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<blockquote style="position: relative; padding-left: 55px;"><section><a href="https://degrowth.social/users/yala/statuses/113205022853242700">jon ⚝ (yala@degrowth.social)'s status on Saturday, 28-Sep-2024 20:33:24 JST</a><a href="https://degrowth.social/@yala" title="yala@degrowth.social"><img src="https://gnusocial.jp/avatar/180231-48-20240308140844.webp" width="48" height="48" alt="jon ⚝" style="position: absolute; left: 0; top: 0;">jon ⚝</a><div><a href="https://fosstodon.org/@postmarketOS/113203758890784164" rel="in-reply-to">in reply to</a><ul><li></ul></div></section><article><p><a href="https://fosstodon.org/@postmarketOS">@postmarketOS</a> I was very surprised recently that Alpine's musl resolves DNS differently than glibc.</p><p>- <a href="https://biriukov.dev/docs/resolver-dual-stack-application/5-getaddrinfo-from-musl-libc/" rel="nofollow noreferrer">https://biriukov.dev/docs/resolver-dual-stack-application/5-getaddrinfo-from-musl-libc/</a><br>- <a href="https://jvns.ca/blog/2022/02/23/getaddrinfo-is-kind-of-weird/" rel="nofollow noreferrer">https://jvns.ca/blog/2022/02/23/getaddrinfo-is-kind-of-weird/</a><br>- <a href="https://wiki.musl-libc.org/functional-differences-from-glibc.html#Name-Resolver/DNS" rel="nofollow noreferrer">https://wiki.musl-libc.org/functional-differences-from-glibc.html#Name-Resolver/DNS</a><br>- <a href="https://martinheinz.dev/blog/92" rel="nofollow noreferrer">https://martinheinz.dev/blog/92</a><br>- <a href="https://purplecarrot.co.uk/post/2021-09-04-does_alpine-resolve_dns_properly/" rel="nofollow noreferrer">https://purplecarrot.co.uk/post/2021-09-04-does_alpine-resolve_dns_properly/</a></p><p>In our case it breaks the search domain for Docker containers which would like to discover each other via DNS. This limitation of the search domain might also apply to mobile devices on postmarketOS in networks that set one.</p></article><footer><a rel="bookmark" href="https://gnusocial.jp/conversation/3741841#notice-7325735">In conversation</a><time datetime="2024-09-28T20:33:24+09:00" title="Saturday, 28-Sep-2024 20:33:24 JST">about 8 months ago</time> <span>from <span><a href="https://degrowth.social/@yala/113205022853242700" rel="external" title="Sent from degrowth.social via ActivityPub">degrowth.social</a></span></span><a href="https://degrowth.social/@yala/113205022853242700">permalink</a><h4>Attachments</h4><ol><li><article><header><div>No result found on File_thumbnail lookup.</div><h5><a href="https://biriukov.dev/docs/resolver-dual-stack-application/5-getaddrinfo-from-musl-libc/">getaddrinfo() from musl libc</a></h5><div></div></header><div>5. getaddrinfo() from musl libc # musl libc is a lightweight, fast, and simple implementation of the standard C library (libc) that aims for efficiency, standards compliance, and security.
It gained popularity following its extensive use in Alpine Linux, a security-oriented, lightweight Linux distribution often used as a base image for Docker containers.
However, it is crucial for us to understand that musl libc incorporates a completely new resolver code that behaves differently in certain situations.</div><footer></footer></article></li><li><article><header><div>No result found on File_thumbnail lookup.</div><h5><a href="https://jvns.ca/blog/2022/02/23/getaddrinfo-is-kind-of-weird/">Some things about getaddrinfo that surprised me</a></h5><div> from <span>Julia Evans</span></div></header><div>Some things about getaddrinfo that surprised me</div><footer></footer></article></li><li><article><header><div>No result found on File_thumbnail lookup.</div><h5><a href="https://wiki.musl-libc.org/functional-differences-from-glibc.html#Name-Resolver/DNS">musl libc - Functional differences from glibc</a></h5><div></div></header><div></div><footer></footer></article></li><li><article><header><div>No result found on File_thumbnail lookup.</div><h5><a href="https://martinheinz.dev/blog/92">Why I Will Never Use Alpine Linux Ever Again</a></h5><div></div></header><div>Nowadays, Alpine Linux is one of the most popular options for container base images. Many people (maybe including you) use it for anything and everythi...</div><footer></footer></article></li><li><label><a rel="external" href="https://gnusocial.jp/attachment/3232691">Untitled attachment</a></label><br></li></ol></footer></blockquote>

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jon ⚝ (yala@degrowth.social)'s status on Saturday, 28-Sep-2024 20:33:24 JSTjon ⚝
in reply to
- postmarketOS
@postmarketOS I was very surprised recently that Alpine's musl resolves DNS differently than glibc.
- https://biriukov.dev/docs/resolver-dual-stack-application/5-getaddrinfo-from-musl-libc/
- https://jvns.ca/blog/2022/02/23/getaddrinfo-is-kind-of-weird/
- https://wiki.musl-libc.org/functional-differences-from-glibc.html#Name-Resolver/DNS
- https://martinheinz.dev/blog/92
- https://purplecarrot.co.uk/post/2021-09-04-does_alpine-resolve_dns_properly/
In our case it breaks the search domain for Docker containers which would like to discover each other via DNS. This limitation of the search domain might also apply to mobile devices on postmarketOS in networks that set one.
In conversationabout 8 months ago from degrowth.socialpermalink
Attachments
1. No result found on File_thumbnail lookup.
  getaddrinfo() from musl libc
  5. getaddrinfo() from musl libc # musl libc is a lightweight, fast, and simple implementation of the standard C library (libc) that aims for efficiency, standards compliance, and security. It gained popularity following its extensive use in Alpine Linux, a security-oriented, lightweight Linux distribution often used as a base image for Docker containers. However, it is crucial for us to understand that musl libc incorporates a completely new resolver code that behaves differently in certain situations.
2. No result found on File_thumbnail lookup.
  Some things about getaddrinfo that surprised me
  from Julia Evans
  Some things about getaddrinfo that surprised me
3. No result found on File_thumbnail lookup.
  musl libc - Functional differences from glibc
4. No result found on File_thumbnail lookup.
  Why I Will Never Use Alpine Linux Ever Again
  Nowadays, Alpine Linux is one of the most popular options for container base images. Many people (maybe including you) use it for anything and everythi...
5. Untitled attachment

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