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I have a deployment where the replicas scale up and down which are all under a headless service. I am able to query ..svc.cluster.local which returns list of all pod IPs.

I wanted to know if its possible to query for each pod IP and get the hostname of the pod? It works for Pods on the same host machine. But its not resolving the pods from other hosts.

I noticed that it works for a StatefulSet. But its not working for Deployment.

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1 回答 1

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这已经在这里讨论过kube-dns。这里也有更多的讨论。

但是，PTR 记录对我来说coredns和 K8s 1.12 一起工作得很好：

$ kubectl get pod helloworld-xxxxxxxxxx-xxxxx -o=jsonpath="{.metadata.annotations['cni\.projectcalico\.org/podIP']}" | cut -d "/" -f 1
192.168.11.28
# Connect to another pod   
$ kubectl exec -it anotherpod-svc-xxxxxxxxxx-xxxxx bash
root@anotherpod-xxxxxxxxxx-xxxxx:/# dig +short -x 192.168.11.28
192-168-11-28.helloworld.default.svc.cluster.local.
root@anotherpod-xxxxxxxxxx-xxxxx:/# dig +short 192-168-11-28.helloworld.default.svc.cluster.local
192.168.11.28

# Another helloworld pod on a different physical machine
$ kubectl get pod helloworld-xxxxxxxxxx-xxxxx -o=jsonpath="{.metadata.annotations['cni\.projectcalico\.org/podIP']}" | cut -d "/" -f 1
192.168.4.6
# Connect to another pod   
$ kubectl exec -it anotherpod-svc-xxxxxxxxxx-xxxxx bash
root@anotherpod-svc-xxxxxxxxxx-xxxxx:/# dig +short -x 192.168.4.6
192-168-4-6.helloworld.default.svc.cluster.local.
root@anotherpod-xxxxxxxxxx-xxxxx:/# dig +short 192-168-4-6.helloworld.default.svc.cluster.local
192.168.4.6
于 2018-11-02T21:00:09.203 回答