stop publishing debian7 and debian8 from 1.23.7 onwards

[v1v]

Closes #509

See

[mergify]

This pull request does not have a backport label. Could you fix it @v1v? 🙏
To fixup this pull request, you need to add the backport labels for the needed
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[dliappis]

LGTM

[v1v]

@cmacknz , what do you think? IIUC, we don't use it:

• https://github.com/elastic/beats/blob/6d6067288b360df5fdb647829303f95f47ea2e10/dev-tools/mage/crossbuild.go#L222-L246. (main)
• https://github.com/elastic/beats/blob/7.17/dev-tools/mage/crossbuild.go#L196-L226 (7.17)
• https://github.com/elastic/elastic-agent/blob/45e3abf15c0fd1a351c5820646b5bd2eff6ce46b/dev-tools/mage/crossbuild.go#L223-L253 (main)

[cmacknz]

You can get rid of debian8 for sure. 7.17 still references debian 7 but not 8 which is strange.

https://github.com/elastic/beats/blob/a69b50616b084595917635529e21901a44ed0171/dev-tools/mage/crossbuild.go#L196-L234

Let me look into if we still need this as the support matrix has been updated since those changes.

Main and 8.x are all using Debian 11.

[cmacknz]

The Linux case selecting Debian 7 is the problematic one.

	case strings.HasPrefix(platform, "linux"):
		// Use an older version of libc to gain greater OS compatibility.
		// Debian 7 uses glibc 2.13.
		tagSuffix = "main-debian7"
	}

[v1v]

Thanks for double checking, I missed the Debian 7 in 7.17, phew.

I'll change the scope for Debian 8 in this PR for now, and then we can figure out if Debian7 in a follow-up

---

[cmacknz]

From https://www.elastic.co/support/matrix

Several Beats like Packetbeat, Heartbeat, and Auditbeat claim to support Debian 8 in 7.17 with no footnotes.

For Filebeat and Metricbeat there is a footnote that we only support Debian 10 and above.

So we potentially can remove Debian 7 assuming it doesn't break compatibility with the glibc in the older RHEL releases we support. Or we can wait until 7.17.x goes EOL and do a larger removal of lots of things.

[v1v]

Although 7.17 is based on 1.22 instead of 1.23, my plan was to do that from 1.23 onwards.

Do we plan to support 1.23 in 7.17?

[v1v]

So we potentially can remove Debian 7 assuming it doesn't break compatibility with the glibc in the older RHEL releases we support. Or we can wait until 7.17.x goes EOL and do a larger removal of lots of things.

I wanted to take the opportunity to remove them before 1.24 is released, so thinking the next patch for 1.23 was a good opportunity.

No rush in what we decide to do here.

We can wait for 1.24 and remove Debian 7 and Debian 8 for that Golang version - 1.24.0 is expected to be released in the upcoming weeks.

[cmacknz]

We will probably leave 7.17 at 1.22 so that makes sense to me.

[v1v]

We will probably leave 7.17 at 1.22 so that makes sense to me.

Great, we have a plan, I'll merge this PR as is then - only after your review please

[elasticmachine]

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