Hi Sai
You ca trigger kernel panic on the host via the following command echo c > /proc/sysrq-trigger or https://linuxconfig.org/how-to-crash-your-linux-system-with-fork-bomb Regards Kiran From: S.Fuller <steveful...@gmail.com> Date: Friday, 24 January 2025 at 1:05 AM To: users@cloudstack.apache.org <users@cloudstack.apache.org> Subject: Re: KVM Host HA Sai, NFSv3 should be fine for configuring Host HA. On Thu, Jan 23, 2025 at 9:14 AM sai <sai.kr...@gmail.com> wrote: > Hi Kiran, > > Thank you so much for your help, I will configure these settings and let > you know, and also can you please let me know the NFS version you have used > and rhel version and the command you used or steps to panic host or how did > you power off the host. Please help me in these details as well. > > Thanks, > Sai > > On Thu, Jan 23, 2025, 3:12 AM Kiran Chavala <kiran.chav...@shapeblue.com> > wrote: > > > > > > > Hi Sai > > > > Could you please let me know the values you have configured for the > > following global settings. > > > > I have used the following values and KVM host ha is working fine. > > > > Also can you check by executing the following api > > > > > > > https://cloudstack.apache.org/api/apidocs-4.20/apis/issueOutOfBandManagementPowerAction.html > > > > The ipmi tool on management server should restart the host > > > > ipmitool [options] power cycle > > ipmitool -I lanplus -U admin -P password -H 127.0.0.1 power status > > > > > > Global settings > > > > > > ("kvm.ha.activity.check.failure.ratio", "0.6") > > ("kvm.ha.activity.check.interval", "8") > > ("kvm.ha.activity.check.max.attempts", "5") > > ("kvm.ha.activity.check.timeout", "30") > > ("kvm.ha.degraded.max.period", "30") > > ("kvm.ha.fence.timeout", "30") > > ("kvm.ha.health.check.timeout", "30") > > ("kvm.ha.recover.failure.threshold", "2") > > ("kvm.ha.recover.timeout", "30") > > ("kvm.ha.recover.wait.period", "30") > > > > > > Regards > > Kiran > > > > > > From: sai <sai.kr...@gmail.com> > > Date: Monday, 20 January 2025 at 9:43 PM > > To: users@cloudstack.apache.org <users@cloudstack.apache.org> > > Subject: Re: KVM Host HA > > Hi, > > > > > > Yes, can you please elaborate on the statement "Host HA is known to break > > VM HA". I have tried multiple times HA state is in degraded state on > kernel > > panic and vm never get migrated and HA doesn't change from degraded > state. > > > > > > Thanks, > > Sai > > > > On Thu, Jan 16, 2025, 12:26 PM S.Fuller <steveful...@gmail.com> wrote: > > > > > Nux, > > > > > > Can you elaborate on your statement "Host HA is known to break VM HA" ? > > > > > > Thanks > > > > > > Steve > > > > > > On Thu, Jan 9, 2025 at 5:01 PM Nux <n...@li.nux.ro> wrote: > > > > > > > Host HA is known to break VM HA. > > > > Disable Host HA, possibly even oobm and try again. > > > > > > > > NFS is a requirement for VM HA, so make sure you keep that. > > > > > > > > On 2025-01-09 20:44, sai wrote: > > > > > Hi All, > > > > > > > > > > In my CS I have enabled VM HA, Host HA and configured oobm as well > > and > > > > > using nfs storage. I am testing HA and I powered off the Host after > > few > > > > > minutes the Host went into " Down" state and didn't come back to > > normal > > > > > state after several minutes but vm present on the host is in > running > > > > > state. > > > > > Is this expected behaviour. Can someone please help me on this, > this > > is > > > > > the > > > > > first time I am trying to setup and verify HA in my environment. > Also > > > > > can > > > > > someone share any documents on how to test HA and it's expected > > > > > behaviour > > > > > if any. > > > > > > > > > > Regards, > > > > > Sai > > > > > > > > > > > > > -- > > > Steve Fuller > > > steveful...@gmail.com > > > > > > > > > > > > -- Steve Fuller steveful...@gmail.com
