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Tom Clegg, 06/17/2016 03:12 PM
Crunch2 installation¶
(DRAFT -- when ready, this will move to doc.arvados.org→install)
- Table of contents
- Crunch2 installation
Set up a crunch-dispatch service¶
Currently, dispatching containers via SLURM is supported.
Install crunch-dispatch-slurm on a node that can submit SLURM jobs. This can be the slurm controller node, a worker node, or any other node that has the appropriate SLURM/munge configuration.
sudo apt-get install crunch-dispatch-slurm
Create a privileged token for use by the dispatcher. If you have multiple dispatch processes, you should give each one a different token.
apiserver:~$ cd /var/www/arvados-api/current
apiserver:/var/www/arvados-api/current$ sudo -u webserver-user RAILS_ENV=production bundle exec script/create_superuser_token.rb
zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz
Save the token on the dispatch node, in /etc/sv/crunch-dispatch-slurm/env/ARVADOS_API_TOKEN
Example runit script (/etc/sv/crunch-dispatch-slurm/run
):
#!/bin/sh
set -e
exec 2>&1
export ARVADOS_API_HOST=uuid_prefix.your.domain
exec chpst -e ./env -u crunch crunch-dispatch-slurm
Example runit logging script (/etc/sv/crunch-dispatch-slurm/log/run
):
#!/bin/sh
set -e
[ -d main ] || mkdir main
exec svlogd -tt ./main
Ensure the crunch
user exists -- and has the same UID, GID, and home directory -- on the dispatch node and all SLURM compute nodes. Ensure the crunch
user can run docker containers on SLURM compute nodes.
Install crunch-run on all compute nodes¶
sudo apt-get install crunch-run
Enable cgroup accounting on all compute nodes¶
(This requirement isn't new for crunch2/containers, but it seems to be a FAQ. The Docker install guide mentions it's optional and performance-degrading, so it's not too surprising if people skip it. Perhaps we should say why/when it's a good idea to enable it?)
Check https://docs.docker.com/engine/installation/linux/ for instructions specific to your distribution.
For example, on Ubuntu:- Update
/etc/default/grub
to include:GRUB_CMDLINE_LINUX="cgroup_enable=memory swapaccount=1"
sudo update-grub
- Reboot
Configure docker¶
Unchanged from current docs.
Test the dispatcher¶
On the dispatch node, monitor the crunch-dispatch logs.
dispatch-node$ tail -F /etc/sv/crunch-dispatch-slurm/log/main/current
On a shell VM, install a docker image for testing.
user@shellvm:~$ arv-keepdocker busybox
On a shell VM, run a trivial container.
user@shellvm:~$ arv container_request create --container-request '{
"name": "test",
"state": "Committed",
"priority": 1,
"container_image": "busybox",
"command": ["echo", "OK"]
}'
Updated by Tom Clegg about 8 years ago · 6 revisions