resque_worker.sh

#!/bin/bash

#
# Spawns a rescue worker configured according to local hostname.
# See the 'case'-block at the end of this file.
#

# make sure we have our environment
source ~/.bash_profile

# simfy hack; legible hostnames
# all hosts appear as s*.o2
HN=${HOSTNAME}
if [ -e /etc/real_hostname ]; then
    HN=`cat /etc/real_hostname`
    HN=${HN}.o2
fi 

function launch_worker {
    # spins up a worker 
    # Argument 1: RAILS_ENV
    # Argument 2: QUEUE_NAME
    # Argument 3: COUNT (Number of worker processes)
    export RAILS_ENV=$1
    export QUEUE=$2
    export COUNT=$3
    cd /opt/simfy/app/simfy_production/current
    export VERBOSE=1
    ( echo $! >${VAR}/state/resque_worker.pid; \
      exec nohup rake environment resque:work 2>&1 ) \
        | nohup logger -t "resque_worker" >/dev/null 2>&1 &
    mypid=`cat ${VAR}/state/resque_worker.pid`
    echo "worker spawned: q'${QUEUE}', env ${RAILS_ENV}, count $COUNT, pid ${mypid}"

}

case $HN in
    s4.o2)
        # NFS Server
        # Argument 1: RAILS_ENV
        # Argument 2: QUEUE_NAME
        # Argument 3: COUNT (Number of worker processes)
        launch_worker production nfs_server 4
        launch_worker production facebook_queue 2
    ;;
    s3.o2)
        # DB Server
        launch_worker production db_server 1
    ;;
    s5.o2)
        # Staging Server
        launch_worker staging db_server 1
        launch_worker staging nfs_server 1
        launch_worker staging facebook_queue 1
    ;;
    *)
        echo "No worker configured for this host."
    ;;
esac