Question

我在从kubernetes.default.svc.cluster.local命名空间外部解决default时遇到问题

我正在每个命名空间上运行两个busybox：1.30 Pod，并且该名称仅从default命名空间中成功解析

    [admin@devsvr3 ~]$ kubectl exec -n default -ti busybox -- nslookup kubernetes
    Server:    10.96.0.10
    Address 1: 10.96.0.10 kube-dns.kube-system.svc.cluster.local
    Name:      kubernetes
    Address 1: 10.96.0.1 kubernetes.default.svc.cluster.local
    [admin@devsvr3 ~]$ kubectl exec -n namespace-dev -ti busybox -- nslookup kubernetes
    Server:         10.96.0.10
    Address:        10.96.0.10:53
    ** server can't find kubernetes.namespace-dev.svc.cluster.local: NXDOMAIN
    *** Can't find kubernetes.svc.cluster.local: No answer
    *** Can't find kubernetes.cluster.local: No answer
    *** Can't find kubernetes.namespace-dev.svc.cluster.local: No answer
    *** Can't find kubernetes.svc.cluster.local: No answer
    *** Can't find kubernetes.cluster.local: No answer
    [admin@devsvr3 ~]$

我在开放式环境中运行CentOS 7 kubernetes集群，并使用编织网CNI插件，这是我的CoreDNS配置

    apiVersion: v1
    data:
      Corefile: |
        .:53 {
            log
            errors
            health
            kubernetes cluster.local in-addr.arpa ip6.arpa {
              pods insecure
              upstream
              fallthrough in-addr.arpa ip6.arpa
            }
            prometheus :9153
            proxy . /etc/resolv.conf
            cache 30
            reload
            loadbalance
        }
    kind: ConfigMap
    metadata:
      creationTimestamp: "2019-01-28T10:59:25Z"
      name: coredns
      namespace: kube-system
      resourceVersion: "1177652"
      selfLink: /api/v1/namespaces/kube-system/configmaps/coredns
      uid: c6b5ddae-22eb-11e9-8689-0017a4770068

Answer 1

实际上，按照您的步骤进行操作时，我遇到了相同的问题。但是，如果您使用此Yaml创建吊舱，则它可以正常运行。更改busybox映像似乎最终会导致您描述的错误。会尝试找出原因。但是目前这是解决方案。

SELECT * FROM ( SELECT REGEXP_REPLACE(string, '-G56', '') str FROM test ) t WHERE t.str ~ 'BCD-XYZE12' ;

，然后： apiVersion: v1 kind: Pod metadata: name: busybox namespace: namespace-dev spec: containers: - name: busybox image: busybox:1.28 command: - sleep - "3600" imagePullPolicy: IfNotPresent restartPolicy: Always 它按预期工作并here进行了解释。

kubectl exec -ti -n=namespace-dev busybox -- nslookup kubernetes.default

Kubernetes.default nslookup无法从其他名称空间解析

1 个答案: