#cloud-config
write_files:
  - path: /etc/sytemd/system/var-lib-docker.mount
    owner: "root:root"
    permissions: "0644"
    content: |
      [Unit]
      Description=Mount ephemeral to /var/lib/docker

      [Mount]
      What=/dev/vdb
      Where=/var/lib/docker
      Type=ext4

      [Install]
      WantedBy=local-fs.target

  - path: /etc/sysconfig/enable-docker-mount.sh
    owner: "root:root"
    permissions: "0755"
    content: |
      #!/bin/sh
      if [  -n "$DOCKER_VOLUME_SIZE" ] && [ "$DOCKER_VOLUME_SIZE" -gt 0 ]; then
         if [[ $(blkid -o value -s TYPE /dev/vdb) ]]; then
            systemctl daemon-reload
            systemctl start var-lib-docker.mount
            systemctl enable var-lib-docker.mount
         else
            mkfs -t ext4 /dev/vdb
            systemctl daemon-reload
            systemctl start var-lib-docker.mount
            systemctl enable var-lib-docker.mount
         fi
       fi

  - path: /etc/systemd/system/enable-docker-mount.service
    owner: "root:root"
    permissions: "0644"
    content: |
      [Unit]
      Description=Mount docker volume

      [Service]
      Type=oneshot
      EnvironmentFile=/etc/sysconfig/heat-params
      ExecStart=/etc/sysconfig/enable-docker-mount.sh

      [Install]
      RequiredBy=multi-user.target