On 28/04/2020 11:57, Ulrich Sibiller wrote:
Hi,
when the gpfs systemd service returns from startup the filesystems are
usually not mounted. So having another service depending on gpfs is not
feasible if you require the filesystem(s).
Therefore we have added a script to the systemd gpfs service that waits
for all local gpfs filesystems being mounted. We have added that script
via ExecStartPost:
Yuck, and double yuck. There are many things you can say about systemd
(and I have a choice few) but one of them is that it makes this sort of
hackery obsolete. At least that is one of it goals.
A systemd way to do it would be via one or more helper units. So lets
assume your GPFS file system is mounted on /gpfs, then create a file
called ismounted.txt on it and then create a unit called say
gpfs_mounted.target that looks like
# gpfs_mounted.target
[Unit]
TimeoutStartSec=infinity
ConditionPathExists=/gpfs/ismounted.txt
ExecStart=/usr/bin/sleep 10
RemainAfterExit=yes
Then the main unit gets
Wants=gpfs_mounted.target
After=gpfs_mounted.target
If you are using scripts in systemd you are almost certainly doing it
wrong :-)
JAB.
--
Jonathan A. Buzzard Tel: +44141-5483420
HPC System Administrator, ARCHIE-WeSt.
University of Strathclyde, John Anderson Building, Glasgow. G4 0NG
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