Kind (Kubernetes In Docker)

前言

Kind（Kubernetes in Docker）用于在本地或CI环节，快速搭建1个可用的Kubernetes集群，进行本地开发/测试。

它通过在1个VM内启动多个Docker容器来运行Kubernetes节点，每1个容器相当于1个集群节点，从而组成一个完整的Kubernetes集群。

限制：

• Kind适合本地开发、测试和CI场景，不适合生产环境或真正的分布式Kubernetes架构。

• 支持单机容器间的集群交互（跨容器通信），不支持跨不同VM或物理主机的节点通信。

一、使用kind

kind is a tool for running local Kubernetes clusters using Docker container “nodes”.

kind was primarily designed for testing Kubernetes itself, but may be used for local development or CI.

1.安装kubectl

curl -LO "https://dl.k8s.io/release/v1.29.3/bin/linux/amd64/kubectl"
chmod +x kubectl
mv kubectl /usr/local/bin/

2.配置kind

kind-cluster.yaml 

kind: Cluster
apiVersion: kind.x-k8s.io/v1alpha4
networking:
  apiServerAddress: "192.168.10.100"
  apiServerPort: 6443
nodes:
  - role: control-plane
    image: kindest/node:v1.28.0
  - role: worker
    image: kindest/node:v1.28.0
  - role: worker
    image: kindest/node:v1.28.0
kubeadmConfigPatches:
  - |
    apiServer:
      certSANs:
        - "192.168.10.100"

3.安装kind

root@master01:/home/zhanggen# curl -Lo kind https://kind.sigs.k8s.io/dl/v0.23.0/kind-linux-amd64
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100    97  100    97    0     0    196      0 --:--:-- --:--:-- --:--:--   197
  0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0
100 6381k  100 6381k    0     0  2864k      0  0:00:02  0:00:02 --:--:-- 7227k
root@master01:/home/zhanggen# chmod +x kind
root@master01:/home/zhanggen# mv kind /usr/local/bin/
root@master01:/home/zhanggen# kind version
kind v0.23.0 go1.21.10 linux/amd64

4.启动kind

root@master01:/home/zhanggen# kind create cluster --name zhanggen-dev --config kind-cluster.yaml
Creating cluster "zhanggen-dev" ...
 ✓ Ensuring node image (kindest/node:v1.28.1) 🖼 
 ✓ Preparing nodes 📦 📦 📦  
 ✓ Writing configuration 📜 
 ✓ Starting control-plane 🕹️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️ 
 ✓ Installing CNI 🔌 
 ✓ Installing StorageClass 💾 
 ✓ Joining worker nodes 🚜 
Set kubectl context to "kind-zhanggen-dev"
You can now use your cluster with:

kubectl cluster-info --context kind-zhanggen-dev

Thanks for using kind! 😊

5.验证kind

服务端查看容器

root@master01:/home/zhanggen# docker ps
CONTAINER ID   IMAGE                  COMMAND                  CREATED       STATUS       PORTS                           NAMES
f2448a98e3f6   kindest/node:v1.28.0   "/usr/local/bin/entr…"   5 hours ago   Up 5 hours                                   zhanggen-dev-worker
781ac4527f88   kindest/node:v1.28.0   "/usr/local/bin/entr…"   5 hours ago   Up 5 hours   192.168.10.100:6443->6443/tcp   zhanggen-dev-control-plane
9bc376e142ca   kindest/node:v1.28.0   "/usr/local/bin/entr…"   5 hours ago   Up 5 hours                                   zhanggen-dev-worker2
root@master01:/home/zhanggen# kubectl get nodes
NAME                         STATUS   ROLES           AGE     VERSION
zhanggen-dev-control-plane   Ready    control-plane   4h53m   v1.28.0
zhanggen-dev-worker          Ready    <none>          4h53m   v1.28.0
zhanggen-dev-worker2         Ready    <none>          4h53m   v1.28.0

Windows客户端测试到服务端6443端口连通性

Test-NetConnection -ComputerName 192.168.10.100 -Port 6443

6.删除kind

root@master01:/home/zhanggen# kind delete cluster --name zhanggen-dev
root@master01:/home/zhanggen# docker ps
CONTAINER ID   IMAGE     COMMAND   CREATED   STATUS    PORTS     NAMES

 

 

官网

源代码