Merge pull request #117 from jpds/cadvisor-role

roles/cadvisor: Added.

ansible/cadvisor.yml

+---
+# Deploy/pull/reconfigure/upgrade cAdvisor.
+#
+# Follows kolla-ansible service deployment patterns.
+#
+# Variables:
+# action: One of deploy, destroy, pull, reconfigure, upgrade
+
+- name: Ensure cAdvisor is deployed
+  hosts: overcloud:&docker
+  tags:
+    - cadvisor
+  roles:
+    - role: cadvisor

ansible/group_vars/all/cadvisor

+---
+###############################################################################
+# cAdvisor configuration.
+
+# Whether cAdvisor is enabled.
+cadvisor_enabled: False

ansible/overcloud-extras.yml

@@ -11,3 +11,4 @@
 - include: inspection-store.yml
 - include: opensm.yml
 - include: node-exporter.yml
+- include: cadvisor.yml

ansible/roles/cadvisor/README.md

+cAdvisor
+========
+
+This role can be used to configure cAdvisor running in a Docker container.
+
+Requirements
+------------
+
+The host executing the role has the following requirements:
+
+* Docker engine
+* Python ``docker >= 2.0.0``
+
+Role Variables
+--------------
+
+``cadvisor_enabled``: Whether the cAdvisor is enabled. Defaults to ``false``.
+``cadvisor_namespace``: Docker image namespace. Defaults to ``cadvisor``.
+``cadvisor_image``: Docker image name.
+``cadvisor_tag``: Docker image tag. Defaults to ``v0.28.3``.
+``cadvisor_image_full``: Full docker image specification.
+``cadvisor_restart_policy``: Docker restart policy for cAdvisor container. Defaults
+to ``unless-stopped``.
+``cadvisor_restart_retries``: Number of Docker restarts. Defaults to 10.
+
+Dependencies
+------------
+
+None
+
+Example Playbook
+----------------
+
+The following playbook configures cAdvisor.
+
+    ---
+    - hosts: cadvisor
+      roles:
+        - role: cadvisor
+
+Author Information
+------------------
+
+- Jonathan Davies (<jpds@protonmail.com>)

ansible/roles/cadvisor/defaults/main.yml

+---
+# Roughly follows kolla-ansible's service deployment patterns.
+
+# Whether cAdvisor is enabled.
+cadvisor_enabled: false
+
+# Service deployment definition.
+cadvisor_services:
+  cadvisor:
+    container_name: cadvisor
+    enabled: "{{ cadvisor_enabled }}"
+    image: "{{ cadvisor_image_full }}"
+    published_ports: '8080:8080'
+    read_only: True
+    volumes:
+      - "/:/rootfs"
+      - "/var/run:/var/run:rw"
+      - "/sys:/sys:ro"
+      - "/var/lib/docker/:/var/lib/docker:ro"
+      - "/dev/disk/:/dev/disk:ro"
+
+####################
+# Docker
+####################
+cadvisor_namespace: "cadvisor"
+cadvisor_image: "{{ docker_registry ~ '/' if docker_registry | default else '' }}{{ cadvisor_namespace }}/cadvisor"
+cadvisor_tag: "v0.28.3"
+cadvisor_image_full: "{{ cadvisor_image }}:{{ cadvisor_tag }}"
+
+cadvisor_restart_policy: "unless-stopped"
+#cadvisor_restart_retries: 10

ansible/roles/cadvisor/tasks/deploy.yml

+---
+- name: Ensure cAdvisor container is running
+  docker_container:
+    image: "{{ item.value.image }}"
+    name: "{{ item.value.container_name }}"
+    command: "{{ item.value.command }}"
+    network_mode: "host"
+    privileged: "{{ item.value.privileged | default(omit) }}"
+    published_ports: "{{ item.value.published_ports | default(omit) }}"
+    read_only: "{{ item.value.read_only | default(omit) }}"
+    restart_policy: "{{ nodeexporter_restart_policy }}"
+    restart_retries: "{{ nodeexporter_restart_retries | default(omit) }}"
+    state: "{{ item.value.enabled | ternary('started', 'absent') }}"
+    volumes: "{{ item.value.volumes }}"
+  with_dict: "{{ cadvisor_services }}"

ansible/roles/cadvisor/tasks/destroy.yml

+---
+- name: Ensure cAdvisor container is stopped
+  docker_container:
+    name: "{{ item.value.container_name }}"
+    state: "absent"
+  with_dict: "{{ cadvisor_services }}"
+
+- name: Check whether cAdvisor volumes are present
+  command: docker volume inspect {{ volume }}
+  changed_when: False
+  with_subelements:
+    - "{{ cadvisor_services }}"
+    - volumes
+  when: "'/' not in volume"
+  failed_when:
+    - volume_result.rc != 0
+    - "'No such volume' not in volume_result.stderr"
+  vars:
+    volume: "{{ item.1.split(':')[0] }}"
+  register: volume_result
+
+- name: Ensure cAdvisor volumes are absent
+  command: docker volume rm {{ volume }}
+  with_items: "{{ volume_result.results }}"
+  when:
+    - not item | skipped
+    - item.rc == 0
+  vars:
+    volume: "{{ item.item.1.split(':')[0] }}"

ansible/roles/cadvisor/tasks/main.yml

+---
+- include: "{{ action }}.yml"

ansible/roles/cadvisor/tasks/pull.yml

+---
+- name: Pulling cAdvisor container image
+  docker_image:
+    name: "{{ item.value.image }}"
+    repository: "{{ item.value.image }}"
+    state: present
+  with_dict: "{{ cadvisor_services }}"
+  when:
+    - item.value.enabled
+    - action != 'destroy'

ansible/roles/cadvisor/tasks/reconfigure.yml

+deploy.yml
\ No newline at end of file

ansible/roles/cadvisor/tasks/upgrade.yml

+---
+- include: pull.yml
+- include: deploy.yml

etc/kayobe/cadvisor.yml

+---
+###############################################################################
+# cAdvisor configuration.
+
+# Whether cAdvisor is enabled.
+#cadvisor_enabled:
+
+###############################################################################
+# Dummy variable to allow Ansible to accept this file.
+workaround_ansible_issue_8743: yes