Managing Containers with Kubernetes: A Step-by-Step Guide.
Tags: containers, kubernetes, containerization, product
Published: 2023-06-19 10:08:52

**Introduction**

In recent years Containerization has revolutionized how developers deploy and maintain apps. Applications can be packaged in containers, making them portable and easy to move between environments. Scaling up container management can be challenging, mainly dealing with many hosts and thousands of containers. Kubernetes enters the picture in this situation.

Managing containers using Kubernetes has become a crucial competency for DevOps teams in product engineering. The deployment, scaling, and maintenance of containerized applications are all automated via the open-source container orchestration technology known as Kubernetes.

A thorough manual that leads you through the Kubernetes container management process is “Managing Containers with Kubernetes: A Step-by-Step Guide.” It is simpler to deploy, scale, and maintain containerized apps thanks to the open-source technology Kubernetes, which automates container orchestration.

The manual offers a step-by-step procedure for using Kubernetes to manage containers, covering everything from setting up a cluster to deploying, scaling, and updating applications. Additionally, it discusses some of Kubernetes’s fundamental ideas and elements, including pods, services, deployments, and namespaces.The deployment, scaling, and administration of containers may all be automated using the open-source Kubernetes framework in software development. Automatic load balancing, scalability, and self-healing capabilities are some of its robust management features. The management of containers using Kubernetes will be covered step-by-step in this article.


![Image description](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/ikgxkdwh3wdqvph70eo3.jpg)

Step-1 Install Kubernetes 

Installing Kubernetes is the first step in managing containers with it. On various platforms, including on-premises, in the public cloud, and in the private cloud, Kubernetes can be installed. The installation procedure varies based on the forum, although each platform’s specific installation instructions are provided on the Kubernetes website.

Step- 2 Create A Kubernetes Cluster 

The next step is to construct a Kubernetes cluster after Kubernetes has been installed. A group of computers or nodes running containerized apps together forms a Kubernetes set. In the master-slave architecture used by Kubernetes, the controller node oversees the collection while the agent nodes execute the applications.

You must specify the cluster configuration, which includes the number of nodes, their roles, and their resources, to construct a Kubernetes cluster. A configuration file or graphical user interface can be used for this.

Step- 3 Deploy Applications 

With the Kubernetes cluster up and running, the next step is to deploy applications. Kubernetes uses a declarative approach to application deployment, which means that you define the desired state of the application, and Kubernetes takes care of the rest.

To deploy an application, you need to create a deployment object, which defines the application’s container image, resources, and desired replicas. Kubernetes will automatically start and manage the required containers and ensure they run correctly.

Step- 4 Scale Application 

The ability of Kubernetes to autonomously scale applications is one of its main advantages. Kubernetes can scale an application’s replica count based on CPU consumption and network traffic metrics.

It would help if you changed the replica count of the deployment object to scale an application. To match the specified replica count, Kubernetes automatically creates or deletes containers.

Step- 5 Manage Stateful Application

Applications that require permanent storage, like databases, are said to be stateful applications. Stateful sets, persistent volumes, and other management capabilities for stateful applications are offered by Kubernetes.

Although they are made for stateful applications, stateful sets are comparable to deployments. For stateful applications, they offer guarantees for the sequence and uniqueness of pod names.

Containers can get persistent storage with persistent volumes. Any pod in the cluster can use them, which can be generated dynamically or statically.

Step- 6 Monitor The Application 

Monitoring is crucial to guarantee the functionality and performance of apps running within a Kubernetes cluster. Applications can be monitored with a set of tools provided by Kubernetes, including internal metrics and third-party monitoring tools.

The health and performance of the cluster and its constituent parts are disclosed via the Kubernetes metrics, which are accessible via an API. Using the Prometheus operator, Kubernetes can be connected to external monitoring software.

Step- 7 Upgrade Application 

Finally, Kubernetes offers a method for upgrading apps without service interruption. By updating one replica at a time, Kubernetes uses a rolling update technique to ensure the application is always accessible.

You must change the container image of the deployment object to upgrade an application. The old containers will then progressively be replaced by new ones that Kubernetes has created using the revised image.


![Image description](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/d5eyh2bz5lk86vnpp5g1.jpg)

**Conclusion**

Anyone working with containerized apps must know how to manage containers with Kubernetes. A robust and adaptable platform for managing, scaling, and deploying containerized applications is offered by Kubernetes.

We have covered the fundamentals of Kubernetes in this step-by-step tutorial, including how to set up a cluster, make and manage containers, and scale applications. We have also looked into Kubernetes’ more sophisticated features, including configuring networking and storage and building stateful apps.

After reading this article, you should understand how to manage containers using Kubernetes. More to learn about Kubernetes, a sophisticated system with cutting-edge capabilities. To become a Kubernetes expert, we urge you to keep perusing the documentation for Kubernetes and experimenting with its various capabilities.