Continuous integration and Jenkins

In a production environment, the software is developed and compiled frequently. In addition to this, it needs to be tested quite a few times. With each change in the source code, it is necessary to start the whole process over again.

Jenkins automates all these tasks quickly and easily. So, the process where all the changes and functions of the application in development are automatically verified is called continuous integration.

In this sense, using Jenkins the developer will know at all times the status of his application. Failures, new features, and processes will be automated and monitored with Jenkins.

Install Jenkins on Ubuntu 20.04

Because it is an application created in Java, Jenkins can be installed on any system that supports this programming language.

However, we will use a dedicated repository to make the installation even easier. Also, it will help to have recent versions of the application.

1.- Install Java on Ubuntu 20.04

Jenkins is made in Java, so the first step is to install Java on Ubuntu 20.04

Previously, only the application supported Java 8, but now it also supports Java 11.

So to install Java just run the following command:

:~$ sudo apt install openjdk-11-jre openjdk-11-jdk
Reading package lists… Done
Building dependency tree
Reading state information… Done
The following additional packages will be installed:
at-spi2-core ca-certificates-java fonts-dejavu-extra java-common libatk-bridge2.0-0 libatk-wrapper-java libatk-wrapper-java-jni libatk1.0-0 libatk1.0-data
libatspi2.0-0 libdrm-amdgpu1 libdrm-intel1 libdrm-nouveau2 libdrm-radeon1 libfontenc1 libgif7 libgl1 libgl1-mesa-dri libglapi-mesa libglvnd0 libglx-mesa0 libglx0
libice-dev libice6 libllvm9 libnspr4 libnss3 libpciaccess0 libpcsclite1 libpthread-stubs0-dev libsensors-config libsensors5 libsm-dev libsm6 libvulkan1
libwayland-client0 libx11-dev libx11-xcb1 libxau-dev libxaw7 libxcb-dri2-0 libxcb-dri3-0 libxcb-glx0 libxcb-present0 libxcb-randr0 libxcb-shape0 libxcb-sync1
libxcb1-dev libxcomposite1 libxdamage1 libxdmcp-dev libxfixes3 libxft2 libxi6 libxinerama1 libxkbfile1 libxmu6 libxrandr2 libxrender1 libxshmfence1 libxt-dev libxt6
libxtst6 libxv1 libxxf86dga1 libxxf86vm1 mesa-vulkan-drivers openjdk-11-jdk-headless openjdk-11-jre-headless x11-common x11-utils x11proto-core-dev x11proto-dev
xorg-sgml-doctools xtrans-dev
Suggested packages:
default-jre libice-doc pcscd lm-sensors libsm-doc libx11-doc libxcb-doc libxt-doc openjdk-11-demo openjdk-11-source visualvm libnss-mdns fonts-ipafont-gothic
fonts-ipafont-mincho fonts-wqy-microhei | fonts-wqy-zenhei fonts-indic mesa-utils
The following NEW packages will be installed:
at-spi2-core ca-certificates-java fonts-dejavu-extra java-common libatk-bridge2.0-0 libatk-wrapper-java libatk-wrapper-java-jni libatk1.0-0 libatk1.0-data
libatspi2.0-0 libdrm-amdgpu1 libdrm-intel1 libdrm-nouveau2 libdrm-radeon1 libfontenc1 libgif7 libgl1 libgl1-mesa-dri libglapi-mesa libglvnd0 libglx-mesa0 libglx0
libice-dev libice6 libllvm9 libnspr4 libnss3 libpciaccess0 libpcsclite1 libpthread-stubs0-dev libsensors-config libsensors5 libsm-dev libsm6 libvulkan1
libwayland-client0 libx11-dev libx11-xcb1 libxau-dev libxaw7 libxcb-dri2-0 libxcb-dri3-0 libxcb-glx0 libxcb-present0 libxcb-randr0 libxcb-shape0 libxcb-sync1
libxcb1-dev libxcomposite1 libxdamage1 libxdmcp-dev libxfixes3 libxft2 libxi6 libxinerama1 libxkbfile1 libxmu6 libxrandr2 libxrender1 libxshmfence1 libxt-dev libxt6
libxtst6 libxv1 libxxf86dga1 libxxf86vm1 mesa-vulkan-drivers openjdk-11-jdk openjdk-11-jdk-headless openjdk-11-jre openjdk-11-jre-headless x11-common x11-utils
x11proto-core-dev x11proto-dev xorg-sgml-doctools xtrans-dev
0 upgraded, 77 newly installed, 0 to remove and 0 not upgraded.
Need to get 294 MB of archives.
After this operation, 789 MB of additional disk space will be used.
Do you want to continue? [Y/n]

Accept the installation and Java will be ready for work.

Also read:

How to install Oracle Java 14 on Ubuntu 20.04

2.- Install Jenkins on Ubuntu 20.04

Now you have to add the Jenkins repository. But first, add the GPG key to secure the repository. Make sure you have the package apt-transport-https installed.

:~$ sudo apt install apt-transport-https

:~$ wget -q -O - https://pkg.jenkins.io/debian-stable/jenkins.io.key | sudo apt-key add -
OK

Now add the repository to the system’s source list:

:~$ sudo apt-add-repository "deb https://pkg.jenkins.io/debian-stable binary"

And then, he proceeds to install Jenkins in Ubuntu.

:~$ sudo apt update
:~$ sudo apt install jenkins
Reading package lists… Done
Building dependency tree
Reading state information… Done
The following additional packages will be installed:
daemon net-tools
The following NEW packages will be installed:
daemon jenkins net-tools
0 upgraded, 3 newly installed, 0 to remove and 47 not upgraded.
Need to get 65.5 MB of archives.
After this operation, 67.4 MB of additional disk space will be used.
Do you want to continue? [Y/n]

Jenkins is handled in the system as a service. Therefore, you can check the status with the following command:

:~$ sudo systemctl status jenkins
● jenkins.service - LSB: Start Jenkins at boot time
Loaded: loaded (/etc/init.d/jenkins; generated)
Active: active (exited) since Thu 2020-05-14 05:32:17 UTC; 1min 45s ago
Docs: man:systemd-sysv-generator(8)
Tasks: 0 (limit: 506)
Memory: 0B
CGroup: /system.slice/jenkins.service
May 14 05:32:10 osradar systemd[1]: Starting LSB: Start Jenkins at boot time…
May 14 05:32:13 osradar jenkins[9478]: Correct java version found
May 14 05:32:14 osradar jenkins[9478]: * Starting Jenkins Automation Server jenkins
May 14 05:32:14 osradar su[9519]: (to jenkins) root on none
May 14 05:32:14 osradar su[9519]: pam_unix(su-l:session): session opened for user jenkins by (uid=0)
May 14 05:32:17 osradar jenkins[9478]: …done.
May 14 05:32:17 osradar systemd[1]: Started LSB: Start Jenkins at boot time.

As you can see, everything is going well. If an error occurs, it is probably a question of a lack of RAM memory.

Jenkins takes the issue of security very seriously, therefore, the installer generates a temporary key to continue with the installation.

To show it, just run the following command:

:~ sudo cat /var/lib/jenkins/secrets/initialAdminPassword

So, in my case, this is the password.

3596a99b1f384a9db3e0eab32c59fe1d

Also, it doesn’t have to be the same as mine.

3.- Complete the Jenkins installation

Now open your favorite web browser and go to http://your-server:8080 and complete the installation.

The first thing you will see is that you will be prompted for the temporary password that we have shown above.

Then, you will be able to customize the Jenkins installation. You can either install the recommended plugins or choose the ones you want. I have chosen the first option.

Then the installation of the plugins will start.

So, when it is finished, you will have to create the administrator user.

Now, you will see the configuration of the Jenkins instance.

Then, you will see this screen indicating that everything has gone well and that you can use Jenkins.

Finally, you will see the dashboard of Jenkins on Ubuntu 20.04

So, Jenkins is ready for the action.

Conclusion

Jenkins is a very important application in the current and facilitates many tasks dedicated to the life process of software. So, despite that, it is very easy to install in Ubuntu 20.04

So, please share this post, join our Telegram channel. And if you can, buy us a coffee.

The post How to install Jenkins on Ubuntu 20.04? appeared first on Linux Windows and android Tutorials.

Jenkins It is a server-based system that runs in servlet containers such as Apache Tomcat. Jenkins supports version control tools, including AccuRev, CVS, Subversion, Git, Mercurial, Perforce, TD/OMS, ClearCase, and RTC, and can execute Apache Ant, Apache Maven, and sbt based projects as well as arbitrary shell scripts and Windows batch commands.

This provides hundreds of plugins to support building, deploying and automating any project under MIT license.

Just login as root user and follow below steps.

Step 1- Upgrade System

The very first step should update your system so everything will upto date and you will get secure.

dnf update -y

Step 2- Install JAVA

As I mentioned earlier Jenkins is build in JAVA, so we have to install JAVA on the server so we can use jenkins properly.

dnf install -y  java-1.8.0-openjdk

Now verify java version

java -version

Step 3: Adding Jenkins Repository

Now, we will add Jenkins Repository in Centos 7 / RHEL 8 so we can install it as Jenkins did not come with CentOS default repository.

First, install wget package is no installed already

dnf install -y wget

Then, download and enable Jenkins Repository

wget -O /etc/yum.repos.d/jenkins.repo https://pkg.jenkins.io/redhat-stable/jenkins.repo

Now, import Jenkins GPG Key

rpm --import https://pkg.jenkins.io/redhat-stable/jenkins.io.key

Step 4- Install Jenkins on your CentOS 8 / RHEL 8 system

dnf install -y jenkins

Step 5- Start and Enable Jenkins Service

Now you have to start jenkins service so we can use it and enable it on boot so if system will reboot jenkins will start automatically

systemctl start jenkins
systemctl enable jenkins
systemctl status jenkins 

Step 6- Configure Firewall

You know Jenkins is works on port 8080 so we need to allow connection on that port by adding it in firewall.

firewall-cmd --zone=public --permanent  --add-port=8080/tcp
firewall-cmd --reload

Step 7- Setting Up Jenkins

Finally, everything is working fine as jenkins is installed successfully, now we you need to open your web browser and access jenkins using below URL:

YOUR-SERVER-IP:8080

You will see below page asking for Admin password to Unlock jenkins, when you browse the URL first time.

A path is also display on the page in which the password is saved, so go to your Linux terminal and issue following command to get the password.

cat /var/lib/jenkins/secrets/initialAdminPassword

Now, copy the password and paste it into the “Administrator password” box and click Continue.

So you will be asked if you want to install the suggested plugins or install additional plugins. I choose “install the suggested plugins” option you can choose your desired and the installation process will start immediately.

Note: If you are facing any issue during plugins installation, Click on “Select plugins to install” option then un-select all plugins. You can install desired plugins from jenkins dashboard also.

Now, create an admin account which will be used to manage the Jenkins server.

Then, you need to set Jenkins URL, set a URL or leave it as default and click on Save and Finish button.

Finally, everything has been done, click on “Start using Jenkins” button

and you will redirect to the Jenkins dashboard.

That’s it.

Jenkins allows you to deploy and automate important tasks for application development in an enterprise environment. However, it requires some previous knowledge of Linux.

The post How to install jenkins on CentOS 8 / RHEL 8 appeared first on Linux Windows and android Tutorials.

Installing Java SDK

In the first place, we need to download and install Java Development Kit JDK. Now, download the latest Jenkins package for Windows from here.

Installing Jenkins step by step

Unzip the file to any folder and click on the Jenkins EXE file.

Click Next to start the installation.

Select the folder to installation, if you want to change it, click on Change, if you do not, just click on Next.

Once the installation´s options had been set, we can click on Install to start the installation process.

When installer fishiness its job, click on Finish

Immediately, a web browser with a local Jenkins page will show up, if it not, we can paste the URL http://localhost:8080 in a browser.

Go to the indicated location and open the file with Notepad.

To unlock Jenkins, copy the password from the file at C:\Program Files (x86)\Jenkins\secrets\initialAdminPassw ord and paste it in the Administrator password field. Then, click the Continue button.

Then, we process to install plugins, either the suggested plugins or selected plugins we want. For now, please select the selected plugins and wait until plugin´s installation be completed

Once the plugin installation is succeeded, we have to create our credentials ton management Jenkins. Put in your details and click Save and Continue

Now, we have to choose the URL information where we can configure the default instance path for Jenkins. To avoid confusion, the software itself recommend setting this value to the URL. Click Save and Continue to finish the installation.

Hit the Start using Jenkins to start Jenkins

Finally, we had installed Jenkins successfully. A Dashboard will be appear. From now we can create our first Jenkins Jobs.

Conclussion

As has been noted, the Jenkins installation is an easy e intuitive proceed to do. However, this is a powerful tool to improve our developing works. I hope you can use this information to futures jobs and also I invited you to see our post about how to install an FTP server on Windows Server 2019.

The post How to install Jenkins on Windows 10. appeared first on Linux Windows and android Tutorials.

Install Docker and Docker-compose

The first thing to do is to install Docker and Docker compose in our system. In the case of Debian 10, there is a tutorial of ours that you can use as a guide.

For the rest of the distributions, it is a good idea to read Docker’s official documentation. Anyway, it is not hard to do.

Deploy Jenkins using Docker-compose

As we explained in the post to deploy LAMP using Docker-compose, the definitions of images and their options, we do them in a file with the extension YML. To do this, it is recommended to first make a folder and within it create the file.

So, open a terminal session and type the following:

:~$ mkdir jenkins && cd jenkins

Once we have entered the folder using your favorite text editor proceed to create the docker-compose.yml file.

:~$ nano docker-compose.yml

Once inside, we will begin to define the content.

version: '2'
services:
  jenkins:
  image: 'bitnami/jenkins:2'

First the basic file definitions. The version to use will be the 2. And we will deploy only a service that will be called jenkins. For it, we will use the image Jenkins of bitnami. It is very well documented and quite reliable.

Then, we continue with the definition of the options.

ports:
      - '80:8080'
      - '443:8443'
      - '50000:50000'
    volumes:
      - 'jenkins_data:/bitnami'
volumes:
  jenkins_data:
  driver: local

In this section, you define the ports that the image will use. Remember that Jenkins uses the 8080 but we will access the 8080 port of the image through the 80. So, the 443 is for secure connections with Jenkins.

Equally, with LAMP, it is advisable to mount a volume for the Jenkins data. And at the end of the file, we refer to the options of that volume.

So, the file will be completed as follows:

version: '2'
services:
  jenkins:
    image: 'bitnami/jenkins:2'
    ports:
      - '80:8080'
      - '443:8443'
      - '50000:50000'
    volumes:
      - 'jenkins_data:/bitnami'
volumes:
  jenkins_data:
  driver: local

We can now raise the image, but I want to show you a few more options.

Some useful options to deploy Jenkins

This Jenkins image is customizable thanks to environment variables that can be modified. Some of them are these:

• JENKINS_USERNAME: Jenkins admin username.
• JENKINS_PASSWORD: Jenkins admin password.
• JENKINS_HOME: Jenkins home directory.
• DISABLE_JENKINS_INITIALIZATION: Allows to disable the initial Bitnami configuration for Jenkins.
• JAVA_OPTS: Customize JVM parameters.

To use and modify them, just add them to the file in the environment section. For example:

jenkins:
  ...
  environment:
    - JENKINS_PASSWORD=your-password
  ...

Note: by default the user is user and the password is bitnami. Then, you can modify it from Jenkins once it has been deployed.

Running and testing Jenkins

Once you have finished defining the docker-compose file. Now we can execute it with the following command:

:~$ sudo docker-compose up -d

Next, open your web browser and go to your server using the port 80.

Then, login into the application using the default credentials or yours.

After that, you will see the dashboard.

And that is it.

Conclusion

Jenkins is a very popular application and it is possible to install it on our server using docker. This way we save a lot of time on some operating-system configurations. However, for total control of it, it is advisable to do it manually.

You can read How to install Jenkins on Debian 10?

Please share this post and join our Telegram channel.

The post How to deploy Jenkins using docker-compose? appeared first on Linux Windows and android Tutorials.

Continuous integration and Jenkins

In a production environment, the software is developed and compiled frequently. In addition to this, it needs to be tested quite a few times. With each change in the source code, it is necessary to start the whole process over again.

Jenkins automates all these tasks quickly and easily. So, the process where all the changes and functions of the application in development are automatically verified is called continuous integration.

In this sense, using Jenkins the developer will know at all times the status of his application. Failures, new features, and processes will be automated and monitored with Jenkins.

Install Jenkins on Debian 10 Buster

One of the great advantages of Jenkins is that it is cross-platform. This is because it is built in Java. Therefore, it can be installed on almost all Linux distributions without any problems. Of course, also in Debian 10.

However, there are some small things to keep in mind. First of all, it is necessary to have a user with sudo or to be root users.

Read how to enable sudo on Debian 10?

On the other hand, you have to have Java installed and know how to use the terminal. So, let us start.

1) Install Java on Debian 10

First of all, you must have Java installed. This is vital because Jenkins is made in Java. So open a terminal and run the following command:

:~$ sudo apt install default-jre default-jdk

Then, check the Java version.

:~$ java --version
openjdk 11.0.3 2019-04-16
OpenJDK Runtime Environment (build 11.0.3+7-post-Debian-5)
OpenJDK 64-Bit Server VM (build 11.0.3+7-post-Debian-5, mixed mode, sharing)

Now, Java is correctly installed.

2) Add the Jenkins repository on Debian 10

Jenkins is a vital program in professionally deploying software. So, to install it, it requires a safe and reliable method from Jenkins developers. For this purpose and to facilitate the installation, they have made available a software repository.

So, add it to our Debian 10 Buster. First, install some necessary packages:

:~$ sudo apt install apt-transport-https wget gnupg

Then, add the GPG key for the repository.

:~$ wget -q -O - https://pkg.jenkins.io/debian-stable/jenkins.io.key | sudo apt-key add -
OK

Now add edit the file /etc/apt/sources.list and add the following. To do this, I will use the nano text editor.

:~$ sudo nano /etc/apt/sources.list
deb https://pkg.jenkins.io/debian-stable binary/

Next, save the changes (CTRL + O) and close the file (CTRL +X).

3) Install Jenkins on Debian 10 (I)

Then, refresh APT and install Jenkins on Debian 10 using the following commands:

:~$ sudo apt update
:~$ sudo apt install jenkins

You can check the service status by running this command:

:~$ sudo systemctl status jenkins

As you can see, the service is running smoothly. Now, you need to get the default superuser key. To do this, run this command:

:~$ sudo cat /var/lib/jenkins/secrets/initialAdminPassword
6dcefe440e474daea0f4b85ace1ad954

Now, complete the installation using the web browser.

3) Install Jenkins on Debian 10 (II)

Now we have to go to the server and complete the installation. Open your web browser and go to http://server-ip:8080 Remember that Jenkins uses port 8080 by default. You will see this. Just, type the root password and continue.

Then, create the admin user.

After that, you can choose the plugins you want to activate. Whether they are suggested or others.

Then, after a couple of confirmation and information windows. You will be on the Jenkins dashboard.

Enjoy it. 😀

Conclusion

In this post, you have learned to install Jenkins on Debian 10, Buster. It is a pretty good application for continuous integration processes. So the processes inherent to the software development can be automated giving the developer truthful and accurate information about the process.

Please share this post and join our Telegram channel.

The post How to install Jenkins on Debian 10? appeared first on Linux Windows and android Tutorials.

We have already talked about Jenkins, this great application written in Java for the deployment of applications and of course, the automation of tasks concerning software and servers.

Its main feature is that it is Open Source, so the source code can be examined. On the other hand, Jenkins can be installed on Linux, Windows or Mac and thus guarantee the continuous integration of your projects regardless of the operating system. In addition, its functionality can be extended thanks to the plugins.

So, let’s start to install Jenkins on OpenSUSE 15 or SUSE 15.

1. Upgrade the system and install Java

In order for the installation to run smoothly, it is necessary to update the system. So connect to your server or open a terminal and run.

:~$ sudo zypper up

I have installed a basic version of OpenSUSE that does not have Java installed and Jenkins requires it to run. So the next step is to install Java. You need to install Java 8. So, run:

:~$ sudo zypper in java-1_8_0-openjdk

Now, check the Java version installed.

:~$ java -version

As you can see in the image, Java is installed and ready to use.

2. Install Jenkins on OpenSUSE 15 and SUSE 15

Now it’s time to install Jenkins. The easiest way to do this is through the official repository provided by Jenkins for OpenSUSE. It’s up to date and ideal.

:~$ sudo zypper addrepo -f http://pkg.jenkins.io/opensuse-stable/ jenkins

Next, install Jenkins.

:~$ sudo zypper install jenkins

Now, start the service and check the status.

:~$ sudo systemctl start jenkins
:~$ sudo systemctl status jenkins

Jenkins uses the 8080 port. So, set the Firewall rule to make Jenkins available.

:~$ firewall-cmd --zone=public --add-port=8080/tcp --permanent
:~$ firewall-cmd --zone=public --add-service=http --permanent
:~$ firewall-cmd --reload

Next, get the admin password.

:~$ sudo more /var/lib/jenkins/secrets/initialAdminPassword

The next step is open your web browser and go to http://IP_SERVER:8080. And put your password on the field.

Then you will be asked about the plugins to install. Choose the recommended plugins. Then, the installer wll start the work.

Next, create the admin account.

And that’s it. Jenkins is installed. Finally, you will see the dashboard.

Conclusion

As you can see, the installation of Jenkins in the SUSE ecosystem is not difficult. On the contrary, there is a repository that makes everything simple. Jenkins is an application that every sysadmin should use for the automation and deployment of software projects.

So, please share this article in your social networks.

The post How to install Jenkins on OpenSUSE 15 / SUSE 15? appeared first on Linux Windows and android Tutorials.

Jenkins is an open source automation server, that provides hundreds of plugins to support building, deploying and automating any project. I’m talking about an open source application, released under the MIT license. In addition, It also requires Java for its correct execution because this is the language where it was developed.

Why Jenkins?

With Jenkins, you can automate your work-flow in large-scale application development with seamless integration.

The concept of Continuous Integration refers to a model in which a source code must be compiled and run from time to time in order to detect bugs and generate reports to improve it.

To put it another way, developers soon upload their source code to the version control repository, it is compiled, executed, and finally tested. Jenkins automates this process and makes it almost routine. However, Jenkins’ power is not limited to this.

Let’s install it on CentOS 7.

0. What you need

The purpose of this tutorial is to install Jenkins on CentOS 7. The process is not complex, but some things are required before starting:

• It is necessary to execute commands as the root user.
• The terminal is the most powerful and versatile tool Linux has. Today you will use it quite a lot, so it is recommended that you have some previous knowledge about its use.
• The team must have CentOS 7 if you use Ubuntu 18.04 this tutorial is not for you. But this one is.

1.- Upgrade the system

I always recommend updating the system, before performing any installation. Because you can get the latest security updates and thus have a more protected and reliable system.

:~$ su -
:~# yum update

As I said before, doing this gives the system more secure.

2. Install Java

Jenkins requires Java to run properly, so you have to install it to continue the installation.

:~# yum install java-1.8.0-openjdk

Once the installation is complete, check the installed Java version.

:~# java -version

As you can see in the image, Java has been correctly installed.

3. Add the Jenkins Repository

Jenkins does not come by default in the CentOS 7 repositories. So we have two ways to install it. The first is to download the package in .rpm format and install it. The second is to add the repository and install it using yum. For this tutorial, I will choose the second option.

First, download the repo file.

:~# wget -O /etc/yum.repos.d/jenkins.repo https://pkg.jenkins.io/redhat-stable/jenkins.repo

Then, import the GPG key.

:~# rpm --import https://pkg.jenkins.io/redhat-stable/jenkins.io.key

Finally, install Jenkins.

:~# yum install Jenkins

At the end of the download, Jenkins will be installed on the computer.

Then, enable Jenkins service to start at the system startup.

:~# systemctl enable jenkins
:~# systemctl start jenkins

Next, check the Jenkins status.

:~# systemctl status jenkins

As you can see in the image, Jenkins is correctly running.

4. Setting the firewall rules

We know that CentOS 7 takes the security of the system very seriously and that is why the firewall does not allow any connection by default. For Jenkins to work, the firewall must allow connections through port 8080.

:~# firewall-cmd --zone=public --add-port=8080/tcp --permanent
:~# firewall-cmd --zone=public --add-service=http --permanent
:~# firewall-cmd --reload

Now, Jenkins can work well.

5. Access Jenkins web interface

Jenkins has a configuration panel with a web interface. However, before accessing the panel, it is necessary to obtain the administrator password. To do this, run the following:

#grep -A 5  password /var/log/jenkins/jenkins.log

Now, you can go to the web browser and open http://IP_SERVER:8080 and you will see this screen.

As you can see, you have to enter the password you have previously obtained.

When you set the password, you will be asked if you want to install additional plugins. I will choose to install the suggested plugins.

The installer will then complete the installation.

Next, you will need to enter information about the user to be created. Enter your username, password and email address.

When the installation is complete, you can access the Jenkins main screen.

So, that’s it.

Conclusion

Jenkins allows you to deploy and automate important tasks for application development in an enterprise environment. To install it is not complicated in a CentOS 7 system. However, it requires some previous knowledge of Linux.

Please spread this article through your social networks.

The post How to install Jenkins on CentOS 7? appeared first on Linux Windows and android Tutorials.

Each integration is verified by compiling the source code and obtaining an executable (this is called a build, and must be done automatically), and quality tests and metrics are also passed to detect errors as soon as possible.

Written in Java and accessible via web interface, Jenkins is multiplatform and has recently established itself as one of the most widely used tools for continuous integration tasks. By integration we mean the compilation and execution of tests of an entire project.

Why this?

In today’s world of DevOps, continuous delivery and deployment are critical to delivering high-quality software products faster than ever before. Some of the advantages of Jenkins is that it is an open source, continuous integration server written in Java.

Use Jenkins to automate your development workflow so you can focus on work that matters most. Jenkins is commonly used for:

• Building projects
• Running tests to detect bugs and other issues as soon as they are introduced
• Static code analysis
• Deployment

Execute repetitive tasks, save time, and optimize your development process with Jenkins.

Installing Jenkins

The first thing we need to do is to update the system to get the latest security updates:

                  sudo apt update && sudo apt -y upgrade

One of Jenkins’ dependencies is Java 8. So we have to install it.

                   sudo apt install openjdk–8–jre

This is because Ubuntu 18.04 comes with Java 9 by default, but Jenkins still uses Java 8, so if we try to install it, its execution will fail.

We then install a package necessary for Jenkinks installation to be effective.

            sudo apt install apt-transport-https

We now proceed to add the Jenkins repository. First we add the security key.

wget -q -O – https://pkg.jenkins.io/debian-stable/jenkins.io.key | sudo apt-key add –

And then, the repository is added as such

               sudo apt-add-repository “deb https://pkg.jenkins.io/debian-stable binary/”

Before installing Jenkins, we must “configure” java with the following command:

               sudo update-alternatives –config java

In the displayed box we indicate that the default Java should be 8.

Now we can install Jenkins from its added repository:

             sudo apt install jenkins

And we checked the status of the service:

             sudo systemctl status jenkins

In the previous image, we can notice that the service is running.

Before entering the Jenkins web panel, we must generate the administrator password:

             sudo cat /var/lib/jenkins/secrets/initialAdminPassword

Testing the installation

Now we can go to the web browser and access Jenkins on port 8080.

            http://IP_Server:8080

We set the administrator password andwe press continue button.

In the next window, you will be asked for user information, password and full name for set the first admin user.

Below is information from the Jenkins instance.

We click on “Save and Finish” and you are already telling us that we have installed Jenkins properly.

Now we’ll see Jenkins’ initial panel working.

Using this type of tools substantially increases productivity in companies that seek to automatically perform certain processes related to projects.

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