Jenkins installation - Yum installation and Docker installation

Jenkins installation

Yum install Jenkins

To install Jenkins on CentOS 7, you can follow these steps:

1. Update system packages:

sudo yum update

1. Install Java Development Kit (JDK). Jenkins requires Java to run. You can choose to install OpenJDK or Oracle JDK. The following is an example command to install OpenJDK:

sudo  yum install fontconfig java-11-openjdk

2. Import the GPG key for the Jenkins repository:

sudo rpm --import https://pkg.jenkins.io/redhat-stable/jenkins.io-2023.key --no-check-certificate

3. Install Jenkins:

sudo yum install jenkins

4. Start the Jenkins service:

sudo systemctl start jenkins && sudo systemctl daemon-reload

5. Configure Jenkins to start automatically at boot:

sudo systemctl enable jenkins

6. Open the firewall port to allow access to Jenkins’ web interface:

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

http://your_server_ip:8080You can now access the Jenkins web interface by typing in your web browser and follow the on-screen instructions to complete the Jenkins installation setup.

Please note that installing Jenkins may take some time depending on your internet connection speed and system configuration.

View password

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

Docker install Jenkins

docker run \
   -u root \
   --rm \
   -d \
   -p 8080:8080 \
   -p 50000:50000 \
   -v jenkins-data:/var/jenkins_home \
   -v /var/run/docker.sock:/var/run/docker.sock \
   jenkinsci/blueocean
   
Unable to find image 'jenkinsci/blueocean:latest' locally
latest: Pulling from jenkinsci/blueocean
213ec9aee27d: Pull complete 
9fb6b045bfc8: Pull complete 
1a7d7223e42d: Pull complete 
8f2b061b68da: Pull complete 
bba48a821480: Pull complete 
0061c72f26bd: Pull complete 
f65ed3fbea93: Pull complete 
3509f53c6b7b: Pull complete 
28ea9c56d127: Pull complete 
b3b3ea5ca7f4: Pull complete 
e5ecc395b9e7: Pull complete 
a4cea1bad4ff: Pull complete 
d2d0e6e9298c: Pull complete 
f786c314ed83: Pull complete 
Digest: sha256:f27933313986f7fb0b5784aa6520ebddc455ce258cbf4d13a3e3cf9d4c94d992
Status: Downloaded newer image for jenkinsci/blueocean:latest
3f48f3cace6f56061dc2ba8d4d49a55e58d6c36a5dd40ac239a7715fa11f8883   

Start up and visit ip:8080

View password

[root@test jvm]# docker ps
CONTAINER ID   IMAGE                 COMMAND                  CREATED         STATUS         PORTS                                                                                      NAMES
3f48f3cace6f   jenkinsci/blueocean   "/sbin/tini -- /usr/…"   4 minutes ago   Up 4 minutes   0.0.0.0:8080->8080/tcp, :::8080->8080/tcp, 0.0.0.0:50000->50000/tcp, :::50000->50000/tcp   compassionate_torvalds
23b7595758f6   app:0.0.1             "/bin/sh -c 'java -j…"   3 days ago      Up 3 days      0.0.0.0:8888->8888/tcp, :::8888->8888/tcp                                                  pedantic_curran

[root@test jvm]# docker exec -it 3f48f3cace6f /bin/bash
bash-5.1# cat /var/jenkins_home/secrets/initialAdminPassword
0e458fdef7d1402186537c3a66428c4a

The account is: admin

Copy the password

Successful installation