安装最新版本的kubernets（+安装插件dashboard）

一、安装docker
// 安装系统工具:
sudo yum install -y yum-utils device-mapper-persistent-data lvm2

// 添加docker yum repo信息:
sudo yum-config-manager --add-repo http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo

// 更新并安装 docker:
sudo yum makecache fast
sudo yum -y install docker-ce

// 开启docker服务并设置开机启动:
sudo systemctl start docker
sudo systemctl enable docker

// 设置docker:
sudo mkdir -p /etc/docker
cat /etc/docker/daemon.json
{
  "exec-opts": ["native.cgroupdriver=systemd"],　　##这一步一定要有，否则在初始化kubectl的时候很可能会报错
  "bip": "10.20.0.1/16",
  "fixed-cidr": "10.20.0.0/16",
  "mtu": 1500,
  "insecure-registries": ["harbor.eainc.com"]
}

// 重启 docker
sudo systemctl daemon-reload
sudo systemctl restart docker

// 关闭swap，否则会导致kubectl服务启动失败
sudo swapoff -a    

二、安装kubelet、kubeadm、kubectl
// 设置kubernetes软件源
cat /etc/yum.repos.d/kubrenetes.repo
 [kubernetes]
 name=Kubernetes Repo
 baseurl=https://mirrors.aliyun.com/kubernetes/yum/repos/kubernetes-el7-x86_64/
 gpgcheck=0
 gpgkey=https://mirrors.aliyun.com/kubernetes/yum/doc/yum-key.gpg

// 安装 kubelet kubeadm kubectl 服务
yum install -y kubelet kubeadm kubectl

// 查看kubectl（很重要）
# kubectl version
 Client Version: version.Info{Major:"1", Minor:"15", GitVersion:"v1.15.0", GitCommit:"e8462b5b5dc2584fdcd18e6bcfe9f1e4d970a529", GitTreeState:"clean", BuildDate:"2019-06-19T16:40:16Z", GoVersion:"go1.12.5", Compiler:"gc", Platform:"linux/amd64"}

// kubectl 的版本是 1.15.0 ，后面docker拉取的kube- 服务也要为1.15.0

三、安装基础镜像

docker pull mirrorgooglecontainers/kube-apiserver:v1.15.0
docker pull mirrorgooglecontainers/kube-controller-manager:v1.15.0
docker pull mirrorgooglecontainers/kube-scheduler:v1.15.0
docker pull mirrorgooglecontainers/kube-proxy:v1.15.0
docker pull mirrorgooglecontainers/pause:3.1
docker pull mirrorgooglecontainers/etcd:3.3.10
docker pull coredns/coredns:1.3.1
docker pull docker.io/dockerofwj/flannel

docker tag mirrorgooglecontainers/kube-apiserver:v1.15.0 k8s.gcr.io/kube-apiserver:v1.15.0
docker tag mirrorgooglecontainers/kube-controller-manager:v1.15.0 k8s.gcr.io/kube-controller-manager:v1.15.0
docker tag mirrorgooglecontainers/kube-scheduler:v1.15.0 k8s.gcr.io/kube-scheduler:v1.15.0
docker tag mirrorgooglecontainers/kube-proxy:v1.15.0 k8s.gcr.io/kube-proxy:v1.15.0
docker tag mirrorgooglecontainers/pause:3.1 k8s.gcr.io/pause:3.1
docker tag mirrorgooglecontainers/etcd:3.3.10 k8s.gcr.io/etcd:3.3.10
docker tag coredns/coredns:1.3.1 k8s.gcr.io/coredns:1.3.1
docker tag docker.io/dockerofwj/flannel quay.io/coreos/flannel:v0.10.0-amd64

docker image rm mirrorgooglecontainers/kube-apiserver:v1.15.0
docker image rm mirrorgooglecontainers/kube-controller-manager:v1.15.0
docker image rm mirrorgooglecontainers/kube-scheduler:v1.15.0
docker image rm mirrorgooglecontainers/kube-proxy:v1.15.0
docker image rm mirrorgooglecontainers/pause:3.1
docker image rm mirrorgooglecontainers/etcd:3.3.10
docker image rm coredns/coredns:1.3.1
docker image rm docker.io/dockerofwj/flannel

四、k8s初始化

# kubeadm init --kubernetes-version=v1.15.0 --apiserver-advertise-address=192.168.37.49 --pod-network-cidr=10.10.0.0/16 --ignore-preflight-errors=swap　　
  ............................

　Your Kubernetes control-plane has initialized successfully!　　### 看到这一行说明初始化成功

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 192.168.3.4:6443 --token 21k4ls.cdne6rd3p8p31gpy 
    --discovery-token-ca-cert-hash sha256:dc5a8012c92dae38cedb7581153552d7f8b589bf670b67cb131da144eff83124
### 最后两行很重要，关系到node节点的设置

// 设置环境变量

mkdir -p $HOME/.kube

sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config

sudo chown $(id -u):$(id -g) $HOME/.kube/config

// 配置 kubectl并验证

echo "export KUBECONFIG=/etc/kubernetes/admin.conf" >> /etc/profile

source /etc/profile 

echo $KUBECONFIG #查看是否输出正确内容

// 设置系统参数

sysctl net.bridge.bridge-nf-call-iptables=1

 

五、Master安装Pod网络

// Pod网络用于Pod之间进行通信。这里我们选用flannel网络方案

vim kube-flannel.yaml
#添加以下内容
kind: ClusterRole
apiVersion: rbac.authorization.k8s.io/v1beta1
metadata:
  name: flannel
rules:
  - apiGroups:
      - ""
    resources:
      - pods
    verbs:
      - get
  - apiGroups:
      - ""
    resources:
      - nodes
    verbs:
      - list
      - watch
  - apiGroups:
      - ""
    resources:
      - nodes/status
    verbs:
      - patch
---
kind: ClusterRoleBinding
apiVersion: rbac.authorization.k8s.io/v1beta1
metadata:
  name: flannel
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: ClusterRole
  name: flannel
subjects:
- kind: ServiceAccount
  name: flannel
  namespace: kube-system
---
apiVersion: v1
kind: ServiceAccount
metadata:
  name: flannel
  namespace: kube-system
---
kind: ConfigMap
apiVersion: v1
metadata:
  name: kube-flannel-cfg
  namespace: kube-system
  labels:
    tier: node
    app: flannel
data:
  cni-conf.json: |
    {
      "name": "cbr0",
      "plugins": [
        {
          "type": "flannel",
          "delegate": {
            "hairpinMode": true,
            "isDefaultGateway": true
          }
        },
        {
          "type": "portmap",
          "capabilities": {
            "portMappings": true
          }
        }
      ]
    }
  net-conf.json: |
    {
      "Network": "10.10.0.0/16",
      "Backend": {
        "Type": "vxlan"
      }
    }
---
apiVersion: extensions/v1beta1
kind: DaemonSet
metadata:
  name: kube-flannel-ds-amd64
  namespace: kube-system
  labels:
    tier: node
    app: flannel
spec:
  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: quay.io/coreos/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: quay.io/coreos/flannel:v0.10.0-amd64
        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/v1beta1
kind: DaemonSet
metadata:
  name: kube-flannel-ds-arm64
  namespace: kube-system
  labels:
    tier: node
    app: flannel
spec:
  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/v1beta1
kind: DaemonSet
metadata:
  name: kube-flannel-ds-arm
  namespace: kube-system
  labels:
    tier: node
    app: flannel
spec:
  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/v1beta1
kind: DaemonSet
metadata:
  name: kube-flannel-ds-ppc64le
  namespace: kube-system
  labels:
    tier: node
    app: flannel
spec:
  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/v1beta1
kind: DaemonSet
metadata:
  name: kube-flannel-ds-s390x
  namespace: kube-system
  labels:
    tier: node
    app: flannel
spec:
  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-cfg

// 创建 flannel 网络
kubectl apply -f kube-flannel.yaml

// 节点加入集群（如果没有部署节点就不需要这一步，执行命令的环境是node节点环境）
kubeadm join 192.168.3.4:6443 --token 21k4ls.cdne6rd3p8p31gpy --discovery-token-ca-cert-hash sha256:dc5a8012c92dae38cedb7581153552d7f8b589bf670b67cb131da144eff83124

六、下载安装Dashboard

// 可以在https://github.com/kubernetes/dashboard/releases上查看最新版本
// 下载dashboard
wget https://raw.githubusercontent.com/kubernetes/dashboard/v1.10.1/src/deploy/recommended/kubernetes-dashboard.yaml

// 修改配置文件
# sed -i 's/k8s.gcr.io/loveone/g' kubernetes-dashboard.yaml
# sed -i '/targetPort:/a      nodePort: 30001
  type: NodePort' kubernetes-dashboard.yaml

// 部署dashboard
# kubectl create -f kubernetes-dashboard.yaml

// 启动相关服务
kubectl get deployment kubernetes-dashboard -n kube-system
kubectl get pods -n kube-system -o wide
kubectl get services -n kube-system

// 查看端口是否启动
netstat -ntlp|grep 30001



七、浏览器测试
由于https证书的问题，暂时只能先通过火狐浏览器增加安全例外的方式访问（亲测，google浏览器不行）

在Firefox浏览器输入Dashboard访问地址：https://192.168.3.4:30001

令牌获取方法如下：令牌是token后面的内容

# kubectl create serviceaccount  dashboard-admin -n kube-system
serviceaccount/dashboard-admin created

# kubectl create clusterrolebinding  dashboard-admin --clusterrole=cluster-admin --serviceaccount=kube-system:dashboard-admin
clusterrolebinding.rbac.authorization.k8s.io/dashboard-admin created

# kubectl describe secrets -n kube-system $(kubectl -n kube-system get secret | awk '/dashboard-admin/{print $1}')
Name:         dashboard-admin-token-96mdl
Namespace:    kube-system
Labels:       <none>
Annotations:  kubernetes.io/service-account.name: dashboard-admin
              kubernetes.io/service-account.uid: d70e1d17-94bd-4757-815c-f18dc1c9fd1b

Type:  kubernetes.io/service-account-token

Data
====
ca.crt:     1025 bytes
namespace:  11 bytes
token:      eyJhbGciOiJSUzI1NiIsImtpZCI6IiJ9.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.VpiN4MWsZzCPG25m3I77bKq2n4_5b1EnOR5pczlsNpVJC_wDJ6Hjbcm-MzANE2-kVkRTAdYZUAmIOZqadhDePg26ZqV6Z1hOkakyIGHi9h39Y459K2mNYSz9MnWqvRMBRS1qmeZy7jTqP4HwQWR_P0v8RFjyF07-2Y9pDrSVwcmH551WiD-fpoERgLKcSGrb9zYoyMUynWh0peQhIfW8NuDSL3krgY8ZuJ-gHKEAg7nUSt4GNIdCniR-vaCnmT8yC9M0Jv-1vV0dx6f4kTd65dQxuce6K37K_eBZ6mbU9bvqMXBBIurH1w2mly56RxsrONjBiXxluF0uq8GKxDjTfA

认证通过后，登陆dashboard首页如图：