介绍
Kind 是 Kubernetes In Docker 的缩写，是使用 Docker 容器部署 Kubernetes 的工具。也是官方推荐的搭建本地集群的工具。
安装 Kind
$ curl -Lo ./kind https://github.com/kubernetes-sigs/kind/releases/download/v0.5.1/kind-$(uname)-amd64
$ chmod +x ./kind
$ sudo mv ./kind /usr/bin/
安装 Docker
步骤略
安装 kubectl
$ sudo yum install kubernetes-client
或
$ curl -LO https://storage.googleapis.com/kubernetes-release/release/$(curl -s https://storage.googleapis.com/kubernetes-release/release/stable.txt)/bin/linux/amd64/kubectl
$ chmod +x ./kubectl
$ sudo mv ./kubectl /usr/bin/kubectl
单节点集群
创建集群
$ sudo kind create cluster
Creating cluster "kind" ...
? Ensuring node image (kindest/node:v1.15.3)
? Preparing nodes
? Creating kubeadm config
? Starting control-plane
? Installing CNI
? Installing StorageClass
Cluster creation complete. You can now use the cluster with:
$ export KUBECONFIG="$(sudo kind get kubeconfig-path --name="kind")"
$ sudo kubectl cluster-info
Kubernetes master is running at https://127.0.0.1:34059
KubeDNS is running at https://127.0.0.1:34059/api/v1/proxy/namespaces/kube-system/services/kube-dns
To further debug and diagnose cluster problems, use 'kubectl cluster-info dump'.
也可以使用下面命令来在创建集群的时候制定集群名称。
$ sudo kind create cluster --name mycluster
查看集群
查看集群信息
$ export KUBECONFIG="$(sudo kind get kubeconfig-path --name="kind")"
$ sudo kubectl cluster-info
Kubernetes master is running at https://127.0.0.1:34059
KubeDNS is running at https://127.0.0.1:34059/api/v1/proxy/namespaces/kube-system/services/kube-dns
To further debug and diagnose cluster problems, use 'kubectl cluster-info dump'.
查看集群节点信息
$ sudo kubectl get nodes
NAME STATUS AGE
kind-control-plane Ready 1h
查看系统上的集群
$ sudo kind get clusters
kind
删除集群
$ sudo kind delete cluster
Deleting cluster "kind" ...
$KUBECONFIG is still set to use /root/.kube/kind-config-kind even though that file has been deleted, remember to unset it
多节点集群
对于多节点集群的创建，需要通过使用配置文件的方式来创建。
配置文件
先创建一个 yaml 格式文件，文件名就叫 kind-config.yaml，内容如下：
kind: Cluster
apiVersion: kind.sigs.k8s.io/v1alpha3
kubeadmConfigPatches:
- |
apiVersion: kubeadm.k8s.io/v1beta2
kind: ClusterConfiguration
metadata:
name: config
networking:
serviceSubnet: 10.0.0.0/16
- |
apiVersion: kubeadm.k8s.io/v1beta2
kind: InitConfiguration
metadata:
name: config
networking:
serviceSubnet: 10.0.0.0/16
nodes:
- role: control-plane
- role: control-plane
- role: control-plane
- role: worker
- role: worker
- role: worker
创建集群
通过配置文件创建集群
$ sudo kind create cluster --name mycluster --config kind-config.yaml
Creating cluster "mycluster" ...
✓ Ensuring node image (kindest/node:v1.15.3)
✓ Preparing nodes
✓ Configuring the external load balancer
✓ Creating kubeadm config
✓ Starting control-plane
✓ Installing CNI
✓ Installing StorageClass
✓ Joining more control-plane nodes
✓ Joining worker nodes
Cluster creation complete. You can now use the cluster with:
export KUBECONFIG="$(kind get kubeconfig-path --name="mycluster")"
kubectl cluster-info
查看集群
查看集群信息
$ export KUBECONFIG="$(sudo kind get kubeconfig-path --name="mycluster")"
$ sudo kubectl cluster-info
Kubernetes master is running at https://127.0.0.1:33483
KubeDNS is running at https://127.0.0.1:33483/api/v1/proxy/namespaces/kube-system/services/kube-dns
To further debug and diagnose cluster problems, use 'kubectl cluster-info dump'.
查看集群节点
$ sudo kubectl get nodes
NAME STATUS AGE
mycluster-control-plane Ready 6m
mycluster-control-plane2 Ready 5m
mycluster-control-plane3 Ready 4m
mycluster-worker Ready 4m
mycluster-worker2 Ready 4m
mycluster-worker3 Ready 4m
``` shell
查询集群容器
``` shell
$ sudo docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
93bb0d8df106 kindest/node:v1.15.3@sha256:27e388752544890482a86b90d8ac50fcfa63a2e8656a96ec5337b902ec8e5157 "/usr/local/bin/en..." 9 minutes ago Up 9 minutes 42008/tcp, 127.0.0.1:42008->6443/tcp mycluster-control-plane
2a1b67d11463 kindest/node:v1.15.3@sha256:27e388752544890482a86b90d8ac50fcfa63a2e8656a96ec5337b902ec8e5157 "/usr/local/bin/en..." 9 minutes ago Up 9 minutes mycluster-worker3
d7a8f74a9e95 kindest/node:v1.15.3@sha256:27e388752544890482a86b90d8ac50fcfa63a2e8656a96ec5337b902ec8e5157 "/usr/local/bin/en..." 9 minutes ago Up 9 minutes mycluster-worker
8d2aaa019a21 kindest/haproxy:2.0.0-alpine "/docker-entrypoin..." 9 minutes ago Up 9 minutes 33483/tcp, 127.0.0.1:33483->6443/tcp mycluster-external-load-balancer
dd2fca2b2401 kindest/node:v1.15.3@sha256:27e388752544890482a86b90d8ac50fcfa63a2e8656a96ec5337b902ec8e5157 "/usr/local/bin/en..." 9 minutes ago Up 9 minutes mycluster-worker2
f47d3c836f85 kindest/node:v1.15.3@sha256:27e388752544890482a86b90d8ac50fcfa63a2e8656a96ec5337b902ec8e5157 "/usr/local/bin/en..." 9 minutes ago Up 9 minutes 39892/tcp, 127.0.0.1:39892->6443/tcp mycluster-control-plane3
5feeee745b06 kindest/node:v1.15.3@sha256:27e388752544890482a86b90d8ac50fcfa63a2e8656a96ec5337b902ec8e5157 "/usr/local/bin/en..." 9 minutes ago Up 9 minutes 36154/tcp, 127.0.0.1:36154->6443/tcp mycluster-control-plane2
4213abeebc6f kindest/haproxy:2.0.0-alpine
删除集群
$ sudo kind delete cluster --name mycluster
Deleting cluster "mycluster" ...
$KUBECONFIG is still set to use /root/.kube/kind-config-mycluster even though that file has been deleted, remember to unset it
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