Repo migration is not working in the new version 1.14.1

[angelsanchez]

• Gitea version (or commit ref): 1.14.1
• Git version: 2.30.2
• Operating system: GNU/Linux Alpine 3.13.5
  We are using the official docker image in k8s:

image:
    repository: gitea/gitea
    tag: 1.14.1

• Database (use [x]):
  • PostgreSQL
  • MySQL
  • MSSQL
  • SQLite
• Can you reproduce the bug at https://try.gitea.io:
  • Yes (provide example URL)
  • No
• Log gist:

The gitea container is logging this:

 2021/04/21 14:39:54 Started POST /api/v1/repos/migrate for 172.17.0.8:32768                                                                                                                           
 2021/04/21 14:39:54 Completed POST /api/v1/repos/migrate 409 Conflict in 37.199026ms

Description

1. We are creating a new migration from a public github.com repository using the API /api/v1/repos/migrate

The API is returning the following error:

422 Unprocessable Entity

Migration failed: Clone: exit status 128 - fatal: unable to access 'https://github.com/go-gitea/gitea.git/': Could not resolve host: github.com

If we try to connect with github from the gitea instance, it fails:

# curl -vv https://github.com
* Could not resolve host: github.com
* Closing connection 0
curl: (6) Could not resolve host: github.com

The OS that is using the gitea docker image is:

# cat /etc/alpine-release 
3.13.5

Could be it related to gliderlabs/docker-alpine#539?

[zeripath]

Is this still a problem?

[angelsanchez]

I have tested the new version 1.14.2 and the problem persists:

Could not resolve host: github.com

If I execute the following command inside the gitea instance, there is a DNS issue:

# ping github.com
ping: bad address 'github.com'

# nslookup -debug github.com
Server:		10.96.0.10
Address:	10.96.0.10:53
Query #0 completed in 2ms:
Name:	github.com
Address: 140.82.121.3
Query #1 completed in 2ms:
** server can't find github.com: NXDOMAIN

After researching and testing, it seems a problem with DNS resolution using the alpine:3.13 images on Minikube with the VirtualBox driver and it is related to: kubernetes/minikube#10830