Oracle 19c is has been getting a lot of traction recently, and I have been researching various aspects around its installation and use. One topic that came up recently was the installation of Oracle Restart 19c using ASM Filter Driver. ASM Filter Driver has been around for a little while, but I never really looked at it closely. I found very little has been written about ASMFD in the context of Oracle 19c either, so I thought I’d revert the trend and write a series of posts about it (maybe I just didn’t find the relevant articles, I didn’t look too closely)
This blog post and all those that follow in the series are by no means an endorsement for the technology! My only goal is to make the documentation more accessible, I found it a little hard to work out the steps and hope to save you some time. As with every new-ish storage technology it’s imperative to make sure (by means of rigorous testing) that it meets your requirements.
It’s not as simple as it seems
There are actually quite a few nuances to the installation process when trying to install ASM with ASMFD from the beginning, which I’ll detail in the short blog post series to follow. The idea is to install Oracle Restart 19c with ASMFD straight away, no upgrade from ASMLib, no changing from UDEV to ASMFD. Plus it’s a fresh installation, no upgrade from a previous release.
As always I’m using Oracle Linux as the basis for my tests. And since I’m a good citizen I have updated my KVM VMs to the latest and greatest at the time of writing. More details about the environment used can be found in each of the posts in the series.
How do I install ASMFD together with Oracle Restart 19c?
I have studied the documentation, and the way I see it there are essentially 2 ways of installing Oracle Restart 19c with ASMFD:
- Using UDEV to change permissions on all future ASM disks
- Labeling future ASM disks using asmcmd to achieve the same goal
According to the certification matrix (MOS 1369107.1), it also matters which Oracle Linux 7/kernel combination you are using.
The easiest thing to do should be switching the Oracle Linux from UEK to the Red Hat Compatible Kernel, and I’m going to write about that first. The simplicity gained by using RHCK is slightly offset by operational caveats such as kernel upgrades etc. But this is a post about Oracle Restart, not the intricacies of switching from UEK to RHCK …
For quite a while now, UEK 5 has been the default kernel for Oracle Linux 7. If you’d like to install Oracle Restart 19c/ASMFD on UEK 5 you can’t do that out of the box, a little magic is necessary.
The following is a list of things I hope to write in the upcoming days. It’s all about a silent installation of Oracle Restart 19c for use with ASMFD: