h1. Crunch setup
+The dispatcher normally runs on the same host/VM as the API server.
+
h4. Perl SDK dependencies
* @apt-get install libjson-perl libwww-perl libio-socket-ssl-perl libipc-system-simple-perl@
* @pip install --upgrade pyvcf@
+h4. Redis
+
+On controller:
+
+* @apt-get install redis-server@
+
+h4. Crunch user account
+
+On compute nodes and controller:
+
+* @adduser crunch@
+
+The crunch user should have the same UID, GID, and home directory on all compute nodes and on the controller.
+
h4. Repositories
Crunch scripts must be in git repositories in @/var/cache/git/*/.git@ (or whatever is configured in @services/api/config/environments/production.rb@).
Once you have imported some commits, you should be able to create a new job:
<pre>
-read -rd "\000" newjob <<EOF; arv job create --job "$newjob"
+read -rd $'\000' newjob <<EOF; arv job create --job "$newjob"
{"script_parameters":{"input":"f815ec01d5d2f11cb12874ab2ed50daa"},
"script_version":"master",
"script":"hash"}
set -e
export PATH="$PATH":/path/to/arvados/services/crunch
export PERLLIB=/path/to/arvados/sdk/perl/lib:/path/to/warehouse-apps/libwarehouse-perl/lib
-export ARVADOS_API_HOST=xyzzy.arvadosapi.com
+export ARVADOS_API_HOST={{ site.arvados_api_host }}
+export PYTHONPATH=/path/to/arvados/src/sdk/python
+export CRUNCH_DISPATCH_LOCKFILE=/var/lock/crunch-dispatch
+
+fuser -TERM -k $CRUNCH_DISPATCH_LOCKFILE || true
## Only if your SSL cert is unverifiable:
# export ARVADOS_API_HOST_INSECURE=yes