执行如下命令,所有节点都执行
初始化集群,仅在 master(centos01)上执行
[root@centos01 opt]# kubeadm init --apiserver-advertise-address 192.168.109.130 --image-repository registry.aliyuncs.com/google_containers --kubernetes-version v1.27.1 --pod-network-cidr=10.244.0.0/16
...
...
...
Your Kubernetes control-plane has initialized successfully!
To start using your cluster, you need to run the following as a regular user:
mkdir -p $HOME/.kube
sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
sudo chown $(id -u):$(id -g) $HOME/.kube/config
Alternatively, if you are the root user, you can run:
export KUBECONFIG=/etc/kubernetes/admin.conf
You should now deploy a pod network to the cluster.
Run "kubectl apply -f [podnetwork].yaml" with one of the options listed at:
https://kubernetes.io/docs/concepts/cluster-administration/addons/
Then you can join any number of worker nodes by running the following on each as root:
kubeadm join 192.168.109.130:6443 --token osh87v.zvo010kamsr8esmp \
--discovery-token-ca-cert-hash sha256:ff4607c7c194e9f756b1eb509e64d2d926b5f8f9556a85c3c14a2d25add28230
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其中,–apiserver-advertise-address:通告侦听地址–image-repository:指定镜像地址使用阿里云的,默认会使用谷歌镜像–kubernetes-version:指定当前的 kubernetes 的版本–pod-network-cidr=10.244.0.0/16:flannel 网络的固定地址范围
仔细阅读 kubeadm init 执行的结果,根据提示,还需要进行 3 步操作
1.笔者用的是 root 用户,仅在 master 节点执行
[root@centos01 opt]# vim /etc/profile
#在最后一行增加
export KUBECONFIG=/etc/kubernetes/admin.conf
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生效环境变量
[root@centos01 opt]# source /etc/profile
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2.安装网络插件,可以选择 calico 或 flannel,这里选择安装 flannel,仅在 master 节点执行
下载安装文件
[root@centos01 opt]# wget https://github.com/flannel-io/flannel/releases/latest/download/kube-flannel.yml
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修改配置
[root@centos01 opt]# vim kube-flannel.yml
#修改Network项的值,改为和--pod-network-cidr一样的值
"Network": "10.244.0.0/16"
#由于有时国内网络的问题,需要修改image的地址,把所有的docker.io改为dockerproxy.com
#共需要修改3处,两个值
image: dockerproxy.com/flannel/flannel:v0.22.0
image: dockerproxy.com/flannel/flannel-cni-plugin:v1.1.2
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安装网络插件
[root@centos01 opt]# kubectl apply -f kube-flannel.yml
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验证安装
[root@centos01 opt]# kubectl get pods -n kube-flannel
NAME READY STATUS RESTARTS AGE
kube-flannel-ds-dfngh 1/1 Running 17 (13m ago) 6d1h
kube-flannel-ds-qll8g 1/1 Running 12 (13m ago) 6d1h
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3.其他节点加入集群,非 master 节点都执行
[root@centos02 opt]# kubeadm join 192.168.109.130:6443 --token osh87v.zvo010kamsr8esmp --discovery-token-ca-cert-hash sha256:ff4607c7c194e9f756b1eb509e64d2d926b5f8f9556a85c3c14a2d25add28230
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验证安装结果,仅在 master 节点执行
[root@centos01 opt]# kubectl get nodes
NAME STATUS ROLES AGE VERSION
centos01 Ready control-plane 134m v1.27.1
centos02 Ready <none> 133m v1.27.1
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[root@centos01 opt]# kubectl get pods -n kube-system
NAME READY STATUS RESTARTS AGE
coredns-7bdc4cb885-l4vs2 1/1 Running 0 9m3s
coredns-7bdc4cb885-wzc8x 1/1 Running 0 9m3s
etcd-centos01 1/1 Running 0 9m18s
kube-apiserver-centos01 1/1 Running 0 9m18s
kube-controller-manager-centos01 1/1 Running 0 9m19s
kube-proxy-m92hr 1/1 Running 0 28s
kube-proxy-pv4hw 1/1 Running 0 9m3s
kube-scheduler-centos01 1/1 Running 0 9m18s
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重启一遍所有服务器节点,有可能会暴露出来隐藏的问题,再次验证以上结果,仍然正常。
最后,推荐一个发布应用的平台https://gitee.com/i512team/dhorse,是一个以应用为中心的云原生 DevOps 系统,能够实现持续集成、持续部署、微服务治理等功能,主要特点:部署简单、操作简洁、功能快速。
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