Harpoon.io Reveals 6 Things Beginners Should Know About Kubernetes

Technology has significantly changed our lives. With it, communicating with people on the other side of the world, accessing information, sending and receiving news, working and collaborating, and more have become faster and more convenient.

In the Information Technology (IT) industry, one of the most important and ground-breaking innovations in recent years is Kubernetes. If you work in the IT sector, you will have likely encountered the term a lot and may be interested in learning more about it. Especially with all the buzz it has made, there is probably a good reason why it has been getting so much attention.

Below is some basic information about Kubernetes for beginners:

What is Kubernetes?

Kubernetes, also sometimes shortened to K8s, is a type of container orchestration framework. It is an open-source system used for the deployment, scaling, and management of containerized applications. It is designed with built-in commands that deploy, roll out, scale down, and scale up your applications according to your needs. It also monitors your applications and allows for the automation of container management operational tasks, making application management simpler.

Originally developed by Google and released in 2014, it is valuable in the effective management of containerized applications found in a clustered environment. Its primary goal is to improve how components and services are managed and distributed across different infrastructures.

What are its uses?

The increase in the use of microservices is the driving force behind the rise of Kubernetes. With Kubernetes, containers can play the part of perfect hosts for microservices because of their independence, greater dependency management, and OS agnosticism.

When creating applications, Kubernetes has made managing and deploying them anywhere a lot easier. It also offers varied solutions to meet the specific needs of its users. Below are examples of how it is commonly used:

Deployment of applications anywhere – By adopting Kubernetes, you can run your applications anywhere. Whether on public clouds, using on-site deployment, or across hybrid deployment, you can rely on Kubernetes to do its job as it is designed to be used anywhere.

Faster app development – Kubernetes supports the building of microservices and cloud-native applications. It also helps in the containerization of any existing apps. With these capabilities, it promotes application modernization, increasing the rate at which apps are developed.

Improved service efficiency – Depending on how big or small the cluster size that is necessary to run a service is, Kubernetes can make automatic adjustments. Thanks to automated Kubernetes, you can scale your applications accordingly and get them to run in a more efficient manner.

What are its benefits?

People who work in IT and have gotten to know Kubernetes can say that the fame it has gained in a short amount of time is well-deserved. With the Kubernetes system, they have enjoyed some pretty good benefits, such as:

Automation – With automated Kubernetes, managing applications can become easier. Thanks to its built-in commands, it can handle all the tasks and processes involved in application management.

Availability – Disruptions are a pain to deal with. Fortunately, Kubernetes has high availability, meaning it is constantly and consistently up and running. Whether there is an unexpected event, such as a pod crash, or a new update to run and execute, it is working non-stop.

Monitoring – Because it is always up and running, Kubernetes can do regular health checks to determine if your containers have failed or any of your services have stalled and need restarting. It ensures that services are only made available to users after it has verified that they are running smoothly.

Scalability – Depending on the requirements of a particular application, Kubernetes lets you make the necessary adjustments. It can be scaled down if you only have a single user or scaled up if you have several hundreds or thousands involved. That way, it ensures that your application is performing at a high level for everyone at all times.

Disaster recovery - Infrastructure problems can occur at any time, and can cause delays and disruptions. With the help of Kubernetes, you can stop worrying about losing important data. It is built to always have the most recent data, states, and conditions of your application, so you can get back on your feet right away.

What are the elements found in a simple Kubernetes setup?

In a simple Kubernetes setup, you can find one master node and two worker nodes.

The master node is in charge of the cluster, so it decides the state of the cluster and assigns roles and duties to each worker node. To set it up, it has to run four processes – API server, scheduler, controller manager, and etcd.

On the other hand, worker nodes, also sometimes referred to as slave nodes, require three node processes for them to be able to interact with Kubernetes. Each of the two worker nodes has to run kubelet, container runtime, and Kube proxy.

What are the most common components used for its deployment?

To deploy Kubernetes, there are some key components needed. These include the following:

The smallest unit of Kubernetes is called the pod. It is where an instance of an application is housed. It gets a unique IP address upon creation.Service gives pods their permanent IP addresses. It makes sure that the IP address of a pod does not change if it dies and gets recreated.Ingress opens HTTP routes and HTTPS routes found outside of the cluster to the services found within the cluster. Essentially, it dictates the routing traffic rules, determining the Service that any incoming request should take to be within the cluster.The actual implementation or execution of Ingress is called ingress controller. It is responsible for load balancing traffic originating from the outside of the platform and pouring into the inside.ConfigMap refers to a configuration file that users can access and modify.For passwords and other sensitive and top-secret information, there is a specific configuration file for that particular purpose. It is called Secret.Volumes works similarly to an external hard drive and are useful for persistent data storage. They can be local, such as on the node that runs your pods, or remotely, such as via cloud storage.Deployments are crucial in defining a blueprint for pods. They usually have replicas so that a backup always exists in the event that a component of an application dies.

 

What is Kubernetes deployment automation?

When we talk about Kubernetes deployment automation, it refers to the uninterrupted and disruption-free release and deployment processes involved in building applications. If you automate Kubernetes deployment, you can eliminate human intervention within your continuous integration and continuous delivery (CI/CD) processes. You can release new features and applications quickly and without delay. Making adjustments to the replica sets, managing transitions from one application version to the next, mounting your choice of storage system, and other tasks can occur automatically if you automate Kubernetes deployment. As one of the best and most powerful features that the Kubernetes system has, you can rely on Kubernetes automation to provide the correct solutions for a successful delivery cycle.

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