Redis health check disappeared from readiness monitoring

We are using Gitlab-CE 15.4 running on-premise. After the upgrade of this version the monitoring check https://localhost/-/readiness?all=1 does not return “redis_check” status.

Expected JSON response:
{“status”:“ok”,“master_check”:[{“status”:“ok”}],“db_check”:[{“status”:“ok”}],“redis_check”:[{“status”:“ok”}],“cache_check”:[{“status”:“ok”}],“queues_check”:[{“status”:“ok”}],“shared_state_check”:[{“status”:“ok”}],“trace_chunks_check”:[{“status”:“ok”}],“rate_limiting_check”:[{“status”:“ok”}],“sessions_check”:[{“status”:“ok”}],“gitaly_check”:[{“status”:“ok”,“labels”:{“shard”:“default”}}]}

Actual JSON response:
{“status”:“ok”,“master_check”:[{“status”:“ok”}],“db_check”:[{“status”:“ok”}],“cache_check”:[{“status”:“ok”}],“queues_check”:[{“status”:“ok”}],“rate_limiting_check”:[{“status”:“ok”}],“sessions_check”:[{“status”:“ok”}],“shared_state_check”:[{“status”:“ok”}],“trace_chunks_check”:[{“status”:“ok”}],“gitaly_check”:[{“status”:“ok”,“labels”:{“shard”:“default”}}]}

I did not find nether mentions of deprecation or deletion of redis_check in Release notes, nor information in the documentation to enable/configure this check.

Is it a bug?

Thanks for flagging, I have cross-linked this topic in the report at Readiness status for Redis has disappear on Gitlab 15.4.0 (#375614) · Issues · GitLab.org / GitLab · GitLab