Running Jenkins in its default server will be difficult to manage sometimes. Running Jenkins behind Reverse Proxy is recommended if you want to manage Jenkins hosting and a certain level of access management in traffic. In this article, we will discuss How to Configure and Running Jenkins Behind Apache Reverse Proxy with the benefits of it. We will see the Procedure in the step by step points. Across this article, we are going to use Unix (Debian/Ubuntu and CentOS/Fedora)
Advantages of Running Jenkins behind Reverse Proxy
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LEARNING PATH: Jenkins: The Road to Effective Jenkins
1. Installing Java
Basically Jenkins needs Java (JDK) to be installed. So, we need to install by following the commands
We need to add the needed repository and enable it in to
apt-get package manager then we are going to install the
sudo apt-get install software-properties-common apt-transport-https -y sudo add-apt-repository ppa:openjdk-r/ppa -y sudo apt install openjdk-11-jdk -y java –version
In CentOS/Fedora, we just need to update the yum package manager and install
java-11-openjdk. Always check the installation by seeing version of Java
sudo yum update sudo yum install java-11-openjdk java –version
2. Installing Jenkins
Just like installing Java, We need to Update the repository of the package manager first to install Jenkins. and simply follow the following steps.
wget -q -O - https://pkg.jenkins.io/debian-stable/jenkins.io.key | sudo apt-key add - echo 'deb https://pkg.jenkins.io/debian-stable binary/' | tee -a /etc/apt/sources.list sudo apt update sudo apt install jenkins -y sudo systemctl start jenkins sudo systemctl enable jenkins
Similarly, we need to add the rpm repository to the yum package manager and follow the commands to install the Jenkins.
curl --silent --location http://pkg.jenkins-ci.org/redhat-stable/jenkins.repo | sudo tee /etc/yum.repos.d/jenkins.repo sudo rpm --import https://jenkins-ci.org/redhat/jenkins-ci.org.key sudo yum install jenkins sudo systemctl start jenkins sudo systemctl enable jenkins
1. Install Apache from Repo
Now its time to install Apache. In Debian/Ubuntu, we just need to update the
apt-get package manager and install the
sudo apt-get update sudo apt-get install apache2 -y
In CentOS/Fedora, we just need to update the
YUM package manager and install
https that is the fedora distribution name of apache.
sudo yum update sudo yum install httpd -y
2. Enable Proxy, proxy_http, headers module
On Both Debian/Ubuntu and CentOS/Fedora
sudo a2enmod proxy sudo a2enmod proxy_http sudo a2enmod headers
In order to enable
Reverse proxy, we need to enable the following modules of Apache. module headers will help us maintaining the
header information-carrying by the Jenkins while traveling through the Apache server like cache/ sessions.
3. Edit Jenkins Configuration file
We just need to make some configuration change on apache site configuration files. To do so, we just need to open the file by running the following commands.
cd /etc/apache2/sites-available/ sudo vim jenkins.conf
Then, In the file enter the following code snippet to make the Apache works for Jenkins. Then, In this
ServerName should be your domain name,
ProxyPass should point your localhost point to Jenkins (Port 8080) and
ProxyPassReverse should be added for both localhost address and Domain address. In the
<proxy> block, we need to give access to the apache to handle the Jenkins.
<Virtualhost *:80> ServerName your-domain-name.com ProxyRequests Off ProxyPreserveHost On AllowEncodedSlashes NoDecode <Proxy http://localhost:8080/*> Order deny,allow Allow from all </Proxy> ProxyPass / http://localhost:8080/ nocanon ProxyPassReverse / http://localhost:8080/ ProxyPassReverse / http://your-domain-name.com/ </Virtualhost>
4. Enable and Restart Jenkins
Then, we have to enable the new configuration file of Apache and restart the Apache and Jenkins to reflect all the changes we have made so far. To do so, run the following commands
sudo a2ensite jenkins sudo systemctl restart apache2 sudo systemctl restart jenkins
By default, Jenkins will run in 8080. Since we have configured apache reverse proxy which will work only with HTTP(80), HTTPS(443) ,and SSH access on port 22.
sudo ufw allow ssh sudo ufw allow http sudo ufw allow https
Now, enable firewall by passing following command.
That’s all. Now on, your Jenkins server will run behind the Apache’s Reverse Proxy.
As we have many benefits of running Jenkins behind Apache Reverse Proxy, we have discussed in detail How to Configure and Running Jenkins Behind Apache Reverse Proxy. In our upcoming article, we will discuss more on Jenkins and its advanced configurations. Stay tuned and subscribe DigitalVarys for more articles and study materials on DevOps, Agile, DevSecOps, and App Development.
Experienced DevSecOps Practitioner, Tech Blogger, Expertise in Designing Solutions in Public and Private Cloud. Opensource Community Contributor.