Lion server unable to read settings and errors in logs.

Question

Having bought Lion Server from the app store yesterday and followed the simple install ... the web server is working ok in that the home page appears, but cannot get wiki server to work.
Am getting the message "error reading settings" in the right panel of the server app when i select wiki on the left.
When i look at the logs ... there are repeated errors relating to inability to access this file: "/var/pgsql/postgresql.conf":  
postgresql.conf": No such file or directory
Jun 21 05:59:06 macmini com.apple.launchd[1] (org.postgresql.postgres[18601]): Exited with code: 2
Jun 21 05:59:06 macmini com.apple.launchd[1] (org.postgresql.postgres): Throttling respawn: Will start in 10 seconds
Jun 21 05:59:16 macmini org.postgresql.postgres[18603]: postgres_real cannot access the server configuration file "/var/pgsql/postgresql.conf": No such file or directory
Jun 21 05:59:16 macmini com.apple.launchd[1] (org.postgresql.postgres[18603]): Exited with code: 2
Jun 21 05:59:16 macmini com.apple.launchd[1] (org.postgresql.postgres): Throttling respawn: Will start in 10 seconds
Jun 21 05:59:26 macmini org.postgresql.postgres[18606]: postgres_real cannot access the server configuration file "/var/pgsql/postgresql.conf": No such file or directory
Jun 21 05:59:26 macmini com.apple.launchd[1] (org.postgresql.postgres[18606]): Exited with code: 2
Jun 21 05:59:26 macmini com.apple.launchd[1] (org.postgresql.postgres): Throttling respawn: Will start in 10 seconds
Jun 21 05:59:36 macmini org.postgresql.postgres[18608]: postgres_real cannot access the server configuration file "/var/pgsql/postgresql.conf": No such file or directory
Jun 21 05:59:36 macmini com.apple.launchd[1] (org.postgresql.postgres[18608]): Exited with code: 2
Jun 21 05:59:36 macmini com.apple.launchd[1] (org.postgresql.postgres): Throttling respawn: Will start in 10 seconds
Any help would be much appreciated...

Answer 1

This helps me:
1st step was to initialize postgres with
sudo -u _postgres  /usr/bin/pg_ctl initdb -D /var/pgsql
this created all needed files and folder in /var/pgsql
2nd step after receiving an error that the PostgreSQL.log could not be written was to chmod the folder
sudo chown _postgres:_postgres /Library/Logs/PostgreSQL
3rd step was to initial all databases the server
cd /System/Library/ServerSetup/CommonExtras/PostgreSQLExtras
sudo -s
run all scripts found there:
CoreCollaborationPostgreSQLExtras.sh
SetupPodcastWikiPlugin.rb
WebmailServerSetup.sh
create_caldavd_db.sh
create_devicemgr_db.sh
I'm back and happy now