I mentioned some time ago that Churchill was looking pretty sick since no RHCSL 6.x distro with a version number greater than 6.6 seemed to deliver its software on a single DVD any more, and since multi-DVD installs break Churchill, Churchill was doomed.
But I was (happily) quite wrong on that point. It turns out that, in fact, CentOS is the only RHCSL distro that has chosen to package its distro in such a way that it breaks Churchill.
I’ve checked OEL 6.6, 6.7 and 6.8; and then I checked Scientific 6.6., 6.7 and 6.8; and I even checked genuine Red Hat 6.6, 6.7 and 6.8… and every single one of them works fine with Churchill.
So, as I mentioned last time, that now means Scientific Linux is the distro that Churchill will assume is in use if you use its ‘speed keys’ to build your Oracle server nodes. (Rather more bluntly, it means I’ve stopped using CentOS at all, for anything). You can still use OEL or Red Hat if you prefer, by spelling out your requirements on the boot strap line. But use a speed key to save some typing, and SL will be assumed.
And, of course, if you want to use CentOS 6.7 or 6.8 to build your Oracle servers using Churchill, forget it: because they just don’t work.
Why is the new default Scientific Linux and not, say, OEL? Simply because it’s (a) free to obtain without signing up for anything and (b) it’s not as butt-ugly as OEL when you boot it up (white text on a red background is neither pretty nor particularly legible).
Other than this issue of CentOS stopping working, the latest version of Churchill (we’re now up to version 1.6) introduces a rather more radical change of tack: no more support for Oracle 11g installations, of any sort, whatsoever. Of course, version 1.5 is still available which does still do 11g quite nicely -but 11g is so long in the tooth now, and completely out of support unless you happen to be using 18.104.22.168, for which an expensive paid support agreement is needed before it can even be downloaded, that it seemed a waste of time to keep 11g support in newer Churchill releases. So, 12c only it is.
Which of course means that Churchill’s hardware requirements have just gone through the roof to match Oracle’s own. A 2GB VM just doesn’t cut it any more. The new hardware minima are: 5GB RAM and a 40GB hard disk. So building a 2-node RAC and a 2-node Active Data Guard setup on your desktop now basically demands a 32GB desktop… and no laptops need apply.
All of which in turn means that I think it might be time to re-write the Churchill documentation (especially as it currently exists only as pages on the old version of this site): take the opportunity to spruce it up, refresh it, make it part of the native WordPress site and so on. Expect something soon-ish.