DNS problem pod is not resolving

Rancher
1

So for starters, I deployed my cluster with the following customizations:

 kube_api:
  service_cluster_ip_range: 172.31.0.0/17
  always_pull_images: false
  pod_security_policy: false
  service_node_port_range: 30000-32767
kube_controller:
  cluster_cidr:  172.31.128.0/17
  service_cluster_ip_range:  172.31.0.0/17
kubelet:
  cluster_domain: cluster.local
  cluster_dns_server:  172.31.0.10
  extra_binds:
    - "/kubernetes:/data"

I have some test pods running in the minio namespace:

minio1-0               0/1     Running   142        12h
minio1-1               0/1     Running   142        12h 
minio1-2               0/1     Running   142        12h
minio1-3               0/1     Running   142        12h

DNS is not resolving:

API: SYSTEM()
Time: 16:30:28 UTC 02/14/2020
Error: lookup minio1-0.minio.default.svc.cluster.local on 172.31.0.10:53: no such host
host=minio1-0.minio.default.svc.cluster.local, elapsedTime=2 minutes elapsed

I created a dns utility pod and ran some tests:

I can resolve the bare metal node:
/ # nslookup IPADDRESS
IPADDRESS.in-addr.arpa name = zz50p01if-07081501.example.com.

I can’t resolve any pods:

/ # nslookup minio1-0.minio1.svc.cluster.local
Server: 172.31.0.10
Address: 172.31.0.10#53

** server can’t find minio1-0.minio1.svc.cluster.local: NXDOMAIN

Thanks for any help. Totally clueless when it comes to Kubernetes and DNS.

2

3 years and no answer :frowning:

Have you ever solved this? Also stuck with the exact same problem.

3

What is your service name and namespace? pods should register with the service and you can communicate with them through the service.

apiVersion: v1
kind: Service
metadata:
name: ddns-updater
namespace: default

For example , I have a pod named ddns-updater and a service also called ddns-updater. To access one of the pods, I can resolve ddns-updater.default.svc.cluster.local to find it.

spec:
  ports:
    - protocol: TCP
      port: 8000
      targetPort: 8000
  selector:
    app: ddns-updater