Mastering the Basics of CI/CD with GitLab: A Step-by-Step Guid

Step 1: Create a Project on GitLab

Log in to your GitLab account.

On the GitLab main interface, you'll find a New Project button or a "+" icon in the top-right corner. Click on it to create a new project.

Step 2: Create the .gitlab-ci.yml File

After creating the project, access the project's page.

In the left-hand menu, choose "Repository to open the source code management tab.

Click on the New file button to create a new file and name it .gitlab-ci.yml.

Step 3: Configure .gitlab-ci.yml for a Basic CI/CD Workflow

Here's an example of a .gitlab-ci.yml file with specific steps for a CI/CD workflow:

  - build
  - test
  - deploy

  stage: build
    - echo "Building the application..."
    # Add steps to build the application, e.g., compile, build artifacts, etc.

  stage: test
    - echo "Running tests..."
    # Add steps to run automated tests, e.g., unit tests, integration tests, etc.

  stage: deploy
    - echo "Deploying the application..."
    # Add steps to deploy the application, e.g., deploy to staging/production servers.

# Configuration to deploy only on changes to the master branch
    - master

Step 4: Trigger CI/CD on GitLab

When you push code to the repository on GitLab (e.g., add, modify, or delete code files), GitLab will automatically initiate the CI/CD process based on the .gitlab-ci.yml file.

Each stage (build, test, deploy) will run sequentially, performing the defined jobs.

Step 5: View CI/CD Results

In the project's GitLab page, select the "CI/CD" tab to view all the executed CI/CD jobs.

You can see the run history, timings, outcomes, and in case of errors, error notifications will be displayed here.

Note: This is a simple example. In reality, CI/CD workflows can be more complex and involve multiple steps like security checks, performance testing, integration testing, and more. You'll need to delve deeper into configuring and customizing GitLab CI/CD for your project's needs.