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Update Jenkins_Tomcat
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‎Jenkins_Tomcat‎

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Using jenkins we have to Deploy a war file on tomcat server
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1: Install TOMCAT on linux box
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Step #1: Install Tomcat
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1.1 Create a Linux machine // Ubuntu 20.X
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Prereq: Install JAVA
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1.2: down load the package --> google doneload Apache Tomcat --> Version 8
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Copy the link address
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cd /opt
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wget https://dlcdn.apache.org/tomcat/tomcat-8/v8.5.81/bin/apache-tomcat-8.5.81.tar.gz
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tar xzvf apache-tomcat-8.5.81.tar.gz
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mv apache-tomcat-8.5.81 tomcat
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Jenkins --> compile --> unit testing ---> Package(.war file)
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cd tomcat
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cd bin/
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./startup.sh ---> Tomcat started.
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Using jenkins we have to take this .war file and deplpy it on a webserver
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Enabling remote access
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-------------------
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cd /opt/tomcat
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find / -name context.xml
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Webserver : tomcat
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/opt/tomcat/webapps/manager/META-INF/context.xml
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/opt/tomcat/webapps/host-manager/META-INF/context.xml
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Step 1: Create server on which we have to install tomcat 8
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Backup of the Orignal files:
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cp -p /opt/tomcat/webapps/manager/META-INF/context.xml /opt/tomcat/webapps/manager/META-INF/context.xml_ORIG
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Step 2: Create another server on which jenkins is installed
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cp -p /opt/tomcat/webapps/host-manager/META-INF/context.xml /opt/tomcat/webapps/host-manager/META-INF/context.xml_ORIG
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Step 3: We will create a free style job to deploy the package on a tomcat server
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plugin : deploy on container
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vi /opt/tomcat/webapps/manager/META-INF/context.xml
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vi /opt/tomcat/webapps/host-manager/META-INF/context.xml
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Step 4: we will create a pipeline job, in which we will write code to deploy on tomcats erver
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Comment the below line over both the files:
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--------------
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plugin : ssh agent
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<!-- <Valve className="org.apache.catalina.valves.RemoteAddrValve"
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Steps for deployment on a webserver:
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> on a server you are goign to install webserver
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> Start the tomcat service or start the webserver
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> Copy .war file (package) into the webapps directory of tomcat
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> restart tomcat -> so that application is deployed successfully
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Access the web application
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publicip:8080/packagename
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https://github.com/Sonal0409/DevOpsClassCodes
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Step 1: Create server on which we have to install tomcat 8
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Pre-req: Install java8 on the server
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Install tomcat
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$ cd /opt
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$ wget https://dlcdn.apache.org/tomcat/tomcat-8/v8.5.78/bin/apache-tomcat-8.5.78.tar.gz
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$ tar -xvzf apache-tomcat-8.5.78.tar.gz
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$ mv apache-tomcat-8.5.78.tar.gz tomcat
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$ cd tomcat
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$ cd bin
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$ ./startup.sh ==> tomcat will be up and running
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go to browser
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public ip:8080 ==> you will see tomcat
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Do the desired config changes in context.xml file for access manager APP
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Apply the changes in these 2 context.xml file of tomcat
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vim /opt/tomcat/webapps/host-manager/META-INF/context.xml
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vim /opt/tomcat/webapps/manager/META-INF/context.xml
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comment this line in the contxt.xml
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<Valve className="org.apache.catalina.valves.RemoteAddrValve"
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allow="127\.\d+\.\d+\.\d+|::1|0:0:0:0:0:0:0:1" />
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commented in both the files
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<!-- <Valve className="org.apache.catalina.valves.RemoteAddrValve"
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allow="127\.\d+\.\d+\.\d+|::1|0:0:0:0:0:0:0:1" /> -->
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Restarted Tomcat:
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cd /opt/tomcat/bin
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./shutdown.sh
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./startup.sh
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Create users:
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vi /opt/tomcat/conf/tomcat-users.xml
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Addd these Roles and users at the end of the file:
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<role rolename="manager-gui" />
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<role rolename="manager-script" />
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<role rolename="manager-jmx" />
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<role rolename="manager-status" />
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<user username="admin" password="admin" roles="manager-gui, manager-script, manager-jmx, manager-status" />
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<user username="deployer" password="deployer" roles="manager-script" />
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<user username="tomcat" password="s3cert" roles="manager-gui" />
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Restarted Tomcat:
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cd /opt/tomcat/bin
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./shutdown.sh
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./startup.sh
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Create roles & credentials
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****
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$ cd conf
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$ vim tomcat-users.xml
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at the end before </tomcat-users> add these roles
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<role rolename="manager-gui"/>
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<role rolename="manager-script"/>
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<role rolename="manager-jmx"/>
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<role rolename="manager-status"/>
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<user username="admin" password="admin" roles="manager-gui, manager-script, manager-jmx, manager-status"/>
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<user username="deployer" password="deployer" roles="manager-script"/>
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<user username="tomcat" password="s3cret" roles="manager-gui"/>
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Save the file
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$ cd bin
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$ ./shutdown.sh
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$ ./startup.sh
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publicip:8080
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click on managerapp
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username: tomcat
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password:s3cret
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you can now see the manager app
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Step 2: Create another server on which jenkins is installed - complete
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Start jenkins
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publicip:8080
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Install a plugin : Deploy to container Plugin
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Create a free style job
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give the repo name
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give the trigger
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build step --> invoike top level maven target
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goal as : clean install package
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Post build actions
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select deploy war/ear on container
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WAR/EAR files : **/*.war
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Containers:
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click on add container--> select tomcat 8
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Select credentials
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and give tomcat URL
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Build the job
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Deployment complete
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****************************************

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