Hi, I want to know more about the Ovirt engine and host node heartbeat settings and interval....that means how and when the engine node consider the host node as dead or shoot the command to fence it for reboot.... Is there any way to modify those interval and settings to prevent the false-positive etc... Thanks, Punit
Can anyone help me here ?? On Mon, Dec 15, 2014 at 4:37 PM, Punit Dambiwal <hypunit@gmail.com> wrote:
Hi,
I want to know more about the Ovirt engine and host node heartbeat settings and interval....that means how and when the engine node consider the host node as dead or shoot the command to fence it for reboot....
Is there any way to modify those interval and settings to prevent the false-positive etc...
Thanks, Punit
Hi, not sure if I understand correctly. Do you want to know the timeout after the host will be considered non responsive and fencing will be executed on it? If so please take a look at those: http://www.ovirt.org/Automatic_Fencing http://www.ovirt.org/Fence_kdump#Fencing_flow_with_fence_kdump It's quite a complex part of engine so feel free to ask Thanks Martin ----- Original Message -----
From: "Punit Dambiwal" <hypunit@gmail.com> To: users@ovirt.org, "Dan Kenigsberg" <danken@redhat.com>, "Itamar Heim" <iheim@redhat.com> Sent: Monday, December 15, 2014 9:37:47 AM Subject: [ovirt-users] Ovirt Node Heartbeat Settings
Hi,
I want to know more about the Ovirt engine and host node heartbeat settings and interval....that means how and when the engine node consider the host node as dead or shoot the command to fence it for reboot....
Is there any way to modify those interval and settings to prevent the false-positive etc...
Thanks, Punit
_______________________________________________ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users
Hi Martin, Yes...I want to know the timeout after the host will be considered non responsive and fencing will be executed on it ?? can it be modify ?? if yes...please suggest me know the way to do this ?? Thanks, Punit On Tue, Dec 16, 2014 at 2:50 PM, Martin Perina <mperina@redhat.com> wrote:
Hi,
not sure if I understand correctly. Do you want to know the timeout after the host will be considered non responsive and fencing will be executed on it? If so please take a look at those:
http://www.ovirt.org/Automatic_Fencing http://www.ovirt.org/Fence_kdump#Fencing_flow_with_fence_kdump
It's quite a complex part of engine so feel free to ask
Thanks
Martin
----- Original Message -----
From: "Punit Dambiwal" <hypunit@gmail.com> To: users@ovirt.org, "Dan Kenigsberg" <danken@redhat.com>, "Itamar Heim" <iheim@redhat.com> Sent: Monday, December 15, 2014 9:37:47 AM Subject: [ovirt-users] Ovirt Node Heartbeat Settings
Hi,
I want to know more about the Ovirt engine and host node heartbeat settings and interval....that means how and when the engine node consider the host node as dead or shoot the command to fence it for reboot....
Is there any way to modify those interval and settings to prevent the false-positive etc...
Thanks, Punit
_______________________________________________ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users
----- Original Message -----
From: "Punit Dambiwal" <hypunit@gmail.com> To: "Martin Perina" <mperina@redhat.com> Cc: users@ovirt.org, "Dan Kenigsberg" <danken@redhat.com>, "Itamar Heim" <iheim@redhat.com> Sent: Tuesday, December 16, 2014 9:13:24 AM Subject: Re: [ovirt-users] Ovirt Node Heartbeat Settings
Hi Martin,
Yes...I want to know the timeout after the host will be considered non responsive and fencing will be executed on it ?? can it be modify ?? if yes...please suggest me know the way to do this ??
Please take a look at calculation in http://www.ovirt.org/Automatic_Fencing#Automatic_Fencing Host status will to Non Responding if either number of unsuccessful connection attempts exceeds VDSAttemptsToResetCount or timeout from last successful connection is expired. To alter time for host to be fence you can change these values from above mentioned calculation can be changed using engine-config tool: VDSAttemptsToResetCount TimeoutToResetVdsInSeconds DelayResetPerVmInSeconds DelayResetForSpmInSeconds Is there any specific issue for which you need to change those values? Martin
Thanks, Punit
On Tue, Dec 16, 2014 at 2:50 PM, Martin Perina <mperina@redhat.com> wrote:
Hi,
not sure if I understand correctly. Do you want to know the timeout after the host will be considered non responsive and fencing will be executed on it? If so please take a look at those:
http://www.ovirt.org/Automatic_Fencing http://www.ovirt.org/Fence_kdump#Fencing_flow_with_fence_kdump
It's quite a complex part of engine so feel free to ask
Thanks
Martin
----- Original Message -----
From: "Punit Dambiwal" <hypunit@gmail.com> To: users@ovirt.org, "Dan Kenigsberg" <danken@redhat.com>, "Itamar Heim" <iheim@redhat.com> Sent: Monday, December 15, 2014 9:37:47 AM Subject: [ovirt-users] Ovirt Node Heartbeat Settings
Hi,
I want to know more about the Ovirt engine and host node heartbeat settings and interval....that means how and when the engine node consider the host node as dead or shoot the command to fence it for reboot....
Is there any way to modify those interval and settings to prevent the false-positive etc...
Thanks, Punit
_______________________________________________ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users
Hi Martin, Yes...sometime the engine through the message in the event tab that host not responding...but actually it's working fine....because of the engine consider it as not responding...fence it....as i am using compute and storage on the same node (glusterfs)...it cause me serious downtime in the production... Thanks, Punit On Tue, Dec 16, 2014 at 4:51 PM, Martin Perina <mperina@redhat.com> wrote:
----- Original Message -----
From: "Punit Dambiwal" <hypunit@gmail.com> To: "Martin Perina" <mperina@redhat.com> Cc: users@ovirt.org, "Dan Kenigsberg" <danken@redhat.com>, "Itamar Heim" <iheim@redhat.com> Sent: Tuesday, December 16, 2014 9:13:24 AM Subject: Re: [ovirt-users] Ovirt Node Heartbeat Settings
Hi Martin,
Yes...I want to know the timeout after the host will be considered non responsive and fencing will be executed on it ?? can it be modify ?? if yes...please suggest me know the way to do this ??
Please take a look at calculation in
http://www.ovirt.org/Automatic_Fencing#Automatic_Fencing
Host status will to Non Responding if either number of unsuccessful connection attempts exceeds VDSAttemptsToResetCount or timeout from last successful connection is expired.
To alter time for host to be fence you can change these values from above mentioned calculation can be changed using engine-config tool:
VDSAttemptsToResetCount TimeoutToResetVdsInSeconds DelayResetPerVmInSeconds DelayResetForSpmInSeconds
Is there any specific issue for which you need to change those values?
Martin
Thanks, Punit
On Tue, Dec 16, 2014 at 2:50 PM, Martin Perina <mperina@redhat.com>
wrote:
Hi,
not sure if I understand correctly. Do you want to know the timeout
after
the host will be considered non responsive and fencing will be executed on it? If so please take a look at those:
http://www.ovirt.org/Automatic_Fencing http://www.ovirt.org/Fence_kdump#Fencing_flow_with_fence_kdump
It's quite a complex part of engine so feel free to ask
Thanks
Martin
----- Original Message -----
From: "Punit Dambiwal" <hypunit@gmail.com> To: users@ovirt.org, "Dan Kenigsberg" <danken@redhat.com>, "Itamar Heim" <iheim@redhat.com> Sent: Monday, December 15, 2014 9:37:47 AM Subject: [ovirt-users] Ovirt Node Heartbeat Settings
Hi,
I want to know more about the Ovirt engine and host node heartbeat settings and interval....that means how and when the engine node consider the host node as dead or shoot the command to fence it for reboot....
Is there any way to modify those interval and settings to prevent the false-positive etc...
Thanks, Punit
_______________________________________________ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users
Hi Punit, if you are using oVirt 3.5, there are 3 new options which could help hosts not to be fenced. In cluster detail dialog there's new tab Fencing Policy with 3 new options: 1. Enable Fencing - this option if unchecked disables fencing for all hosts in cluster - but this should be used with caution, it should be turned off only, if you are expecting some networking problems between engine and hosts (such as router problems, ...). Because if you disable fencing and host will be marked as Non Responsible, HA VMs won't be restarted on new host - this option (if unchecked) also disables further options 2. Skip fencing if host has live lease on storage - this option if checked will skip fencing of host if host is connected to storage (to be precise if the host renews its storage lease in the last 90 seconds, by default each host should renew its storage lease every 60 seconds) 3. Skip fencing if cluster networking in unstable - this options if checked will skip fencing of host if amount of hosts in state Connection or Non Responsive in cluster is higher than selected amount in percents So I think option 2 is best solution for your issue. Martin ----- Original Message -----
From: "Punit Dambiwal" <hypunit@gmail.com> To: "Martin Perina" <mperina@redhat.com> Cc: users@ovirt.org, "Dan Kenigsberg" <danken@redhat.com>, "Itamar Heim" <iheim@redhat.com> Sent: Wednesday, December 17, 2014 3:05:25 AM Subject: Re: [ovirt-users] Ovirt Node Heartbeat Settings
Hi Martin,
Yes...sometime the engine through the message in the event tab that host not responding...but actually it's working fine....because of the engine consider it as not responding...fence it....as i am using compute and storage on the same node (glusterfs)...it cause me serious downtime in the production...
Thanks, Punit
On Tue, Dec 16, 2014 at 4:51 PM, Martin Perina <mperina@redhat.com> wrote:
----- Original Message -----
From: "Punit Dambiwal" <hypunit@gmail.com> To: "Martin Perina" <mperina@redhat.com> Cc: users@ovirt.org, "Dan Kenigsberg" <danken@redhat.com>, "Itamar Heim" <iheim@redhat.com> Sent: Tuesday, December 16, 2014 9:13:24 AM Subject: Re: [ovirt-users] Ovirt Node Heartbeat Settings
Hi Martin,
Yes...I want to know the timeout after the host will be considered non responsive and fencing will be executed on it ?? can it be modify ?? if yes...please suggest me know the way to do this ??
Please take a look at calculation in
http://www.ovirt.org/Automatic_Fencing#Automatic_Fencing
Host status will to Non Responding if either number of unsuccessful connection attempts exceeds VDSAttemptsToResetCount or timeout from last successful connection is expired.
To alter time for host to be fence you can change these values from above mentioned calculation can be changed using engine-config tool:
VDSAttemptsToResetCount TimeoutToResetVdsInSeconds DelayResetPerVmInSeconds DelayResetForSpmInSeconds
Is there any specific issue for which you need to change those values?
Martin
Thanks, Punit
On Tue, Dec 16, 2014 at 2:50 PM, Martin Perina <mperina@redhat.com>
wrote:
Hi,
not sure if I understand correctly. Do you want to know the timeout
after
the host will be considered non responsive and fencing will be executed on it? If so please take a look at those:
http://www.ovirt.org/Automatic_Fencing http://www.ovirt.org/Fence_kdump#Fencing_flow_with_fence_kdump
It's quite a complex part of engine so feel free to ask
Thanks
Martin
----- Original Message -----
From: "Punit Dambiwal" <hypunit@gmail.com> To: users@ovirt.org, "Dan Kenigsberg" <danken@redhat.com>, "Itamar Heim" <iheim@redhat.com> Sent: Monday, December 15, 2014 9:37:47 AM Subject: [ovirt-users] Ovirt Node Heartbeat Settings
Hi,
I want to know more about the Ovirt engine and host node heartbeat settings and interval....that means how and when the engine node consider the host node as dead or shoot the command to fence it for reboot....
Is there any way to modify those interval and settings to prevent the false-positive etc...
Thanks, Punit
_______________________________________________ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users
participants (2)
-
Martin Perina -
Punit Dambiwal