Add Alpine 3.17 variant

[jnoordsij]

This PR provides the latest Alpine version (3.17, see https://alpinelinux.org/posts/Alpine-3.17.0-released.html) and removes the oldest one (3.15).

Alpine 3.17 variant is only added for PHP versions with OpenSSL support (i.e. PHP >= 8.1), see also comment below.

Based on #1298.

[jnoordsij]

Seems like this breaks with older PHP versions due to the update to OpenSSL 3.0 as default version. I will try to look into this later.

[J0WI]

see also:

• https://pkgs.alpinelinux.org/package/edge/community/x86_64/openssl1.1-compat
• [Bug] Nextcloud Encryption breaks with OpenSSL 3.x due to legacy RC4 usage nextcloud/server#32003

[jnoordsij]

Hmmm this seems to be more tricky than I anticipated. The curl-dev package requires openssl-dev>3.0 in Alpine 3.17, so the build still breaks with the openssl1.1-compat package.

I figured there are at least two ways to solve this problem:

• Do no update the Alpine versions for PHP versions < 8.1. For 7.4 this makes a lot of sense, since it will reach EOL in 4 days and will be removed here after that. For 8.0, which reaches EOL in approx. 1 year, this would mean that only Alpine 3.16 (or maybe leave 3.15 then?) will be supported.
• Manually install an old curl-dev version by adding echo 'http://dl-cdn.alpinelinux.org/alpine/v3.16/main' >> /etc/apk/repositories; and then pinning the version on install. This feels a bit hacky and is probably unwanted.

I'll wait for a maintainer to come around and discuss these and possible other solutions.

Update 25/11: I rebased this branch onto #1349 here, to make things slightly easier. It would still require some fix for the 8.0 variant.

[tianon]

Thank you for starting the work here and finding the bodies! 😄

IMO we should "solve" this by only supporting Alpine 3.17+ for versions which support OpenSSL 3+ (no strong opinion either way from me on whether we drop 3.15 from all or just from those that get 3.17, but definitely no more than two Alpine versions for any given PHP version). 🚀

I'm happy to work on the necessary conditionals for doing so if that isn't something you want to tackle. 👍

[jnoordsij]

I've gone with dropping Alpine 3.15 altogether, leaving 8.0 with a single supported Alpine variant. The git diff is a bit weird with file moves (e.g. 8.0/alpine3.15/fpm/docker-php-ext-install → 8.2-rc/alpine3.17/fpm/docker-php-ext-install), but looks like everything is working perfectly fine now.

[tianon]

Thanks!