企業指南：如何大規模由 Jenkins 遷移至 GitHub Actions

By The Cognition Team08.05.25

🔍 Key Takeaways

• Jenkins pipelines are deeply ingrained in enterprise workflows but increasingly outdated.
• GitHub Actions offers scalable, cloud-native CI/CD tightly integrated into the GitHub ecosystem.
• Migrating thousands of Jenkins pipelines is time-intensive — but now automatable.
• Generative AI agents like Devin can read internal docs and reliably convert pipelines at scale.
• Enterprises can cut multi-year migration efforts down to a few months.

🏁 Why Migrate: Jenkins vs. GitHub Actions

Jenkins was designed for a pre-container, on-prem world. While extensible, it now struggles with scale, cloud integration, and modern SDLC practices.

In contrast, GitHub Actions, released in 2019, is a SaaS-native CI/CD system that’s integrated directly into GitHub — making it easier to manage workflows and infrastructure as code.

Here’s a quick comparison:

⚠️ Common Challenges in Migrating Jenkins Pipelines

Many large organizations want to move to GitHub Actions but hit roadblocks, including:

• Thousands of Jenkinsfiles across legacy repositories
• Tight coupling to Jenkins plugins or Groovy scripts
• Unclear documentation or tribal knowledge of how jobs work
• Differences in environment setup between Jenkins agents and GitHub runners
• Manual rebuild effort is slow — ~30 minutes per pipeline

🎯 Example: Jenkins to GitHub Actions Pipeline Conversion

A Jenkins pipeline with Slack notifications might look like this:

Jenkinsfile

pipeline {
  agent any
  environment {
    SLACK_CHANNEL = '#ci'
  }
  stages {
    stage('Checkout') {
      steps {
        checkout scm
      }
    }
    stage('Build') {
      steps {
        echo 'Building the project...'
      }
    }
    stage('Test') {
      steps {
        echo 'Running tests...'
      }
    }
  }
  post {
    success {
      slackSend(
        channel: "${env.SLACK_CHANNEL}",
        message: "✅ Jenkins build succeeded: ${env.JOB_NAME} #${env.BUILD_NUMBER}"
      )
    }
    failure {
      slackSend(
        channel: "${env.SLACK_CHANNEL}",
        message: "❌ Jenkins build failed: ${env.JOB_NAME} #${env.BUILD_NUMBER}"
      )
    }
  }
}

GitHub Actions Equivalent

name: CI Pipeline

on: [push]

jobs:
  build:
    runs-on: ubuntu-latest

    steps:
      - name: Checkout
        uses: actions/checkout@v4

      - name: Build
        run: echo "Building the project..."

      - name: Test
        run: echo "Running tests..."

      - name: Notify Slack (Success)
        if: success()
        uses: your-org/slack-notifier-action@v1
        with:
          webhook_url: ${{ secrets.SLACK_WEBHOOK }}
          message: "✅ GitHub build succeeded on `${{ github.ref }}` (#${{ github.run_number }}) by ${{ github.actor }}"

      - name: Notify Slack (Failure)
        if: failure()
        uses: your-org/slack-notifier-action@v1
        with:
          webhook_url: ${{ secrets.SLACK_WEBHOOK }}
          message: "❌ GitHub build failed on `${{ github.ref }}` (#${{ github.run_number }}) by ${{ github.actor }}"

While this is manageable for one repository, multiplying this effort across 10,000+ repos becomes a daunting manual project.

🤖 Accelerating Migration with AI Agents like Devin

Tools like Devin are changing the landscape of CI/CD modernization. Devin is a generative AI agent that runs inside your secure environment, and can:

• Read internal documentation and Jenkinsfile variations
• Convert pipelines to GitHub Actions syntax
• Replace custom Jenkins plugins with Actions or APIs
• Test and validate the converted workflows

This allows organizations to automate what was previously a slow, hands-on migration. A project once scoped for years can now be completed in months.

🛡️ Secure, Context-Aware DevOps Automation

Devin operates within your internal network, ensuring no data or code leaves your infrastructure. Key advantages include:

• Full access to internal tools (e.g., Confluence, internal GitHub/GitLab)
• No exposure of secrets to external SaaS tools
• Secure integration with enterprise IAM and policies

📈 DevOps, Transformed

Generative AI is redefining DevOps delivery — enabling teams to:

• Unlock automation across stale or legacy infrastructure
• Migrate CI/CD workflows at a fraction of the cost and time
• Drive faster innovation by offloading repetitive build/config work

By moving from Jenkins to GitHub Actions with the help of AI, teams gain flexibility, speed, and modern scalability — all without rewriting pipelines from scratch.

💡 Want to learn more?

If you’re managing a Jenkins-to-GitHub migration at scale, contact us to see how Devin can accelerate the journey.