netavark (exit code 1): setns: IO error: Operation not permitted (os error 1) during podman build.

[quixoticaxis]

I have a simple .Net application, and two containerfiles.

The first one:

FROM mcr.microsoft.com/dotnet/sdk:8.0 AS build-env
WORKDIR /SimpleApplication
COPY . ./
RUN dotnet restore
ENTRYPOINT ["dotnet", "restore"]

This fails when trying to build the image with

STEP 4/5: RUN dotnet restore
error running container: did not get container start message from parent: EOF
Error: building at STEP "RUN dotnet restore": netavark (exit code 1): setns: IO error: Operation not permitted (os error 1)

The second one:

FROM mcr.microsoft.com/dotnet/sdk:8.0 AS build-env
WORKDIR /SimpleApplication
COPY . ./
ENTRYPOINT ["dotnet", "restore"] # or ["dotnet", "run"] which would implicitly call restore when building the application

This builds and runs the restore command fine.

I'm probably missing something, but how can I enable network access during image build?

Running podman remote on Windows that connects to podman service on Ubuntu VM:

Client: Podman Engine
Version: 5.0.3
API Version: 5.0.3
Go Version: go1.22.3
Git Commit: d08315d
Built: Fri May 10 21:02:40 2024
OS/Arch: windows/amd64

Server: Podman Engine
Version: 4.3.1
API Version: 4.3.1
Go Version: go1.21.1
Built: Thu Jan 1 03:00:00 1970
OS/Arch: linux/amd64

[quixoticaxis]

If I add --network host, everything works, but it looks like an overkill. I initially assumed that the default slirp4netns should work.