@olivierlambert

Any possibility (practical benefit) of enabling HA for VMs (using Shared Storage) but not for the xcp-ng master ? will that work ? Or would I need to enable HA for XCP-NG pool master also ?

You are right. I had a misconception as I thought when I add a 'Server' to Server Section in XO, it individually creates a connection to all Servers directly (since it takes username and password individually for each server)

Hence I thought it would still be able to communicate to slaves using the supplied password.

Which brings me to a question : If a particular VM is configured as HA and is running on the Master Node, How will it shift to a slave node when Master goes down ? Or am I missing something here ?

Am new to XCP and have only recently started testing this.

I must stay I am amazed by such a friendly community and a blazingly fast response !

Thank you sooo much for a quick reply !

For promotion, shouldn't XO actually show an option to promote the slave to master ? (I guess the GUI is not built yet)

If all the slaves disappear, then the only option would be to SSH into a slave and promote it using CLI. Isn't it ?

Re: Pool Master down - What happens?

With reference to the above topic, shouldn't the other pool members be visible in XO (which has been installed from Source) ?

When I give reboot command to the Dom0 Master, the whole Pool becomes invisible to XO. (i.e. I am also not able to see other hosts which were not rebooted)
When the Master comes back online, the pool is visible again.

Version : XCP-NG 8.3 Alpha
XO Version : xo-server 5.109.0 / xo-web 5.111.0 (Created from Source)

Update : SSH directly to slave node works, but XO removes all the servers in the pool from Server list also. (The list is restored as soon as master comes back)

PS: This topic may be moved to Xen Orchestra since it seems to be an XO issue.