View on GitHub

Administration Guide

looking after a Kive server

Administration Guide

This page should help you look after Kive, Slurm, and PostgreSQL. If you don’t find your answers here, consider adding some notes and a link to the documentation you found somewhere else.

Installing a new server

This is closely related to the tasks for deploying a release in the file, but there are extra tasks that only need to be done once. We try to keep the vagrant scripts up to date, so you can experiment with a working installation. This is a high level description of the tasks that are detailed in those scripts.

Restarting a compute node

Sometimes, we have to restart compute nodes. The most common cause is a memory leak. We can see the memory available with this command:

$ bpsh -sap free -h
  0:               total        used        free      shared  buff/cache   available
  0: Mem:            94G         61G         16G        133M         17G         32G
  0: Swap:            0B          0B          0B
  1:               total        used        free      shared  buff/cache   available
  1: Mem:            62G         57G        283M        120M        5.1G        4.7G
  1: Swap:            0B          0B          0B

You can see in the example that node 1 is low on memory, so we’re going to drain the Slurm jobs off it and reboot it. You should replace n1 with the node name you want to drain.

sudo `which scontrol` update nodename=n1 state=drain reason="low memory"

Wait until the status changes from draining to drain.

$ sinfo -N
n0             1     kive-slow alloc 
n0             1 kive-clinical alloc 
n0             1   kive-medium alloc 
n1             1     kive-slow drain 
n1             1 kive-clinical drain 
n1             1   kive-medium drain 

Reboot the compute node, replacing 1 with the node number you just drained.

sudo `which bpctl` -S 1 --reboot

Watch for it to finish rebooting. Don’t panic when it goes into an error state for a few seconds.

beostatus -c

Put the node back into the Slurm pool.

sudo `which scontrol` update nodename=n1 state=resume

If there are jobs running in Kive, check that some of them get allocated to the node.

watch squeue -wn1