5. Kubernetes 安装node加入集群

1. 配置镜像加速支持

2. 添加kubernetes的阿里巴巴源

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

重新生成yum本地缓存

yum makecache fast

image.png
image.png

3. 安装kubeadm和相关工具

yum install kubelet-1.14.0 kubeadm-1.14.0 --disableexcludes=kubernetes

image.png
image.png

启动kubelet和docker并将其设置为开机自启动

systemctl enable docker && systemctl start docker
systemctl enable kubelet && systemctl start kubelet

image.png

4.为kubeadm命令生成配置文件

kubeadm config print init-defaults > init.defaults.yaml
cp init.defaults.yaml join-config.yaml

# join-config.yaml
apiVerision: kubeadm.k8s.io.v1beta1
kind: JoinConfiguration
discovery:
  bootstrapToken:
    apiServerEndpoint: 192.168.32.138:6443
    token: lpqedc.ur4t7ta4tj6oal1x

image.png
image.png

5. 执行kubeadm join命令，将本node加入集群

image.png

[preflight] Running pre-flight checks
    [WARNING IsDockerSystemdCheck]: detected "cgroupfs" as the Docker cgroup driver. The recommended driver is "systemd". Please follow the guide at https://kubernetes.io/docs/setup/cri/
[preflight] Reading configuration from the cluster...
[preflight] FYI: You can look at this config file with 'kubectl -n kube-system get cm kubeadm-config -oyaml'
[kubelet-start] Downloading configuration for the kubelet from the "kubelet-config-1.14" ConfigMap in the kube-system namespace
[kubelet-start] Writing kubelet configuration to file "/var/lib/kubelet/config.yaml"
[kubelet-start] Writing kubelet environment file with flags to file "/var/lib/kubelet/kubeadm-flags.env"
[kubelet-start] Activating the kubelet service
[kubelet-start] Waiting for the kubelet to perform the TLS Bootstrap...

This node has joined the cluster:
* Certificate signing request was sent to apiserver and a response was received.
* The Kubelet was informed of the new secure connection details.

Run 'kubectl get nodes' on the control-plane to see this node join the cluster.