Add CentOS 8 support

The main differences for CentOS 8 are:
* There is now a new collectd-utils package containing collectdctl
* collectd-python is now a seperate sub package
* python is python3.
* pip command is now pip3
* The rabbitmq plugin no longer works due to lack of python3 support

The python_dir fact will fall back to `/usr/libexec/platform-python`
if `python3` does not exist on the path. This is the python
that collectd is built against and significantly requires.

Note that setting `collectd::ci_package_repo` true will currently
result in yum being configured with a non existant repo since
https://pkg.ci.collectd.org/rpm/ does not exist
for 8.

collectd/collectd-ci#35

.sync.yml

@@ -4,6 +4,7 @@
     - set: ubuntu1604-64
     - set: ubuntu1804-64
     - set: centos7-64
+    - set: centos8-64
     - set: debian8-64
   secure: "FAK3Izs5bSZyblGvcFnGWm0exZV5+v9pbwfRDD2oihWxX3U3pArGW+3XcwcJfLQgrUYBsOTmHC8yPjlgTBYeIt/5pvg9X+3jwNgeto6kozpI/nvAq4NtcHhzxRejuPELhFYeXZ3hEw0w+v/ZRo2cNLwI0LLpiWEDvCMZN1CJ2RY="
 spec/spec_helper.rb:

.travis.yml

@@ -46,6 +46,14 @@ matrix:
     bundler_args: --without development release
     env: PUPPET_INSTALL_TYPE=agent BEAKER_PUPPET_COLLECTION=puppet6 BEAKER_debug=true BEAKER_setfile=centos7-64 BEAKER_HYPERVISOR=docker CHECK=beaker
     services: docker
+  - rvm: 2.5.3
+    bundler_args: --without development release
+    env: PUPPET_INSTALL_TYPE=agent BEAKER_PUPPET_COLLECTION=puppet5 BEAKER_debug=true BEAKER_setfile=centos8-64 BEAKER_HYPERVISOR=docker CHECK=beaker
+    services: docker
+  - rvm: 2.5.3
+    bundler_args: --without development release
+    env: PUPPET_INSTALL_TYPE=agent BEAKER_PUPPET_COLLECTION=puppet6 BEAKER_debug=true BEAKER_setfile=centos8-64 BEAKER_HYPERVISOR=docker CHECK=beaker
+    services: docker
   - rvm: 2.5.3
     bundler_args: --without development release
     env: PUPPET_INSTALL_TYPE=agent BEAKER_PUPPET_COLLECTION=puppet5 BEAKER_debug=true BEAKER_setfile=debian8-64 BEAKER_HYPERVISOR=docker CHECK=beaker

README.md

@@ -1622,6 +1622,8 @@ You will need to add this to [collectd::config::typesdb](https://github.com/voxp
 via hiera or in a manifest. Failure to set the types.db.custom content will
 result in *no* metrics from the rabbitmq plugin.
 
+The rabbitmq plugin has not been ported to python3 and will fail on CentOS 8 [#75](https://github.com/nytimes/collectd-rabbitmq/issues/75)
+
 set typesdb to include the collectd-rabbitmq types.db.custom
 
 ```yaml

lib/facter/python_dir.rb

@@ -16,6 +16,8 @@
       else
         Facter::Util::Resolution.exec('python3 -c "import site; print(site.getsitepackages()[0])"')
       end
+    elsif File.exist?('/usr/libexec/platform-python')
+      Facter::Util::Resolution.exec('/usr/libexec/platform-python -c "from distutils.sysconfig import get_python_lib; print(get_python_lib())"')
     else
       ''
     end

manifests/params.pp

@@ -71,7 +71,10 @@
       $config_file        = '/etc/collectd.conf'
       $config_group       = 'root'
       $java_dir           = '/usr/share/collectd/java'
-      $default_python_dir = '/usr/lib/python2.7/site-packages'
+      $default_python_dir = $facts['os']['release']['major'] ? {
+        '7'     => '/usr/lib/python2.7/site-packages',
+        default => '/usr/lib/python3.6/site-packages',
+      }
       $manage_repo        = true
       $package_configs    = {
         ovs_events => 'ovs-events.conf',

manifests/plugin/cuda.pp

@@ -12,28 +12,45 @@
 # @param provider_proxy Optional[String] Proxy for provider. Default: undef
 class collectd::plugin::cuda (
   Optional[String] $ensure           = 'present',
-  Optional[Boolean] $manage_package   = undef,
+  Optional[Boolean] $manage_package  = undef,
   Optional[String] $package_name     = 'collectd-cuda',
-  Optional[String] $package_provider = 'pip',
+  Optional[String] $package_provider = undef,
   Optional[String] $provider_proxy   = undef,
 ) {
   include collectd
 
   $_manage_package = pick($manage_package, $collectd::manage_package)
+  if $facts['os']['family'] == 'RedHat' and $facts['os']['release']['major'] == '8' {
+    $_python_pip_package = 'python3-pip'
+    if $package_provider =~ Undef {
+      $_package_provider = 'pip3'
+    }
+    else {
+      $_package_provider = $package_provider
+    }
+  } else {
+    $_python_pip_package = 'python-pip'
+    if $package_provider =~ Undef {
+      $_package_provider = 'pip'
+    }
+    else {
+      $_package_provider = $package_provider
+    }
+  }
 
   if ($_manage_package) {
-    if (!defined(Package['python-pip'])) {
-      package { 'python-pip': ensure => 'present', }
+    if (!defined(Package[$_python_pip_package])) {
+      package { $_python_pip_package: ensure => 'present', }
 
       Package[$package_name] {
-        require => Package['python-pip'],
+        require => Package[$_python_pip_package],
       }
 
       if $facts['os']['family'] == 'RedHat' {
         # Epel is installed in install.pp if manage_repo is true
         # python-pip doesn't exist in base for RedHat. Need epel installed first
         if (defined(Class['::epel'])) {
-          Package['python-pip'] {
+          Package[$_python_pip_package] {
             require => Class['::epel'],
           }
         }
@@ -49,7 +66,7 @@
 
   package { $package_name:
     ensure          => $ensure,
-    provider        => $package_provider,
+    provider        => $_package_provider,
     install_options => $install_options,
   }
 

manifests/plugin/iscdhcp.pp

@@ -11,28 +11,46 @@
 # @param provider_proxy Optional[String] Proxy for provider. Default: undef
 class collectd::plugin::iscdhcp (
   Optional[String] $ensure           = 'present',
-  Optional[Boolean] $manage_package   = undef,
+  Optional[Boolean] $manage_package  = undef,
   Optional[String] $package_name     = 'collectd-iscdhcp',
-  Optional[String] $package_provider = 'pip',
+  Optional[String] $package_provider = undef,
   Optional[String] $provider_proxy   = undef,
 ) {
   include collectd
 
   $_manage_package = pick($manage_package, $collectd::manage_package)
 
+  if $facts['os']['family'] == 'RedHat' and $facts['os']['release']['major'] == '8' {
+    $_python_pip_package = 'python3-pip'
+    if $package_provider =~ Undef {
+      $_package_provider = 'pip3'
+    }
+    else {
+      $_package_provider = $package_provider
+    }
+  } else {
+    $_python_pip_package = 'python-pip'
+    if $package_provider =~ Undef {
+      $_package_provider = 'pip'
+    }
+    else {
+      $_package_provider = $package_provider
+    }
+  }
+
   if ($_manage_package) {
-    if (!defined(Package['python-pip'])) {
-      package { 'python-pip': ensure => 'present', }
+    if (!defined(Package[$_python_pip_package])) {
+      package { $_python_pip_package: ensure => 'present', }
 
       Package[$package_name] {
-        require => Package['python-pip'],
+        require => Package[$_python_pip_package],
       }
 
       if $facts['os']['family'] == 'RedHat' {
         # Epel is installed in install.pp if manage_repo is true
         # python-pip doesn't exist in base for RedHat. Need epel installed first
         if (defined(Class['::epel'])) {
-          Package['python-pip'] {
+          Package[$_python_pip_package] {
             require => Class['::epel'],
           }
         }
@@ -48,7 +66,7 @@
 
   package { $package_name:
     ensure          => $ensure,
-    provider        => $package_provider,
+    provider        => $_package_provider,
     install_options => $install_options,
   }
 

manifests/plugin/python.pp

@@ -32,11 +32,17 @@
     $ensure_real = 'absent'
   }
 
-  if $facts['os']['name'] == 'Fedora' or $facts['os']['name'] == 'Amazon' {
+  if $facts['os']['name'] == 'Amazon' or
+      ($facts['os']['family'] == 'RedHat' and versioncmp($facts['os']['release']['major'],'8') >= 0) {
     if $_manage_package {
       package { 'collectd-python':
         ensure => $ensure_real,
       }
+      if (defined(Class['::epel'])) {
+        Package['collectd-python'] {
+          require => Class['::epel'],
+        }
+      }
     }
   }
 

manifests/plugin/rabbitmq.pp

@@ -61,6 +61,10 @@
 ) {
   include collectd
 
+  if $facts['os']['family'] == 'RedHat' and versioncmp($facts['os']['release']['major'],'8') >= 0 {
+    fail('https://pypi.org/project/collectd-rabbitmq/ does not support Python 3')
+  }
+
   case $facts['os']['family'] {
     'RedHat': {
       $_custom_types_db = '/usr/share/collectd-rabbitmq/types.db.custom'

metadata.json

@@ -3,19 +3,22 @@
     {
       "operatingsystem": "RedHat",
       "operatingsystemrelease": [
-        "7"
+        "7",
+        "8"
       ]
     },
     {
       "operatingsystem": "CentOS",
       "operatingsystemrelease": [
-        "7"
+        "7",
+        "8"
       ]
     },
     {
       "operatingsystem": "OracleLinux",
       "operatingsystemrelease": [
-        "7"
+        "7",
+        "8"
       ]
     },
     {

spec/acceptance/class_plugin_python_spec.rb

@@ -7,6 +7,8 @@
       pp = <<-EOS
       class{'collectd::plugin::python':
       }
+      # Enable one write plugin to make logs quieter
+      class { 'collectd::plugin::csv':}
       EOS
       # Run 3 times since the collectd_version
       # fact is impossible until collectd is
@@ -22,39 +24,48 @@
     end
   end
 
-  context 'trivial module' do
+  context 'trivial pip module connect-time' do
     it 'works idempotently with no errors' do
       pp = <<-EOS
-      if $facts['os']['family'] == 'Debian' {
+      if $facts['os']['family'] == 'Debian' or ( $facts['os']['family'] == 'RedHat' and $facts['os']['release']['major'] == '8' )  {
         # for collectdctl command
         package{'collectd-utils':
-	  ensure => present,
+       	  ensure => present,
         }
       }
-      package{'python-pip':
+      if $facts['os']['family'] == 'RedHat' and $facts['os']['release']['major'] == '8'  {
+        $_python_pip_package = 'python3-pip'
+        $_pip_provider = 'pip3'
+      } else {
+        $_python_pip_package = 'python-pip'
+        $_pip_provider = 'pip'
+      }
+      package{$_python_pip_package:
         ensure => present,
       }
       package{['collectd-connect-time']:
-	ensure   => 'present',
-        provider => 'pip',
-	require  => Package['python-pip'],
-	before   => Service['collectd'],
+	      ensure   => 'present',
+        provider => $_pip_provider,
+	      require  => Package[$_python_pip_package],
+	      before   => Service['collectd'],
       }
       class{'collectd::plugin::python':
-	logtraces   => true,
-	interactive => false,
+	      logtraces   => true,
+	      interactive => false,
         modules     => {
            'collectd_connect_time' => {
-	     config => [{'target' => 'google.de'}],
-	   },
-	},
+	            config => [{'target' => 'google.de'}],
+	          },
+	      },
       }
       class{'collectd::plugin::unixsock':
-        socketfile => '/var/run/collectd-sock',
+        socketfile  => '/var/run/collectd-sock',
+        socketgroup => 'root',
       }
       EOS
 
-      # Run it twice and test for idempotency
+      # Run it twice or thrice and test for idempotency
+      apply_manifest(pp, catch_failures: true)
       apply_manifest(pp, catch_failures: true)
       apply_manifest(pp, catch_changes: true)
       shell('sleep 10')
@@ -75,39 +86,57 @@
       if $facts['os']['family'] == 'Debian' {
         # for collectdctl command
         package{['collectd-utils','python-dbus']:
-	  ensure => present,
+	        ensure => present,
         }
       }
-      package{['git','python-pip']:
+      if $facts['os']['family'] == 'RedHat' and $facts['os']['release']['major'] == '8'  {
+        $_python_pip_package = 'python3-pip'
+        $_pip_provider = 'pip3'
+      } else {
+        $_python_pip_package = 'python-pip'
+        $_pip_provider = 'pip'
+      }
+
+      package{['git',$_python_pip_package]:
         ensure => present,
-	before => Package['collectd-systemd'],
+	      before => Package['collectd-systemd'],
+      }
+      # Dependency on dbus for collectd-systemd installed with pip.
+      # https://github.com/mbachry/collectd-systemd/issues/11
+      if $facts['os']['family'] == 'RedHat' and $facts['os']['release']['major'] == '8'  {
+        package{'python3-dbus':
+          ensure => present,
+        }
       }
+
       package{'collectd-systemd':
-	ensure   => 'present',
-        provider => 'pip',
-	source   => 'git+https://github.com/mbachry/collectd-systemd.git',
-	before   => Service['collectd'],
+	      ensure   => 'present',
+        provider => $_pip_provider,
+	      source   => 'git+https://github.com/mbachry/collectd-systemd.git',
+	      before   => Service['collectd'],
       }
       class{'collectd':
         typesdb => ['/usr/share/collectd/types.db'],
       }
       class{'collectd::plugin::python':
-	logtraces   => true,
-	interactive => false,
+	      logtraces   => true,
+	      interactive => false,
         modules     => {
            'instanceA' => {
-	     module => 'collectd_systemd',
-	     config => [{'Service' => 'collectd'}],
-	   },
+	             module => 'collectd_systemd',
+	             config => [{'Service' => 'collectd'}],
+	          },
            'instanceB' => {
 	     module => 'collectd_systemd',
 	     config => [{'Service' => 'sshd'}],
-	   },
-	},
+	     },
+	    },
       }
       class{'collectd::plugin::unixsock':
         socketfile => '/var/run/collectd-sock',
+        socketgroup => 'root',
       }
+      class { 'collectd::plugin::csv':}
       EOS
 
       # Run it twice and test for idempotency