How can I change the Patroni log level?

For my production postgres clusters I'd like to limit log messages to a reasonable amount. Therefore I want to get rid off all the Patroni log messages that are logged - about every 10 seconds - at the INFO level, e.g.:

11/9/2020 5:27:22 PM 2020-11-09 16:27:22,345 INFO: Lock owner: cluster-name-0; I am cluster-name-0
11/9/2020 5:27:22 PM 2020-11-09 16:27:22,401 INFO: no action.  i am the leader with the lock

I found in the Patroni documentation that I can set the environment variable PATRONI_LOG_LEVEL, but I don't know how I can achieve this when Patroni is managed with the Postgres Operator (I use version v1.5.0). I tried setting it in the ConfigMap that I also use to configure WAL backups, but that hadn't any effect. Can anybody point me in the right direction?

Besides these Patroni messages I also see the following message about every 30 seconds:

2020-11-09 16:27:21.335 46 LOG {ticks: 0, maint: 0, retry: 0}

I don't know where it is coming from and how to suppress these message. Again, any help is appreciated.

Start with the Postgres Operator v1.5.0 configuration documentation and its handling of ConfigMaps and environment variables. Verify whether PATRONI_LOG_LEVEL can be passed to Patroni and identify the source of the {ticks: 0, maint: 0, retry: 0} message. Done means documenting the supported configuration and how to suppress both message types.