[mysql] Collect galera cluster node state

[jcastill]

This patch collects the galera mysql node state
stored in the following file:

/var/lib/mysql/grastate.dat

It contains details of the galera node like version,
uuid, seqno, and current value in that node of
safe_to_bootstrap. The idea is that for a galera
mysql cluster, we'll get this status file from
each node in the sosreport, and we'll have a fuller
picture of the issue.

Signed-off-by: Jose Castillo jcastillo@redhat.com

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[bmr-cymru]

So long as this "belongs" to MySQL, looks fine to me (which based on the path seems likely).

Are these a cluster type worth considering for sos-collector too?

[jcastill]

So long as this "belongs" to MySQL, looks fine to me (which based on the path seems likely).

I was in doubt at the beginning between making a new plugin for galera or adding it to mysql, but the comment that precedes the line I added made me think it was better to stick to this plugin.

Are these a cluster type worth considering for sos-collector too?
I'll investigate about that. I haven't played with sos-collector yet so it may take me a bit of time to implement a patch.