How to store Docker image layers caching centrally in one volume.

[sagar-bud]

Hello,

I have registered the runner on GKE cluster on GCP. Also, i have configured Docker image layers caching using the below URL and it's working fine when single pipeline or runner pod is running.
https://github.com/actions/actions-runner-controller/blob/master/docs/using-custom-volumes.md#docker-image-layers-caching

I have registered GitHub action runner in GKE cluster at organisation level. In organisation, I have multiple repositories. When single pipeline or runner pod is running, it will use existing PV and docker layer caching is working. but when multiple pipeline or multiple runner pods are running, it will create new PV to store the docker cache. hence, docker caching is not working because docker cache is not available in newly created PV.

Is there any option we can store docker cache centrally?