A redis server role.

playbooks/roles/redis/defaults/main.yml

+---
+#
+# edX Configuration
+#
+# github:     https://github.com/edx/configuration
+# wiki:       https://github.com/edx/configuration/wiki
+# code style: https://github.com/edx/configuration/wiki/Ansible-Coding-Conventions
+# license:    https://github.com/edx/configuration/blob/master/LICENSE.TXT
+#
+##
+# Defaults for role redis
+# 
+REDIS_PASSWORD: !!null
+REDIS_BIND_IP: 127.0.0.1
+REDIS_PERSISTENCE_DIR: "/var/lib/redis"
+REDIS_MEMORY_LIMIT: "512mb"
+REDIS_MAX_MEMORY_POLICY: "noeviction"
+#
+# vars are namespace with the module name.
+#
+redis_role_name: redis
+redis_ppa: "ppa:rwky/redis"
+
+redis_user: redis
+redis_group: redis
+
+#
+# OS packages
+#
+
+redis_debian_pkgs:
+  - "redis-server=2:2.8.10-rwky1~precise"
+
+redis_redhat_pkgs: []

playbooks/roles/redis/handlers/main.yml

+---
+#
+# edX Configuration
+#
+# github:     https://github.com/edx/configuration
+# wiki:       https://github.com/edx/configuration/wiki
+# code style: https://github.com/edx/configuration/wiki/Ansible-Coding-Conventions
+# license:    https://github.com/edx/configuration/blob/master/LICENSE.TXT
+#
+#
+#
+# Handlers for role redis
+# 
+# Overview:
+# 
+#
+- name: reload redis
+  service: name=redis-server state=restarted

playbooks/roles/redis/meta/main.yml

+---
+#
+# edX Configuration
+#
+# github:     https://github.com/edx/configuration
+# wiki:       https://github.com/edx/configuration/wiki
+# code style: https://github.com/edx/configuration/wiki/Ansible-Coding-Conventions
+# license:    https://github.com/edx/configuration/blob/master/LICENSE.TXT
+#
+##
+# Role includes for role redis
+# 
+# Example:
+#
+# dependencies:
+#   - {
+#   role: my_role 
+#   my_role_var0: "foo"
+#   my_role_var1: "bar"
+# }
+
+dependencies:
+  - common

playbooks/roles/redis/tasks/main.yml

+---
+#
+# edX Configuration
+#
+# github:     https://github.com/edx/configuration
+# wiki:       https://github.com/edx/configuration/wiki
+# code style: https://github.com/edx/configuration/wiki/Ansible-Coding-Conventions
+# license:    https://github.com/edx/configuration/blob/master/LICENSE.TXT
+#
+#
+#
+# Tasks for role redis
+# 
+# Overview:
+# 
+#
+# Dependencies:
+#
+# 
+# Example play:
+#
+#
+
+- name: add the redis ppa
+  apt_repository: repo="{{ redis_ppa }}"
+
+- name: install redis system packages
+  apt: pkg={{ item }} install_recommends=yes state=present
+  with_items: redis_debian_pkgs
+  notify: reload redis
+
+- name: ensure the redis group exists
+  group: name={{ redis_group }} state=present
+
+- name: ensure the redis user exists
+  user: name={{ redis_user }} append=yes group={{ redis_group }}
+
+- name: update redis configuration
+  template: >
+    src=etc/redis/redis.conf.j2
+    dest=/etc/redis/redis.conf
+    owner=root
+    group={{ redis_group }}
+    mode=640
+  notify: reload redis
+