start-jenkins.sh

#!/bin/shell
set -euo pipefail

HERE="$(pwd)"
RELEASE=${1:-"lts"}

usage() {
  cat <<EOF
Usage: $1 [lts | weekly]
EOF
  exit 1
}

case ${RELEASE} in
  "lts")
    SUFFIX="stable"
    JENKINS_OPTS="--httpPort=9191"
    DL="http://mirrors.jenkins.io/war-stable/latest/jenkins.war"
   ;;
  "weekly")
    SUFFIX="weekly"
    JENKINS_PARAMETERS="-Dhudson.model.Hudson.killAfterLoad=true
     -Djenkins.model.Jenkins.logStartupPerformance=true"
    JENKINS_OPTS="--http2Port=9193 --httpPort=9192"
    DL="http://mirrors.jenkins.io/war/latest/jenkins.war"
    # cp -frup ${HERE}/jenkins-stable ${HERE}/jenkins-weekly
    rsync -qa ${HERE}/jenkins-stable ${HERE}/jenkins-weekly --exclude workspace
   ;;
  *)
    usage $@
   ;;
esac

EXPLODED_PATH="/tmp/jenkins-${SUFFIX}"
JENKINS_HOME="${HERE}/jenkins-${SUFFIX}"
WAR="/tmp/jenkins-${SUFFIX}.war"

if [[ ! -f ${WAR} ]]; then
  echo "There is no Jenkins executable locally. Fixing this for you.."
  curl -qL ${DL} -o ${WAR}
  echo "DONE. BOOM. YOU'RE WELCOME!"
fi

### See https://wiki.jenkins.io/display/JENKINS/Starting+and+Accessing+Jenkins
JENKINS_OPTS="${JENKINS_OPTS}
 --webroot=${EXPLODED_PATH}/war
 --pluginroot=${EXPLODED_PATH}/plugins
 --ajp13Port=-1
"

### See https://wiki.jenkins.io/display/JENKINS/Features+controlled+by+system+properties
JENKINS_PARAMETERS="${JENKINS_PARAMETERS:-}
 -Dhudson.model.WorkspaceCleanupThread.recurrencePeriodHours=1
 -Dhudson.model.WorkspaceCleanupThread.retainForDays=5
 -Dhudson.security.ExtendedReadPermission=true
 -Dhudson.slaves.WorkspaceList=_
 -Dhudson.TreeView=true
 -Djenkins.CLI.disabled=true
 -Dhudson.model.Run.ArtifactList.listCutoff=4
 -Dhudson.model.Run.ArtifactList.treeCutoff=10
 -Dhudson.DNSMultiCast.disabled=true
 -Dhudson.udp=-1
"

JAVA_OPTS="-server
 -Xmx1g
 -Xms1g
 -XX:+AlwaysPreTouch
 -XX:+UseStringDeduplication
 -XX:+UnlockExperimentalVMOptions
 -XX:+HeapDumpOnOutOfMemoryError
 -XX:HeapDumpPath=${JENKINS_HOME}/heapdump/
 -XX:+UseConcMarkSweepGC
 -XX:+ExplicitGCInvokesConcurrentAndUnloadsClasses
 -XX:+CMSParallelRemarkEnabled
 -XX:+ParallelRefProcEnabled
 -XX:+CMSClassUnloadingEnabled
 -XX:+ScavengeBeforeFullGC
 -XX:+CMSScavengeBeforeRemark
 -XX:NewSize=512m
 -XX:MaxNewSize=512m
 -XX:NewRatio=2
"

JENKINS_HOME="${JENKINS_HOME}" java ${JAVA_OPTS} ${JENKINS_PARAMETERS} -jar ${WAR} ${JENKINS_OPTS}

 -Dhudson.DNSMultiCast.disabled=true

as per doc:

Has no effect since 2.220 as the feature has been removed. See SECURITY-1641