dockeralpine-linuxlibressl

alpine:3.14 docker libtls.so.20 conflict

So I am running into an error with the latest docker build from alpine. alpine:3.14.0 was released about a day ago and was trying to install libressl and libressl-dev and both seem to fail with the error below. My work around at the moment was to build using the alpine:3.12.0 as 3.12.0 seems to not have libretls installed. Although I would like to know how to fix this. I tried to remove libretls but that didn't work (error also below). Thanks

$ docker -v
Docker version 20.10.6, build 370c289
$ docker run --rm -it alpine /bin/ash
/ # apk add libressl-dev
fetch https://dl-cdn.alpinelinux.org/alpine/v3.14/main/x86_64/APKINDEX.tar.gz
fetch https://dl-cdn.alpinelinux.org/alpine/v3.14/community/x86_64/APKINDEX.tar.gz
(1/5) Installing libressl3.3-libcrypto (3.3.3-r0)
(2/5) Installing libressl3.3-libssl (3.3.3-r0)
(3/5) Installing libressl3.3-libtls (3.3.3-r0)
ERROR: libressl3.3-libtls-3.3.3-r0: trying to overwrite usr/lib/libtls.so.20 owned by libretls-3.3.3-r0.
ERROR: libressl3.3-libtls-3.3.3-r0: trying to overwrite usr/lib/libtls.so.20.0.3 owned by libretls-3.3.3-r0.
(4/5) Installing pkgconf (1.7.4-r0)
(5/5) Installing libressl-dev (3.3.3-r0)
Executing busybox-1.33.1-r2.trigger
1 error; 41 MiB in 19 packages
/ #
/ # apk info libretls
libretls-3.3.3-r0 description:
port of libtls from libressl to openssl

libretls-3.3.3-r0 webpage:
https://git.causal.agency/libretls/

libretls-3.3.3-r0 installed size:
84 KiB
/ #
/ # apk del libretls
WARNING: Ignoring https://dl-cdn.alpinelinux.org/alpine/v3.14/main: No such file or directory
WARNING: Ignoring https://dl-cdn.alpinelinux.org/alpine/v3.14/community: No such file or directory
World updated, but the following packages are not removed due to:
  libretls: busybox alpine-baselayout apk-tools

OK: 6 MiB in 14 packages
/ # exit
Solution

  • this is the upstream issue. Downgrading to alpine 3.13 works for now until the issue is fixed. Normally docker images support fixed alpine versions (thanks to MrGlass comment). For example

    python:3-alpine -> python:3-alpine3.13
php:7.4-fpm-alpine -> php:7.4-fpm-alpine3.13