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<div class="moz-cite-prefix">On 2022-11-29 00:31, Reid Wahl wrote:<br>
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cite="mid:CAPiuu98pu0x+4eToYXg8C8SjRc=aKMiAtPrNZs679e-wWHsxyQ@mail.gmail.com">
<pre class="moz-quote-pre" wrap="">On Mon, Nov 28, 2022 at 8:21 PM Madison Kelly <a class="moz-txt-link-rfc2396E" href="mailto:mkelly@alteeve.com"><mkelly@alteeve.com></a> wrote:
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This question builds on questions I was talking to kgaillot on IRC.
I am try to prevent a resource from being allowed to migrate to or start on a given node. When I asked about this, Ken talked about node attributes, which I've been trying to implement.
To try to figure this out / test this, I setup an attribute against a resource called 'srv01-sql' called 'drbd-fenced_srv01-psql' that sets a location constraint of -INFINITY. I had the resource running on 'mk-a01n01' and then set 'drbd-fenced_srv01-psql=1' to trigger the constraint against 'mk-a01n02'. I verified this was set, then tried migrating it, and it happily migrated.
Clearly I am missing something. :)
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[root@mk-a01n01 ~]# crm_attribute --type nodes --node mk-a01n02 --name drbd-fenced_srv01-sql --query
scope=nodes name=drbd-fenced_srv01-sql value=1
[root@mk-a01n01 ~]# pcs constraint location config
Location Constraints:
Resource: srv01-sql
Enabled on:
Node: mk-a01n02 (score:100)
Node: mk-a01n01 (score:200)
Constraint: location-srv01-sql
Rule: score=-INFINITY
Expression: drbd-fenced_srv01-sql eq 0
Resource: srv02-web
Enabled on:
Node: mk-a01n02 (score:100)
Node: mk-a01n01 (score:200)
[root@mk-a01n01 ~]# crm_attribute --type nodes --node mk-a01n02 --name drbd-fenced_srv01-sql --query
scope=nodes name=drbd-fenced_srv01-sql value=1
[root@mk-a01n01 ~]# pcs resource status srv01-sql
* srv01-sql (ocf::alteeve:server): Started mk-a01n01
[root@mk-a01n01 ~]# pcs constraint location srv01-sql prefers mk-a01n02=200 mk-a01n01=100
[root@mk-a01n01 ~]# pcs resource status srv01-sql
* srv01-sql (ocf::alteeve:server): Migrating mk-a01n01
[root@mk-a01n01 ~]# pcs resource status srv01-sql
* srv01-sql (ocf::alteeve:server): Started mk-a01n02
====
I feel like this shouldn't be so complicated, so I am likely over-thinking this, or missing something obvious...
--
Madison Kelly
Alteeve's Niche!
Chief Technical Officer
c: +1-647-471-0951
<a class="moz-txt-link-freetext" href="https://alteeve.com/">https://alteeve.com/</a>
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The configured rule prevents srv01-sql from running on a node where
the drbd-fenced_srv01-sql attribute is set to 0. It looks like it's
set to 1.
Maybe I'm misunderstanding though -- if I am, can you help clarify and
send the CIB so that I can mess around with it?
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<p>Excuse me one second...</p>
<p>"AAAAAAAAAARG!!!!!!!!!!"</p>
<p>OK, now I am better. Thank you, that was the problem. :)<br>
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<pre class="moz-signature" cols="72">--
Madison Kelly
Alteeve's Niche!
Chief Technical Officer
c: +1-647-471-0951
<a class="moz-txt-link-freetext" href="https://alteeve.com/">https://alteeve.com/</a></pre>
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