关于Kubernetes-v1.23.6-master-节点的初始化操作

当我们在master节点、安装部署完docker与Kubernetes / k8s 相关的软件后，并启动（docker，kubelet）后，接下来就是需要对master节点进行初始化操作了

如下，这里笔者使用的版本的为 Kubernetes-v1.23.6，初始化是使用kubeadm init命令，详细的参数如下所示：

注意点：执行前需要先将docker的Cgroup Driver由默认的cgroupfs修改成systemd，并重启docker让配置生效

[root@k8s-master qq-5201351]# kubeadm init \
> --apiserver-advertise-address 192.18.106.87 \
> --image-repository registry.aliyuncs.com/google_containers \
> --kubernetes-version v1.23.6 \
> --service-cidr=10.96.0.0/12 \
> --pod-network-cidr=10.224.0.0/16

如果没有相关的报错，就算是正常了，命令执行完成后，可以看到一段提示

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 192.18.106.87:6443 --token 8iz44r.cxj5duahe37wsdgq \
        --discovery-token-ca-cert-hash sha256:08752ac13ae6f821c44abdf6eb1fa2481777b82d20335e4467829ac20b503e55

根据提示，如果要开始使用k8s cluster，还需要在master节点上执行如下几条命令，这里笔者是使用root用户，所以去掉了sudo，最终命令如下：

mkdir -p $HOME/.kube
cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
chown $(id -u):$(id -g) $HOME/.kube/config

这样，master节点的初始化，就算是完成了，上面的都执行了，也才可以通过kubectl get nodes命令看到k8s集群中的master节点

其他说明：初始化后，我们可以也可以通过docker命令看出来，拉取了如下7个镜像：

[root@k8s-master ~]# docker images
REPOSITORY                                                        TAG       IMAGE ID       CREATED         SIZE
registry.aliyuncs.com/google_containers/kube-apiserver            v1.23.6   8fa62c12256d   12 months ago   135MB
registry.aliyuncs.com/google_containers/kube-scheduler            v1.23.6   595f327f224a   12 months ago   53.5MB
registry.aliyuncs.com/google_containers/kube-proxy                v1.23.6   4c0375452406   12 months ago   112MB
registry.aliyuncs.com/google_containers/kube-controller-manager   v1.23.6   df7b72818ad2   12 months ago   125MB
registry.aliyuncs.com/google_containers/etcd                      3.5.1-0   25f8c7f3da61   18 months ago   293MB
registry.aliyuncs.com/google_containers/coredns                   v1.8.6    a4ca41631cc7   19 months ago   46.8MB
registry.aliyuncs.com/google_containers/pause                     3.6       6270bb605e12   20 months ago   683kB
[root@k8s-master ~]#

 

 

 

 

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