新节点初始化 安装docker kubelet kubeadm（指定版本）
#先查看当前集群docker版本
[root@lecode-k8s-master manifests]# docker version
Client: Docker Engine - Community
Version: 20.10.14
API version: 1.39
Go version: go1.16.15
Git commit: a224086
Built: Thu Mar 24 01:49:57 2022
OS/Arch: linux/amd64
Context: default
Experimental: true
Server: Docker Engine - Community
Engine:
Version: 18.09.9
API version: 1.39 (minimum version 1.12)
Go version: go1.11.13
Git commit: 039a7df
Built: Wed Sep 4 16:22:32 2019
OS/Arch: linux/amd64
Experimental: false
#可以看到这里版本是20.10.14，新节点安装相同版本docker
[root@lecode-dev123 ~]# yum install docker-ce-20.10.14-3.el7 -y
#启动docker
systemctl enable docker && systemctl start docker
#配置镜像下载加速器
[root@lecode-dev123 ~]# cat /etc/docker/daemon.json
{"insecure-registries": ["36.133.91.100:8090"],
"registry-mirrors": ["http://hub-mirror.c.163.com", "http://f1361db2.m.daocloud.io"],
"data-root": "/data/docker",
"exec-opts": ["native.cgroupdriver=systemd"],
"log-driver": "json-file",
"log-opts": { "max-size": "100m"
},
"storage-driver": "overlay2"
}
#重启docker
systemctl daemon-reload
systemctl restart docker
docker info
#添加K8S源
cat > /etc/yum.repos.d/kubernetes.repo << EOF
[kubernetes]
name=Kubernetes
baseurl=https://mirrors.aliyun.com/kubernetes/yum/repos/kubernetes-el7-x86_64
enabled=1
gpgcheck=0
repo_gpgcheck=0
gpgkey=https://mirrors.aliyun.com/kubernetes/yum/doc/yum-key.gpg https://mirrors.aliyun.com/kubernetes/yum/doc/rpm-package-key.gpg
EOF
#安装kubeadm kubelet，注意版本，在集群使用kubectl version查看版本，指定相同版本新节点安装
yum install -y kubelet-1.16.0 kubeadm-1.16.0
systemctl enable kubelet
#在master节点查询加入节点的命令
[root@lecode-k8s-master manifests]# kubeadm token create --print-join-command
kubeadm join 192.168.1.11:6443 --token sqo8w7.s8plezzr9py2opcf --discovery-token-ca-cert-hash sha256:b7465ee6c96240b9063a090b1c66be5264f06a38e3ac7dc1e428b4d62fce54ef
#新节点加入集群
[root@lecode-dev123 ~]# kubeadm join 192.168.1.11:6443 --token sqo8w7.s8plezzr9py2opcf --discovery-token-ca-cert-hash sha256:b7465ee6c96240b9063a090b1c66be5264f06a38e3ac7dc1e428b4d62fce54ef
[preflight] Running pre-flight checks
[WARNING SystemVerification]: this Docker version is not on the list of validated versions: 20.10.14. Latest validated version: 18.09
[WARNING Hostname]: hostname "lecode-dev123" could not be reached
[WARNING Hostname]: hostname "lecode-dev123": lookup lecode-dev123 on 211.136.17.107:53: no such host
[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-1.16" 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.
#查看集群信息
[root@lecode-k8s-master manifests]# kubectl get node
NAME STATUS ROLES AGE VERSION
k8s-master Ready master 209d v1.16.0
lecode-dev-001 Ready <none> 208d v1.16.0
lecode-dev-002 Ready <none> 208d v1.16.0
lecode-dev123 NotReady <none> 7s v1.16.0
lecode-test-001 Ready <none> 208d v1.16.0
lecode-test-002 Ready <none> 208d v1.16.0
#等待网络插件安装
[root@lecode-k8s-master project-dep-yaml]# kubectl get node
NAME STATUS ROLES AGE VERSION
k8s-master Ready master 209d v1.16.0
lecode-dev-001 Ready <none> 208d v1.16.0
lecode-dev-002 Ready <none> 208d v1.16.0
lecode-dev123 Ready <none> 2m39s v1.16.0
lecode-test-001 Ready <none> 208d v1.16.0
lecode-test-002 Ready <none> 208d v1.16.0
