vault backup: 2026-06-03 02:13:53

devop_note/video/Jenkins Introduction and Usage.md

@@ -0,0 +1,106 @@
+---
+title: "Jenkins: Basic Introduction and Project Usage Guide"
+tags:
+  - jenkins
+  - devops
+  - cicd
+  - automation
+  - guide
+created: 2026-06-03
+---
+
+# Jenkins: Basic Introduction and Project Usage Guide
+
+Jenkins is the world's most popular open-source automation server. It helps developers automate the parts of software development related to building, testing, and deploying, facilitating **Continuous Integration (CI)** and **Continuous Delivery (CD)**.
+
+## 1. Core Concepts
+
+- **Controller (Master):** The central brain that handles the UI, job scheduling, and configuration.
+- **Agent (Node):** Machines that do the actual work (running builds/tests). *Best Practice: Always run builds on agents, not the controller.*
+- **Pipeline:** A user-defined model of a CD pipeline. It defines your entire build process, which typically includes stages for building, testing, and delivering.
+- **Jenkinsfile:** A text file that contains the definition of a Jenkins Pipeline and is checked into source control (Git).
+
+## 2. How to Use Jenkins for Your Project
+
+The modern way to use Jenkins is **Pipeline as Code** using a `Jenkinsfile`.
+
+### Step 1: Create a `Jenkinsfile`
+In the root of your project repository, create a file named `Jenkinsfile` (no extension).
+
+### Step 2: Define Your Pipeline
+Here is a standard **Declarative Pipeline** template you can adapt:
+
+```groovy
+pipeline {
+    agent any // Tells Jenkins to run this pipeline on any available agent
+
+    environment {
+        // Define environment variables here
+        APP_NAME = "my-awesome-project"
+    }
+
+    stages {
+        stage('Checkout') {
+            steps {
+                // Jenkins automatically checks out code, but you can add custom logic
+                echo "Checking out code for ${APP_NAME}..."
+            }
+        }
+
+        stage('Build') {
+            steps {
+                echo 'Building...'
+                // Example for a Node.js project:
+                // sh 'npm install'
+                // Example for a Java/Maven project:
+                // sh './mvnw clean install'
+                sh 'echo "Insert build commands here"'
+            }
+        }
+
+        stage('Test') {
+            steps {
+                echo 'Testing...'
+                // sh 'npm test'
+                sh 'echo "Insert test commands here"'
+            }
+        }
+
+        stage('Deploy') {
+            steps {
+                echo 'Deploying...'
+                // sh './deploy.sh'
+                sh 'echo "Insert deployment commands here"'
+            }
+        }
+    }
+
+    post {
+        always {
+            echo 'Pipeline finished. Cleaning up...'
+        }
+        success {
+            echo 'Build Succeeded!'
+        }
+        failure {
+            echo 'Build Failed! Check logs.'
+        }
+    }
+}
+```
+
+### Step 3: Configure Jenkins
+1. Open your Jenkins Dashboard.
+2. Click **New Item**, enter a name, and select **Pipeline**.
+3. Under the **Pipeline** section, set **Definition** to "Pipeline script from SCM".
+4. Select **Git** and provide your repository URL and credentials.
+5. Ensure the **Script Path** is set to `Jenkinsfile`.
+6. Click **Save** and then **Build Now**.
+
+## 3. Best Practices for Your Project
+
+1. **Keep it in Git:** Always store your `Jenkinsfile` in your repository. This allows versioning and easy recovery.
+2. **Fail Fast:** Put unit tests and linting in the earliest stages. If they fail, the pipeline stops immediately, saving time.
+3. **Use Credentials:** Never hardcode passwords or API keys. Use Jenkins' **Credentials Provider** and access them via the `credentials()` helper in your script.
+4. **Isolated Environments:** Use **Docker** agents to ensure your build environment is consistent and doesn't conflict with other projects.
+5. **Stages are Logical:** Use stages to group related steps. This makes the Jenkins UI much easier to read and debug.

devop_note/video/Learn Jenkins - Complete Jenkins Course.md

@@ -0,0 +1,47 @@
+---
+title: "Learn Jenkins! Complete Jenkins Course - Zero to Hero"
+url: "https://www.youtube.com/watch?v=6YZvp2GwT0A"
+tags:
+  - jenkins
+  - cicd
+  - devops
+  - automation
+  - docker
+  - summary
+created: 2026-06-03
+---
+
+# Learn Jenkins! Complete Jenkins Course - Zero to Hero
+
+This video is a comprehensive one-hour masterclass designed to take viewers from a basic understanding of Jenkins to a proficient level. It covers the fundamental concepts of CI/CD, infrastructure setup, and the practical implementation of automation pipelines.
+
+## 1. Introduction to Jenkins and CI/CD Concepts
+- **What is Jenkins?** Jenkins is an open-source automation server used to reliably build, test, and deploy software.
+- **Role in DevOps:** The video emphasizes Jenkins' dominance in the CI/CD space despite newer alternatives, highlighting its extensive plugin ecosystem and flexibility.
+
+## 2. Jenkins Infrastructure: Master and Agents
+- **Architecture:** Explains the "Controller (Master) and Agent" model. The Controller manages the GUI, scheduling, and configuration, while Agents (Nodes) perform the actual heavy lifting of running builds.
+- **Agent Types:** Discusses permanent agents versus cloud-based/dynamic agents (like Docker containers) that spin up on demand to save resources.
+
+## 3. Installation and Setup
+- **Docker-Based Setup:** Focuses on installing Jenkins using Docker to simplify environment management. Covers creating a custom Dockerfile with tools like Jenkins Plugin CLI and BlueOcean.
+- **Web GUI Walkthrough:** A guided tour of the Jenkins dashboard, including plugin management, system settings, and build history.
+
+## 4. Freestyle Jobs vs. Pipelines
+- **Freestyle Jobs:** Demonstrates simple, UI-based automation tasks like running shell commands and Python scripts.
+- **Pipelines:** Introduces the "Pipeline as Code" concept, the modern standard for Jenkins.
+
+## 5. Advanced Automation and Pipelines
+- **Declarative Pipelines (Groovy):** Instruction on writing Groovy-based scripts to define complex workflows.
+- **Jenkinsfile:** Explains storing pipeline definitions in a `Jenkinsfile` within source control (like GitHub) for version-controlled CI/CD.
+- **Triggers:** Shows how to configure automated builds via Webhooks or Polling.
+
+## 6. Docker Integration and BlueOcean
+- **Docker Cloud Agents:** Shows how to configure Jenkins to provision Docker containers as build agents for isolated environments.
+- **BlueOcean:** Introduces the BlueOcean plugin for a modern, visual UI to design and diagnose Jenkins Pipelines.
+
+## Key Topics Covered
+- **Infrastructure:** Master/Agent architecture and Label-based job restriction.
+- **Job Types:** Freestyle builds vs. Groovy-based Declarative Pipelines.
+- **Environment:** Docker integration for Jenkins and its build agents.
+- **Best Practices:** Using Jenkinsfiles and setting up automated triggers.