Install redis retention module

Change-Id: I1cd1f336e50d7849c0cfa64823b33eaad266b31e

docker-compose.yml

@@ -18,6 +18,7 @@ alignak:
   links:
     - mongo
     - influxdb
+    - redis
   ports:
     - "7767:7767"
   environment:
@@ -41,6 +42,9 @@ influxdb:
     - "8083:8083"
     - "8086:8086"
 
+redis:
+  image: redis
+
 grafana:
   image: savoirfairelinux/grafana:2.1.0-pre1
   environment:

tools/docker/alignak_container/etc/alignak/modules/retention-redis.cfg

@@ -0,0 +1,10 @@
+## Module:      RedisRetention
+## Loaded by:   Scheduler
+# Retention file to keep state between process restarts in resident memory.
+# Data loss occurs if the server restarts and Redis replication is not enabled
+# between two Redis instances.
+define module {
+    module_name     redis-retention
+    module_type     redis_retention
+    server          redis
+}

tools/docker/alignak_container/etc/alignak/schedulers/scheduler-master.cfg

@@ -32,7 +32,7 @@ define scheduler {
     #                         (does not save, only read)
     # - SnmpBooster             = Snmp bulk polling module
     #modules   pickle-retention-file
-    modules mongo_live_config
+    modules mongo_live_config, redis-retention
 
     ## Advanced Features
     # Realm is for multi-datacenters