Using jenkins we have to Deploy a war file on tomcat server

Jenkins --> compile --> unit testing ---> Package(.war file)

Using jenkins we have to take this .war file and deplpy it on a webserver

Webserver : tomcat

Step 1: Create server on which we have to install tomcat 8

Step 2: Create another server on which jenkins is installed

Step 3: We will create a free style job to deploy the package on a tomcat server

plugin : deploy on container

Step 4: we will create a pipeline job, in which we will write code to deploy on tomcats erver

plugin : ssh agent

Steps for deployment on a webserver:

> on a server you are goign to install webserver

> Start the tomcat service or start the webserver

> Copy .war file (package) into the webapps directory of tomcat

> restart tomcat -> so that application is deployed successfully

Access the web application

publicip:8080/packagename

https://github.com/Sonal0409/DevOpsClassCodes

Step 1: Create server on which we have to install tomcat 8

Pre-req: Install java8 on the server

Install tomcat

$ cd /opt

$ wget https://dlcdn.apache.org/tomcat/tomcat-8/v8.5.78/bin/apache-tomcat-8.5.78.tar.gz

$ tar -xvzf apache-tomcat-8.5.78.tar.gz

$ mv apache-tomcat-8.5.78.tar.gz tomcat

$ cd tomcat

$ cd bin

$ ./startup.sh ==> tomcat will be up and running

go to browser

public ip:8080 ==> you will see tomcat

Do the desired config changes in context.xml file for access manager APP

Apply the changes in these 2 context.xml file of tomcat

vim /opt/tomcat/webapps/host-manager/META-INF/context.xml

vim /opt/tomcat/webapps/manager/META-INF/context.xml

comment this line in the contxt.xml

<Valve className="org.apache.catalina.valves.RemoteAddrValve"

allow="127\.\d+\.\d+\.\d+|::1|0:0:0:0:0:0:0:1" />

commented in both the files

<!-- <Valve className="org.apache.catalina.valves.RemoteAddrValve"

allow="127\.\d+\.\d+\.\d+|::1|0:0:0:0:0:0:0:1" /> -->

Create roles & credentials

****

$ cd conf

$ vim tomcat-users.xml

at the end before </tomcat-users> add these roles

<role rolename="manager-gui"/>

<role rolename="manager-script"/>

<role rolename="manager-jmx"/>

<role rolename="manager-status"/>

<user username="admin" password="admin" roles="manager-gui, manager-script, manager-jmx, manager-status"/>

<user username="deployer" password="deployer" roles="manager-script"/>

<user username="tomcat" password="s3cret" roles="manager-gui"/>

Save the file

$ cd bin

$ ./shutdown.sh

$ ./startup.sh

publicip:8080

click on managerapp

username: tomcat

password:s3cret

you can now see the manager app

Step 2: Create another server on which jenkins is installed - complete

Start jenkins

publicip:8080

Install a plugin : Deploy to container Plugin

Create a free style job

give the repo name

give the trigger

build step --> invoike top level maven target

goal as : clean install package

Post build actions

select deploy war/ear on container

WAR/EAR files : **/*.war

Containers:

click on add container--> select tomcat 8

Select credentials

and give tomcat URL

Build the job

Deployment complete

****************************************

Pipeline as code:

Give permissions to ec2-user to make chnages to webapps directory

chown -R ec2-user:ec2-user /opt

Download a plugin that will connect to tomcat server form jenkins

plugin: ssh agent

Using ssh copy the war file in the tomcat webapps directory

sh 'scp /var/lib/jenkins/workspace/TomcatDeploypipeline/target/addressbook.war ec2-user@3.129.17.201:/opt/tomcat/webapps'

command: scp filenamelocation username@publicip:Destinationpath

to do this step

we need a plugin

ssh agent

it connects to you tomcat server through jenkins using ssh

username : ec2-user

pem file

copy the war file in the tomcat webapps directory

Pipeline Code:

pipeline{

agent any

tools{

jdk 'myJAVA'

maven 'mymvn'

}

stages{

stage('cloneRepo'){

steps{

git 'https://github.com/Sonal0409/DevOpsClassCodes.git'

}

}

stage('package')

{

steps{

sh 'mvn clean install package'

}

}

stage('Deploy on tomcat'){

steps{

sshagent(['idnew']) {

sh 'scp -o StrictHostKeyChecking=no /var/lib/jenkins/workspace/TomcatDeploypipeline/target/addressbook.war ec2-user@3.129.17.201:/opt/tomcat/webapps'

}

}

}

}

}