如何使用kind搭建k8s集群
1 创建 k8s 单节点集群
1.1 创建集群
# kind create cluster --name k8s-single-node-cluster
1.2 查看集群信息
# export KUBECONFIG="$(kind get kubeconfig-path --name="k8s-single-node-cluster")"
# echo $KUBECONFIG
# kubectl cluster-info
1.3 查看集群节点信息
# kubectl get nodes
1.4 查看集群组件信息
# kubectl get cs
1.5 创建 deployment 和 pod
# kubectl run nginx --image=nginx:1.14-alpine --replicas=2
1.6 查看 pod 信息
# kubectl get pods
2 创建 k8s 多节点集群（1 master 1 worker）
2.1 编写多节点集群配置文件
# touch /opt/kind/config/k8s-multi-nodes-cluster.yaml
文件内容如下：
kind: Cluster
apiVersion: kind.sigs.k8s.io/v1alpha3
nodes:
- role: control-plane
- role: worker
2.2 创建多节点集群
# kind create cluster --config ./k8s-multi-nodes-cluster.yaml --name k8s-multi-nodes-cluster
2.3 设置和获取多节点集群信息
# export KUBECONFIG="$(kind get kubeconfig-path --name="k8s-multi-nodes-cluster")"
# kubectl cluster-info
2.4 查看多节点集群信息
# kubectl get nodes
3 创建 HA 高可用 k8s 集群（多 master，多 worker）
3.1 编写高可用集群配置文件
# touch /opt/kind/config/k8s-ha-cluster.yaml
文件内容如下：
# 一共四个节点，二个 control-plane 节点，二个 workers 节点
kind: Cluster
apiVersion: kind.sigs.k8s.io/v1alpha3
kubeadmConfigPatches:- |
apiVersion: kubeadm.k8s.io/v1beta2
kind: ClusterConfiguration
metadata:
name: config
networking: serviceSubnet: 10.8.0.0/16
imageRepository: registry.aliyuncs.com/google_containers
nodeRegistration:
kubeletExtraArgs:
pod-infra-container-image: registry.aliyuncs.com/google_containers/pause:3.1
- |
apiVersion: kubeadm.k8s.io/v1beta2
kind: InitConfiguration
metadata: name: config
networking:
serviceSubnet: 10.8.0.0/16
imageRepository: registry.aliyuncs.com/google_containers
nodes:
- role: control-plane
- role: control-plane
- role: worker
- role: worker
3.2 创建高可用集群
# kind create cluster --config ./k8s-ha-cluster.yaml --name k8s-ha-cluster
3.3 设置和获取高可用集群信息
# export KUBECONFIG="$(kind get kubeconfig-path --name="k8s-ha-cluster")"
# kubectl cluster-info
3.4 查看高可用集群信息
# kubectl get nodes
4 删除集群
# kind delete cluster --name k8s-single-node-cluster
同时注意清除一下环境变量：
# unset KUBECONFIG
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