On 2/9/22 17:46, Lentes, Bernd wrote:
----- On Feb 7, 2022, at 4:13 PM, Jehan-Guillaume de Rorthais j...@dalibo.com
wrote:
On Mon, 7 Feb 2022 14:24:44 +0100 (CET)
"Lentes, Bernd" <bernd.len...@helmholtz-muenchen.de> wrote:
Hi,
i'm currently changing a bit in my cluster because i realized that my
configuration for a power outtage didn't work as i expected. My idea is
currently:
- first stop about 20 VirtualDomains, which are my services. This will surely
takes some minutes. I'm thinking of stopping each with a time difference of
about 20 seconds for not getting to much IO load. and then ...
This part is tricky. At one hand, it is good thinking to throttle IO load.
On the other hand, as Jehan and Ulrich mentioned, `crm resource stop <rsc>`
introduces "target‑role=Stopped" for each VirtualDomain, and have to do `crm
resource start <rsc>` to changed it back to "target‑role=Started" to start them
after the power outage.
- how to stop the other resources ?
I would set cluster option "stop-all-resources" so all remaining resources are
stopped gracefully by the cluster.
Then you can stop both nodes using eg. "crm cluster stop".
Here, for SLES12SP5, `crm cluster run "crm cluster stop"` could help a little.
From crmsh-4.4.0 onward, `crm cluster stop --all` is recommended to simplify
the whole procedure to do the cluster wide shutdown.
BR,
Roger
On restart, after both nodes are up and joined to the cluster, you can set
"stop-all-resources=false", then start your VirtualDomains.
Aren't the VirtualDomains already started by "stop-all-resources=false" ?
I wrote a script for the whole procedure which is triggered by the UPS.
As i am not a big schellscript-writer please have a look and tell me your
opinion.
You find it here:
https://nc-mcd.helmholtz-muenchen.de/nextcloud/s/rEA9bFxs5Ay6fYG
Thanks.
Bernd
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