Hi,
Thanks for the update Simon, Boris.
I will check the mentioned URLs.
-Kurt
On 05/15/2017 08:48 PM, Boris Stoyanov wrote:
Hi Kurt,
Earlier this ear we’ve worked on KVM Host-HA feature which basically offers a
proper fencing for ipmi 2.0 compliant hosts and works with VM-ha as well, so if
you have a failed host or even shut down the Host-HA framework will try to
recover it and if it fail will fencing (issue IPMI off command ) and obviously
VMs will be migrated to healthy host.
Have a look here: https://github.com/apache/cloudstack/pull/1960
FS: https://cwiki.apache.org/confluence/display/CLOUDSTACK/Host+HA
By the way it’s one of the talks at ApacheCon this week.
Boris Stoyanov
[email protected]
www.shapeblue.com
53 Chandos Place, Covent Garden, London WC2N 4HSUK
@shapeblue
On May 15, 2017, at 8:39 AM, Simon Weller
<[email protected]<mailto:[email protected]>> wrote:
Kurt,
By default, ACS will not HA VMs due to a host failure, as ACS assumes the
storage could still be mounted (machine isn't cleanly fenced off). Deleting the
host from ACS should trigger a failover of the VMs. There's a lot of work in
progress to deal with this a lot more gracefully. A few folks have written
out-of-band applications that watch the logs via a queue (e.g. RabbitMQ) and on
host failover use an api call to remove/disable the hosts to force the VMs to
be restarted on another host.
- Si
________________________________
From: Kurt K <[email protected]<mailto:[email protected]>>
Sent: Saturday, May 13, 2017 2:38 AM
To: [email protected]<mailto:[email protected]>
Subject: Cloudstack High Availability(HA) Testing
Hi There,
We are in the middle of some confusion regarding Cloustack High
Availability(HA) testing. In our deployment, we have used 2 hypervisor
kvm servers. We have created a VM with HA compute offering in
hypervisor2 server and then we have enabled maintenance mode on
hypervisor2. After that the VM's are online from hypervisor1 server. But
when we bring down the hypervisor2 server forcefully, the Vm's are not
online from hypervisor1 server. We need help/suggestions on this.
We are using below stack versions on all of our servers.
====
Cloudstack - 4.6.0
CentOS - 7.3
====
Also both hypervisors are in same cluster.
Please shed some lights to us.
-Kurt
