> -----Original Message----- > From: drbd-user-boun...@lists.linbit.com <drbd-user- > boun...@lists.linbit.com> On Behalf Of Roland Kammerer > Sent: Monday, April 25, 2022 1:40 AM > To: drbd-user@lists.linbit.com > Cc: Roland Kammerer <roland.kamme...@linbit.com> > Subject: Re: [DRBD-user] Do You Always Have to Upgrade/Rebuild DRBD > Whenever You Upgrade the Kernel? > > On Fri, Apr 22, 2022 at 09:05:46PM +0000, Eric Robinson wrote: > > Thanks for the feedback, Roland. I am actually a paying Linbit > > customer, but I am unaware of the process to follow when upgrading the > > OS. For example, I'm currently running Rocky Linux 8.5 (kernel > > 4.18.0-348.2.1.el8_5.x86_64) and drbd 9.19.1-1.el8. > > The name of the meta package (i.e., "drbd") is IMO pretty unfortunate, that > version refers to DRBD utils. It does not matter, can not remember when we > did a breaking change in utils. What matters is kmod-drbd. But you most > likely know that. >
Indeed. We've been using DRBD since 2006. We're not experts, but we've picked up a few of the basics. 😊 > > There is a kernel > > upgrade to 4.18.0-348.20.1.el8_5 available in the Rocky repo. If I > > install that, does it break drbd? > > In 99.9% it does not break the binary module. That would only be the case if > the vendor broke the kAbi. We usually have 1 binary module per RHEL dot > release. So as long as you don't jump from like RHEL 8.4 to 8.5 or something > then the same module should be fine. Also, you might enable a "dot > repository" (one that has .../rhel8.5/... in the URL, not the global > ".../rhel8/..." one that contains all the kernel modules for all RHEL (8.0, > 8.1, > 8.2,...) if you are a customer. If you enabled the "dot repo" you should be > fine taking the latest kernel + the latest kmod-drbd. If, and that is very > unlikely, there are more than 1 kmod-drbd in a dot repo, use the one closest > to your kernel version, usually the later one. Again, that usually is not the > case, only if the kAbi was broken. > > Finding the best matching kernel module to a given kernel for all DRBD > modules that exist is a problem we had to solve ourselves, we even have a > public web service one can use like this: > $ cat /etc/os-release | curl -T - -X POST drbd.io:3030/api/v1/best/$(uname -r) > -s > > At the time of writing it answered with: > kmod-drbd-9.1.7_4.18.0_348-1.x86_64.rpm > > If you are into RHEL versioning, you see that this is the first kernel-devel > package in that kernel series. So, for 4.18 there has not been any breakage. > Which again is the usual case, the people at Redhat know what they are > doing. Most of the time :). > > Code for that web service and the underlying python library can be found > here: > https://github.com/LINBIT/bestdrbdmodule > https://github.com/LINBIT/python-lbdist > > Regards, rck This is all excellent information, thanks much. > _______________________________________________ > Star us on GITHUB: https://github.com/LINBIT drbd-user mailing list drbd- > u...@lists.linbit.com https://lists.linbit.com/mailman/listinfo/drbd-user Disclaimer : This email and any files transmitted with it are confidential and intended solely for intended recipients. If you are not the named addressee you should not disseminate, distribute, copy or alter this email. Any views or opinions presented in this email are solely those of the author and might not represent those of Physician Select Management. Warning: Although Physician Select Management has taken reasonable precautions to ensure no viruses are present in this email, the company cannot accept responsibility for any loss or damage arising from the use of this email or attachments. _______________________________________________ Star us on GITHUB: https://github.com/LINBIT drbd-user mailing list drbd-user@lists.linbit.com https://lists.linbit.com/mailman/listinfo/drbd-user
