c12s-kubespray/roles/download/tasks/check_pull_required.yml
2019-10-02 04:41:07 -07:00

32 lines
1.5 KiB
YAML

---
# NOTE: The ampersand hell in this block is needed because docker-inspect uses go templates,
# which uses double ampersands as delimiters, just like Jinja does. If you want to understand
# the template, just replace all instances of {{ `{{` }} with {{ and {{ '}}' }} with }}.
# It will output something like the following:
# nginx:1.15,gcr.io/google-containers/kube-proxy:v1.14.1,gcr.io/google-containers/kube-proxy@sha256:44af2833c6cbd9a7fc2e9d2f5244a39dfd2e31ad91bf9d4b7d810678db738ee9,gcr.io/google-containers/kube-apiserver:v1.14.1,etc...
- name: check_pull_required | Generate a list of information about the images on a node
shell: "{{ image_info_command }}"
delegate_to: "{{ download_delegate if download_run_once or inventory_hostname }}"
no_log: true
register: docker_images
failed_when: false
changed_when: false
check_mode: no
become: "{{ not download_localhost }}"
when: not download_always_pull
- name: check_pull_required | Set pull_required if the desired image is not yet loaded
set_fact:
pull_required: >-
{%- if image_reponame in docker_images.stdout.split(',') %}false{%- else -%}true{%- endif -%}
when: not download_always_pull
- name: check_pull_required | Check that the local digest sha256 corresponds to the given image tag
assert:
that: "{{ download.repo }}:{{ download.tag }} in docker_images.stdout.split(',')"
when:
- not download_always_pull
- not pull_required
- pull_by_digest
tags:
- asserts