Conform cgroups to systemd based services

Update cgroups configuration to be running on ubuntu 16.04.
Remove "cgroup-lite" package/service since systemd
mounts cgroups sanely itself.

Change-Id: I250f1ba92fbe1ceac415a73b640fd00d6e2898e4
Closes-Bug: #1669747

deployment/puppet/cgroups/files/cgconfig.init

@@ -0,0 +1,66 @@
+#!/bin/sh
+### BEGIN INIT INFO
+# Provides:          cgconfig
+# Required-Start:    $remote_fs $syslog
+# Required-Stop:     $remote_fs $syslog
+# Should-Start:
+# Should-Stop:
+# Default-Start:     2 3 4 5
+# Default-Stop:      0 1 6
+# Short-Description: Configures CGroups
+### END INIT INFO
+
+start_service() {
+  if is_running; then
+    echo "cgrulesengd is running already!"
+    return 1
+  else
+    echo "Processing /etc/cgconfig.conf ..."
+    cgconfigparser -l /etc/cgconfig.conf
+    echo "Processing /etc/cgrules.conf ..."
+    cgrulesengd -vvv --logfile=/var/log/cgrulesengd.log
+    return 0
+  fi
+}
+
+stop_service() {
+  if is_running; then
+    echo "Stopping cgrulesengd ..."
+    pkill cgrulesengd
+  else
+    echo "cgrulesengd is not running!"
+    return 1
+  fi
+}
+
+status() {
+  if pgrep cgrulesengd > /dev/null; then
+    echo "cgrulesengd is running"
+    return 0
+  else
+    echo "cgrulesengd is not running!"
+    return 3
+  fi
+}
+
+is_running() {
+  status >/dev/null 2>&1
+}
+
+case "${1:-}" in
+  start)
+    start_service
+    ;;
+  stop)
+    stop_service
+    ;;
+  status)
+    status
+    ;;
+  *)
+    echo "Usage: /etc/init.d/cgconfig {start|stop|restart|status}"
+    exit 2
+    ;;
+esac
+
+exit $?

deployment/puppet/cgroups/manifests/init.pp

@@ -13,51 +13,40 @@
 class cgroups(
   $cgroups_set = {},
   $packages    = $cgroups::params::packages,
-)
+) inherits cgroups::params {
-  inherits cgroups::params
+
-{
   validate_hash($cgroups_set)
   ensure_packages($packages, { tag => 'cgroups' })
 
-
   File {
     ensure => file,
     owner  => 'root',
     group  => 'root',
     mode   => '0644',
+    notify => Service['cgconfig'],
   }
 
   file { '/etc/cgconfig.conf':
     content => template('cgroups/cgconfig.conf.erb'),
-    notify  => Service['cgconfigparser'],
     tag     => 'cgroups',
   }
 
   file { '/etc/cgrules.conf':
     content => template('cgroups/cgrules.conf.erb'),
-    notify  => Service['cgrulesengd'],
     tag     => 'cgroups',
   }
 
+  file { '/etc/init.d/cgconfig':
+    mode   => '0755',
+    source => "puppet:///modules/${module_name}/cgconfig.init",
+    tag    => 'cgroups',
+  }
+
   class { '::cgroups::service':
     cgroups_settings => $cgroups_set,
   }
 
-  Package <| tag == 'cgroups' |> ~>
+  Package <| tag == 'cgroups' |> -> File <| tag == 'cgroups' |>
-  Service['cgrulesengd']
+  Service['cgconfig'] -> Cgclassify <||>
 
-  Package <| tag == 'cgroups' |> ->
-  File <| tag == 'cgroups' |>
-
-  File <| tag == 'cgroups' |> ->
-  Service['cgroup-lite']
-
-  Service['cgroup-lite'] ->
-  Service['cgconfigparser']
-
-  Service['cgconfigparser'] ->
-  Cgclassify <||>
-
-  Cgclassify <||> ->
-  Service['cgrulesengd']
 }

deployment/puppet/cgroups/manifests/params.pp

@@ -2,10 +2,11 @@ class cgroups::params {
 
   case $::osfamily {
     'Debian': {
-      $packages = ['cgroup-bin', 'libcgroup1', 'cgroup-upstart']
+      $packages = ['cgroup-bin', 'libcgroup1']
     }
     default: {
       fail("Unsupported platform")
     }
   }
+
 }

deployment/puppet/cgroups/manifests/service.pp

@@ -1,26 +1,16 @@
 class cgroups::service (
   $cgroups_settings = {},
-)
+) {
-{
-  service { 'cgroup-lite':
-    ensure => running,
-    enable => true,
-  }
 
-  service { 'cgconfigparser':
+  service { 'cgconfig':
-    ensure    => running,
+    ensure   => running,
-    hasstatus => false,
+    enable   => true,
-    status    => '/bin/true',
+    provider => 'init',
-    restart   => 'service cgconfigparser restart',
-    require   => Service['cgroup-lite'],
-  }
-
-  service { 'cgrulesengd':
-    ensure => running,
   }
 
   $cgclass_res = map_cgclassify_opts($cgroups_settings)
   unless empty($cgclass_res) {
     create_resources('cgclassify', $cgclass_res, { 'ensure' => present })
   }
+
 }

deployment/puppet/cgroups/spec/classes/cgroups_init_spec.rb

@@ -15,6 +15,7 @@ describe 'cgroups', :type => :class do
         :owner   => 'root',
         :group   => 'root',
         :mode    => '0644',
+        :notify  => 'Service[cgconfig]',
         :tag     => 'cgroups',
       }
     end
@@ -27,7 +28,7 @@ describe 'cgroups', :type => :class do
         :cgroups_settings => params[:cgroups_set])
     }
 
-    %w(libcgroup1 cgroup-bin cgroup-upstart).each do |cg_pkg|
+    %w(libcgroup1 cgroup-bin).each do |cg_pkg|
       it { is_expected.to contain_package(cg_pkg) }
     end
 
@@ -36,7 +37,6 @@ describe 'cgroups', :type => :class do
       it { p catalogue.resource 'file', cg_file }
     end
 
-    it { is_expected.to contain_file('/etc/cgrules.conf').that_notifies('Service[cgrulesengd]') }
+    it { is_expected.to contain_file('/etc/init.d/cgconfig').with(file_defaults.merge({:mode => '0755'})) }
-    it { is_expected.to contain_file('/etc/cgconfig.conf').that_notifies('Service[cgconfigparser]') }
   end
 end

deployment/puppet/cgroups/spec/classes/cgroups_service_spec.rb

@@ -9,8 +9,6 @@ describe 'cgroups::service', :type => :class do
       }
     end
 
-    %w(cgroup-lite cgconfigparser cgrulesengd).each do |cg_service|
+    it { is_expected.to contain_service('cgconfig') }
-      it { is_expected.to contain_service(cg_service) }
-    end
   end
 end