Ensure init script is linked into rc.d

Also make sure that a daemonized sentinel properly produces
a pid file so the init script can stop the sentinel.

manifests/params.pp

@@ -47,6 +47,7 @@
   $sentinel_service_name       = 'redis-sentinel'
   $sentinel_working_dir        = '/tmp'
   $sentinel_init_template      = 'redis/redis-sentinel.init.erb'
+  $sentinel_pid_file           = '/var/run/redis/redis-sentinel.pid'
   $set_max_intset_entries      = 512
   $slowlog_log_slower_than     = 10000
   $slowlog_max_len             = 1024

manifests/sentinel.pp

@@ -84,6 +84,11 @@
 #
 #   Default: 1
 #
+# [*pid_file*]
+#   If sentinel is daemonized it will write its pid at this location.
+#
+#   Default: /var/run/redis/redis-sentinel.pid
+#
 # [*quorum*]
 #   Number of sentinels that must agree that a master is down to
 #   signal sdown state.
@@ -144,6 +149,7 @@
   $package_name      = $::redis::params::sentinel_package_name,
   $package_ensure    = $::redis::params::sentinel_package_ensure,
   $parallel_sync     = $::redis::params::sentinel_parallel_sync,
+  $pid_file          = $::redis::params::sentinel_pid_file,
   $quorum            = $::redis::params::sentinel_quorum,
   $sentinel_port     = $::redis::params::sentinel_port,
   $service_group     = $::redis::params::service_group,
@@ -185,6 +191,10 @@
         content => template($init_template),
         require => Package[$package_name];
     }
+    exec {
+       "/usr/sbin/update-rc.d redis-sentinel defaults":
+         require => File[$init_script];
+    }
   }
 
   service { $service_name:

spec/classes/redis_sentinel_spec.rb

@@ -4,6 +4,8 @@
 port 26379
 dir /tmp
 daemonize yes
+pidfile /var/run/redis/redis-sentinel.pid
+
 sentinel monitor mymaster 127.0.0.1 6379 2
 sentinel down-after-milliseconds mymaster 30000
 sentinel parallel-syncs mymaster 1
@@ -16,6 +18,8 @@
 port 26379
 dir /tmp
 daemonize yes
+pidfile /var/run/redis/redis-sentinel.pid
+
 sentinel monitor cow 127.0.0.1 6379 2
 sentinel down-after-milliseconds cow 6000
 sentinel parallel-syncs cow 1

templates/redis-sentinel.conf.erb

@@ -1,6 +1,7 @@
 port <%= @sentinel_port %>
 dir <%= @working_dir %>
-<% if @daemonize -%>daemonize yes<% else -%>daemonize no<% end -%>
+<% if @daemonize -%>daemonize yes<% else -%>daemonize no<% end %>
+pidfile <%= @pid_file %>
 
 sentinel monitor <%= @master_name %> <%= @redis_host %> <%= @redis_port %> <%= @quorum %>
 sentinel down-after-milliseconds <%= @master_name %> <%= @down_after %>

templates/redis-sentinel.init.erb

@@ -7,8 +7,8 @@
 # Should-Stop:		$local_fs
 # Default-Start:	2 3 4 5
 # Default-Stop:		0 1 6
-# Short-Description:	redis-server - Persistent key-value db
-# Description:		redis-server - Persistent key-value db
+# Short-Description:	redis-sentinel - Monitor redis-server
+# Description:		redis-sentinel - Monitor redis-server
 ### END INIT INFO