Fix random port being used for EPMD node

Fixes not being able to join a cluster from other nodes, because the
ports are not within the firewall range of allowed ports.

Co-authored-by: Greg Karékinian <greg@karekinian.com>

site-cookbooks/kosmos-ejabberd/recipes/default.rb

@@ -65,15 +65,13 @@ file "/opt/ejabberd/.hosts.erlang" do
   content ejabberd_hostnames.map{|h| "#{h}."}.join("\n")
 end
 
-ruby_block "configure ERLANG_NODE" do
-  block do
-    file = Chef::Util::FileEdit.new("/opt/ejabberd/conf/ejabberdctl.cfg")
-    file.search_file_replace_line(
-      %r{#ERLANG_NODE=ejabberd@localhost},
-      "ERLANG_NODE=ejabberd@#{node['name']}"
-    )
-    file.write_file
-  end
+template "/opt/ejabberd/conf/ejabberdctl.cfg" do
+  source    "ejabberdctl.cfg.erb"
+  mode      0644
+  owner     'ejabberd'
+  group     'ejabberd'
+  variables epmd_node_name: "ejabberd@#{node['name']}"
+  notifies :reload, "service[ejabberd]", :delayed
 end
 
 postgresql_data_bag_item = data_bag_item('credentials', 'postgresql')

site-cookbooks/kosmos-ejabberd/templates/ejabberdctl.cfg.erb

@@ -0,0 +1,175 @@
+#
+# In this file you can configure options that are passed by ejabberdctl
+# to the erlang runtime system when starting ejabberd
+#
+
+#' POLL: Kernel polling ([true|false])
+#
+# The kernel polling option requires support in the kernel.
+# Additionally, you need to enable this feature while compiling Erlang.
+#
+# Default: true
+#
+#POLL=true
+
+#.
+#' SMP: SMP support ([enable|auto|disable])
+#
+# Explanation in Erlang/OTP documentation:
+# enable: starts the Erlang runtime system with SMP support enabled.
+#   This may fail if no runtime system with SMP support is available.
+# auto: starts the Erlang runtime system with SMP support enabled if it
+#   is available and more than one logical processor are detected.
+# disable: starts a runtime system without SMP support.
+#
+# Default: enable
+#
+#SMP=enable
+
+#.
+#' ERL_MAX_PORTS: Maximum number of simultaneously open Erlang ports
+#
+# ejabberd consumes two or three ports for every connection, either
+# from a client or from another Jabber server. So take this into
+# account when setting this limit.
+#
+# Default: 32000
+# Maximum: 268435456
+#
+#ERL_MAX_PORTS=32000
+
+#.
+#' FIREWALL_WINDOW: Range of allowed ports to pass through a firewall
+#
+# If Ejabberd is configured to run in cluster, and a firewall is blocking ports,
+# it's possible to make Erlang use a defined range of port (instead of dynamic
+# ports) for node communication.
+#
+# Default: not defined
+# Example: 4200-4210
+#
+FIREWALL_WINDOW=4200-4210
+
+#.
+#' INET_DIST_INTERFACE: IP address where this Erlang node listens other nodes
+#
+# This communication is used by ejabberdctl command line tool,
+# and in a cluster of several ejabberd nodes.
+#
+# Default: 0.0.0.0
+#
+#INET_DIST_INTERFACE=127.0.0.1
+
+#.
+#' ERL_EPMD_ADDRESS: IP addresses where epmd listens for connections
+#
+# IMPORTANT: This option works only in Erlang/OTP R14B03 and newer.
+#
+# This environment variable may be set to a comma-separated
+# list of IP addresses, in which case the epmd daemon
+# will listen only on the specified address(es) and on the
+# loopback address (which is implicitly added to the list if it
+# has not been specified). The default behaviour is to listen on
+# all available IP addresses.
+#
+# Default: 0.0.0.0
+#
+#ERL_EPMD_ADDRESS=127.0.0.1
+
+#.
+#' ERL_PROCESSES: Maximum number of Erlang processes
+#
+# Erlang consumes a lot of lightweight processes. If there is a lot of activity
+# on ejabberd so that the maximum number of processes is reached, people will
+# experience greater latency times. As these processes are implemented in
+# Erlang, and therefore not related to the operating system processes, you do
+# not have to worry about allowing a huge number of them.
+#
+# Default: 250000
+# Maximum: 268435456
+#
+#ERL_PROCESSES=250000
+
+#.
+#' ERL_MAX_ETS_TABLES: Maximum number of ETS and Mnesia tables
+#
+# The number of concurrent ETS and Mnesia tables is limited. When the limit is
+# reached, errors will appear in the logs:
+#   ** Too many db tables **
+# You can safely increase this limit when starting ejabberd. It impacts memory
+# consumption but the difference will be quite small.
+#
+# Default: 1400
+#
+#ERL_MAX_ETS_TABLES=1400
+
+#.
+#' ERL_OPTIONS: Additional Erlang options
+#
+# The next variable allows to specify additional options passed to erlang while
+# starting ejabberd. Some useful options are -noshell, -detached, -heart. When
+# ejabberd is started from an init.d script options -noshell and -detached are
+# added implicitly. See erl(1) for more info.
+#
+# It might be useful to add "-pa /usr/local/lib/ejabberd/ebin" if you
+# want to add local modules in this path.
+#
+# Default: ""
+#
+#ERL_OPTIONS=""
+
+#.
+#' ERLANG_NODE: Erlang node name
+#
+# The next variable allows to explicitly specify erlang node for ejabberd
+# It can be given in different formats:
+# ERLANG_NODE=ejabberd
+#   Lets erlang add hostname to the node (ejabberd uses short name in this case)
+# ERLANG_NODE=ejabberd@hostname
+#   Erlang uses node name as is (so make sure that hostname is a real
+#   machine hostname or you'll not be able to control ejabberd)
+# ERLANG_NODE=ejabberd@hostname.domainname
+#   The same as previous, but erlang will use long hostname
+#   (see erl (1) manual for details)
+#
+# Default: ejabberd@localhost
+#
+ERLANG_NODE=<%= @epmd_node_name %>
+
+#.
+#' EJABBERD_PID_PATH: ejabberd PID file
+#
+# Indicate the full path to the ejabberd Process identifier (PID) file.
+# If this variable is defined, ejabberd writes the PID file when starts,
+# and deletes it when stops.
+# Remember to create the directory and grant write permission to ejabberd.
+#
+# Default: don't write PID file
+#
+#EJABBERD_PID_PATH=/var/run/ejabberd/ejabberd.pid
+
+#.
+#' CONTRIB_MODULES_PATH: contributed ejabberd modules path
+#
+# Specify the full path to the contributed ejabberd modules. If the path is not
+# defined, ejabberd will use ~/.ejabberd-modules in home of user running ejabberd.
+#
+# Default: $HOME/.ejabberd-modules
+#
+#CONTRIB_MODULES_PATH=/opt/ejabberd-modules
+
+#.
+#' CONTRIB_MODULES_CONF_DIR: configuration directory for contributed modules
+#
+# Specify the full path to the configuration directory for contributed ejabberd
+# modules. In order to configure a module named mod_foo, a mod_foo.yml file can
+# be created in this directory. This file will then be used instead of the
+# default configuration file provided with the module.
+#
+# Default: $CONTRIB_MODULES_PATH/conf
+#
+#CONTRIB_MODULES_CONF_DIR=/etc/ejabberd/modules
+
+#.
+#'
+# vim: foldmarker=#',#. foldmethod=marker: