kill-processes-orphaned-by-jenkins.sh

#! /bin/bash

# Kill processes orphaned by Jenkins

# Work around Java's use of SIGTERM rather than SIGKILL and
# Jenkins's lack of any workaroud in the box.
# here is the relevant bug:
# https://issues.jenkins-ci.org/browse/JENKINS-17116

# Suggested usage:
#
#     $ crontab -l
#     */5 0 0 0 0 /path/to/kill-processes-orphaned-by-jenkins.sh <jenkins_username> <jenkins auth> false 2>&1 | logger 

# Tested on Linux Ubuntu 11.04, 12.04
# NOTE: this must run as the jenkins user or root to see the environment variables (needed to list build urls)

#JENKINS_USERNAME=jenkins
#USER_AUTH=<username>:<password>
#DRYRUN=true

JENKINS_USERNAME=$1
USER_AUTH=$2
DRYRUN=$3
if [ "$DRYRUN" != "false" ]; then DRYRUN=true; fi

for url in $(ps e -U $JENKINS_USERNAME | grep -o "[B]UILD_URL=[^ ]*" | awk -F'=' '{print $2}' | sort -u)
do
    curl -s -u "$USER_AUTH" "$url"'/api/json?tree=building' | grep -q true
    building=$?
    false=1
    if [ $building -eq $false ]
    then
        for pid in $(ps e -U $JENKINS_USERNAME | grep "$url" | awk '{print $1}')
        do
            echo 'Finished job: '"$url"
            ps -f -p $pid
            echo
            if ! $DRYRUN; then
                echo "Killing process $pid orphaned by Jenkins:"
                kill -9 $pid
            else
                echo "dry run, don't kill $pid"
            fi
        done
    fi
done