kubernetes 部署报错

标签：node kubernetes 部署节点报错 calico cni

1、安装网络插件报错

Warning FailedCreatePodSandBox 7m52s kubelet Failed to create pod sandbox: rpc error: code = Unknown desc = failed to set up sandbox container "abef835314ad175e12170af25ddc0603962e94d6818e71dd52c532c601fcfa8e" network for pod "coredns-6c76c8bb89-6krhq": networkPlugin cni failed to set up pod "coredns-6c76c8bb89-6krhq_kube-system" network: stat /var/lib/calico/nodename: no such file or directory: check that the calico/node container is running and has mounted /var/lib/calico/

问题原因：因为之前安装了calico网络插件未成功，导致calico配置残留的问题，然后找到相关的calico文件删除掉问题就解决了

连接Node节点，使用以下命令删除node节点上关于calico的配置信息，并重启kubelet服务
rm -rf /etc/cni/net.d/*
rm -rf /var/lib/cni/calico
systemctl restart kubelet
kubectl apply -f https://raw.githubusercontent.com/coreos/flannel/master/Documentation/kube-flannel.yml

2、networkPlugin cni failed to set up pod “coredns-9d85f5447-2j4t8_kube-system” network: open /run/flannel/subnet.env: no such file or directory

查看指定路径下是否存在subnet.env文件
cat /run/flannel/subnet.env的内容：
FLANNEL_NETWORK=10.244.0.0/16
FLANNEL_SUBNET=10.224.0.1/24
FLANNEL_MTU=1450
FLANNEL_IPMASQ=true

注：10.224.0.1 这个IP地址在初始化文件的时候指定
cat kubeadm-config.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: 10.0.2.4
  bindPort: 6443
nodeRegistration:
  criSocket: /var/run/dockershim.sock
  imagePullPolicy: IfNotPresent
  name: master-2-4
  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
kind: ClusterConfiguration
kubernetesVersion: 1.22.0
networking:
  dnsDomain: cluster.local
  podSubnet: "10.244.0.0/16"  #这里的IP地址
  serviceSubnet: 10.96.0.0/12   
scheduler: {}

3、Kubernetes的从节点上运行 kubectl get nodes 命令出现了如下错误

The connection to the server localhost:8080 was refused - did you specify the right host or port?

解决方法：出现这个问题的原因是kubectl命令需要使用kubernetes-admin来运行，解决方法如下，将主节点中的【/etc/kubernetes/admin.conf】文件拷贝到从节点相同目录下，然后配置环境变量：

echo "export KUBECONFIG=/etc/kubernetes/admin.conf" >> ~/.bash_profile
source ~/.bash_profile

4、将node节点加入kubernetes集群中roles名称不显示

[root@node1-2-5 ~]# kubectl get nodes
NAME         STATUS   ROLES                  AGE     VERSION
master-2-4   Ready    control-plane,master   53m     v1.22.6
node1-2-5    Ready    <none>                 7m44s   v1.22.6
node2-2-6    Ready    <none>                 7m39s   v1.22.6

解决方法：

kubectl label no node2-2-6 kubernetes.io/role=node

#node2-2-6  是node节点的hostname

5、初始化集群的时候报错

[ERROR Swap]: running with swap on is not supported. Please disable swap

原因：忘记关闭交换分区的使用，导致这里报错解决方法：

swapoff -a

6、node节点显示not ready

Container runtime network not ready: NetworkReady=false reason:NetworkPluginNotReady message:docker:

解决办法将master节点/opt/cni/bin 的文件拷贝到not ready 节点上去

标签：node,kubernetes,部署,节点,报错,calico,cni
From： https://www.cnblogs.com/shuiyuesheng/p/17014713.html