Docker & Kubernetes Commands: Essential Guide for Microservices Development

🐳🚀 Docker and ☸️ Kubernetes have emerged as crucial technologies in the realm of microservices development, revolutionizing the way modern applications are built, deployed, and managed. 💡 Docker, with its lightweight containerization approach, enables developers to package applications and their dependencies into portable and self-contained units 📦. These containers provide consistency across different environments, ensuring that applications run reliably regardless of the underlying infrastructure. 🌍 Kubernetes, the container orchestration platform, takes microservices deployment to the next level by providing automated management, load balancing, and fault tolerance 🔄⚖️.

Together, 🐳 Docker and ☸️ Kubernetes empower developers to embrace the microservices architecture, enabling modular, scalable, and resilient applications that can be easily deployed and managed in dynamic and distributed environments 🏗️💪. By leveraging these technologies, organizations can achieve faster development cycles ⚡, improved scalability 🔝, and enhanced operational efficiency 👨 💻🔧, thereby unlocking the full potential of microservices development. 🚀🌟

Here is a comprehensive list of essential commands that you’ll use on a daily basis when working with containers and Kubernetes. As a backend developer engaged in Microservices development, it’s crucial to keep these commands readily available for your workflow.

1. Image Management:

  – `docker images`: List all available Docker images.

  – `docker pull <image_name>`: Pull an image from a registry.

  – `docker push <image_name>`: Push an image to a registry.

  – `docker build -t <image_name> .`: Build an image from a Dockerfile.

2. Container Management:

  – `docker run <image_name>`: Create and start a new container from an image.

  – `docker start <container_id>`: Start a stopped container.

  – `docker stop <container_id>`: Stop a running container.

  – `docker restart <container_id>`: Restart a container.

  – `docker pause <container_id>`: Pause a running container.

  – `docker unpause <container_id>`: Unpause a paused container.

  – `docker rm <container_id>`: Remove one or more containers.

  – `docker ps`: List running containers.

  – `docker ps -a`: List all containers (including stopped ones).

  – `docker exec <container_id> <command>`: Run a command inside a running container.

  – `docker logs <container_id>`: View the logs of a container.

  – `docker inspect <container_id>`: Display detailed information about a container.

  – `docker rename <container_id> <new_name>`: Rename a container.

  – `docker wait <container_id>`: Block until a container stops, then print the exit code.

3. Network Management:

  – `docker network ls`: List Docker networks.

  – `docker network create <network_name>`: Create a new Docker network.

  – `docker network connect <network_name> <container_id>`: Connect a container to a network.

  – `docker network disconnect <network_name> <container_id>`: Disconnect a container from a network.

4. Volume Management:

  – `docker volume ls`: List Docker volumes.

  – `docker volume create <volume_name>`: Create a new Docker volume.

  – `docker volume inspect <volume_name>`: Display detailed information about a volume.

  – `docker volume rm <volume_name>`: Remove one or more volumes.

5. Docker Compose:

  – `docker-compose up`: Create and start containers defined in a Compose file.

  – `docker-compose down`: Stop and remove containers, networks, and volumes created by Docker Compose.

  – `docker-compose build`: Build or rebuild services defined in a Compose file.

  – `docker-compose logs`: View output from containers managed by Docker Compose.

  – `docker-compose pull`: Pull images for services defined in a Compose file.

6. Docker Swarm (for orchestration):

  – `docker swarm init`: Initialize a swarm.

  – `docker swarm join`: Join a swarm as a worker node.

  – `docker service create`: Create a new service.

  – `docker service ls`: List services.

  – `docker service scale`: Scale a service.

  – `docker service update`: Update a service.

Now, let’s expand this article by incorporating the crucial aspect of orchestration. Here is a compilation of essential commands that one should be familiar with when it comes to container orchestration.

1. Cluster Management:

  – `kubectl cluster-info`: Display information about the Kubernetes cluster.

  – `kubectl get nodes`: List all nodes in the cluster.

  – `kubectl describe node <node_name>`: Get detailed information about a specific node.

  – `kubectl get pods`: List all pods in the cluster.

  – `kubectl describe pod <pod_name>`: Get detailed information about a specific pod.

2. Namespace Management:

  – `kubectl get namespaces`: List all namespaces.

  – `kubectl create namespace <namespace_name>`: Create a new namespace.

  – `kubectl delete namespace <namespace_name>`: Delete a namespace and all resources within it.

3. Deployment Management:

  – `kubectl get deployments`: List all deployments.

  – `kubectl create deployment <deployment_name> –image=<image_name>`: Create a new deployment.

  – `kubectl scale deployment <deployment_name> –replicas=<replica_count>`: Scale a deployment.

  – `kubectl rollout status deployment <deployment_name>`: Get the status of a deployment rollout.

  – `kubectl rollout history deployment <deployment_name>`: View the revision history of a deployment.

4. Pod Management:

  – `kubectl get pods`: List all pods.

  – `kubectl create -f <pod_configuration.yaml>`: Create a pod from a YAML configuration file.

  – `kubectl delete pod <pod_name>`: Delete a pod.

  – `kubectl logs <pod_name>`: Print the logs of a pod.

  – `kubectl exec -it <pod_name> — <command>`: Run a command inside a pod.

5. Service Management:

  – `kubectl get services`: List all services.

  – `kubectl create service <service_type> <service_name> –tcp=<port>:<target_port>`: Create a new service.

  – `kubectl delete service <service_name>`: Delete a service.

  – `kubectl describe service <service_name>`: Get detailed information about a service.

6. ConfigMap Management:

  – `kubectl create configmap <configmap_name> –from-literal=<key>=<value>`: Create a new ConfigMap.

  – `kubectl get configmaps`: List all ConfigMaps.

  – `kubectl describe configmap <configmap_name>`: Get detailed information about a ConfigMap.

  – `kubectl delete configmap <configmap_name>`: Delete a ConfigMap.

7. Secret Management:

  – `kubectl create secret generic <secret_name> –from-literal=<key>=<value>`: Create a new secret.

  – `kubectl get secrets`: List all secrets.

  – `kubectl describe secret <secret_name>`: Get detailed information about a secret.

  – `kubectl delete secret <secret_name>`: Delete a secret.

8. Ingress Management:

  – `kubectl get ingress`: List all ingresses.

  – `kubectl create ingress <ingress_name> –rule=<host>/<path>=<service_name>:<service_port>`: Create a new ingress.

  – `kubectl delete ingress <ingress_name>`: Delete an ingress.

  – `kubectl describe ingress <ingress_name>`: Get detailed information about an ingress.

9. Volume Management:

  – `kubectl get persistentvolumes`: List all persistent volumes (PVs).

  – `kubectl get persistentvolumeclaims`: List all persistent volume claims (PVCs).

  – `kubectl describe persistentvolume <pv_name>`: Get detailed information about a persistent volume.

  – `kubectl describe persistentvolumeclaim <pvc_name>`: Get detailed information about a persistent volume claim.

10. StatefulSet Management:

  – `kubectl get statefulsets`: List all stateful sets.

  – `kubectl create -f <statefulset_configuration.yaml>`: Create a stateful set from a YAML configuration file.

  – `kubectl scale statefulset <statefulset_name> –replicas=<replica_count>`: Scale a stateful set.

In conclusion, understanding 🐳 Docker and ☸️ Kubernetes is crucial in the world of microservices development. These technologies empower developers to build, deploy, and manage scalable and resilient applications with ease. With Docker’s containerization and Kubernetes’ orchestration capabilities, the process of developing and maintaining microservices becomes more efficient and streamlined.

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Thanks for joining me.

Happy Coding

Also published on Medium.

Thanks, Rahul Happy Coding