–pod-network-cidr=10.244.0.0/16
此时控制台输出如下，表示正在下载docker镜像：
[init] using Kubernetes version: v1.12.2
[preflight] running pre-flight checks
[preflight/images] Pulling images required for setting up a Kubernetes cluster
[preflight/images] This might take a minute or two, depending on the speed of your internet connection
[preflight/images] You can also perform this action in beforehand using ‘kubeadm config images pull’
- 经过漫长等待，镜像下载完毕后初始化成功，控制台输出如下信息：
[addons] Applied essential addon: CoreDNS
[addons] Applied essential addon: kube-proxy
Your Kubernetes master 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 ( i d − u ) : (id -u): (id−u):(id -g) $HOME/.kube/config
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/
You can now join any number of machines by running the following on each node
as root:
kubeadm join 192.168.119.157:6443 --token jtoche.kcb0kvylmdyfh089 --discovery-token-ca-cert-hash sha256:76090108cf1281c3c2b82b315f25d85380fadfa545581745c13600a0800016df
请将最后一整行的内容"kubeadm join 192.168.119.157:6443 …"保存好，这是node节点加入kubernates环境时用到的；
- 上面的输出信息中提示要做些配置信息，执行以下命令：
mkdir -p $HOME/.kube
&& cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
&& chown ( i d − u ) : (id -u): (id−u):(id -g) $HOME/.kube/config
- 部署pod network，官方文档如下图所示，有多种方案，如果选用Flannel，那么在执行kubeadmin init命令时，要带上绿框中的参数，这个我们刚才在执行kubeadmin init时已经带上了：
如上图红框所示，安装Flannel需要执行如下命令：
kubectl apply -f https://raw.githubusercontent.com/coreos/flannel/bc79dd1505b0c8681
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ece4de4c0d86c5cd2643275/documentation/kube-flannel.yml
执行成功后控制台输入如下：
[root@localhost ~]# kubectl apply -f https://raw.githubusercontent.com/coreos/flannel/bc79dd1505b0c8681ece4de4c0d86c5cd2643275/documentation/kube-flannel.yml
clusterrole.rbac.authorization.k8s.io/flannel created
clusterrolebinding.rbac.authorization.k8s.io/flannel created
serviceaccount/flannel created
configmap/kube-flannel-cfg created
daemonset.extensions/kube-flannel-ds-amd64 created
daemonset.extensions/kube-flannel-ds-arm64 created
daemonset.extensions/kube-flannel-ds-arm created
daemonset.extensions/kube-flannel-ds-ppc64le created
daemonset.extensions/kube-flannel-ds-s390x created
- 执行以下命令查看pod情况：
kubectl get pods --all-namespaces
控制台输出如下，如果您的pod信息少于以下内容，则有可能是某些：
[root@localhost ~]# kubectl get pods --all-namespaces
NAMESPACE NAME READY STATUS RESTARTS AGE
kube-system coredns-576cbf47c7-564dg 1/1 Running 0 164m
kube-system coredns-576cbf47c7-snqkd 1/1 Running 0 164m
kube-system etcd-localhost.localdomain 1/1 Running 0 164m
kube-system kube-apiserver-localhost.localdomain 1/1 Running 0 163m
kube-system kube-controller-manager-localhost.localdomain 1/1 Running 0 163m
kube-system kube-flannel-ds-amd64-r8wbb 1/1 Running 0 4m17s
kube-system kube-proxy-z7kn2 1/1 Running 0 164m
kube-system kube-scheduler-localhost.localdomain 1/1 Running 0 163m
- 执行命令docker images看看下载了哪些镜像：
