Re: [Engine-devel] SSH Soft Fencing
----- Original Message -----
From: "Martin Perina" <mperina(a)redhat.com>
To: engine-devel(a)ovirt.org
Cc: "Yair Zaslavsky" <yzaslavs(a)redhat.com>, "Barak Azulay"
<bazulay(a)redhat.com>, "Eli Mesika" <emesika(a)redhat.com>
Sent: Thursday, June 27, 2013 1:51:06 PM
Subject: SSH Soft Fencing
Hi,
SSH Soft Fencing is a new feature for 3.3 and it tries to restart VDSM
using SSH connection on non responsive hosts prior to real fencing.
More info can be found at
http://www.ovirt.org/Automatic_Fencing#Automatic_Fencing_in_oVirt_3.3
In current SSH Soft Fencing implementation the restart VDSM using SSH
command is part of standard fencing implementation in
VdsNotRespondingTreatmentCommand. But this command is executed only
if a host has a valid PM configuration. If host doesn't have a valid
PM configuration, the execution of the command is disabled and host
state is change to Non Responsive.
So my question are:
1) Should SSH Soft Fencing be executed on hosts without valid PM
configuration?
I think that the answer should be yes. The vdsm restart will solve most of problems , so
why not using it whether a PM agent is defined or not.
2) Should VDSM restart using SSH command be reimplemented
as standalone command to be usable also in other parts of engine?
If 1) is true, I think it will have to be done anyway.
+1
Martin Perina