centos7使用kubeadm搭建Kubernetes

发表于

前置环境

  • 服务器 centos7
  • docker 18.06.3-ce

搭建步骤

基础安装

1、 安装kubeadm

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cd /etc/yum.repos.d
vi kubernetes.repo
# 添加以下内容
[kubernetes]
name=Kubernetes
baseurl=https://mirrors.aliyun.com/kubernetes/yum/repos/kubernetes-el7-x86_64
enabled=1
gpgcheck=0
# 安装
yum install -y kubeadm

2、下载镜像

由于被墙的关系,需要先下载好kubeadm初始化所需的镜像。

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# 1. 查看所需镜像的版本
kubeadm config images list
# 结果如下
k8s.gcr.io/kube-apiserver:v1.15.0
k8s.gcr.io/kube-controller-manager:v1.15.0
k8s.gcr.io/kube-scheduler:v1.15.0
k8s.gcr.io/kube-proxy:v1.15.0
k8s.gcr.io/pause:3.1
k8s.gcr.io/etcd:3.3.10
k8s.gcr.io/coredns:1.3.1
# 2. 从阿里云镜像仓库下载所需镜像
docker pull registry.cn-hangzhou.aliyuncs.com/google_containers/kube-apiserver:v1.15.0
docker pull registry.cn-hangzhou.aliyuncs.com/google_containers/kube-controller-manager:v1.15.0
docker pull registry.cn-hangzhou.aliyuncs.com/google_containers/kube-scheduler:v1.15.0
docker pull registry.cn-hangzhou.aliyuncs.com/google_containers/kube-proxy:v1.15.0
docker pull registry.cn-hangzhou.aliyuncs.com/google_containers/pause:3.1
docker pull registry.cn-hangzhou.aliyuncs.com/google_containers/etcd:3.3.10
docker pull registry.cn-hangzhou.aliyuncs.com/google_containers/coredns:1.3.1
# 3. 给镜像打标签成kubeadm所需镜像名
docker tag registry.cn-hangzhou.aliyuncs.com/google_containers/kube-apiserver:v1.15.0  k8s.gcr.io/kube-apiserver:v1.15.0
docker tag registry.cn-hangzhou.aliyuncs.com/google_containers/kube-controller-manager:v1.15.0 k8s.gcr.io/kube-controller-manager:v1.15.0
docker tag registry.cn-hangzhou.aliyuncs.com/google_containers/kube-scheduler:v1.15.0 k8s.gcr.io/kube-scheduler:v1.15.0
docker tag registry.cn-hangzhou.aliyuncs.com/google_containers/kube-proxy:v1.15.0 k8s.gcr.io/kube-proxy:v1.15.0
docker tag registry.cn-hangzhou.aliyuncs.com/google_containers/pause:3.1 k8s.gcr.io/pause:3.1
docker tag registry.cn-hangzhou.aliyuncs.com/google_containers/etcd:3.3.10 k8s.gcr.io/etcd:3.3.10
docker tag registry.cn-hangzhou.aliyuncs.com/google_containers/coredns:1.3.1 k8s.gcr.io/coredns:1.3.1

3、 kubeadm初始化

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kubeadm init

结果如下:

4、 部署网络插件

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kubectl apply -f https://git.io/weave-kube-1.6

5、查看节点

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kubectl get nodes

可以看到当前唯一一个节点的状态，如下图所示

至此一个基本完整kubernetes集群已经搭建完成了

Dashboard可视化插件

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# 下载所需镜像
docker pull registry.cn-hangzhou.aliyuncs.com/google_containers/kubernetes-dashboard-amd64:v1.8.3
# 给镜像打标签成kubeadm所需镜像名
docker tag registry.cn-hangzhou.aliyuncs.com/google_containers/kubernetes-dashboard-amd64:v1.8.3 k8s.gcr.io/kubernetes-dashboard-amd64:v1.8.3
# 安装Dashboard
kubectl apply -f https://raw.githubusercontent.com/kubernetes/dashboard/v1.8.3/src/deploy/recommended/kubernetes-dashboard.yaml
# 启动proxy
kubectl proxy --address='0.0.0.0'  --accept-hosts='^*$'
# 访问路径
http://localhost:8001/api/v1/namespaces/kube-system/services/https:kubernetes-dashboard:/proxy/

需要配置kubeconfig或者令牌，这里不详细展开，打开链接界面如下