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A brief introduction to Helm

Helm is the preferred package management tool for Kubernetes. In K8S, there may be more than one YAML manifest file in one application. When there are many applications, these manifest files will appear very messy. Helm can solve this problem very well, Helm charts can provide template syntax for K8S YAML manifest file, and can implement one-click deployment, update, rollback, delete and so on.

Helm is only the client, and the server is Tiller. The specific architecture is as follows:

Related terms:

Helm command line client. The Tiller server, deployed in the K8S cluster, is responsible for listening to Helm requests, interacting with K8S apiserver, and realizing a series of operations such as application deployment and update. Repository chart repository, which is a http/https server. The Chart installation package consists of a series of manifest files. The instance after Release chart is deployed to K8S. II. Software environment

OS version: Centos7.5

K8S version: v1.14.0

Docker version: 18.09.5-ce

Helm version: v2.13.1

Third, install and configure Helm1. Binary deployment repository address: https://github.com/helm/helm/releases# downloads the corresponding version of wget https://storage.googleapis.com/kubernetes-helm/helm-v2.13.1-linux-amd64.tar.gztar zxf helm-v2.13.1-linux-amd64.tar.gzmv linux-amd64/helm / usr/local/bin/#helm usage helm help2. Configure an authorized account for Tiller

# currently, RBAC is enabled in the Kubernetes cluster. Specify the authorized account for tiller configuration:

Cat

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