Thanks, Jonathan, I've been thinking about how to manage this as well and like it more than version-locking the kernel.
On Wed, Jun 09, 2021 at 09:28:07PM +0100, Jonathan Buzzard wrote: > > So you need to apply a kernel update and that means a new gpfs.gplbin :-( So > after going around the houses with several different approaches on this I > have finally settled on what IMHO is a most elegant method of ensuring the > right gpfs.gplbin version is installed for the kernel that is running and > thought I would share it. > > This is assuming you don't like the look of the compile it option IBM > introduced. You may well not want compilers installed on nodes for example, > or you just think compiling the module on hundreds of nodes is suboptimal. > > This exact version works for RHEL and it's derivatives. Modify for your > preferred distribution. It also assumes you have a repository setup with the > relevant gpfs.gplbin package. > > The basics are to use the "ExecStartPre" option of a unit file in systemd. > So because you don't want to be modifying the unit file provided by IBM > something like the following > > mkdir -p /etc/systemd/system/gpfs.service.d > echo -e "[Service]\nExecStartPre=-/usr/bin/yum --assumeyes install > gpfs.gplbin-%v" >/etc/systemd/system/gpfs.service.d/install-module.conf > systemctl daemon-reload > > How it works is that the %v is a special systemd variable which is the same > as "uname -r". So before it attempts to start gpfs, it attempts to install > the gpfs.gplbin RPM for the kernel you are running on. If already installed > this is harmless and if it's not installed it gets installed. > > How you set that up on your system is up to you, xCAT postscript, RPM > package, or a configuration management solution all work. I have gone for a > very minimal RPM I call gpfs.helper > > We then abuse the queuing system on the HPC cluster to schedule a "admin" > priority job that runs as soon as the node becomes free, which does a yum > update and then restarts the node. > > > JAB. > > -- > Jonathan A. Buzzard Tel: +44141-5483420 > HPC System Administrator, ARCHIE-WeSt. > University of Strathclyde, John Anderson Building, Glasgow. G4 0NG > _______________________________________________ > gpfsug-discuss mailing list > gpfsug-discuss at spectrumscale.org > http://gpfsug.org/mailman/listinfo/gpfsug-discuss -- -- Skylar Thompson (skyl...@u.washington.edu) -- Genome Sciences Department (UW Medicine), System Administrator -- Foege Building S046, (206)-685-7354 -- Pronouns: He/Him/His _______________________________________________ gpfsug-discuss mailing list gpfsug-discuss at spectrumscale.org http://gpfsug.org/mailman/listinfo/gpfsug-discuss