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Kubernetes Project Example

This project includes two microservices: echo-service and gateway-service, which demonstrate a simple backend and a gateway pattern within a Kubernetes environment.

Important Kubernetes Commands

  • Get specific resources in all namespaces:

    kubectl get deployments,services,configmaps,secrets,ingresses

  • Get all resources in a specific namespace:

    kubectl get all --namespace echo-namespace

  • Apply a configuration to a resource by filename:

    kubectl apply -f <filename>

  • Delete a resource by filename:

    kubectl delete -f <filename>

  • Restart a deployment:

    kubectl rollout restart deployment <deployment-name>

Key Kubernetes Resources

  • Deployments (deployment.yaml): Manages the deployment of stateless applications. It keeps a set number of replicas of pods running and updates them in a controlled way.

  • Services (service.yaml): Provides a stable interface to pods, balancing traffic and enabling service discovery within the cluster.

  • ConfigMaps (configmap.yaml): Manages configuration data and variables for pods, allowing you to separate configuration from the application code.

  • Secrets (secret.yaml): Securely stores sensitive data, such as passwords or API keys, that you want to keep confidential.

  • Ingresses (not yet defined in this project): Manages external access to the services within the cluster, typically HTTP.

Project Structure

  • /services: Contains source code for the individual microservices.
  • /deployments: Contains all Kubernetes deployment YAML files.
  • /scripts: Contains utility scripts such as build.sh for building Docker images and deploy.sh for deploying services.

For detailed explanations and more commands, refer to the Kubernetes documentation.