[jenkins] How to change port for jenkins window service when 8080 is being used

I installed Jenkins on a windows virtual server and want to run it as window service.

Since the port 8080 is being used by other service, I changed the http port to 8081 in jenkins.xml file. However, I am not able to launch localhost:8081/jenkins at all. I need detail instruction/steps to configure port 8081 or something to run Jenkins.

In linux,

sudo vi /etc/sysconfig/jenkins

set following configuration with any available port

JENKINS_PORT="8082"

If you are running on Redhat, do following

1. Stop Jenkins
   $sudo service jenkins stop

2. change port number in /etc/sysconfig/jenkins like i did for port 8081
   JENKINS_PORT="8081"

3. start Jenkins again
   $sudo service jenkins start

make sure your FW has correct burn rules.

On Windows (with Windows Service).

Edit the file C:\Program Files (x86)\Jenkins\jenkins.xml with 8083 if you want 8083 port.

<arguments>-Xrs -Xmx256m -Dhudson.lifecycle=hudson.lifecycle.WindowsServiceLifecycle -jar "%BASE%\jenkins.war" --httpPort=8083</arguments>

Restart Jenkins service

Just restart the Jenkins service after you changed the port in jenkins.xml.

1. Press Win + R
2. Type "services.msc"

3. Right click on the "Jenkins" line > Restart

   

4. Type http://localhost:8081/ in your browser to test the change.

1. Go to the directory where you installed Jenkins (by default, it's under Program Files/Jenkins)
2. Open the Jenkins.xml configuration file
3. Search --httpPort=8080 and replace the 8080 with the new port number that you wish
4. Restart Jenkins for changes to take effect

1 ) Open the jenkins.xml file
2 ) Search for the "--httpPort=8080" Text and replace the port number 8080 with your custom port number (like 7070 , 9090 )
3 ) Go to your services running your machine & find out the Jenkins service and click on restart.

On Ubuntu 16.04 LTS you can change the Port like that:

1. Change port number in the config file /etc/default/jenkins to 8081 (or the port you like) HTTP_PORT=8081
2. Restart Jenkins: service jenkins restart

You should follow 2 steps:

1. This step can be followed by running the cmd in the specific folder location where there will be .war file. This step helpful as Jenkins needs some disk space to perform builds and keep archives.

   set JENKINS_HOME=c:\folder\Jenkins
   

2. This step will be helpful to change the port number, and works can be performed accordingly.

   java -jar jenkins.war --httpPort=8585
   

Check in Jenkins.xml and update like below

<arguments>-Xrs -Xmx256m -Dhudson.lifecycle=hudson.lifecycle.WindowsServiceLifecycle -jar "%BASE%\jenkins.war" --httpPort=8090</arguments>

Use Default Port

If the default port 8080 has been bind with other process, Then kill that process.

DOS> netstat -a -o -n

Find the process id (PID) XXXX of the process which occupied 8080.

DOS> taskkill /F /PID XXXX

Now, start Jenkins (on default port)

DOS> Java -jar jenkins.war

Use Custom Port

DOS> Java -jar jenkins.war --httpPort=8008

Start Jenkins from cmd line with this command :

java -jar jenkins.war --httpPort=8081

For jenkins in a docker container you can use port publish option in docker run command to map jenkins port in container to different outside port.

e.g. map docker container internal jenkins GUI port 8080 to port 9090 external

docker run -it -d --name jenkins42 --restart always \
   -p <ip>:9090:8080 <image>