Apache - mod_passenger: allow setting PassengerMinInstances

Author: Steven Post

manifests/mod/passenger.pp

@@ -11,6 +11,7 @@
   $passenger_ruby                 = $::apache::params::passenger_ruby,
   $passenger_default_ruby         = $::apache::params::passenger_default_ruby,
   $passenger_max_pool_size        = undef,
+  $passenger_min_instances        = undef,
   $passenger_use_global_queue     = undef,
   $passenger_app_env              = undef,
   $mod_package                    = undef,
@@ -56,6 +57,7 @@
   # - $passenger_ruby
   # - $passenger_default_ruby
   # - $passenger_max_pool_size
+  # - $passenger_min_instances
   # - $passenger_high_performance
   # - $passenger_max_requests
   # - $passenger_stat_throttle_rate

spec/classes/mod/passenger_spec.rb

@@ -76,6 +76,12 @@
       end
       it { is_expected.to contain_file('passenger.conf').with_content(/^  PassengerMaxPoolSize 16$/) }
     end
+    describe "with passenger_min_instances => 5" do
+      let :params do
+        { :passenger_min_instances => 5 }
+      end
+      it { is_expected.to contain_file('passenger.conf').with_content(/^  PassengerMinInstances 5$/) }
+    end
     describe "with rack_autodetect => on" do
       let :params do
         { :rack_autodetect => 'on' }

templates/mod/passenger.conf.erb

@@ -16,6 +16,9 @@
   <%- if @passenger_max_pool_size -%>
   PassengerMaxPoolSize <%= @passenger_max_pool_size %>
   <%- end -%>
+  <%- if @passenger_min_instances -%>
+  PassengerMinInstances <%= @passenger_min_instances %>
+  <%- end -%>
   <%- if @passenger_pool_idle_time -%>
   PassengerPoolIdleTime <%= @passenger_pool_idle_time %>
   <%- end -%>