Yosemite Server - postgres not running

Question

Upgraded from Mountain Lion Server straight to Yosemite Server and Postgres stopped working.
sudo serveradmin settings list | grep post ---> returns nothing (i.e. not in list)
ps awx | grep postgres ---> returns the following:
=========================================
  192   ??  Ss     0:07.33 /usr/bin/python /Applications/Server.app/Contents/ServerRoot/usr/bin/xpostgres -a /Library/Server/ProfileManager/Config/PostgreSQL_config.plist
  218   ??  S      0:00.40 /Applications/Server.app/Contents/ServerRoot/usr/bin/postgres_real -D /Library/Server/ProfileManager/Config/ServiceData/Data/PostgreSQL -c unix_socket_directories=/Library/Server/ProfileManager/Config/var/PostgreSQL -c logging_collector=on -c log_rotation_size=10MB -c log_connections=on -c log_lock_waits=on -c log_statement=ddl -c log_line_prefix=%t -c listen_addresses= -c log_directory=/Library/Logs/ProfileManager -c log_filename=PostgreSQL-%F.log -c log_min_messages=WARNING -c log_min_error_statement=WARNING -c unix_socket_group=_devicemgr -c unix_socket_permissions=0770 -c max_connections=200
  230   ??  Ss     0:00.00 postgres: logger process                                  
  233   ??  Ss     0:00.05 postgres: checkpointer process                                  
  234   ??  Ss     0:00.23 postgres: writer process                                  
  235   ??  Ss     0:00.17 postgres: wal writer process                                  
  236   ??  Ss     0:00.64 postgres: autovacuum launcher process                                  
  237   ??  Ss     0:00.06 postgres: archiver process                                  
  238   ??  Ss     0:01.20 postgres: stats collector process                                  
  258   ??  Ss     0:00.24 postgres: wal sender process _devicemgr [local] streaming 0/7011D48                               
  384   ??  Ss     0:00.55 postgres: _devicemgr devicemgr_v2m0 [local] idle                               
  389   ??  Ss     0:00.00 postgres: _devicemgr devicemgr_v2m0 [local] idle                               
  390   ??  Ss     0:00.00 postgres: _devicemgr devicemgr_v2m0 [local] idle                               
1680   ??  S      0:03.25 /usr/bin/python /Applications/Server.app/Contents/ServerRoot/usr/bin/xpostgres -D /Library/Server/Wiki/Database.xpg/Cluster.pg -c log_line_prefix=%t -c log_lock_waits=on -c log_statement=ddl -c logging_collector=on -c max_connections=500 -c unix_socket_directories=/Library/Server/Wiki/PostgresSocket -c unix_socket_group=_teamsserver -c unix_socket_permissions=0770 -c log_connections=on -c listen_addresses= -c log_directory=/Library/Server/Wiki/Logs -c log_filename=postgres-%a.log -c log_rotation_age=1440 -c log_truncate_on_rotation=on
1684   ??  S      0:00.21 /Applications/Server.app/Contents/ServerRoot/usr/bin/postgres_real -D /Library/Server/Wiki/Database.xpg/Cluster.pg -c log_line_prefix=%t -c log_lock_waits=on -c log_statement=ddl -c logging_collector=on -c max_connections=500 -c unix_socket_directories=/Library/Server/Wiki/PostgresSocket -c unix_socket_group=_teamsserver -c unix_socket_permissions=0770 -c log_connections=on -c listen_addresses= -c log_directory=/Library/Server/Wiki/Logs -c log_filename=postgres-%a.log -c log_rotation_age=1440 -c log_truncate_on_rotation=on
1685   ??  Ss     0:00.02 postgres: logger process                                
1687   ??  Ss     0:00.08 postgres: checkpointer process                                
1688   ??  Ss     0:00.15 postgres: writer process                                
1689   ??  Ss     0:00.08 postgres: wal writer process                                
1690   ??  Ss     0:00.14 postgres: autovacuum launcher process                                
1691   ??  Ss     0:00.02 postgres: archiver process                                
1692   ??  Ss     0:00.31 postgres: stats collector process                                
1697   ??  Ss     0:00.13 postgres: wal sender process _teamsserver [local] streaming 0/A099278                             
1704   ??  Ss     0:00.01 postgres: collab collab [local] idle                             
3726 s000  S+     0:00.00 grep postgres
=========================================
Presumably it is running but not fully
psql ---> returns the following:
psql: could not connect to server: No such file or directory
  Is the server running locally and accepting
  connections on Unix domain socket "/var/pgsql_socket/.s.PGSQL.5432"?
Is it just a case of flicking a switch somewhere or is it broken?

Answer 1

Hi there;
The server is running under user "_devicemgr", and all you have to do is create a symbolic link to
/Library/Server/ProfileManager/Config/var/PostgreSQL in /private/var, as follows:
ln -s /Library/Server/ProfileManager/Config/var/PostgreSQL /private/var/pgsql_socket
Also let others have write/read/exec privileges to the files there:
chmod -R o+wrx /Library/Server/ProfileManager/Config/var/PostgreSQL
Now you can run psql
sudo -u _devicemgr psql -d postgres