Cannot add custom labels for PostgreSQL metrics sent to PMM

[konoox]

Proposal

As far as I know, the CR definition of Percona PostgreSQL cluster does not provide any configuration attribute to add custom labels to the metrics sent to the PMM server from pmm-client containers.
This is possible with Percona MongoDB clusters using spec.pmm.mongodParams and spec.pmm.mongosParams, but also with Percona XtraDB clusters using spec.pmm.pxcParams and spec.proxysqlParams.

Use-Case

The additional flags, in my case custom labels, are added to the "pmm-admin add" options through the PMM_ADMIN_CUSTOM_PARAMS environment variable in the prerun script :

Psmdb definition :

kind: PerconaServerMongoDB
…
spec:
pmm:
mongodParams: --custom-labels=namespace=my-namespace

Mongo pod definition :

• name: PMM_ADMIN_CUSTOM_PARAMS
  value: --custom-labels=namespace=my-namespace
  …
• name: PMM_AGENT_PRERUN_SCRIPT
  value: |-
  cat /etc/mongodb-ssl/tls.key /etc/mongodb-ssl/tls.crt > /tmp/tls.pem;
  pmm-admin status --wait=10s;
  pmm-admin add $(DB_TYPE) $(PMM_ADMIN_CUSTOM_PARAMS) …

It would be a great feature to implement this for the Percona PostgreSQL operator as well !

Is this a feature you are interested in implementing yourself?

No

Anything else?

No response

[hors]

Hi @konoox, I have created the jira task https://perconadev.atlassian.net/browse/K8SPG-604 to add it for PG operator. I hope we will add in in PGO v2.7.0. Thank you.