ingress-nginx-controller-v1.7.1 【Could not resolve host: test.leo.me; Unknown error】

[Saltwater-leo]

Except for the *. localdev.me domain name, other created ingress domain names cannot be resolved

`[root@k8s-master-01 ingress]# kubectl describe ingress test-localhost
Name: test-localhost
Labels:
Namespace: default
Address: 10.101.221.21
Ingress Class: nginx
Default backend:
Rules:
Host Path Backends

---

test.leo.me
/ test:80 (10.244.1.54:80)
Annotations:
Events:
Type Reason Age From Message

---

Normal Sync 11m (x2 over 11m) nginx-ingress-controller Scheduled for sync
[root@k8s-master-01 ingress]#
[root@k8s-master-01 ingress]# curl test.leo.me
curl: (6) Could not resolve host: test.leo.me; Unknown error
[root@k8s-master-01 ingress]#
[root@k8s-master-01 ingress]# kubectl describe ingress demo-localhost
Name: demo-localhost
Labels:
Namespace: default
Address: 10.101.221.21
Ingress Class: nginx
Default backend:
Rules:
Host Path Backends

---

demo.localdev.me
/ demo:80 (10.244.1.34:80)
Annotations:
Events:
[root@k8s-master-01 ingress]# curl demo.localdev.me
See Other.

[root@k8s-master-01 ingress]#
`

[k8s-ci-robot]

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[tao12345666333]

Please describe the specific steps and expected behavior clearly. I don't understand the content of your issue. Also, please format all outputs.

[tao12345666333]

/remove-kind bug

[Saltwater-leo]

1. After installing ingress nginx,

2. Create depoyment 、service & ingress:

[root@k8s-master-01 ingress]# kubectl create deployment test --image=httpd --port=80
deployment.apps/test created
[root@k8s-master-01 ingress]# kubectl expose deployment test
service/test exposed
[root@k8s-master-01 ingress]# kubectl create ingress test-localhost --class=nginx --rule="test.leo.com/*=test:80"
ingress.networking.k8s.io/test-localhost created
[root@k8s-master-01 ingress]# curl test.leo.com
curl: (6) Could not resolve host: test.leo.com; Unknown error

Expected: Service can be accessed through domain name “test.leo.com”

Actual result: Unable to resolve domain name

Reference address: https://kubernetes.github.io/ingress-nginx/deploy/#quick -Start

[longwuyuan]

Show the below info ;

• host test.leo.com
• kubectl get svc -A -o wide

That docs page assumes awareness of DNS and basic understanding of routing a http request packet to the service created by the ingess-controller installation. Your latest update hints you have'nt got the DNS and the routing part taken care of.

Based on the ouput of the commands I requested, you can get expected response by eithr of below 3 changes ;

• using the --resolve flag of curl (check man curl)
• creating a /etc/hosts entry for test.leo.com
• overkill but making a DNS server entry for test.leo.com

We could edit that docs page and add details about the service type created by the ingress-nginx installation. And also add text about checking that service status. But all of that is assumed to be known to a user. Docs like shown below are related to this

https://kubernetes.io/docs/concepts/services-networking/ingress/

I will try to add some text on that docs page or you can submit a PR to improve that docs page

[longwuyuan]

/kind support

If you still can not fix it, please come discuss this on kubernetes.slack.com. Register at slack.k8s.io if required. Traditionally its better to track bugs and suspected bugs, new feature requests or clearly demonstrated problems, because there is less resources here and lots of engineers and users on slack.

[Saltwater-leo]

Thank you very much, my friend