kind创建开发测试k8s集群

通过容器创建集群节点，可在单台机器上创建k8s集群
内部基于kubeadm创建集群

环境

CentOS 8.2
Docker-CE 18.06+
内核：
- net.ipv4.ip_forward=1
- net.bridge.bridge-nf-call-iptables=1
- vm.swappiness=0

安装

kind通过二进制文件部署，下载后赋予可执行权限并移动到PATH下即可。
linux下安装：

curl -Lo ./kind https://kind.sigs.k8s.io/dl/v0.11.1/kind-linux-amd64
chmod +x ./kind
mv ./kind /usr/bin/kind

mac和windows略

使用

https://kind.sigs.k8s.io/docs/user/quick-start/
默认通过"kind create cluster"创建的是单节点集群，只能宿主机访问，无法被外部访问

[root@vm kind]# kind create cluster
Creating cluster "kind" ...
 ✓ Ensuring node image (kindest/node:v1.21.1) 🖼
 ✓ Preparing nodes 📦
 ✓ Writing configuration 📜
 ✓ Starting control-plane 🕹️
 ✓ Installing CNI 🔌
 ✓ Installing StorageClass 💾
Set kubectl context to "kind-kind"
You can now use your cluster with:

kubectl cluster-info --context kind-kind

Not sure what to do next? 😅  Check out https://kind.sigs.k8s.io/docs/user/quick-start/
[root@vm kind]#
[root@vm1 kind]# kubectl  get node -o wide
NAME                 STATUS   ROLES                  AGE    VERSION   INTERNAL-IP   EXTERNAL-IP   OS-IMAGE       KERNEL-VERSION          CONTAINER-RUNTIME
kind-control-plane   Ready    control-plane,master   7m1s   v1.21.1   172.18.0.2    <none>        Ubuntu 21.04   4.18.0-193.el8.x86_64   containerd://1.5.2
[root@vm kind]# docker ps |grep kind
e027620b386c   kindest/node:v1.21.1   "/usr/local/bin/entr…"   8 minutes ago   Up 8 minutes   127.0.0.1:46475->6443/tcp   kind-control-plane
[root@vm kind]#

通过配置文件定制集群，下面为配置文件示例及说明：

kind: Cluster
apiVersion: kind.x-k8s.io/v1alpha4
name: cluster01
networking:
  # 绑定到宿主机上的地址，如果需要外部访问设置为宿主机ip
  apiServerAddress: "127.0.0.1"
  # 绑定到宿主机上的端口，如果建多个集群或者宿主机已经占用需要修改为不同的端口
  apiServerPort: 16443
  podSubnet: "10.244.0.0/16"
  serviceSubnet: "10.96.0.0/12"
  # 是否使用默认的cni插件kindnet
  disableDefaultCNI: false
  # kube-proxy使用的网络模式，none表示不需要kube-proxy组件
  kubeProxyMode: "ipvs"
nodes:
  # master节点，写一项表示加一个节点
- role: control-plane
  # 自定义节点使用的镜像及版本
  image: kindest/node:v1.22.5
  # 宿主机和节点文件共享挂载
  extraMounts:
    # 宿主机目录
  - hostPath: /kind/cluster1
    # 节点目录
    containerPath: /data
    readOnly: false
    selinuxRelabel: false
    propagation: HostToContainer
    # 节点端口到宿主机端口映射
  extraPortMappings:
    # 节点端口nodeport
  - containerPort: 38080
    # 宿主机端口
    hostPort: 18080
    # 宿主机端口监听地址，需要外部访问设置为"0.0.0.0"
    listenAddress: "127.0.0.1"
    protocol: TCP
  # worker节点，配置同master节点
- role: worker
  image: kindest/node:v1.22.5
- role: worker
  image: kindest/node:v1.22.5
- role: worker
  image: kindest/node:v1.22.5

创建自定义多节点集群：

# 自定义1 master、3 worker节点
[root@vm kind]# kind create cluster --config cluster1.yml
Creating cluster "cluster1" ...
 ✓ Ensuring node image (kindest/node:v1.22.5) 🖼
 ✓ Preparing nodes 📦 📦 📦 📦
 ✓ Writing configuration 📜
 ✓ Starting control-plane 🕹️
 ✓ Installing CNI 🔌
 ✓ Installing StorageClass 💾
 ✓ Joining worker nodes 🚜
Set kubectl context to "kind-cluster1"
You can now use your cluster with:

kubectl cluster-info --context kind-cluster1

Not sure what to do next? 😅  Check out https://kind.sigs.k8s.io/docs/user/quick-start/

# 查看集群信息，默认安装完成后会自动把kubeconfig追加到~/.kube/config中
[root@vm kind]# kubectl cluster-info
Kubernetes control plane is running at https://192.168.xx.xx:16443
CoreDNS is running at https://192.168.xx.xx:16443/api/v1/namespaces/kube-system/services/kube-dns:dns/proxy

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

# 查看集群节点信息
[root@vm kind]# kubectl get node -o wide
NAME                     STATUS   ROLES                  AGE    VERSION   INTERNAL-IP   EXTERNAL-IP   OS-IMAGE       KERNEL-VERSION          CONTAINER-RUNTIME
cluster1-control-plane   Ready    control-plane,master   2m1s   v1.22.5   172.18.0.5    <none>        Ubuntu 21.10   4.18.0-193.el8.x86_64   containerd://1.5.9
cluster1-worker          Ready    <none>                 86s    v1.22.5   172.18.0.4    <none>        Ubuntu 21.10   4.18.0-193.el8.x86_64   containerd://1.5.9
cluster1-worker2         Ready    <none>                 86s    v1.22.5   172.18.0.2    <none>        Ubuntu 21.10   4.18.0-193.el8.x86_64   containerd://1.5.9
cluster1-worker3         Ready    <none>                 86s    v1.22.5   172.18.0.3    <none>        Ubuntu 21.10   4.18.0-193.el8.x86_64   containerd://1.5.9

# 查看集群所有资源
[root@vm kind]# kubectl get all -A
NAMESPACE            NAME                                                 READY   STATUS    RESTARTS   AGE
kube-system          pod/coredns-78fcd69978-7cq66                         1/1     Running   0          3m15s
kube-system          pod/coredns-78fcd69978-vwzrc                         1/1     Running   0          3m15s
kube-system          pod/etcd-cluster1-control-plane                      1/1     Running   0          3m28s
kube-system          pod/kindnet-4hrl2                                    1/1     Running   0          2m57s
kube-system          pod/kindnet-5qcpj                                    1/1     Running   0          3m15s
kube-system          pod/kindnet-755hw                                    1/1     Running   0          2m57s
kube-system          pod/kindnet-z2tbn                                    1/1     Running   0          2m57s
kube-system          pod/kube-apiserver-cluster1-control-plane            1/1     Running   0          3m28s
kube-system          pod/kube-controller-manager-cluster1-control-plane   1/1     Running   0          3m28s
kube-system          pod/kube-proxy-4mt7g                                 1/1     Running   0          2m57s
kube-system          pod/kube-proxy-5b9d4                                 1/1     Running   0          2m57s
kube-system          pod/kube-proxy-n8b4k                                 1/1     Running   0          2m57s
kube-system          pod/kube-proxy-qr62h                                 1/1     Running   0          3m15s
kube-system          pod/kube-scheduler-cluster1-control-plane            1/1     Running   0          3m28s
local-path-storage   pod/local-path-provisioner-74567d47b4-m5wn8          1/1     Running   0          3m15s

NAMESPACE     NAME                 TYPE        CLUSTER-IP   EXTERNAL-IP   PORT(S)                  AGE
default       service/kubernetes   ClusterIP   10.96.0.1    <none>        443/TCP                  3m30s
kube-system   service/kube-dns     ClusterIP   10.96.0.10   <none>        53/UDP,53/TCP,9153/TCP   3m28s

NAMESPACE     NAME                        DESIRED   CURRENT   READY   UP-TO-DATE   AVAILABLE   NODE SELECTOR            AGE
kube-system   daemonset.apps/kindnet      4         4         4       4            4           <none>                   3m25s
kube-system   daemonset.apps/kube-proxy   4         4         4       4            4           kubernetes.io/os=linux   3m28s

NAMESPACE            NAME                                     READY   UP-TO-DATE   AVAILABLE   AGE
kube-system          deployment.apps/coredns                  2/2     2            2           3m28s
local-path-storage   deployment.apps/local-path-provisioner   1/1     1            1           3m24s

NAMESPACE            NAME                                                DESIRED   CURRENT   READY   AGE
kube-system          replicaset.apps/coredns-78fcd69978                  2         2         2       3m15s
local-path-storage   replicaset.apps/local-path-provisioner-74567d47b4   1         1         1       3m15s
[root@vm kind]#

由于配置文件定义了集群apiserver地址监听了宿主机地址，所以可以通过外部客户端访问集群，接下来使用和其他类型的集群无任何区别了。

posted @ 2022-03-12 18:38 longtds 阅读(679) 评论(0) 编辑收藏举报

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kind创建开发测试k8s集群

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