kubernetes（K8s）自动化安装一键部署一、每个节点先执行公共脚本二、部署Master节点

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我是靠谱客的博主体贴绿草，最近开发中收集的这篇文章主要介绍kubernetes（K8s）自动化安装一键部署一、每个节点先执行公共脚本二、部署Master节点，觉得挺不错的，现在分享给大家，希望可以做个参考。

概述

环境：我的机器配置：

IP地址	节点角色	CPU	Memory	Hostname	磁盘
192.168.25.150	master	>=2c	>=2G	master	sda、sdb
192.168.25.151	worker	>=2c	>=2G	node1	sda、sdb
192.168.25.152	worker	>=2c	>=2G	node2	sda、sdb

PS:机器内存必须大于2G 否则报错

一、每个节点先执行公共脚本

每个节点先设置名称：

192.168.25.150：

hostnamectl set-hostname master

192.168.25.151：

hostnamectl set-hostname node1

192.168.25.152：

hostnamectl set-hostname node2

下面是一键脚本(注意hosts里面要写每个node的ip)

可以写到一个文件里面批量执行

cat <<EOF >>/etc/hosts
 
192.168.182.133 master
 
192.168.182.134 node1
 
EOF

systemctl stop firewalld
 
systemctl disable firewalld
 
setenforce 0
 
sed -i "s/^SELINUX=enforcing/SELINUX=disabled/g" /etc/selinux/config
 
swapoff -a
 
sed -i 's/.*swap.*/#&/' /etc/fstab

cat > /etc/sysctl.d/k8s.conf <<EOF
 
net.bridge.bridge-nf-call-ip6tables = 1
 
net.bridge.bridge-nf-call-iptables = 1
 
EOF
 
sysctl --system
 
yum install -y wget
 
mkdir /etc/yum.repos.d/bak && mv /etc/yum.repos.d/*.repo /etc/yum.repos.d/bak
 
wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.cloud.tencent.com/repo/centos7_base.repo
 
wget -O /etc/yum.repos.d/epel.repo http://mirrors.cloud.tencent.com/repo/epel-7.repo
 
yum clean all && yum makecache

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/doc/rpm-package-key.gpg
 
EOF
 
wget https://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo -O /etc/yum.repos.d/docker-ce.repo
 
yum install -y docker-ce-18.06.1.ce-3.el7
 
systemctl enable docker && systemctl start docker
 
docker –version
 
docker version 18.06.1-ce, build e68fc7a
 
yum install -y kubelet kubeadm kubectl
 
systemctl enable kubelet

二、部署Master节点

1、kubeadm 执行安装（注意前面yum安装的版本在最后安装完成后有log打印版本千万要对上不然重来）

kubeadm init --kubernetes-version=1.15.0 --apiserver-advertise-address=192.168.25.150 --image-repository registry.aliyuncs.com/google_containers --service-cidr=10.1.0.0/16 --pod-network-cidr=10.244.0.0/16

Ps:注意前一步yum安装的 kubelet kubeadm kubectl 的版本

集群初始化成功后返回如下信息：

kubeadm join 192.168.25.150:6443 --token v0h9d5.y6ryogyngkjv8463 --discovery-token-ca-cert-hash sha256:ec13b19b3b97fa8cf308e9a7e744a639f1ab4bc124b692931934ad6b9cf747f2

记录生成的最后部分内容，此内容需要在其它节点加入Kubernetes集群时执行。

2、配置kubectl

mkdir -p /root/.kube

cp /etc/kubernetes/admin.conf /root/.kube/config

kubectl get nodes

kubectl get cs

3.部署flannel网络

kubectl apply -f  https://raw.githubusercontent.com/coreos/flannel/master/Documentation/kube-flannel.yml

#到这里可以先让node加入集群

----------------------------

4、部署Dashboard

// 获取yaml文件

wget https://raw.githubusercontent.com/kubernetes/dashboard/v1.10.1/src/deploy/recommended/kubernetes-dashboard.yaml

修改下载的kubernetes-dashboard.yaml文件

service模块配置暴露k8s集群外部访问端口，配置如下：

# ------------------- Dashboard Service ------------------- #

kind: Service
apiVersion: v1
metadata:
  labels:
    k8s-app: kubernetes-dashboard
  name: kubernetes-dashboard
  namespace: kube-system
spec:
  type: NodePort
  ports:
    - port: 443
      targetPort: 8443
      nodePort: 30001
  selector:
    k8s-app: kubernetes-dashboard

修改与文件镜像

       image: cuiyf/kubernetes-dashboard-amd64:v1.10.1

启动Dashboard

kubectl create -f kubernetes-dashboard.yaml

使用令牌登录（需要创建能够访问 Dashboard 的用户）

account.yaml 配置如下：

# Create Service Account
apiVersion: v1
kind: ServiceAccount
metadata:
  name: admin-user
  namespace: kube-system
---
# Create ClusterRoleBinding
apiVersion: rbac.authorization.k8s.io/v1beta1
kind: ClusterRoleBinding
metadata:
  name: admin-user
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: ClusterRole
  name: cluster-admin
subjects:
- kind: ServiceAccount
  name: admin-user
  namespace: kube-system

创建用户：

[root@master yaml]# kubectl create -f account.yaml

// 检查状态

kubectl get deployment kubernetes-dashboard -n kube-system

kubectl get pods -n kube-system -o wide

kubectl get services -n kube-system

netstat -ntlp|grep 30001

在Firefox浏览器输入Dashboard访问地址：https://192.168.25.150:30001（Chrome玩不了）

// 查看访问Dashboard的认证令牌

kubectl create serviceaccount  dashboard-admin -n kube-system

kubectl create clusterrolebinding  dashboard-admin --clusterrole=cluster-admin --serviceaccount=kube-system:dashboard-admin

kubectl describe secrets -n kube-system $(kubectl -n kube-system get secret | awk '/dashboard-admin/{print $1}')

#下面是登陆dashboard的令牌

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三、部署Node节点

#只需加入集群即可

kubeadm join 192.168.25.150:6443 --token v0h9d5.y6ryogyngkjv8463 --discovery-token-ca-cert-hash sha256:ec13b19b3b97fa8cf308e9a7e744a639f1ab4bc124b692931934ad6b9cf747f2

安装完成：

master节点 kubectl get nodes查看即可

PS: