K8S丨报错汇总

发表于2020-03-21更新于2021-01-21字数统计601阅读次数

K8S丨报错汇总

1. 使用二进制方式安装K8S时使用kubectl命令报错

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

造成这个原因是因为kubectl去读取了默认配置文件位置，而我们二进制部署的目录与默认位置不一致

  • 解决思路

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    kubectl 默认从 ~/.kube/config 配置文件获取访问 kube-apiserver 地址、证书、用户名等信息，如果没有配置该文件，或者该文件个别参数配置出错，执行命令时出错：The connection to the server localhost:8080 was refused - did you specify the right host or port?

  • 解决办法

      1. 查看该文件是否存在，若不存在则生成
      1. 如果是使用bootstrap生成的证书，则需要找到你生成的位置，然后链接到默认位置
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        # 本实例中，我采用的是bootstrap生成的证书

        ln -sv /opt/kubernetes/node/conf.d/kubelet-bootstrap.kubeconfig /root/.kube/config

2. 部署CoreDns报错unknown field "seccompProfile" in....

查看报错信息,问题出在seccompProfile字段,结合官方模版对比,官方模版里已经没有这个字段了,所以删除即可

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[root@k8s-master1 yaml]# kubectl apply -f coredns.yaml
serviceaccount/coredns created
clusterrole.rbac.authorization.k8s.io/system:coredns created
clusterrolebinding.rbac.authorization.k8s.io/system:coredns created
configmap/coredns created
error: error validating "coredns.yaml": error validating data: ValidationError(Deployment.spec.template.spec.securityContext): unknown field "seccompProfile" in io.k8s.api.core.v1.PodSecurityContext; if you choose to ignore these errors, turn validation off with --validate=false
  • 解决办法
    • 直接注释

3. kube-proxy报错Failed to delete stale service IP

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[root@k8s-node1 conf.d]# systemctl status kube-proxy -l
● kube-proxy.service - Kubernetes Proxy
   Loaded: loaded (/usr/lib/systemd/system/kube-proxy.service; enabled; vendor preset: disabled)
   Active: active (running) since Mon 2020-11-16 08:44:38 CST; 8min ago
 Main PID: 13222 (kube-proxy)
    Tasks: 8
   Memory: 14.6M
   CGroup: /system.slice/kube-proxy.service
           └─13222 /opt/kubernetes/node/bin/kube-proxy --config=/opt/kubernetes/node/conf.d/kube-proxy-config.yml --log-dir=/opt/kubernetes/node/logs --logtostderr=false --v=2

Nov 16 08:44:38 k8s-node1 systemd[1]: Stopped Kubernetes Proxy.
Nov 16 08:44:38 k8s-node1 systemd[1]: Started Kubernetes Proxy.
Nov 16 08:44:39 k8s-node1 kube-proxy[13222]: E1116 08:44:39.058588   13222 proxier.go:1599] Failed to delete stale service IP 192.168.80.2 connections, error: error deleting connection tracking state for UDP service IP: 192.168.80.2, error: error looking for path of conntrack: exec: "conntrack": executable file not found in $PATH
  • 解决办法
    • yum install conntrack -y
    • 后重启kube-proxy，问题解决

4. port-forward报错

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E0121 15:22:45.173375    2172 portforward.go:400] an error occurred forwarding 9090 -> 80: error forwarding port 80 to pod 117dedb4babe56bfecebab1a57f38e739e7fa83ce07fdfd35164c65b6463e2ee, uid : unable to do port forwarding: socat not found

4.port-forward报错.png

  • 解决办法
    • yum install socat -y