By Glynn Foster on Jul 16, 2012
One of the major new changes that was introduced in Oracle Solaris 11 is a new package management system, replacing the legacy SVR4 packaging that we've been using in Oracle Solaris for many years. Image Packaging System (IPS) modernizes the software lifecycle with an easy to use, network based packaging system built on the foundations of the Oracle Solaris ZFS filesystem. I've been working with the IPS engineering team to produce some content that will help administrators understand the basics of IPS and how best to take advantage of it updating systems in the data center.
An overview of IPS
In previous releases of the Oracle Solaris platform, administrators used SVR4 packaging to install software onto a system, and then they used a different set of commands to install patches to update the system. As Oracle Solaris evolved to include new technologies, such as Oracle Solaris zones, Oracle Solaris ZFS, and Solaris Service Management Facility (SMF), previously used processes for managing system updates and upgrades became more complex. With thousands of operating system instances installed in some of today's large virtualized data centers, manual methods of tracking and installing patches can result in errors that negatively affect application availability and security.
IPS is an integrated solution that helps automate and ease the complexity of managing system software on Oracle Solaris 11 by integrating patching with package updates. It relies on a network-centric and efficient approach with automatic software dependency checking and validation, and it builds on the foundation of ZFS as the default root file system. Using IPS, administrators can easily and reliably install or replicate an exact set of software package versions across many different client machines, and get a much clearer understanding of any differences between software versions installed on a system.
With ZFS's ability to snapshot and clone a given file system with little or no overhead, IPS establishes a much safer system update by applying changes to a clone or alternate boot environment so that updates can be done while a system is running services in a production environment. When a planned maintenance window can be scheduled, administrators can simply reboot the system into the new boot environment to get up and running faster with much lower system downtime. If administrators experience any problems with a new environment, they can simply bring the system down and back into the older boot environment.
Additionally, administration across any zones created on the system is much improved because the system automatically ensures that software package versions within a non-global zone are consistent with the global zone.
For the rest of the article, head on over to OTN and read Introducing the Basics of the Image Packaging System on Oracle Solaris 11.