who still keeps the lease.
>> -Bob
>>
>> On Jun 5, 2014 10:56 PM, "Andrew Lau"<andrew(a)andrewklau.com>
wrote:
>>> On Mon, May 26, 2014 at 5:10 AM, Bob Doolittle<bob(a)doolittle.us.com>
>>> wrote:
>>>> On 05/25/2014 02:51 PM, Joop wrote:
>>>>> On 25-5-2014 19:38, Bob Doolittle wrote:
>>>>>> Also curious is that when I say "poweroff" it actually
reboots and
>>>>>> comes
>>>>>> up again. Could that be due to the timeouts on the way down?
>>>>>>
>>>>> Ah, that's something my F19 host does too. Some more info: if
engine
>>>>> hasn't been started on the host then I can shutdown it and it
will
>>>>> poweroff.
>>>>> IF engine has been run on it then it will reboot.
>>>>> Its not vdsm (I think) because my shutdown sequence is (on my f19
>>>>> host):
>>>>> service ovirt-agent-ha stop
>>>>> service ovirt-agent-broker stop
>>>>> service vdsmd stop
>>>>> ssh root@engine01 "init 0"
>>>>> init 0
>>>>>
>>>>> I don't use maintenance mode because when I poweron my host (=
my
>>>>> desktop)
>>>>> I want engine to power on automatically which it does most of the
time
>>>>> within 10 min.
>>>> For comparison, I see this issue and I *do* use maintenance mode
>>>> (because
>>>> presumably that's the 'blessed' way to shut things down and
I'm scared
>>>> to
>>>> mess this complex system up by straying off the beaten path ;). My
>>>> process
>>>> is:
>>>>
>>>> ssh root@engine "init 0"
>>>> (wait for "vdsClient -s 0 list | grep Status:" to show the vm
as down)
>>>> hosted-engine --set-maintenance --mode=global
>>>> poweroff
>>>>
>>>> And then on startup:
>>>> hosted-engine --set-maintenance --mode=none
>>>> hosted-engine --vm-start
>>>>
>>>> There are two issues here. I am not sure if they are related or not.
>>>> 1. The NFS timeout during shutdown (Joop do you see this also? Or just
>>>> #2?)
>>>> 2. The system reboot instead of poweroff (which messes up remote machine
>>>> management)
>>>>
>>>> Thanks,
>>>> Bob
>>>>
>>>>
>>>>> I think wdmd or sanlock are causing the reboot instead of poweroff
>>> While searching for my issue of wdmd/sanlock not shutting down, I
>>> found this which may interest you both:
>>> https://bugzilla.redhat.com/show_bug.cgi?id=888197
>>>
>>> Specifically:
>>> "To shut down sanlock without causing a wdmd reboot, you can run the
>>> following command: "sanlock client shutdown -f 1"
>>>
>>> This will cause sanlock to kill any pid's that are holding leases,
>>> release those leases, and then exit.
>>> "
>>>
>>>>> Joop
>>>>>
4:06 a.m.
----- Original Message -----
From: "Bob Doolittle" <bob(a)doolittle.us.com>
To: "Doron Fediuck" <dfediuck(a)redhat.com>, "Andrew Lau"
<andrew(a)andrewklau.com>
Cc: "users" <users(a)ovirt.org>, "Federico Simoncelli"
<fsimonce(a)redhat.com>
Sent: Saturday, June 14, 2014 1:29:54 AM
Subject: Re: [ovirt-users] Can HA Agent control NFS Mount?
But there may be more going on. Even if I stop vdsmd, the HA services,
and libvirtd, and sleep 60 seconds, I still see a lock held on the
Engine VM storage:
daemon 6f3af037-d05e-4ad8-a53c-61627e0c2464.xion2.smar
p -1 helper
p -1 listener
p -1 status
s
003510e8-966a-47e6-a5eb-3b5c8a6070a9:1:/rhev/data-center/mnt/xion2.smartcity.net\:_export_VM__NewDataDomain/003510e8-966a-47e6-a5eb-3b5c8a6070a9/dom_md/ids:0
s
hosted-engine:1:/rhev/data-center/mnt/xion2\:_export_vm_he1/18eeab54-e482-497f-b096-11f8a43f94f4/ha_agent/hosted-engine.lockspace:0
This output shows that the lockspaces are still acquired. When you put hosted-engine
in maintenance they must be released.
One by directly using rem_lockspace (since it's the hosted-engine one) and the other
one by stopMonitoringDomain.
I quickly looked at the ovirt-hosted-engine* projects and I haven't found anything
related to that.
--
Federico
6:53 a.m.
I see I have a very unfortunate typo in my previous mail. As supported by
the vm-status output I attached, I had set --mode=global (not none) in step
1.
I am not the only one experiencing this. I can reproduce it easily. It
appears that shutting down vdsm causes the HA services to incorrectly think
the system has come out of Global Maintenance and restart the engine.
-Bob
On Jun 18, 2014 5:06 AM, "Federico Simoncelli" <fsimonce(a)redhat.com>
wrote:
----- Original Message -----
> From: "Bob Doolittle" <bob(a)doolittle.us.com>
> To: "Doron Fediuck" <dfediuck(a)redhat.com>, "Andrew Lau"
<
andrew(a)andrewklau.com>
> Cc: "users" <users(a)ovirt.org>, "Federico Simoncelli" <
fsimonce(a)redhat.com>
> Sent: Saturday, June 14, 2014 1:29:54 AM
> Subject: Re: [ovirt-users] Can HA Agent control NFS Mount?
>
>
> But there may be more going on. Even if I stop vdsmd, the HA services,
> and libvirtd, and sleep 60 seconds, I still see a lock held on the
> Engine VM storage:
>
> daemon 6f3af037-d05e-4ad8-a53c-61627e0c2464.xion2.smar
> p -1 helper
> p -1 listener
> p -1 status
> s 003510e8-966a-47e6-a5eb-3b5c8a6070a9:1:/rhev/data-center/mnt/
xion2.smartcity.net
\:_export_VM__NewDataDomain/003510e8-966a-47e6-a5eb-3b5c8a6070a9/dom_md/ids:0
> s
hosted-engine:1:/rhev/data-center/mnt/xion2\:_export_vm_he1/18eeab54-e482-497f-b096-11f8a43f94f4/ha_agent/hosted-engine.lockspace:0
This output shows that the lockspaces are still acquired. When you put
hosted-engine
in maintenance they must be released.
One by directly using rem_lockspace (since it's the hosted-engine one) and
the other
one by stopMonitoringDomain.
I quickly looked at the ovirt-hosted-engine* projects and I haven't found
anything
related to that.
--
Federico
7:10 p.m.
This is a multi-part message in MIME format.
--------------000900020607080304050108
Content-Type: text/plain; charset=UTF-8; format=flowed
Content-Transfer-Encoding: 7bit
Specifically, if do the following:
* Enter global maintenance (hosted-engine --set-maintenance-mode
--mode=global)
* init 0 the engine
* systemctl stop ovirt-ha-agent ovirt-ha-broker libvirtd vdmsd
and then run "sanlock client status" I see:
# sanlock client status
daemon c715b5de-fd98-4146-a0b1-e9801179c768.xion2.smar
p -1 helper
p -1 listener
p -1 status
s
003510e8-966a-47e6-a5eb-3b5c8a6070a9:1:/rhev/data-center/mnt/xion2.smartcity.net\:_export_VM__NewDataDomain/003510e8-966a-47e6-a5eb-3b5c8a6070a9/dom_md/ids:0
s
18eeab54-e482-497f-b096-11f8a43f94f4:1:/rhev/data-center/mnt/xion2\:_export_vm_he1/18eeab54-e482-497f-b096-11f8a43f94f4/dom_md/ids:0
s
hosted-engine:1:/rhev/data-center/mnt/xion2\:_export_vm_he1/18eeab54-e482-497f-b096-11f8a43f94f4/ha_agent/hosted-engine.lockspace:0
Waiting a few minutes does not change this state.
The earlier data I shared which showed HostedEngine was with a different
test scenario.
-Bob
On 06/18/2014 07:53 AM, Bob Doolittle wrote:
I see I have a very unfortunate typo in my previous mail. As supported
by the vm-status output I attached, I had set --mode=global (not none)
in step 1.
I am not the only one experiencing this. I can reproduce it easily. It
appears that shutting down vdsm causes the HA services to incorrectly
think the system has come out of Global Maintenance and restart the
engine.
-Bob
On Jun 18, 2014 5:06 AM, "Federico Simoncelli" <fsimonce(a)redhat.com
<mailto:fsimonce@redhat.com>> wrote:
----- Original Message -----
> From: "Bob Doolittle" <bob(a)doolittle.us.com
<mailto:bob@doolittle.us.com>>
> To: "Doron Fediuck" <dfediuck(a)redhat.com
<mailto:dfediuck@redhat.com>>, "Andrew Lau"
<andrew(a)andrewklau.com
<mailto:andrew@andrewklau.com>>
> Cc: "users" <users(a)ovirt.org <mailto:users@ovirt.org>>,
"Federico Simoncelli" <fsimonce(a)redhat.com
<mailto:fsimonce@redhat.com>>
> Sent: Saturday, June 14, 2014 1:29:54 AM
> Subject: Re: [ovirt-users] Can HA Agent control NFS Mount?
>
>
> But there may be more going on. Even if I stop vdsmd, the HA
services,
> and libvirtd, and sleep 60 seconds, I still see a lock held on the
> Engine VM storage:
>
> daemon 6f3af037-d05e-4ad8-a53c-61627e0c2464.xion2.smar
> p -1 helper
> p -1 listener
> p -1 status
> s
003510e8-966a-47e6-a5eb-3b5c8a6070a9:1:/rhev/data-center/mnt/xion2.smartc...
<http://xion2.smartcity.net>\:_export_VM__NewDataDomain/003510e8-966a-4...
> s
hosted-engine:1:/rhev/data-center/mnt/xion2\:_export_vm_he1/18eeab54-e482-497f-b096-11f8a43f94f4/ha_agent/hosted-engine.lockspace:0
This output shows that the lockspaces are still acquired. When you
put hosted-engine
in maintenance they must be released.
One by directly using rem_lockspace (since it's the hosted-engine
one) and the other
one by stopMonitoringDomain.
I quickly looked at the ovirt-hosted-engine* projects and I
haven't found anything
related to that.
--
Federico
--------------000900020607080304050108
Content-Type: text/html; charset=UTF-8
Content-Transfer-Encoding: 7bit
<html>
<head>
<meta content="text/html; charset=UTF-8"
http-equiv="Content-Type">
</head>
<body bgcolor="#FFFFFF" text="#000000">
Specifically, if do the following:<br>
<ul>
<li>Enter global maintenance (hosted-engine --set-maintenance-mode
--mode=global)</li>
<li>init 0 the engine</li>
<li>systemctl stop ovirt-ha-agent ovirt-ha-broker libvirtd vdmsd</li>
</ul>
<br>
and then run "sanlock client status" I see:<br>
<br>
<pre># sanlock client status
daemon c715b5de-fd98-4146-a0b1-e9801179c768.xion2.smar
p -1 helper
p -1 listener
p -1 status
s
003510e8-966a-47e6-a5eb-3b5c8a6070a9:1:/rhev/data-center/mnt/xion2.smartcity.net\:_export_VM__NewDataDomain/003510e8-966a-47e6-a5eb-3b5c8a6070a9/dom_md/ids:0
s
18eeab54-e482-497f-b096-11f8a43f94f4:1:/rhev/data-center/mnt/xion2\:_export_vm_he1/18eeab54-e482-497f-b096-11f8a43f94f4/dom_md/ids:0
s
hosted-engine:1:/rhev/data-center/mnt/xion2\:_export_vm_he1/18eeab54-e482-497f-b096-11f8a43f94f4/ha_agent/hosted-engine.lockspace:0
</pre>
<br>
Waiting a few minutes does not change this state.<br>
<br>
The earlier data I shared which showed HostedEngine was with a
different test scenario.<br>
<br>
-Bob<br>
<br>
<div class="moz-cite-prefix">On 06/18/2014 07:53 AM, Bob Doolittle
wrote:<br>
</div>
<blockquote
cite="mid:CA+4jJ+se2odydTJySxvwMaA3G7zOUZsZdWDFE6ajFFDMVwiA9A@mail.gmail.com"
type="cite">
<p dir="ltr">I see I have a very unfortunate typo in my previous
mail. As supported by the vm-status output I attached, I had set
--mode=global (not none) in step 1.</p>
<p dir="ltr">I am not the only one experiencing this. I can
reproduce it easily. It appears that shutting down vdsm causes
the HA services to incorrectly think the system has come out of
Global Maintenance and restart the engine.</p>
<p dir="ltr">-Bob</p>
<div class="gmail_quote">On Jun 18, 2014 5:06 AM, "Federico
Simoncelli" <<a moz-do-not-send="true"
href="mailto:fsimonce@redhat.com">fsimonce@redhat.com</a>>
wrote:<br type="attribution">
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">
----- Original Message -----<br>
> From: "Bob Doolittle" <<a
moz-do-not-send="true"
href="mailto:bob@doolittle.us.com">bob@doolittle.us.com</a>><br>
> To: "Doron Fediuck" <<a
moz-do-not-send="true"
href="mailto:dfediuck@redhat.com">dfediuck@redhat.com</a>>,
"Andrew Lau" <<a moz-do-not-send="true"
href="mailto:andrew@andrewklau.com">andrew@andrewklau.com</a>><br>
> Cc: "users" <<a moz-do-not-send="true"
href="mailto:users@ovirt.org">users@ovirt.org</a>>,
"Federico Simoncelli" <<a moz-do-not-send="true"
href="mailto:fsimonce@redhat.com">fsimonce@redhat.com</a>><br>
> Sent: Saturday, June 14, 2014 1:29:54 AM<br>
> Subject: Re: [ovirt-users] Can HA Agent control NFS
Mount?<br>
><br>
><br>
> But there may be more going on. Even if I stop vdsmd, the
HA services,<br>
> and libvirtd, and sleep 60 seconds, I still see a lock
held on the<br>
> Engine VM storage:<br>
><br>
> daemon 6f3af037-d05e-4ad8-a53c-61627e0c2464.xion2.smar<br>
> p -1 helper<br>
> p -1 listener<br>
> p -1 status<br>
> s
003510e8-966a-47e6-a5eb-3b5c8a6070a9:1:/rhev/data-center/mnt/<a
moz-do-not-send="true" href="http://xion2.smartcity.net"
target="_blank">xion2.smartcity.net</a>\:_export_VM__NewDataDomain/003510e8-966a-47e6-a5eb-3b5c8a6070a9/dom_md/ids:0<br>
> s
hosted-engine:1:/rhev/data-center/mnt/xion2\:_export_vm_he1/18eeab54-e482-497f-b096-11f8a43f94f4/ha_agent/hosted-engine.lockspace:0<br>
<br>
This output shows that the lockspaces are still acquired. When
you put hosted-engine<br>
in maintenance they must be released.<br>
One by directly using rem_lockspace (since it's the
hosted-engine one) and the other<br>
one by stopMonitoringDomain.<br>
<br>
I quickly looked at the ovirt-hosted-engine* projects and I
haven't found anything<br>
related to that.<br>
<br>
--<br>
Federico<br>
</blockquote>
</div>
</blockquote>
<br>
</body>
</html>
--------------000900020607080304050108--
8:24 a.m.
Hi,
Did anyone find much luck tracking this down? I rebooted one of our servers
and hit this issue again, conveniently, the dell remote access card has
borked as well.. so a 50 minute trip to the DC..
On Thu, Jun 19, 2014 at 10:10 AM, Bob Doolittle <bobddroid(a)gmail.com> wrote:
Specifically, if do the following:
- Enter global maintenance (hosted-engine --set-maintenance-mode
--mode=global)
- init 0 the engine
- systemctl stop ovirt-ha-agent ovirt-ha-broker libvirtd vdmsd
and then run "sanlock client status" I see:
# sanlock client status
daemon c715b5de-fd98-4146-a0b1-e9801179c768.xion2.smar
p -1 helper
p -1 listener
p -1 status
s
003510e8-966a-47e6-a5eb-3b5c8a6070a9:1:/rhev/data-center/mnt/xion2.smartcity.net\:_export_VM__NewDataDomain/003510e8-966a-47e6-a5eb-3b5c8a6070a9/dom_md/ids:0
s
18eeab54-e482-497f-b096-11f8a43f94f4:1:/rhev/data-center/mnt/xion2\:_export_vm_he1/18eeab54-e482-497f-b096-11f8a43f94f4/dom_md/ids:0
s
hosted-engine:1:/rhev/data-center/mnt/xion2\:_export_vm_he1/18eeab54-e482-497f-b096-11f8a43f94f4/ha_agent/hosted-engine.lockspace:0
Waiting a few minutes does not change this state.
The earlier data I shared which showed HostedEngine was with a different
test scenario.
-Bob
On 06/18/2014 07:53 AM, Bob Doolittle wrote:
I see I have a very unfortunate typo in my previous mail. As supported by
the vm-status output I attached, I had set --mode=global (not none) in step
1.
I am not the only one experiencing this. I can reproduce it easily. It
appears that shutting down vdsm causes the HA services to incorrectly think
the system has come out of Global Maintenance and restart the engine.
-Bob
On Jun 18, 2014 5:06 AM, "Federico Simoncelli" <fsimonce(a)redhat.com>
wrote:
> ----- Original Message -----
> > From: "Bob Doolittle" <bob(a)doolittle.us.com>
> > To: "Doron Fediuck" <dfediuck(a)redhat.com>, "Andrew
Lau" <
> andrew(a)andrewklau.com>
> > Cc: "users" <users(a)ovirt.org>, "Federico Simoncelli"
<
> fsimonce(a)redhat.com>
> > Sent: Saturday, June 14, 2014 1:29:54 AM
> > Subject: Re: [ovirt-users] Can HA Agent control NFS Mount?
> >
> >
> > But there may be more going on. Even if I stop vdsmd, the HA services,
> > and libvirtd, and sleep 60 seconds, I still see a lock held on the
> > Engine VM storage:
> >
> > daemon 6f3af037-d05e-4ad8-a53c-61627e0c2464.xion2.smar
> > p -1 helper
> > p -1 listener
> > p -1 status
> > s 003510e8-966a-47e6-a5eb-3b5c8a6070a9:1:/rhev/data-center/mnt/
> xion2.smartcity.net
> \:_export_VM__NewDataDomain/003510e8-966a-47e6-a5eb-3b5c8a6070a9/dom_md/ids:0
> > s
>
hosted-engine:1:/rhev/data-center/mnt/xion2\:_export_vm_he1/18eeab54-e482-497f-b096-11f8a43f94f4/ha_agent/hosted-engine.lockspace:0
>
> This output shows that the lockspaces are still acquired. When you put
> hosted-engine
> in maintenance they must be released.
> One by directly using rem_lockspace (since it's the hosted-engine one)
> and the other
> one by stopMonitoringDomain.
>
> I quickly looked at the ovirt-hosted-engine* projects and I haven't found
> anything
> related to that.
>
> --
> Federico
>
8:52 a.m.
btw, this happened on an aborted hosted-engine install. So, the ha-agents
hadn't even started up.. just the VM running.
On Sat, Jul 19, 2014 at 11:24 PM, Andrew Lau <andrew(a)andrewklau.com> wrote:
Hi,
Did anyone find much luck tracking this down? I rebooted one of our
servers and hit this issue again, conveniently, the dell remote access card
has borked as well.. so a 50 minute trip to the DC..
On Thu, Jun 19, 2014 at 10:10 AM, Bob Doolittle <bobddroid(a)gmail.com>
wrote:
> Specifically, if do the following:
>
> - Enter global maintenance (hosted-engine --set-maintenance-mode
> --mode=global)
> - init 0 the engine
> - systemctl stop ovirt-ha-agent ovirt-ha-broker libvirtd vdmsd
>
>
> and then run "sanlock client status" I see:
>
> # sanlock client status
> daemon c715b5de-fd98-4146-a0b1-e9801179c768.xion2.smar
> p -1 helper
> p -1 listener
> p -1 status
> s
003510e8-966a-47e6-a5eb-3b5c8a6070a9:1:/rhev/data-center/mnt/xion2.smartcity.net\:_export_VM__NewDataDomain/003510e8-966a-47e6-a5eb-3b5c8a6070a9/dom_md/ids:0
> s
18eeab54-e482-497f-b096-11f8a43f94f4:1:/rhev/data-center/mnt/xion2\:_export_vm_he1/18eeab54-e482-497f-b096-11f8a43f94f4/dom_md/ids:0
> s
hosted-engine:1:/rhev/data-center/mnt/xion2\:_export_vm_he1/18eeab54-e482-497f-b096-11f8a43f94f4/ha_agent/hosted-engine.lockspace:0
>
>
> Waiting a few minutes does not change this state.
>
> The earlier data I shared which showed HostedEngine was with a different
> test scenario.
>
> -Bob
>
>
> On 06/18/2014 07:53 AM, Bob Doolittle wrote:
>
> I see I have a very unfortunate typo in my previous mail. As supported by
> the vm-status output I attached, I had set --mode=global (not none) in step
> 1.
>
> I am not the only one experiencing this. I can reproduce it easily. It
> appears that shutting down vdsm causes the HA services to incorrectly think
> the system has come out of Global Maintenance and restart the engine.
>
> -Bob
> On Jun 18, 2014 5:06 AM, "Federico Simoncelli" <fsimonce(a)redhat.com>
> wrote:
>
>> ----- Original Message -----
>> > From: "Bob Doolittle" <bob(a)doolittle.us.com>
>> > To: "Doron Fediuck" <dfediuck(a)redhat.com>, "Andrew
Lau" <
>> andrew(a)andrewklau.com>
>> > Cc: "users" <users(a)ovirt.org>, "Federico
Simoncelli" <
>> fsimonce(a)redhat.com>
>> > Sent: Saturday, June 14, 2014 1:29:54 AM
>> > Subject: Re: [ovirt-users] Can HA Agent control NFS Mount?
>> >
>> >
>> > But there may be more going on. Even if I stop vdsmd, the HA services,
>> > and libvirtd, and sleep 60 seconds, I still see a lock held on the
>> > Engine VM storage:
>> >
>> > daemon 6f3af037-d05e-4ad8-a53c-61627e0c2464.xion2.smar
>> > p -1 helper
>> > p -1 listener
>> > p -1 status
>> > s 003510e8-966a-47e6-a5eb-3b5c8a6070a9:1:/rhev/data-center/mnt/
>> xion2.smartcity.net
>> \:_export_VM__NewDataDomain/003510e8-966a-47e6-a5eb-3b5c8a6070a9/dom_md/ids:0
>> > s
>>
hosted-engine:1:/rhev/data-center/mnt/xion2\:_export_vm_he1/18eeab54-e482-497f-b096-11f8a43f94f4/ha_agent/hosted-engine.lockspace:0
>>
>> This output shows that the lockspaces are still acquired. When you put
>> hosted-engine
>> in maintenance they must be released.
>> One by directly using rem_lockspace (since it's the hosted-engine one)
>> and the other
>> one by stopMonitoringDomain.
>>
>> I quickly looked at the ovirt-hosted-engine* projects and I haven't
>> found anything
>> related to that.
>>
>> --
>> Federico
>>
>
>
3:06 a.m.
Hi,
One by directly using rem_lockspace (since it's the hosted-engine
one)
The hosted engine lockspace protects the ID of the node. Global maintenance only disables
the state machine, but it still reports data to the shared storage. The hosted engine lock
can only be released when the agent is down. If the lock is still there even after you
call service ovirt-ha-agent stop, then it is a bug somewhere.
the other one by stopMonitoringDomain
Shouldn't this be done by VDSM or sanlock when the VM disappears? The lock has to stay
acquired any time the VM is running (independently on the hosted engine services or vdsm)
to protect the VM's data. We can't release a lock for running VM, because some
other host might try to start it and corrupt data by doing it.
Martin
--
Martin Sivák
msivak(a)redhat.com
Red Hat Czech
RHEV-M SLA / Brno, CZ
----- Original Message -----
----- Original Message -----
> From: "Bob Doolittle" <bob(a)doolittle.us.com>
> To: "Doron Fediuck" <dfediuck(a)redhat.com>, "Andrew Lau"
> <andrew(a)andrewklau.com>
> Cc: "users" <users(a)ovirt.org>, "Federico Simoncelli"
<fsimonce(a)redhat.com>
> Sent: Saturday, June 14, 2014 1:29:54 AM
> Subject: Re: [ovirt-users] Can HA Agent control NFS Mount?
>
>
> But there may be more going on. Even if I stop vdsmd, the HA services,
> and libvirtd, and sleep 60 seconds, I still see a lock held on the
> Engine VM storage:
>
> daemon 6f3af037-d05e-4ad8-a53c-61627e0c2464.xion2.smar
> p -1 helper
> p -1 listener
> p -1 status
> s
>
003510e8-966a-47e6-a5eb-3b5c8a6070a9:1:/rhev/data-center/mnt/xion2.smartcity.net\:_export_VM__NewDataDomain/003510e8-966a-47e6-a5eb-3b5c8a6070a9/dom_md/ids:0
> s
>
hosted-engine:1:/rhev/data-center/mnt/xion2\:_export_vm_he1/18eeab54-e482-497f-b096-11f8a43f94f4/ha_agent/hosted-engine.lockspace:0
This output shows that the lockspaces are still acquired. When you put
hosted-engine
in maintenance they must be released.
One by directly using rem_lockspace (since it's the hosted-engine one) and
the other
one by stopMonitoringDomain.
I quickly looked at the ovirt-hosted-engine* projects and I haven't found
anything
related to that.
--
Federico
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