Dockerise ASP.NET Core app with Alpine image

[javiercn]

---

Issue moved from dotnet/aspnetcore#50399

• Please respond to @lonix1.

---

From @lonix1 on Tuesday, August 29, 2023 3:46:57 PM

I originally asked on SO without resolution. I assume this is not working as intended.

---

I want my dockerised ASP.NET Core 7 app based on Alpine (not ASP.NET Core Runtime).

MyApp.csproj contains:

<PublishSingleFile>true</PublishSingleFile>
<RuntimeIdentifier>linux-musl-x64</RuntimeIdentifier>
<IncludeNativeLibrariesForSelfExtract>true</IncludeNativeLibrariesForSelfExtract>  <!-- tried with and without this -->

Dockerfile contains:

FROM alpine

But when I start a container, I get:

Error relocating /dist/MyApp: __cxa_pure_virtual: symbol not found
Error relocating /dist/MyApp: __cxa_pure_virtual: symbol not found
Error relocating /dist/MyApp: __cxa_pure_virtual: symbol not found
Error relocating /dist/MyApp: _ZTVN10__cxxabiv121__vmi_class_type_infoE: symbol not found
Error relocating /dist/MyApp: _ZTVN10__cxxabiv121__vmi_class_type_infoE: symbol not found
Error relocating /dist/MyApp: _ZTVN10__cxxabiv121__vmi_class_type_infoE: symbol not found

It works with the normal image (i.e. FROM mcr.microsoft.com/dotnet/aspnet).

The docs imply that with the correct RID (linux-musl-x64), this should work. But obviously the generated binary is missing native dependencies.

[javiercn]

---

Issue moved from dotnet/aspnetcore#50399

• Please respond to @lonix1.

---

From @lonix1 on Wednesday, August 30, 2023 1:26:31 AM

UPDATE:

The answers in that SO thread explain that the runtime-deps image is needed for various alpine dependencies.

So this is working properly, but the documentation needs some polish.

Somewhere in [1] or [2] it should mention that the self-contained single-file app cannot be run in alpine directly, but can be run in runtime-deps.

Could you possibly move this to the docs repo?

[javiercn]

---

Issue moved from dotnet/aspnetcore#50399

• Please respond to @javiercn.

---

From @javiercn on Wednesday, August 30, 2023 10:24:32 AM

@lonix1 thanks for contacting us.

This is more likely a question for the dotnet/docker repository since they centrally manage all images.

@richlander thoughts?

[mthalman]

This was already answered here: https://stackoverflow.com/questions/77000895/dockerise-asp-net-core-app-with-alpine-image