Support Citus 11

[nathanieltalbot]

Citus 11.x introduced a couple of breaking changes to the tables that pgmetrics queries, which causes errors when pgmetrics is run against Citus clusters on Citus 11. See release notes for details: https://www.citusdata.com/updates/v11-0/. The specific breaking changes are:

citus_worker_stat_activity has been dropped in favor of citus_stat_activity and citus_dist_stat_activity. https://github.com/citusdata/citus/pull/5760. This causes this error when querying:

pgmetrics: warning: citus_worker_stat_activity query failed: pq: relation "citus_worker_stat_activity" does not exist

citus_dist_stat_activity does not have query_hostname and is a view over citus_stat_activity: https://github.com/citusdata/citus/pull/5760 which causes an issue when trying to get query_hostname:

pgmetrics: warning: citus_dist_stat_activity query failed: pq: column "query_hostname" does not exist

citus_lock_waits no longer has column waiting_pid but waiting_gpid (see: https://github.com/citusdata/citus/pull/5766) which causes this issue when trying to query the table:

pgmetrics: warning: citus_lock_waits query failed: pq: column "waiting_pid" does not exist

Would it be possible to get these models updated for the most recent major version of Citus?

[mdevan]

Thanks for listing out the breaking changes.

The next release of pgmetrics will have support for Citus 11.

[mdevan]

Available in release v1.14.0.