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This article introduces the relevant knowledge of "what are the Kubernetes tools?". In the operation of actual cases, many people will encounter such a dilemma. Then let the editor lead you to learn how to deal with these situations. I hope you can read it carefully and be able to achieve something!

Helm

Helm helps you manage Kubernetes applications. Helm Charts helps you define, install, and upgrade the most complex Kubernetes applications. Helm can use Charts to start the Kubernetes cluster. Helm is the dominant king and the de facto standard for packaging, sharing, and deploying K8s applications. Helm is the package manager for Kubernetes, which allows you to group multiple YAML configurations into a logical package called "chart" in a consistent and structured manner.

For application publishers, creating a Helm Charts can bring you many benefits:

You can use templates or custom parameters to make the application configurable. You can publish applications to private or public repositories in a versioned and traceable manner. You can make your application dependent on other Helm chart and manage application dependencies in turn. Overall, Helm provides you with a powerful encapsulation mechanism to ensure that your application is deployed as expected.

For users, installing Helm chart can provide you with more benefits: you can access the public chart and any private chart repository provided by the organization. You can customize the application based on the settings provided by the application publisher. You can know the real version of the package. You don't have to worry about the complexity of the Kubernetes specification. Helm supports atomic upgrade or rollback operations, which can reduce the risk of your application and cluster. Overall, you will get an application package that is easy to understand and can be used immediately. What are the new features of Helm? At the end of 2019, we saw the release of Helm v3, which removed the cluster side component (Tiller) and many other features. By the end of 2020, Helm v2 was no longer recommended, and most public chart had been migrated to v3 format. If you are still using Helm v2, please arrange an upgrade as soon as possible.

In recent releases, the Helm team has been busy addressing the biggest complaint of Helm users-the difficulty of using YAML templates. Helm now includes a powerful Lint command that should be your new wizard when debugging YAML problems.

The Post Rendering feature is another new feature in Helm that allows you to customize Helm chart using tools such as Kustomize.

In 2020, chart management began to shift to decentralization, and launched two central repositories for sharing chart: CNCF's ArtifactHubJFrog's ChartCenter.

Kustomize

The biggest disadvantage of Helm is that application customization is limited to pre-existing configuration options. Not only that, chart creators must implement these custom options in some complex template way. Well, this is Kustomize's opportunity to use his talents.

Kustomize is a stand-alone tool for customizing Kubernetes objects through kustomization files, allowing you to build Kubernetes applications into a series of layers and patches for unlimited customization. Declarative management of Kubernetes objects can also be achieved by using Kustomize.

Starting with Kubernetes version 1.14, kubectl also supports the use of kustomization files to manage Kubernetes objects. To view the resources in the directory containing the kustomization file, execute the following command: kubectl kustomize to apply these resources, use the parameter-kustomize or-k flag to execute kubectl apply: kubectl apply-k Kustomize is a powerful tool that allows you to modify the Kubernetes application in any way you need. Unfortunately, this means that the learning curve can be very steep. Arbitrary customization also means that the application is more likely to be misconfigured.

One of the advanced use cases of Kustomize is to use Helm's Post Rendering capabilities to improve existing Helm chart capabilities, which is expected to make version upgrades smooth. What are the new features of Kustomize? Many tools in the Kubernetes ecosystem are embedded in Kustomize, the most prominent example being orchestration and continuous deployment of tools such as ArgoCD,Flux and Kubestack.

It is important to know that the version of Kustomize within kubectl lacks a large number of enhancements, so if you need these features, consider using Kustomize as a stand-alone CLI tool.

Skaffold

What does Skaffold do? Nick Kubala, a software engineer at Google, explained: we noticed that users of K8s spent too much time building and managing container images and needed to update the K8s list manually and redeploy the application even with few code updates. So we plan to develop a tool to automate these tasks so that users can focus on the code itself instead of doing these repetitive tasks. Skaffold is a command-line tool that contributes to the continuous development of Kubernetes applications.

Skaffold follows DevOps best practices. With Skaffold, you can easily deploy native code to kubernetes for testing. With skaffold.yaml, you can manage the build (build) and deployment (deploy) process of the project.

For builds, Skaffold can take advantage of Dockerfiles,Buildpacks,Bazel or even custom scripts. For deployment, Skaffold includes its limited template engine and can call kubectl,Helm or Kustomize.

Skaffold has three main modes of operation: skaffold dev- change code to automatically deploy applications. Code changes can be monitored at any time, and then rebuild and redeploy can be sent to the user's cluster at any time. Skaffold build- this will build your application and push it to the repository of your choice. Skaffold deploy- this will deploy the application you build to a cluster of your choice, possibly using Helm or Kustomize. If you want to build and deploy with a single command, you can use skaffold run. What are the new features of Skaffold? In 2020, the Skaffold team is committed to making the project easier to adapt to various workflows and to achieve greater interoperability with other tools. Some of these improvements include more flexible integration with CI/CD and GitOps, as well as better support for Python and Java.

In addition, skaffold debug can debug applications remotely. Although this is a good feature, it is tricky to use in a micro-service environment, and we strongly recommend that you use the Rookout tool. "what are the Kubernetes tools?" that's it. Thank you for reading. If you want to know more about the industry, you can follow the website, the editor will output more high-quality practical articles for you!

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