Alpine aarch64/arm64 support

[willat8]

I notice librdkafka.redist provides Linux arm64 librdkafka.so but not alpine-librdkafka.so. It would be great to get the same for Alpine.

[grietine]

I notice librdkafka.redist provides Linux arm64 librdkafka.so but not alpine-librdkafka.so. It would be great to get the same for Alpine.

I agree. It would be valuable if this NuGet would support Alpine Arm64.

We are using Alpine image, but with amd64 architecture:
mcr.microsoft.com/dotnet/aspnet:8.0-alpine

We want to migrate to arm64 base architecture and continue using the Alpine image, but I noticed that this NuGet stopped working. Error:
System.DllNotFoundException: Failed to load the librdkafka native library

After investigating I found that there are missing dependencies for librdkafka.so in Alpine as it uses musl instead of glibc:

/app/runtimes/linux-arm64/native # ldd librdkafka.so
        /lib/ld-musl-aarch64.so.1 (0xffff89818000)
        libm.so.6 => /lib/ld-musl-aarch64.so.1 (0xffff89818000)
        libdl.so.2 => /lib/ld-musl-aarch64.so.1 (0xffff89818000)
        libpthread.so.0 => /lib/ld-musl-aarch64.so.1 (0xffff89818000)
        librt.so.1 => /lib/ld-musl-aarch64.so.1 (0xffff89818000)
        libc.so.6 => /lib/ld-musl-aarch64.so.1 (0xffff89818000)
Error relocating librdkafka.so: getcontext: symbol not found
Error relocating librdkafka.so: __getauxval: symbol not found
Error relocating librdkafka.so: makecontext: symbol not found
Error relocating librdkafka.so: setcontext: symbol not found

Switching back to the default Debian based (which has the missing packages) it works on Arm64:
mcr.microsoft.com/dotnet/aspnet:8.0

Alternative way would be to compile the librdkafka.redist by ourselves, but this doesn't seem like a viable solution in the long term.

Is there a plan to support Alpine with Arm64?

[willat8]

A workaround I am using is to install the librdkafka alpine package from edge and symlink it to the expected location. Brittle but works for now.