Sysctl systemd changes

README.md

@@ -420,6 +420,14 @@ Default: empty
 
 Configure logrotate rules for redis server. Default: true
 
+##### `redis_maxopenfiles`
+
+Systemd LimitNOFILE change to allow redis change maxclients. Default: 12288
+
+##### `redis_somaxconn`
+
+Sysctl change to allow redis change TCP backlog. Default: 1024
+
 ##### High Availability Options
 
 ##### `slaveof`

manifests/server.pp

@@ -171,6 +171,8 @@
   $cluster_require_full_coverage = true,
   $protected_mode                = undef,
   $include                       = [],
+  $redis_maxopenfiles            = 12288,
+  $redis_somaxconn               = 1024,
 ) {
   include redis::install
 
@@ -288,13 +290,20 @@
     }
   }
 
+  exec { 'sysctl_redis':
+    command  => "sysctl -w net.core.somaxconn=${redis_somaxconn}",
+    path     => '/usr/bin:/usr/sbin:/bin',
+    provider => shell,
+    onlyif   => "test `sysctl -n net.core.somaxconn` -lt ${redis_somaxconn}",
+  }
+
   # manage redis service
   service { "redis-server_${redis_name}":
     ensure     => $running,
     enable     => $enabled,
     hasstatus  => true,
     hasrestart => true,
-    require    => File[$service_file],
-    subscribe  => File[$conf_file],
+    require    => [File[$service_file],Exec['sysctl_redis']],
+    subscribe  => [File[$conf_file],Exec['sysctl_redis']],
   }
 }

templates/systemd/redis.service.erb

@@ -16,6 +16,7 @@ ExecStart=/usr/bin/redis-server <%= @redis_run_dir %>/<%= @conf_file_name %> --d
 ExecStop=/usr/bin/redis-cli -p <%= @redis_port %> shutdown
 User=<%= @redis_user or 'root' %>
 Group=<%= @redis_group or 'root' %>
+LimitNOFILE=<%= @redis_maxopenfiles %>
 
 [Install]
 WantedBy=multi-user.target