<![CDATA[Migrating a single host to an existing pool]]>I have two pools each with a single host each. One has VMs and one host has none.

I wish to have both hosts in the same pool.

It appears I am unable to move a host out of it's pool as the host is the pool master.

How can I get around this?

]]>https://xcp-ng.org/forum/topic/9825/migrating-a-single-host-to-an-existing-poolRSS for NodeMon, 10 Aug 2026 08:09:23 GMTFri, 18 Oct 2024 05:51:03 GMT60<![CDATA[Reply to Migrating a single host to an existing pool on Fri, 18 Oct 2024 10:56:42 GMT]]>@McHenry on the host you want to join: check if /etc/stunnel/certs/sdn-controller-ca.pem exists - if not create it: touch /etc/stunnel/certs/sdn-controller-ca.pem and then
xe pool-certificate-uninstall name=sdn-controller-ca.pem then retry the join.

]]>https://xcp-ng.org/forum/post/84446https://xcp-ng.org/forum/post/84446Fri, 18 Oct 2024 10:56:42 GMT<![CDATA[Reply to Migrating a single host to an existing pool on Fri, 18 Oct 2024 16:45:15 GMT]]>Just going to XO / Home / Pools / pool-1 and pressing "Add hosts" button, selecting host-2 worked OK this time. So no detaching host from a pool and attaching to new pool ... just a button 🙂

]]>https://xcp-ng.org/forum/post/84476https://xcp-ng.org/forum/post/84476Fri, 18 Oct 2024 16:45:15 GMT<![CDATA[Reply to Migrating a single host to an existing pool on Fri, 18 Oct 2024 14:05:48 GMT]]>@BenjiReis Thanks. So what are my exact steps please?

I have 2 pools with 1 host each. Each host is master of its pool. (this is what you get by fresh installing xcp-ng on second machine and adding it in XO / New / Server)

I want one pool with 2 hosts.

Do I just go XO / Home / Pools / pool-1 and press "Add hosts" button selecting host-2?
Do I still need to execute xe pool-certificate-uninstall on host-2 ?

Last time I tried it I got some weird errors everywhere, but that might be because of botched Patches upgrade, I was impatient.
Thanks!

]]>https://xcp-ng.org/forum/post/84461https://xcp-ng.org/forum/post/84461Fri, 18 Oct 2024 14:05:48 GMT<![CDATA[Reply to Migrating a single host to an existing pool on Fri, 18 Oct 2024 13:51:51 GMT]]>@maxxie XO / Settings / Servers is to show a list our your pool's masters so one per pool.

It's expected as only the master is connected to XO and then dispach the API calls to other hosts when relevant.
If the Pool view shows 2 hosts then you're good.

You can also ssh to any of your host and run xe host-list you should see the 2 listed 🙂

]]>https://xcp-ng.org/forum/post/84457https://xcp-ng.org/forum/post/84457Fri, 18 Oct 2024 13:51:51 GMT<![CDATA[Reply to Migrating a single host to an existing pool on Fri, 18 Oct 2024 12:27:39 GMT]]>@McHenry Hi. Could you, please, list exact steps you had to do?

Im in the same situation as in your original post. If I open first pool and simply try "Add hosts" button, and add second host, the first pool shows second host, but XO / Settings / Servers only shows first host.
And xo-cli server.getAll shows second host as "status: 'disconnected'.

So after you did steps by @BenjiReis, what exactly did you do after?
When you say "move a host out of it's pool", ho do you do that?

I'm trying to solve this for more than a day now.
Thanks!

]]>https://xcp-ng.org/forum/post/84452https://xcp-ng.org/forum/post/84452Fri, 18 Oct 2024 12:27:39 GMT<![CDATA[Reply to Migrating a single host to an existing pool on Fri, 18 Oct 2024 11:07:05 GMT]]>@BenjiReis

Worked perfectly. Thanks guys.

]]>https://xcp-ng.org/forum/post/84447https://xcp-ng.org/forum/post/84447Fri, 18 Oct 2024 11:07:05 GMT<![CDATA[Reply to Migrating a single host to an existing pool on Fri, 18 Oct 2024 10:56:42 GMT]]>@McHenry on the host you want to join: check if /etc/stunnel/certs/sdn-controller-ca.pem exists - if not create it: touch /etc/stunnel/certs/sdn-controller-ca.pem and then
xe pool-certificate-uninstall name=sdn-controller-ca.pem then retry the join.

]]>https://xcp-ng.org/forum/post/84446https://xcp-ng.org/forum/post/84446Fri, 18 Oct 2024 10:56:42 GMT<![CDATA[Reply to Migrating a single host to an existing pool on Fri, 18 Oct 2024 10:52:24 GMT]]>@BenjiReis

[21:48 svr10451 ~]# xe pool-join master-address=10.0.0.4 master-username=root master-password="*******************************"
The host joining the pool has different CA certificates from the pool coordinator while using the same name, uninstall them and try again.
<extra>: sdn-controller-ca.pem

https://docs.xenserver.com/en-us/xenserver/developer/xenserver-8/management-api/api-errors

Both hosts are xcp-ng 8.3

]]>https://xcp-ng.org/forum/post/84445https://xcp-ng.org/forum/post/84445Fri, 18 Oct 2024 10:52:24 GMT<![CDATA[Reply to Migrating a single host to an existing pool on Fri, 18 Oct 2024 10:34:20 GMT]]>You can also do this from a host's xsconsole with the menu:

  • Resource Pool Configuration
    • Join a Resource Pool
]]>https://xcp-ng.org/forum/post/84441https://xcp-ng.org/forum/post/84441Fri, 18 Oct 2024 10:34:20 GMT<![CDATA[Reply to Migrating a single host to an existing pool on Fri, 18 Oct 2024 09:30:04 GMT]]>It is also possible to perform this activity from within XO as described here. There are some prerequisites for performing this action that you should review -- https://docs.xcp-ng.org/installation/requirements/#-pool-requirements

]]>https://xcp-ng.org/forum/post/84437https://xcp-ng.org/forum/post/84437Fri, 18 Oct 2024 09:30:04 GMT<![CDATA[Reply to Migrating a single host to an existing pool on Fri, 18 Oct 2024 08:13:16 GMT]]>@McHenry not sure what you mean.

You can easily join the host with no VMs to the other one by calling xe pool-join master-address=<ip of other host> master-username=... master-password=...

Then you should have a 2 hosts pool.

What make you think it's not possible?

]]>https://xcp-ng.org/forum/post/84430https://xcp-ng.org/forum/post/84430Fri, 18 Oct 2024 08:13:16 GMT