New slurm read plugins (do not necessarily merge) #1198
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I just fixed my commit for x86_32 and rebased it on top on current master branch. |
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When slurmd is build with multiple slurmd per node support, the name of the subdirectory where the cgroups are created changes to include the hostname (cpuset/slurm_NODENAME instead of cpuset/slurm). This patch supports this by trying both and add an option to select a node name if the nodename is not the local hostname.
This is the default in Slurm starting with version >=16.05.
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Can probably close this since #3037 was merged. |
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Yes, thank you all involved here. I'm closing this, since #3037 was merged. |
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Slurm is a job scheduler and workload manager that is very popular among the HPC community.
This pull request proposes 2 new read plugins to get metrics out of Slurm:
slurmctldplugin which sends RPC toslurmctlddaemon to get the number of CPU and nodes allocated to jobs. It relies on thelibslurmlibrary. Please note this plugin requires theGlobals trueparameter since thelibslurmlibrary also load a 2nd row of plugins withdlopen(). This plugin is designed to run on Slurm job scheduler server of the supercomputer.slurmdplugin which browse Slurm job specifics (cpuset) cgroups to get the jiffies of the CPU allocated to jobs and do the sum of memory PSS of all PIDs of the job. This plugin requires theTaskPlugin=task/cgroupto be enable in Slurm configuration file. This plugin is desgined to run on all compute nodes of a supercomputer.My intent is not necessarily to merge these plugins in upstream collectd repository (unless you would be happy to do so), but I would be pleased to get code review from peers and people used to develop such collectd plugins :)
I've tried to follow the development guidelines and re-use existing functions as much as possible. As I am not an experienced C developer very familiar with portability considerations (only tested on Linux and amd64), I would be pleased to get feedback on this matter too!