Unable to enable HA on a XCP-ng 8.2.1 Compute Pool

Denson

@olivierlambert The pool is showing all hosts as connected, same for all the shared SRs. There are even vms running on the new compute host. Only thing not working is enabling HA.
One of the SRs is showing that HA is configured. Should that be the case when HA is not enabled yet?

olivierlambert

This only shows which SR will be used with HA, nothing more.

The issue seems to come from the host "compute-04" when it's trying to enable HA. I would check this host log more in details.

Denson

@olivierlambert Notable error on that compute is that it can't find the UUID of the pool master, for some reason.

Mar 13 14:12:00 compute-04 xapi: [error||16119 HTTPS 172.21.17.96->:::80|host.ha_join_liveset R:c44ae729771f|xapi_ha] Failed to find the UUID address of host with address 172.21.18.96
Mar 13 14:12:00 compute-04 xapi: [error||16119 :::80||backtrace] host.ha_join_liveset R:c44ae729771f failed with exception Not_found
Mar 13 14:12:00 compute-04 xapi: [error||16119 :::80||backtrace] 1/12 xapi Raised at file hashtbl.ml, line 194

172.21.17.96 is the management IP of the pool master(compute-01) while 172.21.18.96 is the IP for the same host, used as a Storage interface.

olivierlambert

On this problematic host, can you do a simple command like "xe vm-list"? Does it work?

tjkreidl

@Denson Are all hosts properly time synchronized to NTP? Make sure they are all within reasonable limits of each other.
Might be a network thing -- are all interfaces configured alike on all hosts? Can the hosts all ping each other?

Denson

@olivierlambert Yes. xe vm-list shows all the running vms on the pool

Denson

@tjkreidl ntp is synchronized across all the hosts. All the hosts can reach each other and are in a pool already. There are even vms running properly on the said compute. The only thing not working is enabling HA.

tjkreidl

@Denson When you enable HA, note that the host has to be rebooted for HA to take effect. Was that the case?

Denson

@tjkreidl which host? Enabling HA on other pools doesn't trigger any host reboot.
Enabling HA on this pool results in "Internal_Error(Not_found)"
I am aware that a host reboots when you remove it from a compute pool but that is something separate.

tjkreidl

@Denson After enabling HA, the host has to be manually rebooted, which I think you're already aware of.
OK, well, that leaves pretty much a network issue. Hmm. The statefile created OK on the shared SR within the pool?
The "not found" error message doesn't give you much to go on, unfortunately.