Rippling DevOps Engineer Coding Questions

Rippling manages multiple microservices in containers. An optimized Dockerfile decreases image size and improves build times.
Problem Statement: Revise an existing Dockerfile to ensure it follows best practices in minimizing layers and reducing the image size. Your Dockerfile should utilize multi-stage builds where applicable.
Example 1:
Input: Existing Dockerfile specifying base image node:14 with unnecessary layers.
Output: Streamlined Dockerfile with multi-stage build implementation.
Explanation: The revised Dockerfile should build the final image with only necessary runtime dependencies and exclude build-time dependencies.
Constraints:
- Final image size must not exceed 200MB.
- Must support production and development environments.

Rippling deploys new features frequently, and an efficient CI script ensures that code changes are pushed seamlessly. The goal is to minimize build times while maintaining reliability.
Problem Statement: You are tasked to write a CI script in Python that automates the build and test cycle for a microservice-based application. The script should:
- Check out code from a Git repository.
- Run unit tests and integration tests.
- Deploy the service if all tests pass.
- Send notifications for failed deployments.
Example 1:
Input: Repository URL: https://github.com/example/repo, Branch: main
Output: Success message if deployment succeeds
Explanation: The script checks out the specified branch, runs the tests, and then proceeds with the deployment if tests pass.
Constraints:
- Maximum build time: 300 seconds
- Repository size should not exceed 1GB.
- Must handle at least 50 concurrent builds.