Add Ansible role for memcached

Note, this is not in the inventories/site.yml as it will be a
transparent dependency of Swift.

Change-Id: Ic8c80072596594e646ece74ac0ce74c7000398ff
Partitially-Implements: blueprint ansible-swift

ansible/group_vars/all.yml

@@ -89,6 +89,8 @@ neutron_server_port: "9696"
 
 cinder_api_port: "8776"
 
+memcached_port: "11211"
+
 
 ####################
 # Openstack options

ansible/inventory/all-in-one

@@ -38,6 +38,9 @@ network
 [cinder:children]
 control
 
+[memcached:children]
+control
+
 
 # Additional control implemented here. These groups allow you to control which
 # services run on which hosts at a per-service level.

ansible/inventory/multinode

@@ -44,6 +44,9 @@ network
 [cinder:children]
 control
 
+[memcached:children]
+control
+
 
 # Additional control implemented here. These groups allow you to control which
 # services run on which hosts at a per-service level.

ansible/roles/memcached/defaults/main.yml

@@ -0,0 +1,9 @@
+---
+project_name: "memcached"
+
+####################
+# Docker
+####################
+memcached_image: "{{ docker_registry ~ '/' if docker_registry else '' }}{{ docker_namespace }}/{{ kolla_base_distro }}-{{ kolla_install_type }}-memcached"
+memcached_tag: "{{ openstack_release }}"
+memcached_image_full: "{{ memcached_image }}:{{ memcached_tag }}"

ansible/roles/memcached/tasks/config.yml

@@ -0,0 +1,11 @@
+---
+- name: Ensuring config directory exists
+  file:
+    path: "{{ node_config_directory }}/memcached/"
+    state: "directory"
+    recurse: "yes"
+
+- name: Copying over config(s)
+  template:
+    src: "memcached.conf.j2"
+    dest: "{{ node_config_directory }}/memcached/memcached.conf"

ansible/roles/memcached/tasks/main.yml

@@ -0,0 +1,4 @@
+---
+- include: config.yml
+
+- include: start.yml

ansible/roles/memcached/tasks/start.yml

@@ -0,0 +1,19 @@
+---
+- name: Starting memcached container
+  docker:
+    docker_api_version: "{{ docker_api_version }}"
+    net: host
+    pull: "{{ docker_pull_policy }}"
+    restart_policy: "{{ docker_restart_policy }}"
+    restart_policy_retry: "{{ docker_restart_policy_retry }}"
+    state: reloaded
+    registry: "{{ docker_registry }}"
+    username: "{{ docker_registry_username }}"
+    password: "{{ docker_registry_password }}"
+    insecure_registry: "{{ docker_insecure_registry }}"
+    name: memcached
+    image: "{{ memcached_image_full }}"
+    volumes: "{{ node_config_directory }}/memcached/:/opt/kolla/memcached/:ro"
+    env:
+      KOLLA_CONFIG_STRATEGY: "{{ config_strategy }}"
+  when: inventory_hostname in groups['memcached']

ansible/roles/memcached/templates/memcached.conf.j2

@@ -0,0 +1 @@
+OPTIONS="-l {{ hostvars[inventory_hostname]['ansible_' + api_interface]['ipv4']['address'] }} -p {{ memcached_port }}"

docker/common/memcached/config-external.sh

@@ -1,7 +1,7 @@
 #!/bin/bash
-SOURCE="/opt/kolla/memcached/memcached"
-TARGET="/etc/sysconfig/memcached"
-OWNER="swift"
+SOURCE="/opt/kolla/memcached/memcached.conf"
+TARGET="/etc/memcached.conf"
+OWNER="memcached"
 
 if [[ -f "$SOURCE" ]]; then
     cp $SOURCE $TARGET

docker/common/memcached/start.sh

@@ -11,4 +11,6 @@ source /opt/kolla/kolla-common.sh
 # Execute config strategy
 set_configs
 
-exec $CMD $ARGS
+source /etc/memcached.conf
+
+exec $CMD $ARGS $OPTIONS