Mounting host data volumes to a Docker container

Mount host data volumes to a Docker container in the Kubernetes YAML file.

About this task

Docker supports the mounting of one or more data volumes from the host OS to the Docker container. Follow this procedure to mount host data volumes to a Docker container by defining the volumes and volumeMounts parameters in the Kubernetes YAML file.

Procedure

Define the path to the host directory under the volumes parameter, and the path to the container directory under the volumeMounts parameter in the Kubernetes YAML file:

kind: ReplicationController
apiVersion: v1
metadata:
spec:
  replicas: 1
  selector:
  template:
    metadata:
    spec:
      containers:
        - name: sym-primary
          image: sym711
          command:
       volumeMounts:
            - name: data
            mountPath: /data
            readOnly: false
            - name: java
            mountPath: /opt/java
            readOnly: true
          resources:
            requests:
              memory: 4096M
            limits:
              memory: 8192M
      volumes:
        - name: data
          hostPath:
            path: /home/jmlv
        - name: java
          hostPath:
            path: /pcc/app/IBM_jdk1.7/Linux-ibm-java-x86_64-70/

Results

The host data volumes are mounted to the Docker container.