Invalid/Outdated link breaking centos build in master.

[sitio-couto]

• This is a bug report
• This is a feature request
• I searched existing issues before opening this one

Expected behavior

Successful build after running the Makefile for the centos (rpm packages).

Actual behavior

The build fails at [stage-1 4/6] due to an invalid mirror link:

 => ERROR [stage-1 4/6] RUN yum-builddep -y /root/rpmbuild/SPECS/*.spec                                                           4.6s
------
 > [stage-1 4/6] RUN yum-builddep -y /root/rpmbuild/SPECS/*.spec:
#9 1.682 Loaded plugins: fastestmirror, ovl
#9 2.544 Enabling base-source repository
#9 2.545 Enabling extras-source repository
#9 2.545 Enabling updates-source repository
#9 2.552 Loading mirror speeds from cached hostfile
#9 2.587  * base: centos-altarch.itsbrasil.net
#9 2.653  * extras: centos-altarch.itsbrasil.net
#9 2.654  * updates: centos-altarch.itsbrasil.net
#9 3.137 http://vault.centos.org/altarch/7/extras/Source/repodata/repomd.xml: [Errno 14] HTTP Error 404 - Not Found
#9 3.137 Trying other mirror.
#9 3.138 To address this issue please refer to the below wiki article
#9 3.138
#9 3.138 https://wiki.centos.org/yum-errors
#9 3.138
#9 3.138 If above article doesn't help to resolve this issue please use https://bugs.centos.org/.
#9 3.138
#9 3.138 failure: repodata/repomd.xml from extras-source: [Errno 256] No more mirrors to try.
#9 3.138 http://vault.centos.org/altarch/7/extras/Source/repodata/repomd.xml: [Errno 14] HTTP Error 404 - Not Found
------
failed to solve with frontend dockerfile.v0: failed to build LLB: executor failed running [/bin/sh -c yum-builddep -y /root/rpmbuild/SPECS/*.spec]: runc did not terminate sucessfully
Makefile:66: recipe for target 'centos-7' failed
make: *** [centos-7] Error 1

Steps to reproduce the behavior

Tested with docker-ce version 19.03.8.
git clone https://github.com/docker/docker-ce
cd docker-ce/components/packaging/rpm/
sudo make centos

Output of docker version:

Client: Docker Engine - Community
 Version:           19.03.8
 API version:       1.40
 Go version:        go1.12.17
 Git commit:        a61721168e
 Built:             Thu Mar 12 01:34:40 2020
 OS/Arch:           linux/ppc64le
 Experimental:      false

Server: Docker Engine - Community
 Engine:
  Version:          19.03.8
  API version:      1.40 (minimum version 1.12)
  Go version:       go1.12.17
  Git commit:       a61721168e
  Built:            Thu Mar 12 01:32:39 2020
  OS/Arch:          linux/ppc64le
  Experimental:     false
 containerd:
  Version:          1.3.3-0ubuntu1~18.04.1
  GitCommit:
 runc:
  Version:          spec: 1.0.1-dev
  GitCommit:
 docker-init:
  Version:          0.18.0
  GitCommit:        fec3683

Output of docker info:

Client:
 Debug Mode: false

Server:
 Containers: 1
  Running: 0
  Paused: 0
  Stopped: 1
 Images: 18
 Server Version: 19.03.8
 Storage Driver: overlay2
  Backing Filesystem: <unknown>
  Supports d_type: true
  Native Overlay Diff: true
 Logging Driver: json-file
 Cgroup Driver: cgroupfs
 Plugins:
  Volume: local
  Network: bridge host ipvlan macvlan null overlay
  Log: awslogs fluentd gcplogs gelf journald json-file local logentries splunk syslog
 Swarm: inactive
 Runtimes: runc
 Default Runtime: runc
 Init Binary: docker-init
 containerd version:
 runc version:
 init version: fec3683
 Security Options:
  apparmor
  seccomp
   Profile: default
 Kernel Version: 4.15.0-74-generic
 Operating System: Ubuntu 18.04.4 LTS
 OSType: linux
 Architecture: ppc64le
 CPUs: 4
 Total Memory: 3.973GiB
 Name: ubuntu
 ID: DH4Z:M6LB:JXHL:AS5M:MFPB:I5KM:XF5G:CUS3:5EU6:SLPH:ZMRA:PTZX
 Docker Root Dir: /var/lib/docker
 Debug Mode: false
 Registry: https://index.docker.io/v1/
 Labels:
 Experimental: false
 Insecure Registries:
  127.0.0.0/8
 Live Restore Enabled: false

WARNING: No swap limit support

Additional environment details (AWS, VirtualBox, physical, etc.)

Distro: Ubuntu Bionic
Arch: ppc64le (Power PC 64 little endian)

[sitio-couto]

This issue was fixed in thaJeztah@ea42f7! (docker/docker-ce-packaging#446)