Jetty 9.4.12 Installation and Configuration

Jetty 9.4.12 Installation and Configuration

1 OS Configuration :

# TCP buffers sysctl -w net.core.rmem_max=16777216 sysctl -w net.core.wmem_max=16777216 sysctl -w net.ipv4.tcp_rmem= "4096 87380 16777216" sysctl -w net.ipv4.tcp_wmem= "4096 16384 16777216" #queue sizes sysctl -w net.core.somaxconn=4096 sysctl -w net.core.netdev_max_backlog=16384 sysctl -w net.ipv4.tcp_max_syn_backlog=8192 sysctl -w net.ipv4.tcp_syncookies=1 #Ports sysctl -w net.ipv4.ip_local_port_range= "1024 65535" sysctl -w net.ipv4.tcp_tw_recycle=1 #File Descriptors, edit /etc/security/limits.conf   theusername hard nofile 40000 theusername soft nofile 40000 #Congestion Control sysctl net.ipv4.tcp_available_congestion_control sysctl -w net.ipv4.tcp_congestion_control=cubic

2 Download Jetty Package:

  You need to download it and put it to the OS Image.

wget https: //repo1 .maven.org /maven2/org/eclipse/jetty/jetty-distribution/9 .4.12.v20180830 /jetty-distribution-9 .4.12.v20180830. tar .gz wget https: //repo1 .maven.org /maven2/org/eclipse/jetty/jetty-distribution/9 .4.12.v20180830 /jetty-distribution-9 .4.12.v20180830.zip.md5

3 Prerequsite

 JDK installed.

4 Create service account for Jetty

useradd  -m jetty echo  "umask 002"  >>  /home/jetty/ .bash_profile

5 Unzip the Jetty packet to /opt/jetty

6 Create necessary directories.

mkdir  -p  /opt/apps_backup                                 #for CICD pipeline backup previous war packages mkdir  -p  /opt/jetty/apps/work                             #Jetty used internally mkdir  -p  /opt/jetty/apps/union                            #for key files which applications use mkdir  -p  /app/appLogs/                                    #Applicatin logs mkdir  /var/run/jetty

7  Add Jetty to system service

chown  -R jetty:jetty  /opt/jetty/ ln  -s  /opt/jetty/bin/jetty .sh  /etc/init .d /jetty chkconfig --add jetty systemctl  enable  jetty

8 Configure Jetty

cd  /opt/jetty/apps java -jar  /opt/jetty/start .jar --add-to-start=http,deploy,jvm,threadpool,threadlimit,jmx,jsp,servlet,websocket,jstl,server,resources,ext,home-base-warning,console-capture chown  -R jetty:jetty  /opt/jetty/apps chown  -R jetty:jetty  /opt/jetty/ chown  -R jetty:jetty  /app/appLogs chown  -R jetty:jetty  /opt/apps_backup #modify the port you want in /opt/jetty/apps/start.init #Tune the JVM memory and add -server option, thread_pool setting in /opt/jetty/apps/start.ini   (uncomment --exec and -Xmx,-Xms  set proper size and the GC section) #1)usually set Xmx to 50%+ of Physical memory #2)Be caution when set threadpool:MaxThreads, don't set it too high (memory overflow) as the default thread stack size(-Xss) is 1024K after JDK 5. #Configure the number of threads according to the webapp. That is, how many threads it needs in order to achieve the best performance. Configure with mind to limiting memory usage maximum available. Typically >50 and <500. Modify the character setting  for  jetty open  the  file  /opt/jetty/etc/webdefault .xml change  "<encoding>ISO-8859-1</encoding>"  to  "<encoding>UTF-8</encoding>"

9 Add environment variables

vi  /etc/default/jetty  and put  in ################################ JETTY_HOME= /opt/jetty                              JETTY_BASE= /opt/jetty/apps                         JETTY_USER=jetty JETTY_RUN= /opt/jetty/apps ################################ vi  /etc/profile  and add ################################ JETTY_HOME= /opt/jetty                              JETTY_BASE= /opt/jetty/apps JAVA_HOME= /usr/lib/jvm/java-1 .8.0-openjdk-1.8.0.212.b04-0.el7_6.x86_64 APP_LOGS_PATH= /app/appLogs/ ################################ source  /etc/profile

10 add OS users for Jetty

useradd   appuser                       # this user can be added to bastion host, it has read only privileges to view the logs. useradd  -g jetty appowner              # this usre can be added to bastion host, it can control the jetty service by issuing service jetty start/stop/status useradd  -g jetty appdeploy             # this user is to deploy WAR packages for pipeline. echo  "umask 002"  >>  /home/appdeploy/ .bash_profile chmod  771  /opt/jetty/apps/union chmod  771  /opt/jetty/apps/logs chmod  771  /opt/jetty/apps/webapps chmod  771  /opt/apps_backup chmod  771  /opt/jetty/apps/work echo  "<your password>"  |  passwd  appuser --stdin &> /dev/null echo  "<your password>"  |  passwd  appowner --stdin &> /dev/null echo  "<your password>"  |  passwd  appdeploy --stdin &> /dev/null id  appuser id  appowner   echo  "appowner ALL=(root) NOPASSWD: /sbin/service jetty stop,/sbin/service jetty start, /sbin/service jetty status"  >>  /etc/sudoers echo  "appdeploy ALL=(root) NOPASSWD: /sbin/service jetty stop,/sbin/service jetty start, /sbin/service jetty status"  >>  /etc/sudoers

11 add jetty setup script on boot

#!/bin/bash set  -x JETTY_INI= /opt/jetty/apps/start .ini #get current physical memory setting mem_size=` free  -m |  grep  Mem |  awk  '{print $2}' ` #set jetty JVM xmx to 50% of mem jmem=$(($mem_size /2 )) jmem= "-Xmx" $jmem "m" #replace 166 sed  -i  "166c $jmem"  $JETTY_INI sed  -i  '165,172s/#//g'  $JETTY_INI sed  -i  '174,179s/#//g'  $JETTY_INI