Jenkins 2017.txt

do all these as root user 
jenkins  on windows or linux (http://www.linuxfunda.com/2014/07/06/how-to-install-and-configure-jenkins-on-centos-6-4-part-iii/)

yum & rpm
----------

yum remove java
yum install jdk
#do it later
wget -O /etc/yum.repos.d/jenkins.repo http://pkg.jenkins-ci.org/redhat/jenkins.repo
rpm --import https://jenkins-ci.org/redhat/jenkins-ci.org.key



Create users on masters and nodes 
groupadd -g 501 jenkins 
useradd -u 501  -g 501 jenkins

--------------------------------
install via yum or rpm

add jenkins repo to cenos
Now we will add Jenkins Repository to our machine.


/etc/yum.repos.d/jenkins.repo
wget -O /etc/yum.repos.d/jenkins.repo http://pkg.jenkins-ci.org/redhat/jenkins.repo
rpm --import http://pkg.jenkins-ci.org/redhat/jenkins-ci.org.key

download 
	wget http://pkg.jenkins-ci.org/redhat/jenkins-1.643-1.1.noarch.rpm

install 
rpm -Uvh jenkins-1.643-1.1.noarch.rpm or yum install jenkins
updatedb

remove
rpm -e jenkins

auto start jenkins 
chkconfig --list | grep je
chkconfig jenkins on





--------------------------------
install manually ( best approach for full control) 

 
wget http://mirrors.jenkins-ci.org/war/latest/jenkins.war

5) touch /usr/local/jenkins/start-jenkins.sh
copy this 

#!/bin/bash
 
# import sysconfig settings and set defaults
[ -f /etc/sysconfig/jenkins ] && . /etc/sysconfig/jenkins
[ "${JENKINS_HOME}" == "" ] &&
    JENKINS_HOME=/usr/local/jenkins
[ "${JENKINS_LOG}" == "" ] &&
    JENKINS_LOG=/home/jenkins/jenkins.log
[ "${JENKINS_JAVA}" == "" ] &&
    JENKINS_JAVA=/usr/bin/java
[ "${JENKINS_JAVAOPTS}" == "" ] &&
    JENKINS_JAVAOPTS=""
[ "${JENKINS_IP}" == "" ] &&
    JENKINS_IP=0.0.0.0
[ "${JENKINS_PORT}" == "" ] &&
    JENKINS_PORT=8080
[ "${JENKINS_ARGS}" == "" ] &&
    JENKINS_ARGS=""
 
JENKINS_WAR=${JENKINS_HOME}/jenkins.war
 
# check for config errors
JENKINS_ERRORS=()
[ ! -f ${JENKINS_WAR} ] &&
    JENKINS_ERRORS[${#JENKINS_ERRORS[*]}]="JENKINS_HOME : The jenkins.war could not be found at ${JENKINS_HOME}/jenkins.war"
[ ! -f $JENKINS_JAVA ] &&
    JENKINS_ERRORS[${#JENKINS_ERRORS[*]}]="JENKINS_JAVA : The java executable could not be found at $JENKINS_JAVA"
 
# display errors if there are any, otherwise start the process
if [ ${#JENKINS_ERRORS[*]} != '0' ]
then
    echo "CONFIGURATION ERROR:"
    echo "    The following errors occurred when starting Jenkins."
    echo "    Please set the appropriate values at /etc/sysconfig/jenkins"
    echo ""
    for (( i=0; i<${#JENKINS_ERRORS[*]}; i++ ))
    do
        echo "${JENKINS_ERRORS[${i}]}"
    done
    echo ""
    exit 1
else
    echo "starting service"
    echo "nohup nice $JENKINS_JAVA $JENKINS_JAVAOPTS -jar $JENKINS_WAR --httpListenAddress=$JENKINS_IP --httpPort=$JENKINS_PORT $> $JENKINS_LOG 2>&1 &"
    nohup nice $JENKINS_JAVA $JENKINS_JAVAOPTS -jar $JENKINS_WAR --httpListenAddress=$JENKINS_IP --httpPort=$JENKINS_PORT $> $JENKINS_LOG 2>&1 &
fi

6) touch /usr/local/jenkins/stop-jenkins.sh
copy this 

#!/bin/bash
kill `ps -ef | grep [j]enkins.war | awk '{ print $2 }'`

7) touch /etc/init.d/jenkins
#! /bin/bash
# chkconfig: 2345 90 10
# description: Jenkins Continuous Integration server
# processname: /usr/local/jenkins/jenkins.war
 
# Source function library.
. /etc/rc.d/init.d/functions
 
# Get network sysconfig.
. /etc/sysconfig/network
 
# Check that networking is up, otherwise we can't start
[ "${NETWORKING}" = "no" ] && exit 0
 
# Get the Jenkins sysconfig
[ -f /etc/sysconfig/jenkins ] && . /etc/sysconfig/jenkins
[ "${JENKINS_HOME}" = "" ] &&
    JENKINS_HOME=/usr/local/jenkins
[ "${JENKINS_USER}" == "" ] &&
    JENKINS_USER=jenkins
 
startup=${JENKINS_HOME}/start-jenkins.sh
shutdown=${JENKINS_HOME}/stop-jenkins.sh
export JAVA_HOME=/usr/local/java/
 
start(){
    echo -n $"Starting Jenkins service: "
    pid=`ps -ef | grep [j]enkins.war | wc -l`
    if [ $pid -gt 0 ]; then
        echo "Jenkins is already running"
        exit 1
    fi
    su - $JENKINS_USER -c $startup
    RETVAL=$?
    [ $RETVAL == 0 ] &&
        echo "Jenkins was started successfully." ||
        echo "There was an error starting Jenkins."
}
 
stop(){
    action $"Stopping Jenkins service: "
    pid=`ps -ef | grep [j]enkins.war | wc -l`
    if [ ! $pid -gt 0 ]; then
        echo "Jenkins is not running"
        exit 1
    fi
    su - $JENKINS_USER -c $shutdown
    RETVAL=$?
    [ $RETVAL == 0 ] &&
        echo "Jenkins was stopped successfully." ||
        echo "There was an error stopping Jenkins."
}
 
status(){
    pid=`ps -ef | grep [j]enkins.war | wc -l`
    if [ $pid -gt 0 ]; then
        echo "Jenkins is running..."
    else
        echo "Jenkins is stopped..."
    fi
}
 
restart(){
    stop
    sleep 5
    start
}
 
# Call functions as determined by args.
case "$1" in
start)
    start;;
stop)
    stop;;
status)
    status;;
restart)
    restart;;
*)
    echo $"Usage: $0 {start|stop|status|restart}"
    exit 1
esac
 
exit 0




8) 
chown -R jenkins. /usr/local/jenkins
chmod a+x /usr/local/jenkins/start-jenkins.sh
chmod a+x /usr/local/jenkins/stop-jenkins.sh
chmod a+x /etc/init.d/jenkins


9) dont use now 
service jenkins status
service jenkins start
service jenkins restart
service jenkins stop
chkconfig jenkins on

11) which java
/usr/bin/java

10)vi /etc/sysconfig/jenkins
# Jenkins system configuration
JENKINS_HOME=/usr/local/jenkins
JENKINS_USER=jenkins
JENKINS_LOG=/home/jenkins/jenkins.log
JENKINS_JAVA=/usr/bin/java
JENKINS_JAVAOPTS=""
JENKINS_IP=0.0.0.0
JENKINS_PORT=8080
JENKINS_ARGS=""

12 if u need vitual host in apache 
<VirtualHost *:80>
        ServerName jenkins.doublesharp.com
        DocumentRoot    /var/www/html
 
        ProxyPass / http://localhost:8080/ nocanon
        ProxyPassReverse / http://localhost:8080/
        ProxyRequests Off
        ProxyPreserveHost On
        <Proxy http://localhost:8080/*>
                Order deny,allow
                Allow from all
        </Proxy>
        # If using reverse proxy from SSL
        #Header edit Location ^http: https:
</VirtualHost>


13
service jenkins stop or /etc/init.d/jenkins stop 
service jenkins start or /etc/init.d/jenkins start


Jenikins config file  will capture configuration parameters for the launch.
vi /etc/sysconfig/jenkins

defeult port 
netstat -tnlp | grep 8080
By default, Jenkins listen on port 8080
open browser and login to http://localhost:8080/

logs
tail -f /var/log/jenkins/jenkins.log



14 
jenkins  on windows or linux (http://www.linuxfunda.com/2014/07/06/how-to-install-and-configure-jenkins-on-centos-6-4-part-iii/)
---------


to change shell
chsh --list-shells
chsh -s /bin/bash jenkins

 
Working with jenkins 

1) Click on Manage Jenkins > Configure Global Security > 
Enable security 
Jenkins Own User Database > Allow Users to Signup > Save

This below two  step is needed if we use the unix groups as the database
chmod g+r /etc/shadow  . 
 
2) Click on Signup button (Top right corner of the dashboard) > Fill all the required information > click on SignUp

3) Now we will restrict User Signup and add “Matrix based security authentication”. Please follow the below steps:
	
Click on Manage Jenkins > Configure Global Security > Jenkins Own User Database > Unchek “Allow Users to Signup” > Matrix-based security > 
	Put the user Name @ “User/group to add:” text box > 
	click on add > 
	Check all the Check boxes > 
	Save
4) Manage Jenkins > Manage Users > Create Users in order to create more user in future

4.1) Click on “Manage Jenkins” > Click on “Configure System” 
update the jdk home /usr/java/jdk1.7.0_67
update the git path , including the git command in the whole path  /usr/local/git/bin/git
update the maven path 
	update Global MAVEN_OPTS with -Xms512m -XX:MaxPermSize=128m

5) How to add credentials. 

setup a ssh credentils for user jenkins 
log in to your Jenkins account. Click on the credential tab  .
Now Click on “Add domain” localhost or hostname
Provide a user friendly name and some description to it and press “OK”


create credinatila for right users ( here sample as jenkins )
---------------
su jenkins
cd ~
mkdir ~/.ssh
cd ~/.ssh
touch authorized_keys

touch  known_hosts
chmod 700 ~/.ssh && chmod 600 ~/.ssh/*

On the master jenkins machine do this for the jenkins user

ssh-keygen -t rsa -P ""

cat ~/.ssh/id_rsa.pub>>~/.ssh/authorized_keys

cat ~/.ssh/id_rsa.pub>>~/.ssh/authorized_keys

copy id_rsa.pub in to other slaves node machines  /.ssh/authorized_keys file on that machine

After completing the Credential entry in the jenknins now we will add the Node

or choose the master .ssh option 

6) Add a new Node
Go to the main dashboard of Jenkins Click on “Manage Jenkins” > Click on “Manage Nodes” from the List.
To add a new node click on “New Node” ,chhose dump slave 
include path  provide a folder /var/www/html for example.
assosiate the ssh creadential we created above 

Click on the advance and modify your port number if you are using any different port for your SSH. enter the ssh provate key 
update the advanced property with java home 
in the node configuration JavaPath has to  be set to /opt/software/jdk1.7.0_45/bin/java . give correct version
now launch slave agent 


7) add plugin 
Add the necessary plugin 
Manage Jenkins > Click on Manage Plugins > Click on update Tab > Chose the Git Plugin and download then and restart after install
add authorise plugin
add github
Maven Integration plugin
Junit plugin 
Subversion plugin 
ssh credential plugin 
Label Linked Jobs Plug


Manage Jenkins > Click on Manage Plugins > Click on Available Tab > Filter the Git Plugins > 
Chose the Git Plugin

Click on install without restart.


Create a job
1) first jobs name as mvnprojectgraph
2) choose maven project 
3) choose git repo http://github.com/cloudtiessolutions/mvnproject.git
4) add crediential  info@cloudties.in/info123$ ,choose global scope
5) Restrict where t run job and give label ( node name as label)


 Configure Global Security -> Access Control for Builds -> Configure Build Authorizations in Project Configuration -> Select Run as ...) 2/ In each upstream (or downstream - 
 
 
8) execute on the host where jenkits installed 
git ls-remote -h https://github.com/cloudtiessolutions/java.git HEA D

9) Create a new job Click on New Items > Give a Name to the Job > Choose “Build a free-style software project” option > Click on “Ok”
inside the project give the url like this 


10) check this option Restrict where this project can be run , also mentioned the host name in the label 
in source code management choose git and provide the following 
http://github.com/cloudtiessolutions/java.git

and provide username and password below in the same screen

reload job config
java -jar /home/jenkins/.jenkins/war/WEB-INF/jenkins-cli.jar  -s http://localhost:8080 reload-configuration


10)
vi /etc/ssh/ssh_config
ForwardX11 yes
restart sshd



jenkins jnlp