provide postgres .pid file

stack/lapp/buildout.cfg

@@ -85,7 +85,7 @@ mode = 0644
 recipe = slapos.recipe.template
 url = ${:_profile_base_location_}/postgres/instance-postgres.cfg.in
 output = ${buildout:directory}/instance-postgres.cfg
-md5sum = 03247dadc6b665ed3b876ddc8b1830bf
+md5sum = f647755490c35e8a4c85561c97893b19
 mode = 0644
 
 [instance-postgres-import]

stack/lapp/postgres/instance-postgres.cfg.in

@@ -206,7 +206,7 @@ symlink_base = ${postgresql:location}/bin
 
 [slapmonitor]
 recipe = slapos.cookbook:slapmonitor
-pid-file = $${basedirectory:run}/mariadb.pid
+pid-file = $${postgres-instance:pgdata-directory}/postmaster.pid
 database-path = $${basedirectory:log}/slapmonitor.db
 shell-path = ${dash:location}/bin/dash
 slapmonitor-path = ${buildout:bin-directory}/slapmonitor