Alpine Linux (for Docker images)

[markrendle]

Support for Alpine Linux has been mentioned in the past on various repositories. It's desirable because the Docker image for Alpine is under 5MB in size, compared to over 100MB for Debian 8, which is the current base for the dotnet images. Docker are looking to migrate all their official library images to Alpine.

The blocker for .NET Core has been the availability of the core dependencies on Alpine, of which the last outstanding one was LTTng, which is now in the APK testing repository for Alpine 3.5.

I'm not an expert on building .NET Core, CLI, etc, but if anybody fancies having a go at creating an Alpine build, it should be possible.

Looking at the Linux build instructions for CoreCLR, all the APT packages mentioned are available now, at least in Alpine's edge/testing repository, if not in edge/main:

APT	APK
cmake	cmake
llvm-3.5	llvm
clang-3.5	clang (appears to be 3.8)
lldb-3.6	lldb (in edge/testing)
lldb-3.6-dev	lldb-dev (in edge/testing)
libunwind8	libunwind (in edge/main)
libunwind8-dev	libunwind-dev (in edge/main)
gettext	gettext
libicu-dev	icu-dev
liblttng-ust-dev	lttng-ust-dev (in edge/testing)
libcurl4-openssl-dev	curl-dev
libssl-dev	openssl-dev
uuid-dev	util-linux-dev (seems to be where the uuid.h file lives)

And here's a list of the deps from the dotnet image with their Alpine equivalents.

APT package	APK package
libc6	libc6-compat
libcurl3	libcurl
libgcc1	libgcc
libgssapi-krb5-2	krb5-libs
libicu52	icu-libs
liblttng-ust0	lttng-ust-dev
libssl1.0.0	libssl1.0
libstdc++6	libstdc++
libunwind8	libunwind
libuuid1	libuuid
zlib1g	zlib

Right, this is where somebody points out that the only reason these dependencies have made it into Alpine is that a .NET Core team member ported them all, for precisely this reason, and I've wasted the time spent on this issue. 😞

[glennc]

See this issue: https://github.com/dotnet/coreclr/issues/917

[blackdwarf]

Hm, seems like dotnet/coreclr#917 covers the work of porting to Alpine Linux. @markrendle you ok if we close this issue?

[blackdwarf]

Closing this issue due to lack of response.

[mo-saeed]

Hello @markrendle I have this issue while using this lib icu-libs

Error loading shared library ld-linux-x86-64.so.2: No such file or directory (needed by ./bin/libcoreclr.so)
Error relocating ./bin/libcoreclr.so: __finite: symbol not found
Error relocating ./bin/libcoreclr.so: __isnan: symbol not found
Error relocating ./bin/libcoreclr.so: __finitef: symbol not found
Error relocating ./bin/libcoreclr.so: __isnanf: symbol not found
Error relocating ./bin/libcoreclr.so: pthread_attr_setaffinity_np: symbol not found
Error relocating ./bin/System.Net.Http.Native.so: __strdup: symbol not found
libicu's dependencies missing for .NET Core 3.1
Execute ./bin/installdependencies.sh to install any missing dependencies.

[mairaw]

@mo-saeed it would probably be better to open a new issue given this one was closed due to the lack of response and it's almost 5 years old.