Centos7 搭建Kubernetes集群踩坑记(1master 2node)

1.准备docker和kubernetes环境

获取yum源-否则下载不了docker kubexxx         

cd /etc/yum.repos.d/

wget https://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo

wget https://mirrors.aliyun.com/kubernetes/yum/doc/yum-key.gpg

wget https://mirrors.aliyun.com/kubernetes/yum/doc/rpm-package-key.gpg

vi kubernetes.repo

输入一下内容
[kubernetes]
name=Kubernetes Repo
baseurl=https://mirrors.aliyun.com/kubernetes/yum/repos/kubernetes-el7-x86_64/
gpgcheck=1
gpgkey=https://mirrors.aliyun.com/kubernetes/yum/doc/yum-key.gpg
enable=1

保存退出后

rpm --import rpm-package-key.gpg
rpm --import yum-key.gpg

通过yum repolist 就可以查看是否配置成功 

master 运行 

yum install docker-ce kubelet-1.13.2 kubeadm-1.13.2 kubectl-1.13.2

node 运行 
 

yum install docker-ce kubelet-1.13.2 kubeadm-1.13.2 

安装完成之后----如果安装按顺序一个一个安装

需要修改docker 和kubelet 设置成开机自启 


systemctl enable docker

systemctl enable kubelet

设置kubelet禁用swap 

vi /etc/sysconfig/kubelet


KUBELET_EXTRA_ARGS="--fail-swap-on=false"

设置完成之后保存

kubelet 只有 kubeadm 启动起来之后才能显示 正常状态，

使用 kubeadm config images pull 检查kubernetes 启动需要的镜像

当你看到这个时候恭喜你，这是境外网站，需要翻墙，所以我们手动打tag let·s go

或者kubeadm init --image-repository=registry.cn-hangzhou.aliyuncs.com/google_containers

docker pull mirrorgooglecontainers/kube-apiserver:v1.13.2
docker pull mirrorgooglecontainers/kube-proxy:v1.13.2
docker pull mirrorgooglecontainers/kube-controller-manager:v1.13.2
docker pull mirrorgooglecontainers/kube-scheduler:v1.13.2
docker pull coredns/coredns:1.2.6
docker pull mirrorgooglecontainers/etcd:3.2.24
docker pull thejosan20/pause:3.1

漫长的手动tag 过程

docker tag mirrorgooglecontainers/kube-apiserver:v1.13.2 k8s.gcr.io/kube-apiserver:v1.13.2

docker tag mirrorgooglecontainers/kube-proxy:v1.13.2 k8s.gcr.io/kube-proxy:v1.13.2

docker tag mirrorgooglecontainers/kube-controller-manager:v1.13.2 k8s.gcr.io/kube-controller-manager:v1.13.2

docker tag mirrorgooglecontainers/kube-scheduler:v1.13.2 k8s.gcr.io/kube-scheduler:v1.13.2

docker tag mirrorgooglecontainers/etcd:3.2.24 k8s.gcr.io/etcd:3.2.24

docker tag coredns/coredns:1.2.6 k8s.gcr.io/coredns:1.2.6

docker tag thejosan20/pause:3.1 k8s.gcr.io/pause:3.1

master 执行 

kubeadm init --kubernetes-version=v1.13.2 --pod-network-cidr=10.244.0.0/16 --service-cidr=10.96.0.0/12 --ignore-preflight-errors=Swap

启动成功返回 

kubeadm join 192.168.1.33:6443 --token a4831a.75ba0zv67qhzxzib --discovery-token-ca-cert-hash sha256:e40d2ed7c4f3e2526bd858c96a50963371fcd50fba0f0a420f67a988554835f0

token 24h有效期 过期使用 kubeadm token create 创建新的token 

node 节点启动  

直接执行返回的参数就行 记得加--ignore-preflight-errors=Swap