Upgrading walmgr.py is easy since really this is just a python script. The most complicated part of the upgrade process will be keeping your database cluster up. Follow the below steps and you should avoid any downtime.

1. Download Latest SkyTools: Visit PgFoundry to download the latest SkyTools. Issue the below command from /usr/local/src on each server.

   wget http://pgfoundry.org/frs/download.php/2129/skytools-2.1.9.tar.gz
   

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I ran into a silly error tonight during some configuration changes for PostgreSQL that took me awhile to figure out so I wanted to share so it might save others some time in the future. In an attempt to boot the slave server in a PostgreSQL SkyTools walmgr configuration I was unable to get it operational. The server would seem like it was stopping recovery mode however I was unable to login and the recovery process was still showing. Eventually I used the verbose switch to see if I could gain more information about why it was not booting up and the output is below.

Command:
walmgr.py conf/wal-slave.ini boot -v

Error:
2009-04-22 01:24:22,949 3899 INFO Stopping recovery mode
2009-04-22 01:24:22,949 3899 DEBUG Using pg_auth file from master.
2009-04-22 01:24:22,950 3899 DEBUG Execute cmd: ‘cp’ ‘/var/lib/pgsql/walshipping/logs.complete/pg_auth’ ‘/var/lib/pgsql/data/global/pg_auth’
2009-04-22 01:24:22,955 3899 DEBUG Only single loop requested, exiting

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You might receive the below error in your postgresql.log file after issuing the walmgr.py syncdaemon command as explained below.

Error:  CDTFATAL:  role “root” does not exist

Command Issued:

walmgr.py conf/wal-master.ini syncdaemon -d

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