Redis: proetcted-mode is supported in Redis 3.2+

redis/defaults/main.yml

@@ -31,6 +31,7 @@ redis_maxmemory_samples: 5
 redis_appendonly: "no"
 redis_appendfsync: "everysec"
 
+# Supported only in Redis 3.2+
 redis_protected_mode: "yes"
 
 # Add extra include files for local configuration/overrides.

redis/tasks/main.yml

@@ -10,6 +10,16 @@
     - redis
     - packages
 
+- name: Get Redis version
+  shell: "redis-server -v | grep -Eo '(v=\\S+)' | cut -d'=' -f 2 | grep -E '^([0-9]|\\.)+$"
+  changed_when: false
+  check_mode: no
+  register: _redis_installed_version
+
+- set_fact:
+    redis_installed_version: "{{ _redis_installed_version.stdout }}"
+  check_mode: no
+
 - name: Redis is configured.
   template:
     src: redis.conf.j2

redis/templates/redis.conf.j2

@@ -32,7 +32,9 @@ rdbcompression {{ redis_rdbcompression }}
 dbfilename {{ redis_dbfilename }}
 dir {{ redis_dbdir }}
 
+{% if redis_installed_version | version_compare('3.2', '>=') %}
 protected-mode {{ redis_protected_mode }}
+{% endif %}
 
 # maxclients 128