DevOps Developer with CI/CD Salary in 2024

Where is CI/CD used?

CI/CD: The DevOps Superhero

Automated Bug Extermination

• Like a stealthy ninja, CI/CD sneaks in to squash code bugs automatically, preventing them from spawning like pesky roaches in production code.

Feature Factory Fast-Track

• CI/CD is the express train for new features, zipping them from concept to customer faster than you can say "deployment". Choo choo!

The Great Wall of Updates

• In the realm of software, CI/CD stands guard like an impassable fortress, ensuring only the worthiest updates breach its walls to reach the user kingdom.

Breaking Bad (Code) Habits

• Like a strict fitness trainer for developers, CI/CD keeps coders in top shape, making sure they don’t get away with lazy commit-push-run cycles.

CI/CD Alternatives

Serverless Architecture

Definition: Deploying code without managing the underlying infrastructure.
Examples: AWS Lambda, Google Cloud Functions, Azure Functions
Tasks: Automates the deployment process by abstracting the server layer.

// AWS Lambda Node.js example
exports.handler = async (event) => {
    const response = {
        statusCode: 200,
        body: JSON.stringify('Hello from Lambda!'),
    };
    return response;
};

• Pros: Scale automatically, Pay-per-use pricing, No server management


• Cons: Cold starts can affect performance, Testing complexity, Vendor lock-in risks

Feature Flagging

Definition: Enables toggling features without deploying new code.
Examples: LaunchDarkly, Split.io
Tasks: Control rollout of features for testing and gradual release.

// LaunchDarkly feature flag example in Java
LDClient client = new LDClient("YOUR_SDK_KEY");
boolean showFeature = client.boolVariation("your.flag.key", user, false);
if (showFeature) {
    // Show the feature to the user
}
client.close();

• Pros: Fine-grained control over features, Facilitates A/B testing, Quick rollback of features


• Cons: Managing flags can get complex, Overhead of additional service, Can mask code issues

Monolithic Repository (MonoRepo)

Definition: Store all code in a single version-controlled repository.
Examples: Google’s Piper, Facebook’s Mercurial
Tasks: Simplifies dependency management and streamlines code sharing.

// No specific code sample, as MonoRepo is a strategy rather than a tool.

• Pros: Simplified dependency management, Improved code visibility, Atomic commits across projects


• Cons: Steeper learning curve, Scalability challenges, Potential for merge conflicts

Quick Facts about CI/CD

Continuous Integration Dances Into Town

Imagine a world where coders were like solo artists, crooning in their cubicles, never really syncing up. That was development before 1991, when the whole "Continuous Integration" (CI) jig kick-started. Thanks to Grady Booch who first waltzed in with the term. He wasn't inventing salsa, no, he was preaching the gospel of merging code often to avoid the integration headache a.k.a the "Integration Hell." It was less "Nightmare on Elm Street" and more "A Midsummer Night's Merge."

CI/CD Software: From Snail Mail to Instant Messaging

Jump to the '00s, and there's a software speed dating scene -- CI servers like Jez Humble's Jenkins (born Hudson in 2004, but had some identity issues so it rebranded in 2011) strutted onto the floor. Jenkins was like that one friend who ensures you don't text your ex; it keeps developers from re-breaking the build, by automating testing and reporting back in real-time. It’s "look, but don't touch" – but with code commits.

Scripted Pipelines: When Code Does Ballet

  pipeline {
    agent any
    stages {
      stage('Build') {
        steps {
          echo 'Building..'
          // Imagine tiny ballerinas pirouetting here
        }
      }
      stage('Test') {
        steps {
          echo 'Testing..'
          // Code in tutus, doing jetes
        }
      }
      stage('Deploy') {
        steps {
          echo 'Deploying..'
          // And now, a code grand finale
        }
      }
    }
  }

Fancy a dance of the scripts? Jenkinsfile brought the concept of "Scripted Pipelines" into the limelight around 2016. It's where the code plays choreographer, outlining the steps in the CI/CD waltz so precisely that deviation isn’t an option. And watching your builds execute stage by stage? That's the modern-day ballet. No tights necessary.

What is the difference between Junior, Middle, Senior and Expert CI/CD developer?

Top 10 CI/CD Related Tech

1. 
   

   Version Control Systems: Git

   
   

   
   Imagine a digital time machine for your code, that's Git! It's the bedrock of modern software development, letting developers travel back to happier times before they introduced that apocalypse-causing bug. It’s crucial for branching, merging, and not losing your mind when collaborating with a merry band of coding comrades.
   

   
   # Initialize a new Git repository
   git init
   
   # Add a file to the staging area
   git add .
   
   # Commit your changes
   git commit -m "Initial commit"
   

   
   
   
   



2. 
   

   Continuous Integration Servers: Jenkins

   
   

   
   Jenkins, the butler of software development, is always ready to take your coat and integrate your code. It's an automation server that can build, test, and deploy your precious codebase. Jenkins is like that overly eager friend who insists on doing every group project in school. Oh, and it has more plugins than a rock band's equipment room.
   

   
   # Create a new Jenkins job
   jenkins-cli create-job my-new-job < config.xml
   
   # Build a Jenkins job
   jenkins-cli build my-new-job
   

   
   
   
   



3. 
   

   Containerization: Docker

   
   

   
   Docker is like those Russian nesting dolls, but for apps and their environments. It packs everything your app needs into a neat container that can be moved around like a chess piece. With Docker, 'But it works on my machine' excuses are shoved firmly into the bin of history.
   

   
   # Pull an image from Docker Hub
   docker pull nginx
   
   # Run a Docker container
   docker run -d -p 80:80 --name webserver nginx
   

   
   
   
   



4. 
   

   Continuous Deployment: Kubernetes

   
   

   
   Kubernetes, or K8s for short (because counting eight characters is hard), is the godzilla of container orchestration. It makes sure all your containerized apps play nicely together on a cluster. Kubernetes is like a hyper-organized party planner for containers, keeping the champagne (your apps) flowing smoothly.
   

   
   # Create a Deployment
   kubectl create deployment hello-world --image=gcr.io/google-samples/hello-app:1.0
   
   # Expose your Deployment as a Service
   kubectl expose deployment hello-world --type=LoadBalancer --port 80
   

   
   
   
   



5. 
   

   Infrastructure as Code: Terraform

   
   

   
   Need to spawn an army of servers with a flick of your fingers? Terraform's your wizard's wand! Declare all your infrastructure as code and watch Terraform conjure clouds with the ease of a maestro. It's like playing a strategy game, but instead of training in-game units, you're amassing actual servers.
   

   
   # Define your infrastructure as code
   resource "aws_instance" "web" {
       ami = "ami-0c55b159cbfafe1f0"
       instance_type = "t2.micro"
   }
   
   # Apply the configuration
   terraform apply
   

   
   
   
   



6. 
   

   Configuration Management: Ansible

   
   

   
   Ansible is the digital equivalent of remotely whispering sweet nothings into your servers' ears to configure them just the way you like. It's super simple to use, and with it, you can avoid getting up close and personal with every machine. Think of it as telepathically telling your infrastructure what to do.
   

   
   # Define a task using Ansible
   - name: Ensure nginx is at the latest version
     ansible.builtin.yum:
       name: nginx
       state: latest
   

   
   
   
   



7. 
   

   Monitoring and Logging: Prometheus and Grafana

   
   

   
   If you ever wanted superpowers to see into the health of your systems, meet Prometheus and Grafana. They’re like the dynamic duo of monitoring, one scraping metrics faster than a desperate dieter and the other making dashboards more beautiful than a unicorn in a field of rainbows. Together, they’ll give you the vision of an eagle on every aspect of your system.
   

   
   # Example Prometheus target configuration
   - job_name: 'my-app'
     static_configs:
       - targets: ['localhost:9090']
   
   # Example Grafana visualization setup
   # Dashboard creation is more of a UI-driven process!
   

   
   
   
   



8. 
   

   Scripting Languages: Bash/Python

   
   

   
   For when you need to hack together a quick solution or automate a mundane task, scripting languages like Bash and Python have your back. Bash is the granddaddy of command-line magic in Unix-like environments, and Python is like the Swiss Army knife of programming - both are must-haves for any automation shenanigans.
   

   
   # Bash script to print "Hello, World!"
   echo "Hello, World!"
   
   # Python script to print "Hello, World!"
   print("Hello, World!")
   

   
   
   
   



9. 
   

   Binary Repositories: Artifactory/Nexus

   
   

   
   Think of these as the grand libraries of Alexandria, but for your code artifacts. They keep your precious binaries safe and sound, indexed like a librarian on a power trip. Artifactory and Nexus are the burly bouncers at the club, ensuring only the VIPs (verified packages) get through.
   

   
   # Uploading an artifact to Artifactory
   curl -H "X-JFrog-Art-Api:API_KEY" -T path/to/file.zip "http://yourdomain.com/artifactory/your-repository/file.zip"
   
   # Downloading an artifact from Nexus
   wget --http-user=admin --http-password=admin123 --output-document=file.zip http://localhost:8081/repository/your-repository/file.zip
   

   
   
   
   



10. 
    

    Code Quality & Review Tools: SonarQube

    
    

    
    SonarQube is like the judgy in-law of the coding world, it'll scrutinize your code in ways you never thought possible. But instead of awkward family dinners, you get a ton of insight into the health of your precious codebase, with all the metrics on bugs, vulnerabilities, and style issues you could wish for.
    

    
    # Example to run SonarQube analysis
    mvn sonar:sonar \
      -Dsonar.projectKey=my_project_key \
      -Dsonar.host.url=http://localhost:9000 \
      -Dsonar.login=my_token