(PE-39215) Retreiving replica postgres from get_peadm_config - add_replica

No longer requiring user to input replica postgres host and instead getting this from peadm config

Author: Neil Anderson

REFERENCE.md

@@ -1788,7 +1788,6 @@ The following parameters are available in the `peadm::add_replica` plan:
 
 * [`primary_host`](#-peadm--add_replica--primary_host)
 * [`replica_host`](#-peadm--add_replica--replica_host)
-* [`replica_postgresql_host`](#-peadm--add_replica--replica_postgresql_host)
 * [`token_file`](#-peadm--add_replica--token_file)
 
 ##### <a name="-peadm--add_replica--primary_host"></a>`primary_host`
@@ -1803,15 +1802,6 @@ Data type: `Peadm::SingleTargetSpec`
 
 - The hostname and certname of the replica VM
 
-##### <a name="-peadm--add_replica--replica_postgresql_host"></a>`replica_postgresql_host`
-
-Data type: `Optional[Peadm::SingleTargetSpec]`
-
-- The hostname and certname of the host with the replica PE-PosgreSQL database.
-Can be a separate host in an XL architecture, or undef in Standard or Large.
-
-Default value: `undef`
-
 ##### <a name="-peadm--add_replica--token_file"></a>`token_file`
 
 Data type: `Optional[String]`

documentation/add_replica.md

@@ -64,12 +64,6 @@ The plan performs the following steps:
 - **Description:**  
   The hostname and certname of the replica VM.
 
-### `primary_postgresql_host`
-
-- **Type:** `Optional[Peadm::SingleTargetSpec]`
-- **Description:**  
-  The target specification for the primary PostgreSQL host that the new replica will synchronize with. This is the database server from which the replica will replicate data.
-
 ### `token_file`
 
 - **Type:** `Optional[String]`

documentation/automated_recovery.md

@@ -14,7 +14,6 @@ Manual procedures are documented in [recovery.md](recovery.md)
 This procedure uses the following placeholder references.
 
 * _\<primary-server-fqdn\>_ - The FQDN and certname of the primary Puppet server
-* _\<replica-postgres-server-fqdn\>_ - The FQDN and certname of the PE-PostgreSQL server which resides in the same availability group as the replacement replica Puppet server
 * _\<replacement-replica-fqdn\>_ - The FQDN and certname of the replacement replica Puppet server
 
 1. Run `peadm::add_replica` plan to deploy replacement replica Puppet server
@@ -24,7 +23,7 @@ This procedure uses the following placeholder references.
 
     2. For Extra Large deployments
 
-                bolt plan run peadm::add_replica primary_host=<primary-server-fqdn> replica_host=<replacement-replica-fqdn> replica_postgresql_host=<replica-postgres-server-fqdn>
+                bolt plan run peadm::add_replica primary_host=<primary-server-fqdn> replica_host=<replacement-replica-fqdn>
 
 ## Replace failed PE-PostgreSQL server (A or B side)
 

plans/add_replica.pp

@@ -4,38 +4,34 @@
 #   2: The existing replica is broken, we have a fresh new VM we want to provision the replica to.
 # @param primary_host - The hostname and certname of the primary Puppet server
 # @param replica_host - The hostname and certname of the replica VM
-# @param replica_postgresql_host - The hostname and certname of the host with the replica PE-PosgreSQL database.
-#   Can be a separate host in an XL architecture, or undef in Standard or Large.
 # @param token_file - (optional) the token file in a different location than the default.
 plan peadm::add_replica(
   # Standard or Large
   Peadm::SingleTargetSpec           $primary_host,
   Peadm::SingleTargetSpec           $replica_host,
 
-  # Extra Large
-  Optional[Peadm::SingleTargetSpec] $replica_postgresql_host = undef,
-
   # Common Configuration
   Optional[String] $token_file = undef,
 ) {
   $primary_target             = peadm::get_targets($primary_host, 1)
   $replica_target             = peadm::get_targets($replica_host, 1)
-  $replica_postgresql_target  = peadm::get_targets($replica_postgresql_host, 1)
 
   $code_manager_enabled = run_task('peadm::code_manager_enabled', $primary_target).first.value['code_manager_enabled']
 
   if $code_manager_enabled == false {
     fail('Code Manager must be enabled to add a replica. Please refer to the docs for more information on enabling Code Manager.')
   }
 
+  # Get current peadm config to ensure we forget active replicas
+  $peadm_config = run_task('peadm::get_peadm_config', $primary_target).first.value
+
+  $replica_postgresql_target = $peadm_config['params']['replica_postgresql_host']
+
   run_command('systemctl stop puppet.service', peadm::flatten_compact([
         $primary_target,
         $replica_postgresql_target,
   ]))
 
-  # Get current peadm config to ensure we forget active replicas
-  $peadm_config = run_task('peadm::get_peadm_config', $primary_target).first.value
-
   # Make list of all possible replicas, configured and provided
   $replicas = peadm::flatten_compact([
       $replica_host,
@@ -65,7 +61,7 @@
   # Wrap these things that operate on replica_postgresql_target in an if statement
   # to avoid failures retrieving PSQL version because you can't operate functions
   # on a return value of nil.
-  if $replica_postgresql_host {
+  if $replica_postgresql_target {
     # On the PE-PostgreSQL server in the <replacement-avail-group-letter> group
     $psql_version = run_task('peadm::get_psql_version', $replica_postgresql_target).first.value['version']
 

spec/acceptance/peadm_spec/plans/add_replica.pp

@@ -10,7 +10,6 @@
 
   $primary_host = $t.filter |$n| { $n.vars['role'] == 'primary' }
   $replica_host = $t.filter |$n| { $n.vars['role'] == 'spare-replica' }
-  $replica_postgresql_host = $t.filter |$n| { $n.vars['role'] == 'replica-pdb-postgresql' }
 
   if $replica_host == [] {
     fail_plan('"replica" role missing from inventory, cannot continue')
@@ -19,6 +18,5 @@
   run_plan('peadm::add_replica',
     primary_host            => $primary_host,
     replica_host            => $replica_host,
-    replica_postgresql_host => $replica_postgresql_host ? { [] => undef, default => $replica_postgresql_host },
   )
 }

spec/acceptance/peadm_spec/plans/perform_failover.pp

@@ -59,7 +59,6 @@
   out::message("Active nodes 2: ${res2.first['stdout']}")
 
   # add new replica
-  $replica_postgresql_host = $t.filter |$n| { $n.vars['role'] == 'primary-pdb-postgresql' }[0]
   $new_replica_host = $t.filter |$n| { $n.vars['role'] == 'spare-replica' }[0]
 
   if $new_replica_host == [] {
@@ -76,7 +75,6 @@
   run_plan('peadm::add_replica',
     primary_host            => $replica_host.uri,
     replica_host            => $new_replica_host.uri,
-    replica_postgresql_host => $replica_postgresql_host ? {[] => undef, default => $replica_postgresql_host.uri },
   )
 
   $res3 = run_command("/opt/puppetlabs/bin/puppet query \'${query}\'", $replica_host)