[BUG] Docker distribution builds are failing

[reta]

Describe the bug

Docker distribution builds are failing across the board [1]

CentOS Linux 8 - AppStream                      144  B/s |  38  B     00:00    
| �[91mError: Failed to download metadata for repo 'appstream': Cannot prepare internal mirrorlist: No URLs in mirrorlist
| �[0myum error: retry 1 in 10s
| CentOS Linux 8 - AppStream                      176  B/s |  38  B     00:00    
| �[91mError: Failed to download metadata for repo 'appstream': Cannot prepare internal mirrorlist: No URLs in mirrorlist
| �[0myum error: retry 2 in 10s
| CentOS Linux 8 - AppStream                      228  B/s |  38  B     00:00    
| �[91mError: Failed to download metadata for repo 'appstream': Cannot prepare internal mirrorlist: No URLs in mirrorlist
| �[0myum error: retry 3 in 10s
| CentOS Linux 8 - AppStream                      209  B/s |  38  B     00:00    
| �[91mError: Failed to download metadata for repo 'appstream': Cannot prepare internal mirrorlist: No URLs in mirrorlist
| �[0myum error: retry 4 in 10s
| CentOS Linux 8 - AppStream                      405  B/s |  38  B     00:00    
| �[91mError: Failed to download metadata for repo 'appstream': Cannot prepare internal mirrorlist: No URLs in mirrorlist
| �[0myum error: retry 5 in 10s
| CentOS Linux 8 - AppStream                       86  B/s |  38  B     00:00    
| �[91mError: Failed to download metadata for repo 'appstream': Cannot prepare internal mirrorlist: No URLs in mirrorlist
| �[0myum error: retry 6 in 10s

It seems like Centos 8, which we use for building Docker images is EOLed [3]. The workarounds for now are
a) use http://vault.centos.org for repositories
b) migrate from CentOS Linux 8 to CentOS Stream 8.
In the long term, we probably should change the base image.

[1] https://ci.opensearch.org/logs/ci/workflow/OpenSearch_CI/PR_Checks/Gradle_Check/gradle_check_2136.log
[2] https://forums.centos.org/viewtopic.php?f=54&t=78708
[3] https://www.centos.org/centos-linux-eol/

To Reproduce
Steps to reproduce the behavior: ./gradlew :distribution:docker:buildDockerImage

Expected behavior
The Docker image should be built successfully

Plugins
N/A

Screenshots
If applicable, add screenshots to help explain your problem.

Host/Environment (please complete the following information):
CI or local builds

Additional context
N/A

[AnanthGopal]

I got the same error, i fixed this error by using below link

https://stackoverflow.com/questions/70926799/centos-through-vm-no-urls-in-mirrorlist

[Shashwat-05]

Centos reached the end of life on 31 Dec, 2021. So instead, centos:7 can be used.