Can you explain the concept of Worker in GitLab and how it works?

In GitLab, a Worker is a component that performs CI/CD tasks assigned to it.

When you run a pipeline, GitLab creates jobs that are queued. The Worker takes these jobs from the queue and executes them on a dedicated executor (runner).

The Worker’s work includes:

• Receiving a job from the queue.
• Running scripts and commands described in .gitlab-ci.yml.
• Sending the execution results back to GitLab.

Thus, the Worker provides distributed and parallel execution of tasks, enabling the scaling of the build, testing, and deployment process.