K8S 集群環境搭建 系統配置修改替換阿里源wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7

K8S 集群環境搭建

系統配置修改

替換阿里源

wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo nyum makecache

關閉防火墻

systemctl stop firewalld & systemctl disable firewalld

關閉Swap

執行swapoff -a可臨時關閉，但系統重啟后恢復

編輯/etc/fstab，注釋掉包含swap的那一行即可，重啟后可永久關閉，如下所示：

/dev/mapper/centos-root / xfs defaults 0 0nUUID=20ca01ff-c5eb-47bc-99a0-6527b8cb246e /boot xfs defaults 0 0n# /dev/mapper/centos-swap swap

關閉SeLinux 執行：

setenforce 0

安裝docker

yum -y install yum-utils # 添加 yum-config-manager 命令n nyum-config-manager --add-repo http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.reponyum install docker-ce -y # 安裝最新dockern n systemctl start docker n systemctl enable dockern ndocker run hello-world

修改或創建/etc/docker/daemon.json，加入下面的內容：

Copy

{n "exec-opts": ["native.cgroupdriver=systemd"]n}

卸載舊的版本包

yum erase docker-common-2:1.12.6-68.gitec8512b.el7.centos.x86_64n

安裝k8s

配置K8S的yum源

cat <<EOF > /etc/yum.repos.d/kubernetes.repon n[kubernetes]n nname=Kubernetesn nbaseurl=http://mirrors.aliyun.com/kubernetes/yum/repos/kubernetes-el7-x86_64n nenabled=1n ngpgcheck=0n nrepo_gpgcheck=0n ngpgkey=http://mirrors.aliyun.com/kubernetes/yum/doc/yum-key.gpgn n http://mirrors.aliyun.com/kubernetes/yum/doc/rpm-package-key.gpgn nEOF

安裝 K8S 組件

執行以下命令安裝 kubelet、kubeadm、kubectl：

yum install -y kubelet kubeadm kubectln nsystemctl enable kubelet && systemctl start kubeletn

部署 K8S 組件

由于原鏡像需要翻墻，所以從國內鏡像下載Docker 鏡像，然后從新改名

1）Master端：

根據所需鏡像名字先拉取國內資源

docker pull mirrorgooglecontainers/kube-apiserver:v1.16.2 && docker pull mirrorgooglecontainers/kube-controller-manager:v1.16.2 && docker pull mirrorgooglecontainers/kube-scheduler:v1.16.2 && docker pull mirrorgooglecontainers/kube-proxy:v1.16.2 && docker pull mirrorgooglecontainers/pause:3.1 && docker pull mirrorgooglecontainers/etcd:3.3.10 && docker pull coredns/coredns:1.3.1

修改鏡像tag

docker tag mirrorgooglecontainers/kube-apiserver:v1.16.2 k8s.gcr.io/kube-apiserver:v1.16.2 && docker tag mirrorgooglecontainers/kube-controller-manager:v1.16.2 k8s.gcr.io/kube-controller-manager:v1.16.2 && docker tag mirrorgooglecontainers/kube-scheduler:v1.16.2 k8s.gcr.io/kube-scheduler:v1.16.2 && docker tag mirrorgooglecontainers/kube-proxy:v1.16.2 k8s.gcr.io/kube-proxy:v1.16.2 && 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

刪除原來的鏡像

docker rmi mirrorgooglecontainers/kube-apiserver:v1.16.2 && docker rmi mirrorgooglecontainers/kube-controller-manager:v1.16.2 && docker rmi mirrorgooglecontainers/kube-scheduler:v1.16.2 && docker rmi mirrorgooglecontainers/kube-proxy:v1.16.2 && docker rmi mirrorgooglecontainers/pause:3.1 && docker rmi mirrorgooglecontainers/etcd:3.3.10 && docker rmi coredns/coredns:1.3.1

2）Node端：

根據所需鏡像名字先拉取國內資源

docker pull mirrorgooglecontainers/kube-proxy:v1.16.2 && docker pull mirrorgooglecontainers/pause:3.1

修改鏡像tag

docker tag mirrorgooglecontainers/kube-proxy:v1.16.2 k8s.gcr.io/kube-proxy:v1.16.2 && docker tag mirrorgooglecontainers/pause:3.1 k8s.gcr.io/pause:3.1n

刪除原來的鏡像

docker rmi mirrorgooglecontainers/kube-proxy:v1.16.2 && docker rmi mirrorgooglecontainers/pause:3.1n

3）初始化 Master

~# kubeadm init --apiserver-advertise-address 10.9.87.0 --pod-network-cidr 10.244.0.0/16 --kubernetes-version 1.16.2

4）初始化 Node

~# kubeadm join 10.9.87.0:6443 --token a70x0p.08wolbfh169ix7du --discovery-token-ca-cert-hash sha256:e58ed8ae6bdcb65c2efa38af6f88d151d426f909d1b36e475c2eca5cbf7d3b58n

5）校驗安裝

~# kubectl get nodes