From 6277688be9278d1df1f60eb6cf0c22538ef7cbb1 Mon Sep 17 00:00:00 2001
From: Jonathan Davies <jpds@protonmail.com>
Date: Tue, 23 Jan 2018 12:17:17 +0000
Subject: [PATCH] roles/cadvisor: Added.

---
 ansible/cadvisor.yml                         | 14 +++++++
 ansible/overcloud-extras.yml                 |  1 +
 ansible/roles/cadvisor/README.md             | 44 ++++++++++++++++++++
 ansible/roles/cadvisor/defaults/main.yml     | 31 ++++++++++++++
 ansible/roles/cadvisor/tasks/deploy.yml      | 15 +++++++
 ansible/roles/cadvisor/tasks/destroy.yml     | 29 +++++++++++++
 ansible/roles/cadvisor/tasks/main.yml        |  2 +
 ansible/roles/cadvisor/tasks/pull.yml        | 10 +++++
 ansible/roles/cadvisor/tasks/reconfigure.yml |  1 +
 ansible/roles/cadvisor/tasks/upgrade.yml     |  3 ++
 10 files changed, 150 insertions(+)
 create mode 100644 ansible/cadvisor.yml
 create mode 100644 ansible/roles/cadvisor/README.md
 create mode 100644 ansible/roles/cadvisor/defaults/main.yml
 create mode 100644 ansible/roles/cadvisor/tasks/deploy.yml
 create mode 100644 ansible/roles/cadvisor/tasks/destroy.yml
 create mode 100644 ansible/roles/cadvisor/tasks/main.yml
 create mode 100644 ansible/roles/cadvisor/tasks/pull.yml
 create mode 120000 ansible/roles/cadvisor/tasks/reconfigure.yml
 create mode 100644 ansible/roles/cadvisor/tasks/upgrade.yml

diff --git a/ansible/cadvisor.yml b/ansible/cadvisor.yml
new file mode 100644
index 000000000..97a51d211
--- /dev/null
+++ b/ansible/cadvisor.yml
@@ -0,0 +1,14 @@
+---
+# 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
diff --git a/ansible/overcloud-extras.yml b/ansible/overcloud-extras.yml
index 58aec6f70..453abae5b 100644
--- a/ansible/overcloud-extras.yml
+++ b/ansible/overcloud-extras.yml
@@ -11,3 +11,4 @@
 - include: inspection-store.yml
 - include: opensm.yml
 - include: node-exporter.yml
+- include: cadvisor.yml
diff --git a/ansible/roles/cadvisor/README.md b/ansible/roles/cadvisor/README.md
new file mode 100644
index 000000000..a9e9feb36
--- /dev/null
+++ b/ansible/roles/cadvisor/README.md
@@ -0,0 +1,44 @@
+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>)
diff --git a/ansible/roles/cadvisor/defaults/main.yml b/ansible/roles/cadvisor/defaults/main.yml
new file mode 100644
index 000000000..c347a76e4
--- /dev/null
+++ b/ansible/roles/cadvisor/defaults/main.yml
@@ -0,0 +1,31 @@
+---
+# 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"
+#nodeexporter_restart_retries: 10
diff --git a/ansible/roles/cadvisor/tasks/deploy.yml b/ansible/roles/cadvisor/tasks/deploy.yml
new file mode 100644
index 000000000..0a2242f52
--- /dev/null
+++ b/ansible/roles/cadvisor/tasks/deploy.yml
@@ -0,0 +1,15 @@
+---
+- 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 }}"
diff --git a/ansible/roles/cadvisor/tasks/destroy.yml b/ansible/roles/cadvisor/tasks/destroy.yml
new file mode 100644
index 000000000..7b937212e
--- /dev/null
+++ b/ansible/roles/cadvisor/tasks/destroy.yml
@@ -0,0 +1,29 @@
+---
+- 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] }}"
diff --git a/ansible/roles/cadvisor/tasks/main.yml b/ansible/roles/cadvisor/tasks/main.yml
new file mode 100644
index 000000000..b017e8b4a
--- /dev/null
+++ b/ansible/roles/cadvisor/tasks/main.yml
@@ -0,0 +1,2 @@
+---
+- include: "{{ action }}.yml"
diff --git a/ansible/roles/cadvisor/tasks/pull.yml b/ansible/roles/cadvisor/tasks/pull.yml
new file mode 100644
index 000000000..5800ef342
--- /dev/null
+++ b/ansible/roles/cadvisor/tasks/pull.yml
@@ -0,0 +1,10 @@
+---
+- 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'
diff --git a/ansible/roles/cadvisor/tasks/reconfigure.yml b/ansible/roles/cadvisor/tasks/reconfigure.yml
new file mode 120000
index 000000000..0412f9220
--- /dev/null
+++ b/ansible/roles/cadvisor/tasks/reconfigure.yml
@@ -0,0 +1 @@
+deploy.yml
\ No newline at end of file
diff --git a/ansible/roles/cadvisor/tasks/upgrade.yml b/ansible/roles/cadvisor/tasks/upgrade.yml
new file mode 100644
index 000000000..8459b03ca
--- /dev/null
+++ b/ansible/roles/cadvisor/tasks/upgrade.yml
@@ -0,0 +1,3 @@
+---
+- include: pull.yml
+- include: deploy.yml