add peadm::add_replica plan

Author: timidri

plans/add_replica.pp

@@ -0,0 +1,76 @@
+# use case 1: the replica is gone, 
+# use case 2: there is no replica, 
+# both use cases: we have a fresh new VM we want to provision the replica to
+
+plan peadm::add_replica(
+  Peadm::SingleTargetSpec $primary_host,
+  Peadm::SingleTargetSpec $replica_host,
+  Peadm::SingleTargetSpec $replica_postgresql_host,
+){
+
+  $primary_target             = peadm::get_targets($primary_host, 1)
+  $replica_target             = peadm::get_targets($replica_host, 1)
+  $replica_postgresql_target  = peadm::get_targets($replica_postgresql_host, 1)
+
+  $certdata = run_task('peadm::cert_data', $primary_target).first.value
+  $primary_avail_group_letter = $certdata['extensions'][peadm::oid('peadm_availability_group')]
+  $replica_avail_group_letter = $primary_avail_group_letter ? { 'A' => 'B', default => 'A' }
+
+  # Stop puppet.service on replica postgresql host
+  run_command('systemctl stop puppet.service', $replica_postgresql_target)
+
+  # stop pe-postgresql.service on replica postgresql host
+  run_command('systemctl stop pe-postgresql.service', $replica_postgresql_target)
+
+  run_command("puppet infrastructure forget ${replica_target.peadm::certname()}", $primary_target)
+
+  run_task('peadm::agent_install', $replica_target,
+    server        => $primary_target.peadm::certname(),
+    install_flags => [
+      "extension_requests:${peadm::oid('peadm_role')}='puppet/server'",
+      "extension_requests:${peadm::oid('peadm_availability_group')}=${replica_avail_group_letter}",
+      "main:certname=${replica_target.peadm::certname()}",
+    ],
+  )
+
+  run_task('peadm::puppet_runonce', $replica_target)
+
+  # On the PE-PostgreSQL server in the <replacement-avail-group-letter> group
+
+  # Stop puppet.service
+  run_command('systemctl stop puppet.service', $replica_postgresql_target)
+
+  # Add the following two lines to /opt/puppetlabs/server/data/postgresql/11/data/pg_ident.conf
+
+  #  pe-puppetdb-pe-puppetdb-map <replacement-replica-fqdn> pe-puppetdb
+  #  pe-puppetdb-pe-puppetdb-migrator-map <replacement-replica-fqdn> pe-puppetdb-migrator
+  apply($replica_postgresql_target) {
+    file_line { 'pe-puppetdb-pe-puppetdb-map':
+      path => '/opt/puppetlabs/server/data/postgresql/11/data/pg_ident.conf',
+      line => "pe-puppetdb-pe-puppetdb-map ${replica_target.peadm::certname()} pe-puppetdb",
+    }
+    file_line { 'pe-puppetdb-pe-puppetdb-migrator-map':
+      path => '/opt/puppetlabs/server/data/postgresql/11/data/pg_ident.conf',
+      line => "pe-puppetdb-pe-puppetdb-migrator-map ${replica_target.peadm::certname()} pe-puppetdb-migrator",
+    }
+  }
+
+  # Restart pe-postgresql.service
+  run_command('systemctl restart pe-postgresql.service', $replica_postgresql_target)
+
+  # Provision the new system as a replica
+  run_task('peadm::provision_replica', $primary_target,
+    replica => $replica_target.peadm::certname(),
+    # token_file => $token_file,
+
+    # Race condition, where the provision command checks PuppetDB status and
+    # probably gets "starting", but fails out because that's not "running".
+    # Can remove flag when that issue is fixed.
+    legacy     => true,
+  )
+
+  # start puppet service on postgresql host
+  run_command('systemctl stop puppet.service', $replica_postgresql_target)
+
+
+}