Part 2: Diving Into Kubernetes
What is Kubernetes?
Kubernetes, often referred to as K8s, is an open-source container orchestration platform. It was initially developed by Google and has become the de facto standard for managing containerized applications at scale. Kubernetes automates many of the tasks associated with running applications, such as deployment, scaling, and maintenance, allowing developers to focus on writing code rather than managing infrastructure.
Key Features of Kubernetes
- Automated Scaling: Kubernetes can automatically adjust the number of running containers based on the current load. This ensures that applications can handle increased demand without manual intervention.
- Load Balancing: Kubernetes includes built-in load balancing, which distributes network traffic evenly across multiple containers. This prevents any single instance from becoming a bottleneck and helps ensure a smooth user experience.
- Self-Healing: Kubernetes continuously monitors the health of your containers and will automatically restart or replace any containers that fail or become unresponsive. This helps maintain high availability for your applications.
Getting Started with Kubernetes
Once you have your Docker images ready, you can deploy them on a Kubernetes cluster. Here’s how to get started using kubectl, the command-line tool for Kubernetes:
- Create a Deployment:
kubectl create deployment my-app --image=my-docker-image
- Expose the Deployment:
kubectl expose deployment my-app --type=LoadBalancer --port=8080
These commands will create a deployment called my-app, running the specified Docker image, and expose it to external traffic on port 8080.
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