We're writing a custom RA for a multi-tenant MySQL cluster that runs in
active/standby mode. I've read the RA documentation about what exit codes
should be returned for various outcomes, but something is still unclear to me.
We run multiple instances of MySQL from one filesystem, like this:
/app_root
/mysql1
/mysql2
/mysql3
...etc.
The /app_root filesystem lives on a DRBD volume, which is only mounted on the
active node.
When the RA performs a "start," "stop," or "monitor" action on the standby
node, the filesystem is not mounted so the mysql instances are not present.
What should the return codes for those actions be? Fail? Not installed?
Unknown error?
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