5:45 p.m.
--_000_831f30ed018b4739a2491cbd24f2429depsaero_
Content-Type: text/plain; charset="us-ascii"
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Hi All,
I had issue with the storage that hosted my engine vm. The disk got corrupt=
ed and I needed to restore the engine from a backup. That worked as expecte=
d, I just didn't start the engine yet. I know that after the backup was tak=
en some machines where migrated around before the engine disks failed. My q=
uestion is what will happen once I start the engine service which has the r=
estored backup on it ? Will it query the hosts for the running VMs or will =
it assume that the VMs are still on the hosts as they resided at the point =
of backup ? Would I need to change the DB manual to let the engine know whe=
re VMs are up at this point ? What will happen to HA VMs ? I feel that it m=
ight try to start them a second time. My biggest issue is that I can't get=
a service Windows to shutdown all VMs and then lat them restart by the eng=
ine.
Is there a known workflow for that ?
Thank you,
Sven
--_000_831f30ed018b4739a2491cbd24f2429depsaero_
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link=3D"#0563C1" vlink=3D"#954F72" <div
class=3D"WordSection1" <p
class=3D"MsoNormal">Hi All, <o:p></o:p></p <p
class=3D"MsoNormal"><o:p> </o:p></p <p class=3D"MsoNormal"><span
lang=3D"EN-US">I had issue with the storage th=
at hosted my engine vm. The disk got corrupted and I needed to restore the =
engine from a backup. That worked as expected, I just didn’t start th=
e engine yet. I know that after the backup
was taken some machines where migrated around before the engine disks fail=
ed. My question is what will happen once I start the engine service which h=
as the restored backup on it ? Will it query the hosts for the running VMs =
or will it assume that the VMs are
still on the hosts as they resided at the point of backup ? Would I need t=
o change the DB manual to let the engine know where VMs are up at this poin=
t ? What will happen to HA VMs ? I feel that it might try to start them a s=
econd time. My biggest issue is
that I can’t get a service Windows to shutdown all VMs and then lat =
them restart by the engine.<o:p></o:p></span></p <p class=3D"MsoNormal"><span
lang=3D"EN-US"><o:p> </o:p></span></p <p class=3D"MsoNormal"><span
lang=3D"EN-US">Is there a known workflow for t=
hat ? <o:p </o:p></span></p <p class=3D"MsoNormal"><span
lang=3D"EN-US"><o:p> </o:p></span></p <p class=3D"MsoNormal"><span
lang=3D"EN-US">Thank you, <o:p></o:p></span></=
p <p class=3D"MsoNormal"><span
lang=3D"EN-US">Sven <o:p></o:p></span></p </div
</body </html
--_000_831f30ed018b4739a2491cbd24f2429depsaero_--
2:32 a.m.
On Sun, Mar 18, 2018 at 11:45 PM, Sven Achtelik <Sven.Achtelik(a)eps.aero> wrote:
Hi All,
I had issue with the storage that hosted my engine vm. The disk got
corrupted and I needed to restore the engine from a backup.
How did you backup, and how did you restore?
Which version was used for each?
That worked as
expected, I just didn’t start the engine yet.
OK.
I know that after the backup
was taken some machines where migrated around before the engine disks
failed.
Are these machines HA?
My question is what will happen once I start the engine service
which has the restored backup on it ? Will it query the hosts for the
running VMs
It will, but HA machines are handled differently.
See also:
https://bugzilla.redhat.com/show_bug.cgi?id=1441322
https://bugzilla.redhat.com/show_bug.cgi?id=1446055
or will it assume that the VMs are still on the hosts as they
resided at the point of backup ?
It does, initially, but then updates status according to what it
gets from hosts.
But polling the hosts takes time, especially if you have many, and
HA policy might require faster handling. So if it polls first a
host that had a machine on it during backup, and sees that it's
gone, and didn't yet poll the new host, HA handling starts immediately,
which eventually might lead to starting the VM on another host.
To prevent that, the fixes to above bugs make the restore process
mark HA VMs that do not have leases on the storage as "dead".
Would I need to change the DB manual to let
the engine know where VMs are up at this point ?
You might need to, if you have HA VMs and a too-old version of restore.
What will happen to HA VMs
? I feel that it might try to start them a second time. My biggest issue is
that I can’t get a service Windows to shutdown all VMs and then lat them
restart by the engine.
Is there a known workflow for that ?
I am not aware of a tested procedure for handling above if you have
a too-old version, but you can check the patches linked from above bugs
and manually run the SQL command(s) they include. They are essentially
comment 4 of the first bug.
Good luck and best regards,
--
Didi
5:03 a.m.
--_000_fda73b8eac2340ef927a807d4e72fbdbepsaero_
Content-Type: text/plain; charset="Windows-1252"
Content-Transfer-Encoding: quoted-printable
Hi Didi,
my backups where taken with the end. Backup utility. I have 3 Data centers,=
two of them with just one host and the third one with 3 hosts running the =
engine. The backup three days old, was taken on engine version 4.1 (4.1.7)=
and the restored engine is running on 4.1.9. I have three HA VMs that woul=
d be affected. All others are just normal vms. Sounds like it would be the =
safest to shut down the HA vm S to make sure that nothing happens ? Or can =
I disable the HA action in the DB for now ?
Thank you,
Sven
Von meinem Samsung Galaxy Smartphone gesendet.
-------- Urspr=FCngliche Nachricht --------
Von: Yedidyah Bar David <didi(a)redhat.com Datum:
19.03.18 07:33 (GMT+01:00)
An: Sven Achtelik <Sven.Achtelik(a)eps.aero Cc:
users(a)ovirt.org
Betreff: Re: [ovirt-users] Workflow after restoring engine from backup
On Sun, Mar 18, 2018 at 11:45 PM, Sven Achtelik <Sven.Achtelik(a)eps.aero> wr=
ote:
<head <meta http-equiv=3D"Content-Type"
content=3D"text/html; charset=3DWindows-1=
252" <meta
name=3D"Generator" content=3D"Microsoft Exchange Server" <!-- converted from text --><style><!--
.EmailQuote { margin-left: 1pt; pad=
ding-left: 4pt; border-left: #800000 2px solid; } --></style </head
<body <div
<div>Hi Didi,</div <div><br </div
<div>my backups where taken with the end. Backup utility. I have 3 Data cen=
ters, two of them with just one host and the third one with 3 hosts running=
the engine. The backup three days old, was taken on engine version 4=
.1 (4.1.7) and the restored engine is
running on 4.1.9. I have three HA VMs that would be affected. All others a=
re just normal vms. Sounds like it would be the safest to shut down the HA =
vm S to make sure that nothing happens ? Or can I disable the HA action in =
the DB for now ?</div <div><br </div
<div>Thank you,</div
<div><br </div <div>Sven</div
<div><br </div <div><br
</div <div><br </div <div
id=3D"x_composer_signature" <div
dir=3D"auto" style=3D"font-size:85%; color:#575757">Von meinem
Samsung=
Galaxy Smartphone gesendet.</div
</div <div><br </div
<div><br </div <div>-------- Urspr=FCngliche Nachricht
--------</div <div>Von: Yedidyah Bar David
&lt;didi(a)redhat.com&gt; </div
<div>Datum: 19.03.18 07:33 (GMT+01:00) </div <div>An: Sven Achtelik
&lt;Sven.Achtelik(a)eps.aero&gt; </div
<div>Cc: users(a)ovirt.org </div
<div>Betreff: Re: [ovirt-users] Workflow after restoring engine from backup=
</div <div><br </div
</div <font
size=3D"2"><span style=3D"font-size:10pt;" <div class=3D"PlainText">On Sun, Mar 18, 2018
at 11:45 PM, Sven Achtelik &l=
t;Sven.Achtelik(a)eps.aero&gt; wrote:<br >
Hi All,<br ><br ><br
><br > I had issue with the
storage that hosted my engine vm. The disk got<br=
> corrupted and I needed to restore the engine from a
backup.<br <br How did
you backup, and how did you restore?<br
<br Which version was used for
each?<br <br >
That worked as<br > expected, I just didn=92t
start the engine yet.<br <br
OK.<br <br >
I know that after the backup<br > was taken some machines
where migrated around before the engine disks<=
br > failed.<br
<br Are these machines HA?<br <br > My question is what will
happen once I start the engine service<br >
which has the restored backup on it ? Will it query the hosts for the<=
br > running VMs<br
<br It will, but HA machines are handled
differently.<br <br See
also:<br <br <a
href=3D"https://bugzilla.redhat.com/show_bug.cgi?id=3D1441322"&...
ugzilla.redhat.com/show_bug.cgi?id=3D1441322</a><br <a
href=3D"https://bugzilla.redhat.com/show_bug.cgi?id=3D1446055"&...
ugzilla.redhat.com/show_bug.cgi?id=3D1446055</a><br
<br > or will it assume that the
VMs are still on the hosts as they<br >
resided at the point of backup ?<br
<br It does, initially, but then updates
status according to what it<br gets from hosts.<br <br But polling the hosts takes time,
especially if you have many, and<br HA policy
might require faster handling. So if it polls first a<br host that
had a machine on it during backup, and sees that it's<br gone, and didn't yet poll the new host, HA handling starts
immediately,<br which eventually might lead to
starting the VM on another host.<br
<br To prevent that, the fixes to above
bugs make the restore process<br mark HA
VMs that do not have leases on the storage as "dead".<br <br > Would I need to change the
DB manual to let<br > the engine know where VMs
are up at this point ?<br <br You might
need to, if you have HA VMs and a too-old version of restore.<br <br > What will happen to HA
VMs<br > ? I feel that it might try
to start them a second time. My bigge=
st issue is<br > that I can=92t get a
service Windows to shutdown all VMs and then lat =
them<br > restart by the
engine.<br ><br ><br
><br > Is there a known workflow
for that ?<br <br I am not
aware of a tested procedure for handling above if you have<br a too-old version, but you can check the patches linked from
above bugs<br and manually run the SQL command(s)
they include. They are essentially<br comment 4
of the first bug.<br <br Good luck
and best regards,<br -- <br Didi<br
</div </span></font </body
</html
--_000_fda73b8eac2340ef927a807d4e72fbdbepsaero_--
Hi All,
I had issue with the storage that hosted my engine vm. The disk got
corrupted and I needed to restore the engine from a backup.
How did you backup, and how did you restore?
Which version was used for each?
That worked as
expected, I just didn=92t start the engine yet.
OK.
I know that after the backup
was taken some machines where migrated around before the engine disks
failed.
Are these machines HA?
My question is what will happen once I start the engine service
which has the restored backup on it ? Will it query the hosts for the
running VMs
It will, but HA machines are handled differently.
See also:
https://bugzilla.redhat.com/show_bug.cgi?id=3D1441322
https://bugzilla.redhat.com/show_bug.cgi?id=3D1446055
or will it assume that the VMs are still on the hosts as they
resided at the point of backup ?
It does, initially, but then updates status according to what it
gets from hosts.
But polling the hosts takes time, especially if you have many, and
HA policy might require faster handling. So if it polls first a
host that had a machine on it during backup, and sees that it's
gone, and didn't yet poll the new host, HA handling starts immediately,
which eventually might lead to starting the VM on another host.
To prevent that, the fixes to above bugs make the restore process
mark HA VMs that do not have leases on the storage as "dead".
Would I need to change the DB manual to let
the engine know where VMs are up at this point ?
You might need to, if you have HA VMs and a too-old version of restore.
What will happen to HA VMs
? I feel that it might try to start them a second time. My biggest issue=
is
that I can=92t get a service Windows to shutdown all VMs and then lat
the=
m
restart by the engine.
Is there a known workflow for that ?
I am not aware of a tested procedure for handling above if you have
a too-old version, but you can check the patches linked from above bugs
and manually run the SQL command(s) they include. They are essentially
comment 4 of the first bug.
Good luck and best regards,
--
Didi
--_000_fda73b8eac2340ef927a807d4e72fbdbepsaero_
Content-Type: text/html; charset="Windows-1252"
Content-Transfer-Encoding: quoted-printable
<html
5:17 a.m.
On Mon, Mar 19, 2018 at 11:03 AM, Sven Achtelik <Sven.Achtelik(a)eps.aero> wrote:
Hi Didi,
my backups where taken with the end. Backup utility. I have 3 Data centers,
two of them with just one host and the third one with 3 hosts running the
engine. The backup three days old, was taken on engine version 4.1 (4.1.7)
and the restored engine is running on 4.1.9.
Since the bug I mentioned was fixed in 4.1.3, you should be covered.
I have three HA VMs that would
be affected. All others are just normal vms. Sounds like it would be the
safest to shut down the HA vm S to make sure that nothing happens ?
If you can have downtime, I agree it sounds safer to shutdown the VMs.
Or can I
disable the HA action in the DB for now ?
No need to. If you restored with 4.1.9 engine-backup, it should have done
this for you. If you still have the restore log, you can verify this by
checking it. It should contain 'Resetting HA VM status', and then the result
of the sql that it ran.
Best regards,
Thank you,
Sven
Von meinem Samsung Galaxy Smartphone gesendet.
-------- Ursprüngliche Nachricht --------
Von: Yedidyah Bar David <didi(a)redhat.com>
Datum: 19.03.18 07:33 (GMT+01:00)
An: Sven Achtelik <Sven.Achtelik(a)eps.aero>
Cc: users(a)ovirt.org
Betreff: Re: [ovirt-users] Workflow after restoring engine from backup
On Sun, Mar 18, 2018 at 11:45 PM, Sven Achtelik <Sven.Achtelik(a)eps.aero>
wrote:
> Hi All,
>
>
>
> I had issue with the storage that hosted my engine vm. The disk got
> corrupted and I needed to restore the engine from a backup.
How did you backup, and how did you restore?
Which version was used for each?
> That worked as
> expected, I just didn’t start the engine yet.
OK.
> I know that after the backup
> was taken some machines where migrated around before the engine disks
> failed.
Are these machines HA?
> My question is what will happen once I start the engine service
> which has the restored backup on it ? Will it query the hosts for the
> running VMs
It will, but HA machines are handled differently.
See also:
https://bugzilla.redhat.com/show_bug.cgi?id=1441322
https://bugzilla.redhat.com/show_bug.cgi?id=1446055
> or will it assume that the VMs are still on the hosts as they
> resided at the point of backup ?
It does, initially, but then updates status according to what it
gets from hosts.
But polling the hosts takes time, especially if you have many, and
HA policy might require faster handling. So if it polls first a
host that had a machine on it during backup, and sees that it's
gone, and didn't yet poll the new host, HA handling starts immediately,
which eventually might lead to starting the VM on another host.
To prevent that, the fixes to above bugs make the restore process
mark HA VMs that do not have leases on the storage as "dead".
> Would I need to change the DB manual to let
> the engine know where VMs are up at this point ?
You might need to, if you have HA VMs and a too-old version of restore.
> What will happen to HA VMs
> ? I feel that it might try to start them a second time. My biggest issue
> is
> that I can’t get a service Windows to shutdown all VMs and then lat them
> restart by the engine.
>
>
>
> Is there a known workflow for that ?
I am not aware of a tested procedure for handling above if you have
a too-old version, but you can check the patches linked from above bugs
and manually run the SQL command(s) they include. They are essentially
comment 4 of the first bug.
Good luck and best regards,
--
Didi
--
Didi
3:35 a.m.
It looks like I can't get a chance to shut down the HA VMs. I check the restore log
and it did mention that it change the HA-VM entries. Just to make sure I looked at the DB
and for the vms in question it looks like this.
engine=# select vm_guid,status,vm_host,exit_status,exit_reason from vm_dynamic Where
vm_guid IN (SELECT vm_guid FROM vm_static WHERE auto_startup='t' AND lease_sd_id
is NULL);
vm_guid | status | vm_host | exit_status |
exit_reason
--------------------------------------+--------+-----------------+-------------+-------------
8733d4a6-0844-xxxx-804f-6b919e93e076 | 0 | DXXXX | 2 |
-1
4eeaa622-17f9-xxxx-b99a-cddb3ad942de | 0 | xxxxAPP | 2 | -1
fbbdc0a0-23a4-4d32-xxxx-a35c59eb790d | 0 | xxxxDB0 | 2 | -1
45a4e7ce-19a9-4db9-xxxxx-66bd1b9d83af | 0 | xxxxxWOR | 2 | -1
(4 rows)
Should that be enough to have a safe start of the engine without any HA action kicking in.
?
-----Ursprüngliche Nachricht-----
Von: Yedidyah Bar David [mailto:didi@redhat.com]
Gesendet: Montag, 19. März 2018 10:18
An: Sven Achtelik
Cc: users(a)ovirt.org
Betreff: Re: [ovirt-users] Workflow after restoring engine from backup
On Mon, Mar 19, 2018 at 11:03 AM, Sven Achtelik <Sven.Achtelik(a)eps.aero> wrote:
Hi Didi,
my backups where taken with the end. Backup utility. I have 3 Data
centers, two of them with just one host and the third one with 3 hosts
running the engine. The backup three days old, was taken on engine
version 4.1 (4.1.7) and the restored engine is running on 4.1.9.
Since the bug I mentioned was fixed in 4.1.3, you should be covered.
I have three HA VMs that would
be affected. All others are just normal vms. Sounds like it would be
the safest to shut down the HA vm S to make sure that nothing happens ?
If you can have downtime, I agree it sounds safer to shutdown the VMs.
Or can I
disable the HA action in the DB for now ?
No need to. If you restored with 4.1.9 engine-backup, it should have done this for you. If
you still have the restore log, you can verify this by checking it. It should contain
'Resetting HA VM status', and then the result of the sql that it ran.
Best regards,
Thank you,
Sven
Von meinem Samsung Galaxy Smartphone gesendet.
-------- Ursprüngliche Nachricht --------
Von: Yedidyah Bar David <didi(a)redhat.com>
Datum: 19.03.18 07:33 (GMT+01:00)
An: Sven Achtelik <Sven.Achtelik(a)eps.aero>
Cc: users(a)ovirt.org
Betreff: Re: [ovirt-users] Workflow after restoring engine from backup
On Sun, Mar 18, 2018 at 11:45 PM, Sven Achtelik
<Sven.Achtelik(a)eps.aero>
wrote:
> Hi All,
>
>
>
> I had issue with the storage that hosted my engine vm. The disk got
> corrupted and I needed to restore the engine from a backup.
How did you backup, and how did you restore?
Which version was used for each?
> That worked as
> expected, I just didn’t start the engine yet.
OK.
> I know that after the backup
> was taken some machines where migrated around before the engine disks
> failed.
Are these machines HA?
> My question is what will happen once I start the engine service which
> has the restored backup on it ? Will it query the hosts for the
> running VMs
It will, but HA machines are handled differently.
See also:
https://bugzilla.redhat.com/show_bug.cgi?id=1441322
https://bugzilla.redhat.com/show_bug.cgi?id=1446055
> or will it assume that the VMs are still on the hosts as they resided
> at the point of backup ?
It does, initially, but then updates status according to what it gets
from hosts.
But polling the hosts takes time, especially if you have many, and HA
policy might require faster handling. So if it polls first a host that
had a machine on it during backup, and sees that it's gone, and didn't
yet poll the new host, HA handling starts immediately, which
eventually might lead to starting the VM on another host.
To prevent that, the fixes to above bugs make the restore process mark
HA VMs that do not have leases on the storage as "dead".
> Would I need to change the DB manual to let the engine know where VMs
> are up at this point ?
You might need to, if you have HA VMs and a too-old version of restore.
> What will happen to HA VMs
> ? I feel that it might try to start them a second time. My biggest
> issue is that I can’t get a service Windows to shutdown all VMs and
> then lat them restart by the engine.
>
>
>
> Is there a known workflow for that ?
I am not aware of a tested procedure for handling above if you have a
too-old version, but you can check the patches linked from above bugs
and manually run the SQL command(s) they include. They are essentially
comment 4 of the first bug.
Good luck and best regards,
--
Didi
--
Didi
1:45 a.m.
On Fri, Mar 23, 2018 at 10:35 AM, Sven Achtelik <Sven.Achtelik(a)eps.aero> wrote:
It looks like I can't get a chance to shut down the HA VMs. I
check the restore log and it did mention that it change the HA-VM entries. Just to make
sure I looked at the DB and for the vms in question it looks like this.
engine=# select vm_guid,status,vm_host,exit_status,exit_reason from vm_dynamic Where
vm_guid IN (SELECT vm_guid FROM vm_static WHERE auto_startup='t' AND lease_sd_id
is NULL);
vm_guid | status | vm_host | exit_status |
exit_reason
--------------------------------------+--------+-----------------+-------------+-------------
8733d4a6-0844-xxxx-804f-6b919e93e076 | 0 | DXXXX | 2 |
-1
4eeaa622-17f9-xxxx-b99a-cddb3ad942de | 0 | xxxxAPP | 2 |
-1
fbbdc0a0-23a4-4d32-xxxx-a35c59eb790d | 0 | xxxxDB0 | 2 | -1
45a4e7ce-19a9-4db9-xxxxx-66bd1b9d83af | 0 | xxxxxWOR | 2 | -1
(4 rows)
Should that be enough to have a safe start of the engine without any HA action kicking
in. ?
Looks ok, but check also run_on_vds and migrating_to_vds. See also bz 1446055.
Best regards,
-----Ursprüngliche Nachricht-----
Von: Yedidyah Bar David [mailto:didi@redhat.com]
Gesendet: Montag, 19. März 2018 10:18
An: Sven Achtelik
Cc: users(a)ovirt.org
Betreff: Re: [ovirt-users] Workflow after restoring engine from backup
On Mon, Mar 19, 2018 at 11:03 AM, Sven Achtelik <Sven.Achtelik(a)eps.aero> wrote:
> Hi Didi,
>
> my backups where taken with the end. Backup utility. I have 3 Data
> centers, two of them with just one host and the third one with 3 hosts
> running the engine. The backup three days old, was taken on engine
> version 4.1 (4.1.7) and the restored engine is running on 4.1.9.
Since the bug I mentioned was fixed in 4.1.3, you should be covered.
> I have three HA VMs that would
> be affected. All others are just normal vms. Sounds like it would be
> the safest to shut down the HA vm S to make sure that nothing happens ?
If you can have downtime, I agree it sounds safer to shutdown the VMs.
> Or can I
> disable the HA action in the DB for now ?
No need to. If you restored with 4.1.9 engine-backup, it should have done this for you.
If you still have the restore log, you can verify this by checking it. It should contain
'Resetting HA VM status', and then the result of the sql that it ran.
Best regards,
>
> Thank you,
>
> Sven
>
>
>
> Von meinem Samsung Galaxy Smartphone gesendet.
>
>
> -------- Ursprüngliche Nachricht --------
> Von: Yedidyah Bar David <didi(a)redhat.com>
> Datum: 19.03.18 07:33 (GMT+01:00)
> An: Sven Achtelik <Sven.Achtelik(a)eps.aero>
> Cc: users(a)ovirt.org
> Betreff: Re: [ovirt-users] Workflow after restoring engine from backup
>
> On Sun, Mar 18, 2018 at 11:45 PM, Sven Achtelik
> <Sven.Achtelik(a)eps.aero>
> wrote:
>> Hi All,
>>
>>
>>
>> I had issue with the storage that hosted my engine vm. The disk got
>> corrupted and I needed to restore the engine from a backup.
>
> How did you backup, and how did you restore?
>
> Which version was used for each?
>
>> That worked as
>> expected, I just didn’t start the engine yet.
>
> OK.
>
>> I know that after the backup
>> was taken some machines where migrated around before the engine disks
>> failed.
>
> Are these machines HA?
>
>> My question is what will happen once I start the engine service which
>> has the restored backup on it ? Will it query the hosts for the
>> running VMs
>
> It will, but HA machines are handled differently.
>
> See also:
>
> https://bugzilla.redhat.com/show_bug.cgi?id=1441322
> https://bugzilla.redhat.com/show_bug.cgi?id=1446055
>
>> or will it assume that the VMs are still on the hosts as they resided
>> at the point of backup ?
>
> It does, initially, but then updates status according to what it gets
> from hosts.
>
> But polling the hosts takes time, especially if you have many, and HA
> policy might require faster handling. So if it polls first a host that
> had a machine on it during backup, and sees that it's gone, and didn't
> yet poll the new host, HA handling starts immediately, which
> eventually might lead to starting the VM on another host.
>
> To prevent that, the fixes to above bugs make the restore process mark
> HA VMs that do not have leases on the storage as "dead".
>
>> Would I need to change the DB manual to let the engine know where VMs
>> are up at this point ?
>
> You might need to, if you have HA VMs and a too-old version of restore.
>
>> What will happen to HA VMs
>> ? I feel that it might try to start them a second time. My biggest
>> issue is that I can’t get a service Windows to shutdown all VMs and
>> then lat them restart by the engine.
>>
>>
>>
>> Is there a known workflow for that ?
>
> I am not aware of a tested procedure for handling above if you have a
> too-old version, but you can check the patches linked from above bugs
> and manually run the SQL command(s) they include. They are essentially
> comment 4 of the first bug.
>
> Good luck and best regards,
> --
> Didi
--
Didi
--
Didi
3:56 a.m.
I did look at this, for the VMs in question there are no entries on the run_on_vds and
migrating_to_vds fields. I'm thinking of giving this a try.
-----Ursprüngliche Nachricht-----
Von: Yedidyah Bar David [mailto:didi@redhat.com]
Gesendet: Sonntag, 25. März 2018 07:46
An: Sven Achtelik
Cc: users(a)ovirt.org
Betreff: Re: [ovirt-users] Workflow after restoring engine from backup
On Fri, Mar 23, 2018 at 10:35 AM, Sven Achtelik <Sven.Achtelik(a)eps.aero> wrote:
It looks like I can't get a chance to shut down the HA VMs. I
check the restore log and it did mention that it change the HA-VM entries. Just to make
sure I looked at the DB and for the vms in question it looks like this.
engine=# select vm_guid,status,vm_host,exit_status,exit_reason from vm_dynamic Where
vm_guid IN (SELECT vm_guid FROM vm_static WHERE auto_startup='t' AND lease_sd_id
is NULL);
vm_guid | status | vm_host | exit_status |
exit_reason
--------------------------------------+--------+-----------------+-------------+-------------
8733d4a6-0844-xxxx-804f-6b919e93e076 | 0 | DXXXX | 2 |
-1
4eeaa622-17f9-xxxx-b99a-cddb3ad942de | 0 | xxxxAPP | 2 |
-1
fbbdc0a0-23a4-4d32-xxxx-a35c59eb790d | 0 | xxxxDB0 | 2 | -1
45a4e7ce-19a9-4db9-xxxxx-66bd1b9d83af | 0 | xxxxxWOR | 2 | -1
(4 rows)
Should that be enough to have a safe start of the engine without any HA action kicking
in. ?
Looks ok, but check also run_on_vds and migrating_to_vds. See also bz 1446055.
Best regards,
-----Ursprüngliche Nachricht-----
Von: Yedidyah Bar David [mailto:didi@redhat.com]
Gesendet: Montag, 19. März 2018 10:18
An: Sven Achtelik
Cc: users(a)ovirt.org
Betreff: Re: [ovirt-users] Workflow after restoring engine from backup
On Mon, Mar 19, 2018 at 11:03 AM, Sven Achtelik <Sven.Achtelik(a)eps.aero> wrote:
> Hi Didi,
>
> my backups where taken with the end. Backup utility. I have 3 Data
> centers, two of them with just one host and the third one with 3
> hosts running the engine. The backup three days old, was taken on
> engine version 4.1 (4.1.7) and the restored engine is running on 4.1.9.
Since the bug I mentioned was fixed in 4.1.3, you should be covered.
> I have three HA VMs that would
> be affected. All others are just normal vms. Sounds like it would be
> the safest to shut down the HA vm S to make sure that nothing happens ?
If you can have downtime, I agree it sounds safer to shutdown the VMs.
> Or can I
> disable the HA action in the DB for now ?
No need to. If you restored with 4.1.9 engine-backup, it should have done this for you.
If you still have the restore log, you can verify this by checking it. It should contain
'Resetting HA VM status', and then the result of the sql that it ran.
Best regards,
>
> Thank you,
>
> Sven
>
>
>
> Von meinem Samsung Galaxy Smartphone gesendet.
>
>
> -------- Ursprüngliche Nachricht --------
> Von: Yedidyah Bar David <didi(a)redhat.com>
> Datum: 19.03.18 07:33 (GMT+01:00)
> An: Sven Achtelik <Sven.Achtelik(a)eps.aero>
> Cc: users(a)ovirt.org
> Betreff: Re: [ovirt-users] Workflow after restoring engine from
> backup
>
> On Sun, Mar 18, 2018 at 11:45 PM, Sven Achtelik
> <Sven.Achtelik(a)eps.aero>
> wrote:
>> Hi All,
>>
>>
>>
>> I had issue with the storage that hosted my engine vm. The disk got
>> corrupted and I needed to restore the engine from a backup.
>
> How did you backup, and how did you restore?
>
> Which version was used for each?
>
>> That worked as
>> expected, I just didn’t start the engine yet.
>
> OK.
>
>> I know that after the backup
>> was taken some machines where migrated around before the engine
>> disks failed.
>
> Are these machines HA?
>
>> My question is what will happen once I start the engine service
>> which has the restored backup on it ? Will it query the hosts for
>> the running VMs
>
> It will, but HA machines are handled differently.
>
> See also:
>
> https://bugzilla.redhat.com/show_bug.cgi?id=1441322
> https://bugzilla.redhat.com/show_bug.cgi?id=1446055
>
>> or will it assume that the VMs are still on the hosts as they
>> resided at the point of backup ?
>
> It does, initially, but then updates status according to what it gets
> from hosts.
>
> But polling the hosts takes time, especially if you have many, and HA
> policy might require faster handling. So if it polls first a host
> that had a machine on it during backup, and sees that it's gone, and
> didn't yet poll the new host, HA handling starts immediately, which
> eventually might lead to starting the VM on another host.
>
> To prevent that, the fixes to above bugs make the restore process
> mark HA VMs that do not have leases on the storage as "dead".
>
>> Would I need to change the DB manual to let the engine know where
>> VMs are up at this point ?
>
> You might need to, if you have HA VMs and a too-old version of restore.
>
>> What will happen to HA VMs
>> ? I feel that it might try to start them a second time. My biggest
>> issue is that I can’t get a service Windows to shutdown all VMs and
>> then lat them restart by the engine.
>>
>>
>>
>> Is there a known workflow for that ?
>
> I am not aware of a tested procedure for handling above if you have a
> too-old version, but you can check the patches linked from above bugs
> and manually run the SQL command(s) they include. They are
> essentially comment 4 of the first bug.
>
> Good luck and best regards,
> --
> Didi
--
Didi
--
Didi
2463
days inactive
2472
days old
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Yedidyah Bar David