Fix method undefined in heredoc

site-cookbooks/kosmos_postgresql/recipes/replica.rb

@@ -16,16 +16,19 @@ if primary.nil?
   return
 end
 
+postgresql_service_name = "postgresql@#{postgresql_version}-main"
+postgresql_data_dir = "/var/lib/postgresql/#{postgresql_version}/main"
+
 # TODO Replace pg.kosmos.local with private IP once available
 # via proper node attribute
 # https://gitea.kosmos.org/kosmos/chef/issues/263
 execute "set up replication" do
   command <<-EOF
-systemctl stop #{postgresql_service}
+systemctl stop #{postgresql_service_name}
 mv #{postgresql_data_dir} #{postgresql_data_dir}.old
 pg_basebackup -h pg.kosmos.local -U replication -D #{postgresql_data_dir} -R
 chown -R postgres:postgres #{postgresql_data_dir}
-systemctl start #{postgresql_service}
+systemctl start #{postgresql_service_name}
   EOF
   environment 'PGPASSWORD' => postgresql_data_bag_item['replication_password']
   sensitive true