I got an opportunity to run a trial migration of several applications from Solaris Coolstack version 1.2 to version 1.3.1 recently. The Coolstack applications that we use include MySQL, Apache (including mod_jk), Tomcat and Memcached.
I had no problems at all with the Tomcat or Memcached upgrades but did hit 2 minor issues with MySQL and Apache (mod_jk actually).
This involved going from MySQL 5.0.45 to 5.1.25 and whilst I found that a regular
mysqldump of my MySQL 5.0 databases imported without error into MySQL 5.1, I did encounter some minor issues with user permissions later on. Fortunately, the guide to Upgrading from MySQL 5.0 to 5.1 proved very useful and revealed that I had missed an essential step in the upgrade process which was the use of the
mysql_upgrade utility. There is lots more to read about in the upgrade guide and depending on your configuration, there may be more steps to be considered.
2. Apache (mod_jk)
Whilst the Apache upgrade (2.2.6 to 2.2.9) worked a treat, I found that mod_jk 1.2.26 employs stricter rules in relation to the placement of JkMount/JkMountFile commands in VirtualHosts. In my previous configuration, I had a single JkMount command inside my mod_jk.conf file (which in turn was included from the main httpd.conf file). However, using this configuration with Apache 2.2.9 and mod_jk 1.2.26, I found that my AJP load balancer was not working correctly for one of my VirtualHosts. It was only when I moved my JkMount command inside the scope of the VirtualHost that it started working again.
Most of the SMF service names in the Coolstack 1.3.1 applications have been renamed slightly. In Coolstack 1.2, all of the SMF service names began with
csk- but now they all end with
-csk instead. This was apparently done to make the service names more compatible with OpenSolaris but, to be honest, I find it a little bit annoying as we’ve written a number of useful scripts that manage these services explicitly by name.
Coolstack 1.3.1 includes two different versions of Tomcat (5.0 and 6.0) which install to different locations and have different SMF service names.