puppet: Add CentOS packages to postgres_common.pp.

puppet/zulip/manifests/postgres_common.pp

@@ -1,9 +1,11 @@
 class zulip::postgres_common {
   case $::osfamily {
     'debian': {
+      $nagios_plugins = 'nagios-plugins-basic'
+      $postgresql = "postgresql-${zulip::base::postgres_version}"
       $postgres_packages = [
         # The database itself
-        "postgresql-${zulip::base::postgres_version}",
+        $postgresql,
         # tools for database monitoring
         'ptop',
         # Needed just to support adding postgres user to 'zulip' group
@@ -20,38 +22,47 @@ class zulip::postgres_common {
       ]
     }
     'redhat': {
+      $nagios_plugins = 'nagios-plugins'
+      $postgresql = "postgresql${zulip::base::postgres_version}"
       $postgres_packages = [
-        # The database itself
-        "postgresql-${zulip::base::postgres_version}",
-        # tools for database monitoring
-        'ptop',
-        # Needed just to support adding postgres user to 'zulip' group
-        'ssl-cert',
-        # our dictionary
-        'hunspell-en-us',
-        # Postgres Nagios check plugin
-        'check-postgres',
+        $postgresql,
+        "${postgresql}-server",
+        "${postgresql}-devel",
+        'pg_top',
+        'ssl-cert',  #?? TODO no equivalent on CentOS 7
+        'hunspell-en-US',
+        # exists on CentOS 6 and Fedora 29 but not CentOS 7
+        # see https://pkgs.org/download/check_postgres
+        # alternatively, download directly from:
+        # https://bucardo.org/check_postgres/
+        # 'check-postgres',  # TODO
       ]
       exec {'pip2_deps':
         # Python modules used in our monitoring/worker threads
         command => '/usr/bin/pip2 install pytz python-dateutil'
       }
-
       exec {'pip3_deps':
         command => 'python3 -m pip install pytz python-dateutil'
       }
     }
+    default: {
+      fail('osfamily not supported')
+    }
   }
+
   zulip::safepackage { $postgres_packages: ensure => 'installed' }
 
-  exec { 'disable_logrotate':
-    # lint:ignore:140chars
-    command => '/usr/bin/dpkg-divert --rename --divert /etc/logrotate.d/postgresql-common.disabled --add /etc/logrotate.d/postgresql-common',
-    # lint:endignore
-    creates => '/etc/logrotate.d/postgresql-common.disabled',
+  if $::osfamily == 'debian' {
+    # The logrotate file only created in debian-based systems
+    exec { 'disable_logrotate':
+      # lint:ignore:140chars
+      command => '/usr/bin/dpkg-divert --rename --divert /etc/logrotate.d/postgresql-common.disabled --add /etc/logrotate.d/postgresql-common',
+      # lint:endignore
+      creates => '/etc/logrotate.d/postgresql-common.disabled',
+    }
   }
   file { '/usr/lib/nagios/plugins/zulip_postgres_common':
-    require => Package[nagios-plugins-basic],
+    require => Package[$nagios_plugins],
     recurse => true,
     purge   => true,
     owner   => 'root',
@@ -66,7 +77,7 @@ class zulip::postgres_common {
     group   => 'postgres',
     mode    => '0750',
     source  => 'puppet:///modules/zulip/postgresql/env-wal-e',
-    require => Package["postgresql-${zulip::base::postgres_version}"],
+    require => Package[$postgresql],
   }
 
   file { '/usr/local/bin/pg_backup_and_purge':
@@ -83,7 +94,7 @@ class zulip::postgres_common {
     groups     => ['ssl-cert'],
     membership => minimum,
     require    => [
-      Package["postgresql-${zulip::base::postgres_version}"],
+      Package[$postgresql],
       Package['ssl-cert']
     ],
   }