K8S搭建以及常见问题

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K8S搭建以及所遇到的问题

Kubernetes上安装Metallb

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kubectl edit configmap -n kube-system kube-proxy

执行上方命令，进入vim面板后，使用“/”键进行搜索，然后进行修改

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mode: ""   改为  mode: "ipvs"
strictARP: false 改为  strictARP: true

拉取yaml文件

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#官方镜像
kubectl apply -f https://raw.githubusercontent.com/metallb/metallb/v0.14.8/config/manifests/metallb-native.yaml
#国内镜像
kubectl apply -f https://raw.githubusercontent.com/xiaohh-me/kubernetes-yaml/main/network/metallb/metallb-native-v0.14.8.yaml

验证是否安装完成(当ready的数量对上和STATUS状态都为Running的时候则安装完成)

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kubectl get all -o wide -n metallb-system

编辑meatllb.yaml文件

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vim meatllb.yaml#进入vim编辑面板
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apiVersion: metallb.io/v1beta1
kind: IPAddressPool
metadata:
  name: first-pool
  namespace: metallb-system
spec:
  addresses:
  - 172.18.8.83-172.18.8.89
---
apiVersion: metallb.io/v1beta1
kind: L2Advertisement
metadata:
  name: example
  namespace: metallb-system
spec:
  ipAddressPools:
  - first-pool  #此处应该与上面spec的IP地址池同名

在执行该文件

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kubectl apply -f meatllb.yaml

两台ubuntu进行ssh连接

kubectl获取pod列表时，连接被拒绝

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[root@localhost ~]# kubectl get nodes
The connection to the server localhost:8080 was refused - did you specify the right host or port?

复制config文件到指定目录，重启

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mkdir -p $HOME/.kube
cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
source ~/.bash_profile

主节点生成token

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kubeadm token create --print-join-command

工作节点加入节点时使用生成的token（使用cri-docker搭建集群时需要添加）

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--cri-socket /var/run/cri-dockerd.sock

当工作节点加入一个新的主节点时

彻底卸载kubeadm、kubectl、kubelet，再重新安装

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sudo apt-get purge kubeadm kubectl kubelet kubernetes-cni kube*   #删除软件包
sudo apt-get autoremove
sudo yum remove -y kubeadm kubectl kubelet kubernetes-cni kube*   
sudo yum autoremove -y
systemctl stop kubelet                                            #停止服务清理配置
systemctl disable kubelet
rm -rf /etc/systemd/system/kubelet.service
rm -rf /etc/systemd/system/kube*
sudo rm -rf ~/.kube                                                #清理kubernetes配置
sudo rm -rf /etc/kubernetes/
sudo rm -rf /var/lib/kube*

重新安装

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apt-get update && apt-get install -y apt-transport-https
curl -fsSL https://mirrors.aliyun.com/kubernetes-new/core/stable/v1.29/deb/Release.key | gpg --dearmor -o /etc/apt/keyrings/kubernetes-apt-keyring.gpg
echo "deb [signed-by=/etc/apt/keyrings/kubernetes-apt-keyring.gpg] https://mirrors.aliyun.com/kubernetes-new/core/stable/v1.29/deb/ /" | tee /etc/apt/sources.list.d/kubernetes.list
apt-get update
apt-get install -y kubelet kubeadm kubectl
apt-mark hold kubelet kubeadm kubectl  # 锁定版本,apt upgrade时不会更新