Merge pull request #296 from StackStorm/add_redis

Updates to install redis, so can be used as coordination backend

roles/StackStorm.redis/tasks/main.yml

@@ -0,0 +1,36 @@
+---
+- name: Install redis
+  become: yes
+  package:
+    name: "{{ redis_package }}"
+    state: present
+  register: _task
+  retries: 5
+  delay: 3
+  until: _task is succeeded
+  tags: redis
+
+- name: Allow redis to be controlled by systemd
+  become: yes
+  lineinfile:
+    dest: /etc/redis/redis.conf
+    line: supervised systemd
+  tags: redis
+  when: ansible_facts.os_family == 'Debian' and ansible_facts.distribution_major_version != "16"
+
+- name: Change bind to be ipv4 only if needed
+  become: yes
+  lineinfile:
+    dest: "{{ '/etc/redis.conf' if ansible_facts.os_family == 'RedHat' else '/etc/redis/redis.conf' }}"
+    line: "bind 127.0.0.1"
+    regexp: '^bind '
+  tags: redis
+  when: (ansible_facts["all_ipv6_addresses"] | length == 0)
+
+- name: Ensure redis service is enabled and running
+  become: yes
+  service:
+    name: redis
+    enabled: yes
+    state: started
+  tags: redis

roles/StackStorm.redis/vars/main.yml

@@ -0,0 +1,2 @@
+# Name of redis package to install
+redis_package: "{{ 'redis' if ansible_facts.os_family == 'RedHat' else 'redis-server' }}"

roles/StackStorm.st2/defaults/main.yml

@@ -17,6 +17,12 @@ st2_config: {}
 #    password: random-password123
 #  messaging:
 #    url: amqp://st2:[email protected]:5672//
+# In StackStorm > 3.4 then redis client libraries are included in the ST2
+# package. And therefore redis can be automatically used by setting st2_config
+# as follows
+#st2_config:
+#  coordination:
+#    url: redis://127.0.0.1:6379
 
 # System user from which st2 will execute local/remote shell actions
 st2_system_user: stanley

stackstorm.yml

@@ -5,6 +5,7 @@
   roles:
     - StackStorm.mongodb
     - StackStorm.rabbitmq
+    - StackStorm.redis
     - StackStorm.st2repo
     - StackStorm.st2
     - StackStorm.nginx