Hi Nux and Wei, We got the 5 minutes by:
(1) Killing the Server Power <- Time Start (2) When Cloudstack shows the Host is Offline <- Time Stop So this is what makes us think that 5 minutes for cloudstack to even detect that the host is down takes a long time. However, we notice as well that the moment Cloudstack Detects the host is down, all the VMs have already moved to other hosts. So in this case, if 2 minutes is not enough, what is the general rule of thumb? Regards, Bryan On 24 Jan 2024 at 5:16 PM +0800, Nux <[email protected]>, wrote: > When dealing with these timeouts, try not to be too stingy with the > values. > 2 minutes may not be enough for other timeouts in your infra to complete > so that the whole process happens gracefully. > Whoever thought of 5 minutes as default must have had serious > considerations. > > On 2024-01-24 09:02, Wei ZHOU wrote: > > Hi, > > > > You can change the global setting "ping.interval" to 10 (seconds), > > restart > > the management service, and retest. > > > > -Wei > > > > On Wed, 24 Jan 2024 at 09:41, Bryan Tiang <[email protected]> > > wrote: > > > > > Hi Community, > > > > > > We are performing failover test to see how quickly a VM will failover > > > to > > > another compute node in the event of a compute node hardware failure. > > > > > > We forcefully power off the compute node where the VM is residing and > > > monitor how long it takes to failover, and after a few tests the > > > result is > > > averagely around 5 mins for the compute node to be declared down and > > > for > > > the VM to failover to another node. > > > > > > Referring to > > > https://cwiki.apache.org/confluence/display/cloudstack/host+ha, we've > > > made a few changes in global settings hoping we can shorten the total > > > time > > > needed to failover but it doesn’t seem to work. > > > > > > We're wondering which settings that will effectively achieve our > > > objective, we're looking at around 2 mins total for failover to > > > complete. > > > > > > We are using Cloudstack 4.18.1 + Linstor + KVM Ubuntu > > > > > > Regards, > > > Bryan > > >
