如何更新部署在 Kube.netes pod 上的 postgresql 中的 max_connections

Question

I want to update the max_connection count in /var/lib/postgresql/data/pgdata/postgresql.conf file, postgresql database is deployed in the form of pod. There is no vim present inside pod to update the file, nor I could modify the Dockerfile to install vim, as I don't have access for that. Also I have tried adding the args and command in the deployment.yaml file

containers:
        - name: postgres
          image: postgres:latest
          args: ["-c", "max_connections=500"]

still no luck for it.

Answer 1

1. You can use sed to edit this file?
2. Some helpfull options on this thread

Answer 2

Just increasing max_connections is bad idea. You need to increase shared_buffers and kernel.shmmax as well.

Kindly refer to this SO answer here for more information.