DNS Switch configuration

Components

- On PDB01 cluster

• rlsdns@pdb01 - have tables with information of which IP each node points to
• csdns@pdb01 - user with read access to rlsdns@pdb01 to which CS group connects

- On PDB-backup machine

• dnsDBchange.pl - script to change a pointer in the database
• dnschange.pl - script to make a SOAP call to CS-group method that read our database
• auto-dns-switch - script that checks availability of application (using external scripts) and changes the DNS in case of failure (using a mapping included in the file).

Usage

• On pdb-backup machine by calling 'dnsDBchange.pl' script followed by 'dnschange.pl' script
• On web at: http://cern.ch/it-div-adc/phydb/internal/index.php?page=docs//2_RLS//CERN/DNS_switch.php

Installation

- On PDB01 cluster

• PERL modules: DBD::Oracle (installed by FIO), SOAP::Lite, OpenSSL, Net::SSLeay, Crypt::SSLeay. Install them locally and set $PERL5LIB to its directory.