Hi, Thank you very much for your reply. I would like to know in which cases HA will happen? 1. network failure? ( i.e , if we accidentally remove the network cable or if network card stopped working due to some reasons. ) 2. Server is suddenly shut-down due to power failure (i.e - NOT a proper shut-down ) or due to server Hardware failure such as motherboard or processor. 3. accidental reboot ? WILL HA will happen when above mentioned things happen? YES or NO? Hope to hear from you? On Tue, Oct 13, 2015 at 7:33 PM, Eli Mesika <emesika@redhat.com> wrote:
From: "Indunil Jayasooriya" <indunil75@gmail.com> To: users@ovirt.org Sent: Tuesday, October 13, 2015 6:13:22 AM Subject: [ovirt-users] oVirt - High Availability
Hi users,
I have setup OVIRT 3.5 with 2 REDHAT 7.1 hosts. Everything is ok other
----- Original Message ----- than
HA ( High Availability). To test HA, Documentation says, Power Management is needed.
Could you pls let me know if this Power Management is a separate Device or does it come with a BRANDED Server such as HP, IBM or Dell?
PM can be implemented by a separate card or come as part of a BRANDED Server such as HP, IBM or Dell.
I have seen a ILO port in HP servers. Can I use it for HA ( High Availability) in ovirt?
Yes you can, ILO is one of the PM devices supported by oVirt
If power management is present in Branded Servers , Could you pls let me
know
some Branded RHEL 7.1/CentOS 7.1 supported servers?
Then, I can use it for Production use.
This is an YOU TUBE video for HA.
https://www.youtube.com/watch?v=uHCnXGUMaS0
Is this a correct video for HA?
Please see also https://www.youtube.com/watch?v=IuRPGU7nF1E
I did some research.
a few URLs.
http://lists.ovirt.org/pipermail/users/2013-January/011519.html
http://www.ovirt.org/OVirt_Administration_Guide#Host_Resilience
https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Virtualizat...
what is Soft-Fencing Hosts ? ovirt doc gives below . ( http://www.ovirt.org/OVirt_Administration_Guide#Host_Resilience )
Soft-Fencing Hosts
Sometimes a host becomes non-responsive due to an unexpected problem, and though VDSM is unable to respond to requests, the virtual machines that depend upon VDSM remain alive and accessible. In these situations, restarting VDSM returns VDSM to a responsive state and resolves this
issue.
oVirt 3.3 introduces "soft-fencing over SSH". Prior to oVirt 3.3, non-responsive hosts were fenced only by external fencing devices. In
oVirt
3.3, the fencing process has been expanded to include "SSH Soft Fencing", a process whereby oVirt attempts to restart VDSM via SSH on non-responsive hosts. If oVirt fails to restart VDSM via SSH, the responsibility for fencing falls to the external fencing agent if an external fencing agent has been configured.
BUT, It does NOT say how to set it up?
is there any step by step doc for it?
There is no need to set it up, soft-fencing is simply VDSM service restart on the server side and is done always whether you configured PM on the host or not as a first step when you host is not-responding
HOPE TO hear from you?
-- cat /etc/motd
Thank you Indunil Jayasooriya http://www.theravadanet.net/ http://www.siyabas.lk/sinhala_how_to_install.html - Download Sinhala
Fonts
_______________________________________________ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users
-- cat /etc/motd Thank you Indunil Jayasooriya http://www.theravadanet.net/ http://www.siyabas.lk/sinhala_how_to_install.html - Download Sinhala Fonts