Скачать или смотреть 1. Introduction to Helm in Kubernetes

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Introduction to Helm

Helm is a package manager and templating engine for Kubernetes that simplifies deployment and management of applications. A Helm chart is a collection of YAML files that describe a Kubernetes application. These files are organized into a directory structure with a specific format.

Here's a brief summary of the sub-topics covered in Topic 1:

1. Understanding what is Helm and why we use it:
Helm is used to package, configure, and deploy Kubernetes applications easily.
It provides an easy to use and automated way of deploying Kubernetes apps and containers.
It automates the repetitive and time-consuming tasks of the deployment, thereby simplifying the overall process.

2. Basics of Chart and its Anatomy:
A chart contains various files and directories required to deploy a Kubernetes application.
It has a specific structure including `Chart.yaml`, `templates/` directory, `values.yaml` and `README.md`
`Chart.yaml` contains metadata for your chart such as version, name, etc.
The `templates/` directory contains the Kubernetes YAML files that define the Kubernetes objects.
`values.yaml` contains the default values of your chart that can be overridden during installation.

3. Installation of Helm:
You can install Helm on Linux, MacOS, or Windows by downloading the appropriate package from the Helm website.
Once Helm is installed, you need to configure the application to interact with your Kubernetes cluster.
The `helm init` command installs Tiller, Helm's server-side component, in your Kubernetes cluster.


$ curl https://raw.githubusercontent.com/hel... | bash

$ helm version

$ kubectl create serviceaccount --namespace kube-system tiller

$ kubectl create clusterrolebinding tiller-cluster-rule --clusterrole=cluster-admin --serviceaccount=kube-system:tiller

$ helm init --service-account tiller



4. Choose how to deploy Helm:

Standalone deployment: This deployment mode installs Helm locally.

Deploying Helm with RBAC: Kubernetes Role-Based Access Control (RBAC) provides authorization APIs that determine the resources that a user can access on a need-to-know basis. Helm requires RBAC enabled in a Kubernetes cluster.

Dealing with Kubernetes objects and metadata can be challenging, which is where Helm comes into the picture.



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