"Unsupported OS detected: Centos 8", but documentation says Centos 8 is supported

[chrismartino]

Versions

• Pi-hole: v5.18.2
• AdminLTE: v5.21
• FTL: v5.25.1

Platform

• OS and version: CentOS Stream release 8

• Platform: VM

Expected behavior

pihole -up to update pi-hole.

Actual behavior / bug

pihole -up reports:

 [i] Checking for / installing Required dependencies for OS Check...
  [✓] Checking for grep
  [✓] Checking for bind-utils

  [✗] Unsupported OS detected: Centos 8

Dig version check says CentOS 8 is not supported:

$ dig -t txt versions.pi-hole.net

; <<>> DiG 9.11.36-RedHat-9.11.36-11.el8 <<>> -t txt versions.pi-hole.net
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 14716
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 1232
;; QUESTION SECTION:
;versions.pi-hole.net.          IN      TXT

;; ANSWER SECTION:
versions.pi-hole.net.   5       IN      TXT     "Raspbian=10,11,12 Ubuntu=20,22,23,24 Debian=10,11,12 Fedora=39,40 CentOS=9"

But the documentation says CentOS 8 is supported:

Steps to reproduce

Steps to reproduce the behavior:

1. Login to CentOS 8 Stream system
2. Run pihole -up.
3. Fail

[yubiuser]

This is only because this PR is not merged yet: #1053.

CentOS 8 is EOL and our test suite failed permanently because relevant repo mirrors have been removed. We decided to drop CentOS 8 from the list of supported OS.

[PromoFaux]

Now merged!