image-rs: Add cargo build for multiarch

[stevenhorsman]

• Add building image-rs on s390x and powerpc64le
  Note: At the moment this will probably fail with:

error: failed to run custom build command for `ring v0.16.20`

Caused by:
  process didn't exit successfully: `/root/guest-components/target/debug/build/ring-f931d4c26d8deee2/build-script-build` (exit status: 101)
  --- stderr
  thread 'main' panicked at /root/.cargo/registry/src/index.crates.io-6f17d22bba15001f/ring-0.16.20/build.rs:358:10:
  called `Option::unwrap()` on a `None` value
  note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

whilst we wait for #422 to get fixed, so we shouldn't merge it until after that is fixed

[ChengyuZhu6]

Hi Steve. #422 is fixed by @Xynnn007 . And it works on the guest pull PR https://github.com/kata-containers/kata-containers/actions/runs/8242824012/job/22542388463?pr=8484.

[stevenhorsman]

Hi Steve. #422 is fixed by @Xynnn007 . And it works on the guest pull PR https://github.com/kata-containers/kata-containers/actions/runs/8242824012/job/22542388463?pr=8484.

Great - I've rebased, so we'll see if this is passes now 🤞

[stevenhorsman]

We're getting ssl related errors on s390x, which I have seen locally before as well, so as directed in the error:

 Make sure you also have the development packages of openssl installed.
  For example, `libssl-dev` on Ubuntu or `openssl-devel` on Fedora.

I'm trying adding libssl-dev as a dependency

[stevenhorsman]

It doesn't seem to be working and it was previously, so maybe something in the stack has changed things?

[Xynnn007]

It doesn't seem to be working and it was previously, so maybe something in the stack has changed things?

Oh. There is actually a hidden problem. openssl does not support cross-compilation in rust. The logic code in image-rs does not reference openssl, but it is used in the unit test, so the cargo test here cannot be built successfully. Let me fix this in another PR and you can rebase the code. hopefully it works.

[Xynnn007]

#501

[stevenhorsman]

We're now failing with:

error: test failed, to rerun pass `-p image-rs --lib`
Error: test failed, to rerun pass `-p image-rs --lib`
Caused by:
  could not execute process `/home/runner/work/guest-components/guest-components/target/s390x-unknown-linux-gnu/debug/deps/image_rs-594bc804859e5604` (never executed)

Caused by:
  Exec format error (os error 8)

I guess this was silly of me to try and run tests against a different platform binaries, so I could switch this to just a cargo build to ensure that it compiles, unless anyone has a better suggestion?

[Xynnn007]

I guess this was silly of me to try and run tests against a different platform binaries, so I could switch this to just a cargo build to ensure that it compiles, unless anyone has a better suggestion?

Makes sense. Once we have a s390x test machine, we can do the test. :P

[stevenhorsman]

Makes sense. Once we have a s390x test machine, we can do the test. :P

We do have an s390x test-runner in the CoCo organisation, so that might be a possibility. \cc @BbolroC

[BbolroC]

Makes sense. Once we have a s390x test machine, we can do the test. :P

We do have an s390x test-runner in the CoCo organisation, so that might be a possibility. \cc @BbolroC

Yeah, we can use the current s390x runner for this.

[stevenhorsman]

All checks are passing now, so I've moved this out of draft. Thanks so much Ding for removing the blockers on this.

[ChengyuZhu6]

LGTM Thanks @stevenhorsman