drop el-7, debian-buster, amazonlinux-2

[Habbie]

Short description

el-7 and debian buster are EOL already. Amazonlinux-2 goes EOL in six months and we never shipped those packages.

To be done (separate PR perhaps): the el7 devtoolset check in misc-dailies should be migrated for el8.

This is entirely untested and needs a strong review because of all the "if el7" things I took out from various files in various syntaxes.

Checklist

I have:

• read the CONTRIBUTING.md document
• compiled this code
• tested this code
• included documentation (including possible behaviour changes)
• documented the code
• added or modified regression test(s)
• added or modified unit test(s)
• checked that this code was merged to master

[Habbie]

Amazonlinux-2 goes EOL in six months

this claim was based on https://endoflife.date/amazon-linux which says 30 Jun 2025 (update submitted). However, https://aws.amazon.com/amazon-linux-2/faqs/ says 30 Jun 2026.

That said, I don't think Amazon Linux 2 is reason enough to hang on to all that legacy. I'm not even sure we have any users on it.

[coveralls]

Pull Request Test Coverage Report for Build 13178463027

Warning: This coverage report may be inaccurate.

This pull request's base commit is no longer the HEAD commit of its target branch. This means it includes changes from outside the original pull request, including, potentially, unrelated coverage changes.

• For more information on this, see Tracking coverage changes with pull request builds.
• To avoid this issue with future PRs, see these Recommended CI Configurations.
• For a quick fix, rebase this PR at GitHub. Your next report should be accurate.

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 288 unchanged lines in 16 files lost coverage.
• Overall coverage decreased (-8.2%) to 64.722%

---

Files with Coverage Reduction	New Missed Lines	%
pdns/misc.cc	1	62.77%
pdns/pollmplexer.cc	1	83.66%
pdns/recursordist/test-syncres_cc2.cc	3	88.91%
pdns/remote_logger.cc	3	53.81%
pdns/iputils.cc	3	56.07%
pdns/rcpgenerator.cc	3	90.64%
pdns/dnsdistdist/dnsdist-lbpolicies.cc	4	70.51%
pdns/dnsdistdist/dnsdist.cc	4	68.73%
pdns/recursordist/pdns_recursor.cc	4	72.54%
pdns/recursordist/test-syncres_cc1.cc	5	89.8%

Totals
Change from base Build 13133792161:	-8.2%
Covered Lines:	128273
Relevant Lines:	167090

---

💛 - Coveralls

[phonedph1]

I cannot offer a strong review but a weak review it eye balls good to me. There are a few spec file comments that refer to EL7 still (see the systemd runtime dir bits) but thats minor.

[Habbie]

There are a few spec file comments that refer to EL7 still (see the systemd runtime dir bits) but thats minor.

ah yes. I missed at least one comment there, thanks!

[zeha]

should this list be in sync with the list in builder.yml?

[Habbie]

no, in fact these days perhaps it should explicitly not overlap with it at all I think. builder-dispatch should contain a good default set for shipping packages (even if we don't builder-dispatch for releases any more). builder is older than all the more specific ones, and was for daily testing of distros we -don't- autobuild for in any other way.

builder-dispatch should be in sync with builder-packages (or ideally the list would live in one of them, but that's tricky). builder (which we should maybe give a useful suffix to explain what it does) should then cover distros we do not, or do not yet, ship for

[zeha]

ISTM all these commands want && chaining for resilience, but this is not a new problem

[Habbie]

agreed. Would make sense as a separate commit if we're touching all this anyway.

[Habbie]

test builds:

• auth
• rec
• dnsdist

[mind04]

Maybe not for this pull, but without el7 is is also possible to replace yum (deprecated) by dnf

[Habbie]

rerun for dnsdist after a fix