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modify-image

An Ansible role for modifying an image via the libguestfs tool, virt-customize. The role requires an image and a script to run inside of that image via virt-customize. It also has paramaters for how much memory and cpu to give the virt-customize VM, and a list of artifacts to copy out of the VM after running the script. The script will always produce a log of the same name as the script with .log appended. This can be extracted via the modify_image_extract_list variable.

Requirements

libguestfs

Role Variables

image_to_modify -- the image that virt-customize will operate on
modify_script -- the script that will be run inside the image
modify_image_upload_files -- list of src/dest of files to upload to image (files are uploaded before running the script)
modify_image_extract_list -- list of artifacts to extract after the image is modified
modify_image_working_dir -- directory containing image and script. This is also where extracted files and logs will end up.
modify_image_vc_ram -- amount of RAM to give the virt-customize VM (in MB)
modify_image_vc_cpu -- number of CPUs to give the virt-customize VM
modify_image_vc_verbose -- whether to run virt-customize with verbose flag
modify_image_vc_trace -- whether to run virt-customize with trace flag

Example Usage

---
- name: |
    Run a script inside an image via virt-customize without extracting anything    
  hosts: virthost
  vars:
    image_to_modify: "{{ working_dir }}/undercloud.qcow2"
    modify_script: "{{ working_dir }}/undercloud_convert.sh"
  roles:
    - modify-image

- name: Run a script inside an image and extract the log from the script
  hosts: virthost
  vars:
    image_to_modify: "{{ working_dir }}/undercloud.qcow2"
    modify_script: "{{ working_dir }}/undercloud_convert.sh"
    modify_image_extract_list:
      - /tmp/builder.log
  roles:
    - modify-image

- name: Run a script inside an image that needs to have lots of resources
  hosts: virthost
  vars:
    image_to_modify: "{{ working_dir }}/undercloud.qcow2"
    modify_script: "{{ working_dir }}/undercloud_convert.sh"
    modify_image_vc_cpu: 8
    modify_image_vc_ram: 16384
  roles:
    - modify-image

- name: Run a script inside an image with virt-customize in verbose mode
  hosts: virthost
  vars:
    image_to_modify: "{{ working_dir }}/undercloud.qcow2"
    modify_script: "{{ working_dir }}/undercloud_convert.sh"
    modify_image_verbose: true
  roles:
    - modify-image

- name: Upload files to image
  hosts: virthost
  vars:
    image_to_modify: "{{ working_dir }}/undercloud.qcow2"
    modify_image_upload_files:
      - src: /tmp/file_to_upload.tar.gz
        dest: /home/user/renamed_file.tar.gz
      - src: /home/local_user/file
        dest: /home/image_user/
  roles:
    - modify-image

- name: Upload files to image and run script
  hosts: virthost
  vars:
    image_to_modify: "{{ working_dir }}/undercloud.qcow2"
    modify_image_upload_files:
      - src: /tmp/file_to_upload.tar.gz
        dest: /home/user/renamed_file.tar.gz
      - src: /home/local_user/file
        dest: /tmp/
    modify_script: "{{ working_dir }}/undercloud_convert.sh"
  roles:
    - modify-image

License

Apache

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