Fix redis_sentinel container restarts

Redis Sentinel modifies its config.
Since we now check config in check-containers,
the redis_sentintel container is restarted each time.

This patch together with kolla patch fixes this issue.

Closes-Bug: #1967664
Depends-On: https://review.opendev.org/c/openstack/kolla/+/840954
Change-Id: Ia76329cb851d266cd888f51b7f70a4cdc40e3ac3

ansible/roles/redis/defaults/main.yml

@@ -11,6 +11,9 @@ redis_services:
   redis-sentinel:
     container_name: redis_sentinel
     group: redis
+    environment:
+      REDIS_CONF: "{{ redis_conf_path }}"
+      REDIS_GEN_CONF: "{{ redis_generated_conf_path }}"
     enabled: true
     image: "{{ redis_sentinel_image_full }}"
     volumes: "{{ redis_sentinel_default_volumes + redis_sentinel_extra_volumes }}"
@@ -70,3 +73,6 @@ redis_sentinel_default_volumes:
 
 redis_extra_volumes: "{{ default_extra_volumes }}"
 redis_sentinel_extra_volumes: "{{ default_extra_volumes }}"
+
+redis_conf_path: "/etc/redis/redis.conf"
+redis_generated_conf_path: "/etc/redis/redis-regenerated-by-config-rewrite.conf"

ansible/roles/redis/handlers/main.yml

@@ -25,6 +25,7 @@
     common_options: "{{ docker_common_options }}"
     name: "{{ service.container_name }}"
     image: "{{ service.image }}"
+    environment: "{{ service.environment }}"
     volumes: "{{ service.volumes }}"
     dimensions: "{{ service.dimensions }}"
     healthcheck: "{{ service.healthcheck | default(omit) }}"

ansible/roles/redis/tasks/check-containers.yml

@@ -6,6 +6,7 @@
     common_options: "{{ docker_common_options }}"
     name: "{{ item.value.container_name }}"
     image: "{{ item.value.image }}"
+    environment: "{{ item.environment | default(omit) }}"
     volumes: "{{ item.value.volumes }}"
     dimensions: "{{ item.value.dimensions }}"
     healthcheck: "{{ item.value.healthcheck | default(omit) }}"

ansible/roles/redis/templates/redis-sentinel.json.j2

@@ -1,9 +1,9 @@
 {
-    "command": "redis-sentinel /etc/redis/redis.conf",
+    "command": "redis-sentinel {{ redis_generated_conf_path }}",
     "config_files": [
         {
             "source": "{{ container_config_directory }}/redis.conf",
-            "dest": "/etc/redis/redis.conf",
+            "dest": "{{ redis_conf_path }}",
             "owner": "redis",
             "perm": "0600"
         }
@@ -13,6 +13,10 @@
             "path": "/var/log/kolla/redis",
             "owner": "redis:redis",
             "recurse": true
+        },
+        {
+            "path": "/etc/redis",
+            "owner": "redis:redis"
         }
     ]
 }

ansible/roles/redis/templates/redis.json.j2

@@ -1,9 +1,9 @@
 {
-    "command": "redis-server /etc/redis/redis.conf",
+    "command": "redis-server {{ redis_conf_path }}",
     "config_files": [
         {
             "source": "{{ container_config_directory }}/redis.conf",
-            "dest": "/etc/redis/redis.conf",
+            "dest": "{{ redis_conf_path }}",
             "owner": "redis",
             "perm": "0600"
         }