前提條件：
- ? ? ? ? 安裝了containerd、docker
- ? ? ? ? 關閉了firewalld、selinux
- ? ? ? ? 配置了時間同步服務 chronyd
- ? ? ? ? 關閉swap分區等
1、在控制節點、工作節點，安裝kubelet、kubeadm、kubectl
yum install -y kubelet-1.26.0 kubeadm-1.26.0 kubectl-1.26.0 --nogpgcheck
注意：若遇到如下錯誤，加上--nogpgcheck，跳過GPG檢查。
2、啟動kubelet服務
systemctl start kubelet ; systemctl enable kublet
#注意：如果啟動kubelet失敗，問題自己查閱、搜索下解決方案。
3、kubeadm 生成初始化k8s集群的配置文件、并修改
kubeadm config print init-defaults > kubeadm.yaml
[root@103 ~]# vim kubeadm.yaml?
apiVersion: kubeadm.k8s.io/v1beta3
bootstrapTokens:
- groups:
- system:bootstrappers:kubeadm:default-node-token
token: abcdef.0123456789abcdef
ttl: 24h0m0s
usages:
- signing
- authentication
kind: InitConfiguration
localAPIEndpoint:
advertiseAddress: 192.168.1.103?? ?## 指定ip
bindPort: 6443
nodeRegistration:
criSocket: unix:///run/containerd/containerd.sock
imagePullPolicy: IfNotPresent
name: node
taints: null
---
apiServer:
timeoutForControlPlane: 4m0s
apiVersion: kubeadm.k8s.io/v1beta3
certificatesDir: /etc/kubernetes/pki
clusterName: kubernetes
controllerManager: {}
dns: {}
etcd:
local:
dataDir: /var/lib/etcd
imageRepository: registry.cn-hangzhou.aliyuncs.com/google_containers ? ## 更改鏡像源
kind: ClusterConfiguration
kubernetesVersion: 1.26.0
networking:
dnsDomain: cluster.local
serviceSubnet: 10.96.0.0/12
podSubnet: 10.244.0.0/12?? ??? ?##? 添加pod子網
scheduler: {}
---
apiVersion: kubeproxy.config.k8s.io/v1alpha1?? ?## 添加代理模式 ipvs
kind: KubeProxyConfiguration?? ?##
mode: ipvs ##
---?
apiVersion: kubelet.config.k8s.io/v1beta1 ?## 更改cgroup驅動
kind: KubeletConfiguration ?##
cgroupDriver: systemd ?##
4、初始化k8s集群
kubeadm init --config kubeadm.yaml --ignore-preflight-errors=SystemVerification
sysctl: cannot stat /proc/sys/net/bridge/bridge-nf-call-ip6tables: No such file or directory
sysctl: cannot stat /proc/sys/net/bridge/bridge-nf-call-iptables: No such file or directory
net.ipv4.ip_forward = 1
[root@103 ~]#?
[root@103 ~]# modprobe br_netfilter
[root@103 ~]# vim /etc/sysctl.d/k8s.conf
[root@103 ~]#?
[root@103 ~]# sysctl -p /etc/sysctl.d/k8s.conf
net.bridge.bridge-nf-call-ip6tables = 1
net.bridge.bridge-nf-call-iptables = 1
net.ipv4.ip_forward = 1
[root@103 ~]#?
[root@103 ~]# kubeadm init --config kubeadm.yaml --ignore-preflight-errors=SystemVerification
[init] Using Kubernetes version: v1.26.0
[preflight] Running pre-flight checks
[WARNING FileExisting-tc]: tc not found in system path
[preflight] Pulling images required for setting up a Kubernetes cluster
[preflight] This might take a minute or two, depending on the speed of your internet connection
[preflight] You can also perform this action in beforehand using 'kubeadm config images pull'
[certs] Using certificateDir folder "/etc/kubernetes/pki"
[certs] Generating "ca" certificate and key
[certs] Generating "apiserver" certificate and key
[certs] apiserver serving cert is signed for DNS names [kubernetes kubernetes.default kubernetes.default.svc kubernetes.default.svc.cluster.local node] and IPs [10.96.0.1 192.168.1.103]
[certs] Generating "apiserver-kubelet-client" certificate and key
[certs] Generating "front-proxy-ca" certificate and key
[certs] Generating "front-proxy-client" certificate and key
[certs] Generating "etcd/ca" certificate and key
[certs] Generating "etcd/server" certificate and key
[certs] etcd/server serving cert is signed for DNS names [localhost node] and IPs [192.168.1.103 127.0.0.1 ::1]
[certs] Generating "etcd/peer" certificate and key
[certs] etcd/peer serving cert is signed for DNS names [localhost node] and IPs [192.168.1.103 127.0.0.1 ::1]
[certs] Generating "etcd/healthcheck-client" certificate and key
[certs] Generating "apiserver-etcd-client" certificate and key
[certs] Generating "sa" key and public key
[kubeconfig] Using kubeconfig folder "/etc/kubernetes"
[kubeconfig] Writing "admin.conf" kubeconfig file
[kubeconfig] Writing "kubelet.conf" kubeconfig file
[kubeconfig] Writing "controller-manager.conf" kubeconfig file
[kubeconfig] Writing "scheduler.conf" kubeconfig file
[kubelet-start] Writing kubelet environment file with flags to file "/var/lib/kubelet/kubeadm-flags.env"
[kubelet-start] Writing kubelet configuration to file "/var/lib/kubelet/config.yaml"
[kubelet-start] Starting the kubelet
[control-plane] Using manifest folder "/etc/kubernetes/manifests"
[control-plane] Creating static Pod manifest for "kube-apiserver"
[control-plane] Creating static Pod manifest for "kube-controller-manager"
[control-plane] Creating static Pod manifest for "kube-scheduler"
[etcd] Creating static Pod manifest for local etcd in "/etc/kubernetes/manifests"
[wait-control-plane] Waiting for the kubelet to boot up the control plane as static Pods from directory "/etc/kubernetes/manifests". This can take up to 4m0s
[apiclient] All control plane components are healthy after 7.002941 seconds
[upload-config] Storing the configuration used in ConfigMap "kubeadm-config" in the "kube-system" Namespace
[kubelet] Creating a ConfigMap "kubelet-config" in namespace kube-system with the configuration for the kubelets in the cluster
[upload-certs] Skipping phase. Please see --upload-certs
[mark-control-plane] Marking the node node as control-plane by adding the labels: [node-role.kubernetes.io/control-plane node.kubernetes.io/exclude-from-external-load-balancers]
[mark-control-plane] Marking the node node as control-plane by adding the taints [node-role.kubernetes.io/control-plane:NoSchedule]
[bootstrap-token] Using token: abcdef.0123456789abcdef
[bootstrap-token] Configuring bootstrap tokens, cluster-info ConfigMap, RBAC Roles
[bootstrap-token] Configured RBAC rules to allow Node Bootstrap tokens to get nodes
[bootstrap-token] Configured RBAC rules to allow Node Bootstrap tokens to post CSRs in order for nodes to get long term certificate credentials
[bootstrap-token] Configured RBAC rules to allow the csrapprover controller automatically approve CSRs from a Node Bootstrap Token
[bootstrap-token] Configured RBAC rules to allow certificate rotation for all node client certificates in the cluster
[bootstrap-token] Creating the "cluster-info" ConfigMap in the "kube-public" namespace
[kubelet-finalize] Updating "/etc/kubernetes/kubelet.conf" to point to a rotatable kubelet client certificate and key
[addons] Applied essential addon: CoreDNS
[addons] Applied essential addon: kube-proxy# 當你看到 succesfully ，恭喜你已經成功初始化了該臺機器
按照下面的提示，逐步操作即可。（其他的控制節點、工作節點操作大致如上。）
僅簡單記錄一下，開心！
