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14.2. Starting a Container

Execute the following steps to start the container.
  1. Execute the following command to run the container: 
    # docker run -d --privileged=true --net=host --name <container-name> -v /run -v /etc/glusterfs:/etc/glusterfs:z -v /var/lib/glusterd:/var/lib/glusterd:z -v /var/log/glusterfs:/var/log/glusterfs:z -v /sys/fs/cgroup:/sys/fs/cgroup:ro -v /mnt/brick1:/mnt/container_brick1:z <image name>
    where,
    • --net=host option ensures that the container has full access to the network stack of the host.
    • /mnt/brick1 is the mountpoint of the brick in the atomic host and :/mnt/container_brick1 is the mountpoint of the brick in the container.
    • -d option starts the container in the detached mode.
    For example: 
    # docker run -d --privileged=true --net=host --name glusternode1 -v /run -v /etc/glusterfs:/etc/glusterfs:z -v /var/lib/glusterd:/var/lib/glusterd:z -v /var/log/glusterfs:/var/log/glusterfs:z -v /sys/fs/cgroup:/sys/fs/cgroup:ro -v /mnt/brick1:/mnt/container_brick1:z rhgs3/rhgs-server-rhel7

5ac864b5abc74a925aecc4fe9613c73e83b8c54a846c36107aa8e2960eeb97b4
    Where, 5ac864b5abc74a925aecc4fe9613c73e83b8c54a846c36107aa8e2960eeb97b4 is the container ID.

    Note

    • SELinux labels are automatically reset to svirt_sandbox_file_t so that the container can interact with the Atomic Host directory.
    • In the above command, the following ensures that the gluster configuration are persistent. 
      -v /etc/glusterfs:/etc/glusterfs:z -v /var/lib/glusterd:/var/lib/glusterd -v /var/log/glusterfs:/var/log/glusterfs
  2. If you want to use snapshot then execute the following command: 
    # docker run -d --privileged=true --net=host --name <container-name> -v /dev:/dev -v /run -v /etc/glusterfs:/etc/glusterfs:z -v /var/lib/glusterd:/var/lib/glusterd:z -v /var/log/glusterfs:/var/log/glusterfs:z -v /sys/fs/cgroup:/sys/fs/cgroup:ro -v /mnt/brick1:/mnt/container_brick1:z <image name>
    where, /mnt/brick1 is the mountpoint of the brick in the atomic host and :/mnt/container_brick1 is the mountpoint of the brick in the container.
    For example: 
    # docker run -d --privileged=true --net=host --name glusternode1 -v /dev:/dev -v /run -v /etc/glusterfs:/etc/glusterfs:z -v /var/lib/glusterd:/var/lib/glusterd:z -v /var/log/glusterfs:/var/log/glusterfs:z -v /sys/fs/cgroup:/sys/fs/cgroup:ro -v /mnt/brick1:/mnt/container_brick1:z rhgs3/rhgs-server-rhel7

5da2bc217c0852d2b1bfe4fb31e0181753410071584b4e38bd77d7502cd3e92b
  3. To verify if the container is created, execute the following command: 
    # docker ps
    For example: 
    # docker ps

CONTAINER ID        IMAGE               COMMAND                CREATED             STATUS                      PORTS               NAMES
5da2bc217c08        891ea0584e94        "/usr/sbin/init"       10 seconds ago      Up 9 seconds                                    glusternode1
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