系统centos7.6.1801
master: 192.168.60.115
slave1:192.168.60.102
slave2:192.168.60.101
保证所有swap分区是0
所有节点：
[root@k8s-master ~]# cat <<EOF > /etc/sysctl.d/k8s.conf
net.bridge.bridge-nf-call-ip6tables = 1
net.bridge.bridge-nf-call-iptables = 1
EOF
[root@k8s-master ~]# sysctl --system
[root@k8s-master ~]# yum install -y yum-utils device-mapper-persistent-data lvm2
[root@k8s-master ~]# yum-config-manager --add-repo https://download.docker.com/linux/cento
s/docker-ce.repo
[root@k8s-master ~]# yum install docker-ce-18.06.3.ce-3.el7
添加k8s阿里源
[root@k8s-master ~]# cat <<EOF > /etc/yum.repos.d/kubernetes.repo
[kubernetes]
name=Kubernetes
baseurl=https://mirrors.aliyun.com/kubernetes/yum/repos/kubernetes-el7-x86_64/
enabled=1
gpgcheck=1
repo_gpgcheck=1
gpgkey=https://mirrors.aliyun.com/kubernetes/yum/doc/yum-key.gpg https://mirrors.aliyun.com/kubernetes/yum/d
oc/rpm-package-key.gpg
EOF
安装k8s kubeadmin
[root@k8s-master ~]# yum install -y kubelet kubeadm kubectl #不安装默认1.18.4版本会报以下错，因kuberadmin，kubectl后续会拉取proxy等镜像最好同版本这个先这样
指定版本会报错：
[root@k8s-master ~]# yum install -y kubelet-1.13.3 kubeadm-1.13.3 kubectl-1.13.3 kubernete
s-cni-0.7.5
错误：软件包：kubelet-1.13.3-0.x86_64 (kubernetes)
需要：kubernetes-cni = 0.6.0
可用: kubernetes-cni-0.3.0.1-0.07a8a2.x86_64 (kubernetes)
kubernetes-cni = 0.3.0.1-0.07a8a2
可用: kubernetes-cni-0.5.1-0.x86_64 (kubernetes)
kubernetes-cni = 0.5.1-0
可用: kubernetes-cni-0.5.1-1.x86_64 (kubernetes)
kubernetes-cni = 0.5.1-1
可用: kubernetes-cni-0.6.0-0.x86_64 (kubernetes)
kubernetes-cni = 0.6.0-0
可用: kubernetes-cni-0.7.5-0.x86_64 (kubernetes)
kubernetes-cni = 0.7.5-0
错误：软件包：kubeadm-1.13.3-0.x86_64 (kubernetes)
需要：kubernetes-cni >= 0.6.0
可用: kubernetes-cni-0.3.0.1-0.07a8a2.x86_64 (kubernetes)
kubernetes-cni = 0.3.0.1-0.07a8a2
可用: kubernetes-cni-0.5.1-0.x86_64 (kubernetes)
kubernetes-cni = 0.5.1-0
可用: kubernetes-cni-0.5.1-1.x86_64 (kubernetes)
kubernetes-cni = 0.5.1-1
可用: kubernetes-cni-0.6.0-0.x86_64 (kubernetes)
kubernetes-cni = 0.6.0-0
可用: kubernetes-cni-0.7.5-0.x86_64 (kubernetes)
kubernetes-cni = 0.7.5-0
您可以尝试添加 --skip-broken 选项来解决该问题
您可以尝试执行：rpm -Va --nofiles --nodigest
自定义kuber的版本为1.18.3也可成功#没有1.18.4版本现在
主节点操作
[root@k8s-master ~]# kubeadm init --image-repository=registry.aliyuncs.com/google_containers --pod-network-cidr=172.17.0.0/16 --kubernetes-version=v1.18.3
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
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 192.168.60.115:6443 --token 67tkfz.u343ok0fmwhaawop \
--discovery-token-ca-cert-hash sha256:534f975a09ddc465d8f319e5d15cc5ef49a797726dd4e1feba4d1635b9a1e0e0
子节点通过以上黑体字添加到集群里
完成子节点添加后：
主节点操作：
以下错没有创建配置文件
[root@k8s-master ~]# kubectl get nodes
The connection to the server localhost:8080 was refused - did you specify the right host or port?
创建配置文件
[root@k8s-master ~]# mkdir -p $HOME/.kube
[root@k8s-master ~]#
[root@k8s-master ~]# sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
[root@k8s-master ~]# sudo chown $(id -u):$(id -g) $HOME/.kube/config
发现所有节点都是notready原因是没有安装网络组件
查日志 journalctl -f -u kubelet以下报错确定无疑
6月 19 16:34:07 k8s-master kubelet[9304]: E0619 16:34:07.402431 9304 kubelet.go:2187] Container runtime network not ready: NetworkReady=false reason:NetworkPluginNotReady message:docker: network plugin is not ready: cni config uninitialized
[root@k8s-master ~]# kubectl get nodes
NAME STATUS ROLES AGE VERSION
k8s-master NotReady master 2m57s v1.18.4
k8s-slave1.novalocal NotReady <none> 109s v1.18.4
k8s-slave2.novalocal NotReady <none> 118s v1.18.4
安装网路组件
[root@k8s-master ~]# kubectl apply -f https://raw.githubusercontent.com/coreos/flannel/master/Documentation/kube-flannel.yml
检查镜像：
[root@k8s-master ~]# docker images
检查所有k8s 系统组件 发现有拉去失败的删除失败的镜像重新拉（网络原因）
也可以docker pull 镜像手动去拉保证flannel组件版本节点一致自动会是running状态
[root@k8s-master ~]# kubectl apply -f https://raw.githubusercontent.com/coreos/flannel/master/Documentation/kube-flannel.yml
[root@k8s-master ~]# kubectl get pods -o wide -n kube-system
[root@k8s-master ~]# kubectl get nodes
NAME STATUS ROLES AGE VERSION
k8s-master Ready master 83m v1.18.4
k8s-slave1.novalocal Ready <none> 82m v1.18.4
k8s-slave2.novalocal Ready <none> 82m v1.18.4