Freaks City

System Prerequisites Before installing Jenkins, ensure your Linux environment has the necessary Java Runtime Environment (JRE) or Java Development Kit (JDK). Modern versions of Jenkins (starting from 2.357 and LTS 2.361.1) require Java 11 or Java 17. Installing JDK 17 The following script automates the download and configuration of OpenJDK 17. ...

Target Setup Download the target machine image from: https://download.vulnhub.com/jarbas/Jarbas.zip Configure the virtual machine in NAT mode to reside on the same subnet as the attacking system. Attacker IP (Kali): 192.168.88.133 Information Gathering Host Discovery Perform subnet scanning to identify active hosts: sudo nmap -sn 192.168.88.0/2 ...

Recent time due to the pandemic provided a lot of free time. I had previously done some learning about Docker, but kept running various commands without much progress. Recently, I revisited the topic and want to share some issues encountered along the way. Ubuntu is installed on a desktop machine, and I found virtual machines too cumbersome. I ...

Jenkins sits at the heart of the DevOps toolchain, and CI/CD pipelines require writing Pipeline scripts. Getting started with Jenkins is straightforward—after a quick look at the documentation, concepts like agent, stages, and steps become clear, and you can quickly scaffold a pipeline. However, when filling in the details, particularly how to ...

Testing Shifts and Continuous Integration Modern software development practices involve testing early in the lifecycle (shift-left) and extending testing into production (shift-right). Continuous Integration (CI) is a core DevOps practice where developers frequently merge code changes into a central repository. Automated builds and tests run on ...

Install OpenJDK 21 Download the JDK binary: wget https://mirrors.huaweicloud.com/openjdk/21/openjdk-21_linux-x64_bin.tar.gz Extract and relocate to /usr/local: sudo tar -xzf openjdk-21_linux-x64_bin.tar.gz -C /usr/local/ ls /usr/local/jdk-21/ Update system-wide environment variables by editing /etc/profile: export JAVA_HOME=/usr/local/jdk-2 ...

Prerequisites A functional Kubernetes cluster with Traefik installed as the ingress controller. Network File System (NFS) storage mounted across all nodes to ensure Jenkins configuration survives pod restarts. A private Docker registry accessible at 192.168.0.153:5000. The base environment uses an Alpine LNP stack (PHP 5.6.31 and Nginx 1.8.1) a ...

Constructing a Java Deployment Automation Tool Using Jenkins Overview of the Process The following outlines the procedure for developing a Java deployement automation tool utilizing Jenkins. Step-by-Step Implementation 1. Initialize the Jenkins-based Project Begin by setting up a new Maven project, which serves as the foundation for the deploym ...

CI/CD Workflow Overview Transitioning from traditional virtual machine-based CI/CD to a Kubernetes-native approach offers significant advantages in resource utilization and environment consistency. Traditional Workflow: CI: Developers push code to GitLab -> Jenkins triggers build on a static slave -> Code scanning and compilation -> A ...

Pull the Jenkins Docker image. docker pull jenkins/jenkins Set up a persistent storage directory on the host and adjust permissions. mkdir -p /var/jenkins_data chmod 777 /var/jenkins_data Launch a Jenkins container with custom configurations. -d runs the container in detached mode. -p 10240:8080 maps the container's Jenkins web interfac ...