Run ulimit in the init script to prevent errors when /etc/security/…

…limits.d is ignored

This follows the conventions in the official .deb and .rpm packages from elastic/elasticsearch#2059.

See:

  * https://github.com/elasticsearch/elasticsearch/blob/master/src/deb/init.d/elasticsearch#L148-L154
  * https://github.com/elasticsearch/elasticsearch/blob/master/src/rpm/init.d/elasticsearch#L75-L83

This is part of a larger changeset by @chrisroberts in sous-chefs#103.

Closes: sous-chefs#103
Closes: sous-chefs#109

Related: sous-chefs#101
Related: sous-chefs#102

templates/default/elasticsearch.init.erb

@@ -8,10 +8,16 @@
 # config:      <%= node[:elasticsearch][:path][:conf] %>/elasticsearch.yml
 
 # Source networking configuration
+#
 if [ -f /etc/sysconfig/network ]; then source /etc/sysconfig/network; fi
 # Source defaults if found
 if [ -f /etc/default/elasticsearch ]; then source /etc/default/elasticsearch; fi
 
+# Set limits for environments ignoring `/etc/security/limits.d`
+#
+ulimit -n <%= node[:elasticsearch][:limits][:nofile] %>
+ulimit -l <%= node[:elasticsearch][:limits][:memlock] %>
+
 # Exit if networking is not up
 #
 [ "$NETWORKING" = "no" ] && exit