kubernetes.default:名称无法解析 [英] kubernetes.default: Name does not resolve

问题描述

我正在运行OpenShift.

Im running OpenShift.

• OpenShift Master:v3.3.1.7
• Kubernetes Master:v1.3.0 + 52492b4

但是尝试在Jenkins中运行构建时遇到问题(在pod中运行).这不是我要构建的Java代码的问题，而是Kubernetes/Openshift设置中的问题.

But am having problems trying to run a build in Jenkins (running in a pod). This is not a problem with the java code that I'm trying to build, but is a problem in the Kubernetes/Openshift setup.

构建因以下原因而失败:

The builds fail with:

Caused by: java.net.UnknownHostException: kubernetes.default: Name does not resolve
    at java.net.Inet6AddressImpl.lookupAllHostAddr(Native Method)
    at java.net.InetAddress$2.lookupAllHostAddr(InetAddress.java:928)
    at java.net.InetAddress.getAddressesFromNameService(InetAddress.java:1323)
    at java.net.InetAddress.getAllByName0(InetAddress.java:1276)
    at java.net.InetAddress.getAllByName(InetAddress.java:1192)
    at java.net.InetAddress.getAllByName(InetAddress.java:1126)
    at okhttp3.Dns$1.lookup(Dns.java:39)
    ...

有人知道如何解决此问题吗?

Does anyone know how to fix this?

推荐答案

首先确认DNS实际在使用:

First confirm that DNS is actually working with:

› kubectl run -i -t busybox --image=busybox --restart=Never 
Waiting for pod default/busybox to be running, status is Pending, pod ready: false
If you don't see a command prompt, try pressing enter.

/ # nslookup kubernetes.default
Server:    192.168.60.10
Address 1: 192.168.60.10 kube-dns.kube-system.svc.cluster.local

Name:      kubernetes.default
Address 1: 192.168.60.1 kubernetes.default.svc.cluster.local

如果这样不起作用，请检查DNS Pod是否正在运行:

If that doesn't work check if the DNS pods are running:

kubectl get pods --namespace=kube-system -l k8s-app=kube-dns

会像这样回应……

NAME                 READY     STATUS    RESTARTS   AGE
kube-dns-v14-3u5zi   3/3       Running   36         166d

最后检查相关日志值得尝试:

Finally checking the related logs is worth a try:

kubectl logs --namespace=kube-system $(kubectl get pods --namespace=kube-system -l k8s-app=kube-dns -o name) -c kube-dns
kubectl logs --namespace=kube-system $(kubectl get pods --namespace=kube-system -l k8s-app=kube-dns -o name) -c dnsmasq
kubectl logs --namespace=kube-system $(kubectl get pods --namespace=kube-system -l k8s-app=kube-dns -o name) -c healthz

完整说明可在 kubernetes.io

这篇关于kubernetes.default:名称无法解析的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！