Can you add Galera Arbitrator nodes to PMM?

Percona Monitoring and Management (PMM)
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Description:

If you have some Galera Arbitrator nodes in your cluster, can you add these to PMM? If so, how?

Thanks

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Hey there @wackget,
In order to add arbitrator nodes to PMM, there would need to be an exporter. We don’t have one, and a quick googling doesn’t show one from the community. And since the arbitrator isn’t a mysql server, and doesn’t speak mysql-protocol, you can’t use the mysqld_exporter.

Short answer is, there isn’t any way to add arbitrator to PMM.

What specific information are you looking to find from the arbitrator in PMM?

1 Like
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Thanks for replying.

At the most basic level, being able to see that the server is online, garbd is running, and is connected to and communicating with the rest of the cluster would be very useful.

Not sure if other metrics like transaction counts/latency/etc. matter to garbd but if they do, those would be really useful to see too.

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Hey @wackget,
Garbd increases wsrep_cluster_size, so most users will monitor that parameter from the MySQL side. For the process itself, you could use the process_exporter as an external exporter and monitor the process. The garbd also outputs logs, so you could use Loki to parse the logs and setup alarms that way.