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Today, the editor will share with you what the basic knowledge points of the Kubernetes module are, the content is detailed, and the logic is clear. I believe most people still know too much about this knowledge, so share this article for your reference. I hope you can get something after reading this article.

1. Create a Kubernetes cluster

Kubernetes coordinates a cluster of highly available computers, each of which is connected to each other as independent units. The abstraction in Kubernetes allows you to deploy containerized applications to a cluster without binding them to a specific stand-alone computer. In order to use this new deployment model, applications need to be packaged in a way that separates applications from a single host: they need to be containerized. Compared with the deployment model in which the application is deeply integrated with the host directly in the way of package, containerized application is more flexible and available. Kubernetes automatically distributes and dispatches application containers across clusters in a more efficient way. Kubernetes is an open source platform and can be applied to production environments.

2. Deploy the application

Once the Kubernetes cluster is running, you can deploy containerized applications on it. To do this, you need to create a Kubernetes Deployment configuration. Deployment directs Kubernetes to create and update instances of the application. After the Deployment is created, Kubernetes master dispatches the application instance to each node in the cluster.

3. Exploration of application program

When creating Deployment, Kubernetes adds a Pod to host your application instance. Pod is abstracted from Kubernetes and represents a set of one or more application containers (such as Docker or rkt) and some shared resources of these containers. These resources include: shared storage as a volume, the network as a unique cluster IP address, and information about how each container runs, such as the container image version or the specific port to use.

4. The application is scalable.

In the previous module, we created a Deployment and then made it accessible through Service. Deployment only creates a Pod for running this application. When the traffic increases, we need to expand the application to meet the needs of users. Scaling is achieved by changing the number of replicas in Deployment.

5. Update the application

Users want applications to be available all the time, while developers need to deploy new versions of them several times a day. In Kubernetes, this is done through rolling updates (Rolling Updates). Rolling updates allow Pod instances to be updated step by step with new instances, with zero downtime for Deployment updates. The new Pod will be scheduled on nodes with available resources.

These are all the contents of this article entitled "what are the basic knowledge points of the Kubernetes module?" Thank you for reading! I believe you will gain a lot after reading this article. The editor will update different knowledge for you every day. If you want to learn more knowledge, please pay attention to the industry information channel.

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