直奔主题

• 操作系统：Centos 7.5
• 首先看一下master节点IP，修改下面的脚本中的地址。
• 复制的时候注意，使用纯文本，不要动空格，yaml就是这么烦人。
• 重要的事情说三遍：不用翻墙，不用翻墙，不用翻墙。

首先创建安装脚本

文件名 ./install-k8s.sh，内容如下：

# 重要提示: 请修改主节点，即可本机IPMASTER_IP=192.168.33.30cat << EOF > /etc/yum.repos.d/CentOS-Base.repo[base]name=CentOS-\$releasever - Basebaseurl=https://mirrors.tuna.tsinghua.edu.cn/centos/\$releasever/os/\$basearch/#mirrorlist=http://mirrorlist.centos.org/?release=\$releasever&arch=\$basearch&repo=osgpgcheck=1gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7#released updates[updates]name=CentOS-\$releasever - Updatesbaseurl=https://mirrors.tuna.tsinghua.edu.cn/centos/\$releasever/updates/\$basearch/#mirrorlist=http://mirrorlist.centos.org/?release=\$releasever&arch=\$basearch&repo=updatesgpgcheck=1gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7#additional packages that may be useful[extras]name=CentOS-\$releasever - Extrasbaseurl=https://mirrors.tuna.tsinghua.edu.cn/centos/\$releasever/extras/\$basearch/#mirrorlist=http://mirrorlist.centos.org/?release=\$releasever&arch=\$basearch&repo=extrasgpgcheck=1gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7#additional packages that extend functionality of existing packages[centosplus]name=CentOS-\$releasever - Plusbaseurl=https://mirrors.tuna.tsinghua.edu.cn/centos/\$releasever/centosplus/\$basearch/#mirrorlist=http://mirrorlist.centos.org/?release=\$releasever&arch=\$basearch&repo=centosplusgpgcheck=1enabled=0gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7EOFcat << EOF > /etc/yum.repos.d/kubernetes.repo[kubernetes]name=Kubernetesbaseurl=https://mirrors.aliyun.com/kubernetes/yum/repos/kubernetes-el7-x86_64/enabled=1gpgcheck=1repo_gpgcheck=1gpgkey=https://mirrors.aliyun.com/kubernetes/yum/doc/yum-key.gpg https://mirrors.aliyun.com/kubernetes/yum/doc/rpm-package-key.gpgEOFcat << EOF > /etc/yum.repos.d/docker-ce.repo[docker-ce-stable]name=Docker CE Stable - \$basearchbaseurl=https://mirrors.aliyun.com/docker-ce/linux/centos/7/\$basearch/stableenabled=1gpgcheck=1gpgkey=https://mirrors.aliyun.com/docker-ce/linux/centos/gpg[docker-ce-stable-debuginfo]name=Docker CE Stable - Debuginfo \$basearchbaseurl=https://mirrors.aliyun.com/docker-ce/linux/centos/7/debug-\$basearch/stableenabled=0gpgcheck=1gpgkey=https://mirrors.aliyun.com/docker-ce/linux/centos/gpg[docker-ce-stable-source]name=Docker CE Stable - Sourcesbaseurl=https://mirrors.aliyun.com/docker-ce/linux/centos/7/source/stableenabled=0gpgcheck=1gpgkey=https://mirrors.aliyun.com/docker-ce/linux/centos/gpg[docker-ce-edge]name=Docker CE Edge - \$basearchbaseurl=https://mirrors.aliyun.com/docker-ce/linux/centos/7/\$basearch/edgeenabled=0gpgcheck=1gpgkey=https://mirrors.aliyun.com/docker-ce/linux/centos/gpgEOFcat << EOF | tee /etc/yum.repos.d/epel.repo[epel]name=Extra Packages for Enterprise Linux 7 - \$basearchbaseurl=https://mirrors.tuna.tsinghua.edu.cn/epel/7/\$basearch#mirrorlist=https://mirrors.fedoraproject.org/metalink?repo=epel-7&arch=\$basearchfailovermethod=priorityenabled=1gpgcheck=0gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL-7[epel-debuginfo]name=Extra Packages for Enterprise Linux 7 - \$basearch - Debugbaseurl=https://mirrors.tuna.tsinghua.edu.cn/epel/7/\$basearch/debug#mirrorlist=https://mirrors.fedoraproject.org/metalink?repo=epel-debug-7&arch=\$basearchfailovermethod=priorityenabled=0gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL-7gpgcheck=1[epel-source]name=Extra Packages for Enterprise Linux 7 - \$basearch - Sourcebaseurl=https://mirrors.tuna.tsinghua.edu.cn/epel/7/SRPMS#mirrorlist=https://mirrors.fedoraproject.org/metalink?repo=epel-source-7&arch=\$basearchfailovermethod=priorityenabled=0gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL-7gpgcheck=1EOFyum install -y --setopt=obsoletes=0 docker-ce-18.06.1.ce-3.el7systemctl enable dockersystemctl start dockersetenforce 0sed -i s/^SELINUX=.*/SELINUX=disabled/ /etc/selinux/configswapoff -a && sysctl -w vm.swappiness=0sed -i -e "s/\(.*swap.*\)/#\1/" /etc/fstabcat << EOF | tee /etc/sysctl.d/k8s.confnet.ipv4.ip_forward = 1net.bridge.bridge-nf-call-ip6tables = 1net.bridge.bridge-nf-call-iptables = 1EOFsysctl -p /etc/sysctl.d/k8s.confyum install -y kubeadm-1.13.0 kubectl-1.13.0 kubelet-1.13.0systemctl enable kubelet.serviceif [ "$1"x = "node"x ]; then  echo init node ok. please run join cmd.  exit;ficat << EOF > kubeadm-init.yamlapiVersion: kubeadm.k8s.io/v1beta1kind: ClusterConfigurationkubernetesVersion: v1.13.0imageRepository: pollyduanapiServer:  certSANs:  - $MASTER_IPcontrolPlaneEndpoint: $MASTER_IP:6443networking:  podSubnet: "10.244.0.0/16"EOFcat << EOF > kube-flannel.yml---kind: ClusterRoleapiVersion: rbac.authorization.k8s.io/v1beta1metadata:  name: flannelrules:  - apiGroups:      - ""    resources:      - pods    verbs:      - get  - apiGroups:      - ""    resources:      - nodes    verbs:      - list      - watch  - apiGroups:      - ""    resources:      - nodes/status    verbs:      - patch---kind: ClusterRoleBindingapiVersion: rbac.authorization.k8s.io/v1beta1metadata:  name: flannelroleRef:  apiGroup: rbac.authorization.k8s.io  kind: ClusterRole  name: flannelsubjects:- kind: ServiceAccount  name: flannel  namespace: kube-system---apiVersion: v1kind: ServiceAccountmetadata:  name: flannel  namespace: kube-system---kind: ConfigMapapiVersion: v1metadata:  name: kube-flannel-cfg  namespace: kube-system  labels:    tier: node    app: flanneldata:  cni-conf.json: |    {      "name": "cbr0",      "plugins": [        {          "type": "flannel",          "delegate": {            "hairpinMode": true,            "isDefaultGateway": true          }        },        {          "type": "portmap",          "capabilities": {            "portMappings": true          }        }      ]    }  net-conf.json: |    {      "Network": "10.244.0.0/16",      "Backend": {        "Type": "vxlan"      }    }---apiVersion: extensions/v1beta1kind: DaemonSetmetadata:  name: kube-flannel-ds-amd64  namespace: kube-system  labels:    tier: node    app: flannelspec:  template:    metadata:      labels:        tier: node        app: flannel    spec:      hostNetwork: true      nodeSelector:        beta.kubernetes.io/arch: amd64      tolerations:      - operator: Exists        effect: NoSchedule      serviceAccountName: flannel      initContainers:      - name: install-cni        image: pollyduan/flannel:v0.10.0-amd64        command:        - cp        args:        - -f        - /etc/kube-flannel/cni-conf.json        - /etc/cni/net.d/10-flannel.conflist        volumeMounts:        - name: cni          mountPath: /etc/cni/net.d        - name: flannel-cfg          mountPath: /etc/kube-flannel/      containers:      - name: kube-flannel        image: pollyduan/flannel:v0.10.0-amd64        command:        - /opt/bin/flanneld        args:        - --ip-masq        - --kube-subnet-mgr        - --iface=eth1        resources:          requests:            cpu: "100m"            memory: "50Mi"          limits:            cpu: "100m"            memory: "50Mi"        securityContext:          privileged: true        env:        - name: POD_NAME          valueFrom:            fieldRef:              fieldPath: metadata.name        - name: POD_NAMESPACE          valueFrom:            fieldRef:              fieldPath: metadata.namespace        volumeMounts:        - name: run          mountPath: /run        - name: flannel-cfg          mountPath: /etc/kube-flannel/      volumes:        - name: run          hostPath:            path: /run        - name: cni          hostPath:            path: /etc/cni/net.d        - name: flannel-cfg          configMap:            name: kube-flannel-cfg---apiVersion: extensions/v1beta1kind: DaemonSetmetadata:  name: kube-flannel-ds-arm64  namespace: kube-system  labels:    tier: node    app: flannelspec:  template:    metadata:      labels:        tier: node        app: flannel    spec:      hostNetwork: true      nodeSelector:        beta.kubernetes.io/arch: arm64      tolerations:      - operator: Exists        effect: NoSchedule      serviceAccountName: flannel      initContainers:      - name: install-cni        image: quay.io/coreos/flannel:v0.10.0-arm64        command:        - cp        args:        - -f        - /etc/kube-flannel/cni-conf.json        - /etc/cni/net.d/10-flannel.conflist        volumeMounts:        - name: cni          mountPath: /etc/cni/net.d        - name: flannel-cfg          mountPath: /etc/kube-flannel/      containers:      - name: kube-flannel        image: quay.io/coreos/flannel:v0.10.0-arm64        command:        - /opt/bin/flanneld        args:        - --ip-masq        - --kube-subnet-mgr        resources:          requests:            cpu: "100m"            memory: "50Mi"          limits:            cpu: "100m"            memory: "50Mi"        securityContext:          privileged: true        env:        - name: POD_NAME          valueFrom:            fieldRef:              fieldPath: metadata.name        - name: POD_NAMESPACE          valueFrom:            fieldRef:              fieldPath: metadata.namespace        volumeMounts:        - name: run          mountPath: /run        - name: flannel-cfg          mountPath: /etc/kube-flannel/      volumes:        - name: run          hostPath:            path: /run        - name: cni          hostPath:            path: /etc/cni/net.d        - name: flannel-cfg          configMap:            name: kube-flannel-cfg---apiVersion: extensions/v1beta1kind: DaemonSetmetadata:  name: kube-flannel-ds-arm  namespace: kube-system  labels:    tier: node    app: flannelspec:  template:    metadata:      labels:        tier: node        app: flannel    spec:      hostNetwork: true      nodeSelector:        beta.kubernetes.io/arch: arm      tolerations:      - operator: Exists        effect: NoSchedule      serviceAccountName: flannel      initContainers:      - name: install-cni        image: quay.io/coreos/flannel:v0.10.0-arm        command:        - cp        args:        - -f        - /etc/kube-flannel/cni-conf.json        - /etc/cni/net.d/10-flannel.conflist        volumeMounts:        - name: cni          mountPath: /etc/cni/net.d        - name: flannel-cfg          mountPath: /etc/kube-flannel/      containers:      - name: kube-flannel        image: quay.io/coreos/flannel:v0.10.0-arm        command:        - /opt/bin/flanneld        args:        - --ip-masq        - --kube-subnet-mgr        resources:          requests:            cpu: "100m"            memory: "50Mi"          limits:            cpu: "100m"            memory: "50Mi"        securityContext:          privileged: true        env:        - name: POD_NAME          valueFrom:            fieldRef:              fieldPath: metadata.name        - name: POD_NAMESPACE          valueFrom:            fieldRef:              fieldPath: metadata.namespace        volumeMounts:        - name: run          mountPath: /run        - name: flannel-cfg          mountPath: /etc/kube-flannel/      volumes:        - name: run          hostPath:            path: /run        - name: cni          hostPath:            path: /etc/cni/net.d        - name: flannel-cfg          configMap:            name: kube-flannel-cfg---apiVersion: extensions/v1beta1kind: DaemonSetmetadata:  name: kube-flannel-ds-ppc64le  namespace: kube-system  labels:    tier: node    app: flannelspec:  template:    metadata:      labels:        tier: node        app: flannel    spec:      hostNetwork: true      nodeSelector:        beta.kubernetes.io/arch: ppc64le      tolerations:      - operator: Exists        effect: NoSchedule      serviceAccountName: flannel      initContainers:      - name: install-cni        image: quay.io/coreos/flannel:v0.10.0-ppc64le        command:        - cp        args:        - -f        - /etc/kube-flannel/cni-conf.json        - /etc/cni/net.d/10-flannel.conflist        volumeMounts:        - name: cni          mountPath: /etc/cni/net.d        - name: flannel-cfg          mountPath: /etc/kube-flannel/      containers:      - name: kube-flannel        image: quay.io/coreos/flannel:v0.10.0-ppc64le        command:        - /opt/bin/flanneld        args:        - --ip-masq        - --kube-subnet-mgr        resources:          requests:            cpu: "100m"            memory: "50Mi"          limits:            cpu: "100m"            memory: "50Mi"        securityContext:          privileged: true        env:        - name: POD_NAME          valueFrom:            fieldRef:              fieldPath: metadata.name        - name: POD_NAMESPACE          valueFrom:            fieldRef:              fieldPath: metadata.namespace        volumeMounts:        - name: run          mountPath: /run        - name: flannel-cfg          mountPath: /etc/kube-flannel/      volumes:        - name: run          hostPath:            path: /run        - name: cni          hostPath:            path: /etc/cni/net.d        - name: flannel-cfg          configMap:            name: kube-flannel-cfg---apiVersion: extensions/v1beta1kind: DaemonSetmetadata:  name: kube-flannel-ds-s390x  namespace: kube-system  labels:    tier: node    app: flannelspec:  template:    metadata:      labels:        tier: node        app: flannel    spec:      hostNetwork: true      nodeSelector:        beta.kubernetes.io/arch: s390x      tolerations:      - operator: Exists        effect: NoSchedule      serviceAccountName: flannel      initContainers:      - name: install-cni        image: quay.io/coreos/flannel:v0.10.0-s390x        command:        - cp        args:        - -f        - /etc/kube-flannel/cni-conf.json        - /etc/cni/net.d/10-flannel.conflist        volumeMounts:        - name: cni          mountPath: /etc/cni/net.d        - name: flannel-cfg          mountPath: /etc/kube-flannel/      containers:      - name: kube-flannel        image: quay.io/coreos/flannel:v0.10.0-s390x        command:        - /opt/bin/flanneld        args:        - --ip-masq        - --kube-subnet-mgr        resources:          requests:            cpu: "100m"            memory: "50Mi"          limits:            cpu: "100m"            memory: "50Mi"        securityContext:          privileged: true        env:        - name: POD_NAME          valueFrom:            fieldRef:              fieldPath: metadata.name        - name: POD_NAMESPACE          valueFrom:            fieldRef:              fieldPath: metadata.namespace        volumeMounts:        - name: run          mountPath: /run        - name: flannel-cfg          mountPath: /etc/kube-flannel/      volumes:        - name: run          hostPath:            path: /run        - name: cni          hostPath:            path: /etc/cni/net.d        - name: flannel-cfg          configMap:            name: kube-flannel-cfgEOFkubeadm init --config kubeadm-init.yaml  mkdir -p $HOME/.kube  sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config  sudo chown $(id -u):$(id -g) $HOME/.kube/configkubectl apply -f kube-flannel.ymlrm -f kubeadm-init.yaml kube-flannel.yml

master 节点

./install-k8s.sh

node 节点

首先，执行如下命令，安装必要的docker和kubernetes：

./install-k8s.sh node

然后直接执行初始化集群打印的日志中的join命令即可，形如：

kubeadm join 192.168.33.30:6443 --token s9j0fe.gvvwvjz66gmuxqeg --discovery-token-ca-cert-hash sha256:e77769812743386d71de272aafec24d8e3406691925cc6e312dedc139a4d521b

• 注意：以上命令不是你拿去直接用的，要从你master节点上初始化完成后打印的，复制你自己的再执行。