Chapter 10. Setting up container storage by using cloud-init

Prerequisites

• Depending on the requirements of your datasource, edit the user-data file or add the following directive to the cloud.cfg.d directory:

  Note

  All user directives include #cloud-config at the top of the file so that cloud-init recognizes the file as containing user directives. When you include directives in the cloud.cfg.d directory, name the file *.cfg, and always include #cloud-config at the top of the file.

Procedure

• Add or modify the write_files module to include the path to the container-storage-setup utility:

  write_files:
    - path: /etc/sysconfig/docker-storage-setup
      permissions: 0644
      owner: root
      content: |
      ROOT_SIZE=6G

  Note

  This example sets the size of the root logical volume to 6 GB rather than the default 3 GB.

Verification

• Verify that the container storage is set up correctly:

  # docker info | grep "Docker Root Dir"

  Docker Root Dir: /var/lib/docker

  If the output displays the container storage is set up correctly.