How to mimic '--volumes-from' in Kubernetes

Question

I\'m looking for a pattern that allows to share volumes between two containers running on the same pod in Kubernetes.

My use case is: I have a Ruby on Rails applicat

Answer 1

Kubernetes has its own volume types and these are most used volume type:

1. emptyDir
2. secret
3. gitRepo
4. hostPath (similar to --volumes-from)
5. config Maps
6. persistent storage (storage disks provided by cloud platforms)

You can find more about kubernets volumes here -https://kubernetes.io/docs/concepts/storage/volumes/

an example of hostpath volume :

apiVersion: v1
kind: Pod
metadata:
  name: test-pd
spec:
  containers:
  - image: k8s.gcr.io/test-webserver
    name: test-container
    volumeMounts:
    - mountPath: /test-pd
      name: test-volume
  volumes:
  - name: test-volume
    hostPath:
      # directory location on host
      path: /data
      # this field is optional
      type: Directory

hostpath will mount host/node directory to container directory.Multiple containers inside a pod can use different or same volumes.You need to mention it in each container. hostPath volumes are independent of pod lifecycle but it create tight coupling between node and pod , you should avoid using hostPath.