天天一點 Kubernetes(k8s)--1

天天一點 Kubernetes(k8s)--1

環境搭建

若是使用正式的 k8s，那咱們可能須要花不少錢買服務器才能夠，因此咱們選擇一個簡單易用的，輕量的，能夠在本地環境全量試驗 k8s 的環境。
網上有不少種，我選擇 kind，它知足我以上說的全部要求，使用 docker 運行，其餘的 minikube 較重使用虛擬機構建，k3s 合併了不少功能，不能方便的體現 k8s 的各類概念。

下載 kind

官方推薦 4 種方式

1.在macOS / Linux上：

curl -Lo ./kind https://github.com/kubernetes-sigs/kind/releases/download/v0.6.0/kind-$(uname)-amd64
chmod +x ./kind
mv ./kind /some-dir-in-your-PATH/kind

2.在Mac上經過Homebrew：

brew install kind

3.在Windows上：

curl.exe -Lo kind-windows-amd64.exe https://github.com/kubernetes-sigs/kind/releases/download/v0.6.0/kind-windows-amd64
Move-Item .\kind-windows-amd64.exe c:\some-dir-in-your-PATH\kind.exe

4.Chocolatey (https://chocolatey.org/packag...

choco install kind

5.使用網頁或者下載程序下載
我推薦第 5 種，由於牆的緣由，不少時候咱們用命令會下載不成功，或者下載回來的，不是正確的程序，我下載回來後一直執行錯誤，cat kind 一看，原來文件是空的。最後經過瀏覽器下載回來，移動到 /usr/local/bin 目錄，安裝成功。

➜  kind kind
kind creates and manages local Kubernetes clusters using Docker container 'nodes'

Usage:
  kind [command]

Available Commands:
  build       Build one of [base-image, node-image]
  completion  Output shell completion code for the specified shell (bash or zsh)
  create      Creates one of [cluster]
  delete      Deletes one of [cluster]
  export      exports one of [kubeconfig, logs]
  get         Gets one of [clusters, nodes, kubeconfig]
  help        Help about any command
  load        Loads images into nodes
  version     prints the kind CLI version

Flags:
  -h, --help              help for kind
      --loglevel string   DEPRECATED: see -v instead
  -q, --quiet             silence all stderr output
  -v, --verbosity int32   info log verbosity
      --version           version for kind

Use "kind [command] --help" for more information about a command.

建立集羣

➜  kind kind create cluster --name kind-1
Creating cluster "kind" ...
 ✓ Ensuring node image (kindest/node:v1.16.3) 🖼
 ✓ Preparing nodes 📦
 ✓ Writing configuration 📜
 ✓ Starting control-plane 🕹️
 ✓ Installing CNI 🔌
 ✓ Installing StorageClass 💾
Set kubectl context to "kind-kind-1"
You can now use your cluster with:

kubectl cluster-info --context kind-kind-1

Have a nice day! 👋

若是不指定 --name kind-1 默認名稱爲 kind。

獲取集羣

➜  kind kind get clusters
kind-1

獲取全部集羣

指定當前集羣

➜  kind kubectl cluster-info --context kind-kind-1
Kubernetes master is running at https://127.0.0.1:61230
KubeDNS is running at https://127.0.0.1:61230/api/v1/namespaces/kube-system/services/kube-dns:dns/proxy

To further debug and diagnose cluster problems, use 'kubectl cluster-info dump'.
➜  kind kind delete cluster

刪除集羣

kind delete cluster --name kind-kind-2
Deleting cluster "kind-kind-2" ...

若是不指定，默認刪除 kind-kind。