默认已经安装好docker: docker安装请参考: Ubuntu安装Docker
关闭交换区
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swap打开的情况下，kubelet无法正常运行
root@node01:~# sudo swapoff -a root@node01:~# free -h total used free shared buff/cache available Mem: 3.5G 1.1G 672M 7.4M 1.8G 2.2G Swap: 0B 0B 0B
安装K8S
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vim /etc/apt/sources.list 添加阿里云镜像
deb http://mirrors.aliyun.com/ubuntu/ bionic main restricted universe multiverse deb http://mirrors.aliyun.com/ubuntu/ bionic-security main restricted universe multiverse deb http://mirrors.aliyun.com/ubuntu/ bionic-updates main restricted universe multiverse deb http://mirrors.aliyun.com/ubuntu/ bionic-proposed main restricted universe multiverse deb http://mirrors.aliyun.com/ubuntu/ bionic-backports main restricted universe multiverse deb-src http://mirrors.aliyun.com/ubuntu/ bionic main restricted universe multiverse deb-src http://mirrors.aliyun.com/ubuntu/ bionic-security main restricted universe multiverse deb-src http://mirrors.aliyun.com/ubuntu/ bionic-updates main restricted universe multiverse deb-src http://mirrors.aliyun.com/ubuntu/ bionic-proposed main restricted universe multiverse deb-src http://mirrors.aliyun.com/ubuntu/ bionic-backports main restricted universe multiverse -
apt-get update 更新apt源
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下载K8S组件
sudo apt install -y kubelet kubeadm kubectl- ps: 网络不好的话会下的比较久
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启动kubelet
sudo systemctl enable kubelet && sudo systemctl start kubelet -
安装完后查看版本
root@node01:~# kubelet --version Kubernetes v1.17.3
master 节点初始化
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由于kubeadm 默认从官网k8s.grc.io下载所需镜像，国内无法访问，因此需要通过–image-repository指定阿里云镜像仓库地址。
kubeadm init --image-repository registry.aliyuncs.com/google_containers --kubernetes-version v1.17.3 --pod-network-cidr=10.244.0.0/16-
执行成功最终行会看到:
kubeadm join 192.168.180.130:6443 --token zwoa7g.rwd7nb16k3z8aygg --discovery-token-ca-cert-hash sha256:5a214e1ca05b75aa88e9ace7691092f6159307cd727fa1306d48608a0a51b297
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在其他主机上依次执行token join命令
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查看集群所有节点:
root@node01:~# kubectl get nodes -o wide NAME STATUS ROLES AGE VERSION INTERNAL-IP EXTERNAL-IP OS-IMAGE KERNEL-VERSION CONTAINER-RUNTIME node01 Ready master 20h v1.17.3 192.168.180.130 <none> Ubuntu 18.04.2 LTS 5.3.0-42-generic docker://19.3.8 node02 Ready <none> 20h v1.17.3 192.168.180.131 <none> Ubuntu 18.04.2 LTS 5.3.0-42-generic docker://19.3.8 node03 Ready <none> 20h v1.17.3 192.168.180.132 <none> Ubuntu 18.04.2 LTS 5.3.0-42-generic docker://19.3.8 node04 Ready <none> 20h v1.17.3 192.168.180.133 <none> Ubuntu 18.04.2 LTS 5.3.0-42-generic docker://19.3.8 node05 Ready <none> 20h v1.17.3 192.168.180.134 <none> Ubuntu 18.04.2 LTS 5.3.0-42-generic docker://19.3.8