Fix tests on non-x86_64 architectures

[jnovy]

Make busybox binary download architecture-aware to fix test failures on aarch64 and ppc64le. Previously, tests hardcoded an x86_64 binary URL which caused "Exec format error" on other architectures.

The fix detects the system architecture and selects the appropriate busybox binary from busybox.net, with support for x86_64, aarch64, ppc64le, i686, and a fallback for other architectures.

Fixes: #610

[ricardobranco777]

It does solve the busybox issue but we have other failures:

• aarch64: https://openqa.opensuse.org/tests/5355651
• ppc64le: https://openqa.opensuse.org/tests/5355652
• x86_64: https://openqa.opensuse.org/tests/5355653 (which is weird as it passed here https://openqa.opensuse.org/tests/5355489)

Note: We're backporting these patches to v2.1.13: 579, 597, 602, 603, 604, 605, 611

Given that busybox.net is sometimes down, we'll use this workaround instead:

sudo zypper in busybox-static
mkdir /tmp/conmon-test-images
cp /usr/bin/busybox-static /tmp/conmon-test-images/

[ricardobranco777]

Given that busybox.net is sometimes down, we'll use this workaround instead:

sudo zypper in busybox-static
mkdir /tmp/conmon-test-images
cp /usr/bin/busybox-static /tmp/conmon-test-images/

This workaround doesn't work. For some reason we need an older BusyBox. https://openqa.opensuse.org/tests/5355733

[ricardobranco777]

Careful. I'm getting this on ppc64le:

# ./busybox-powerpc64 
-bash: ./busybox-powerpc64: cannot execute binary file: Exec format error

Also, downloads take an awful lot of time.

[jankaluza]

This code is fragile in general. If you kill the tests while it's downloading, the broken busybox file can end up on fs and it never gets redownloaded until you remove that broken busybox binary. That was something I also wanted to fix one day in the future :-).

Maybe that might be the reason for broken binary @ricardobranco777 sees?

[ricardobranco777]

Maybe that might be the reason for broken binary @ricardobranco777 sees?

No. I tried this manually on a ppc64le host and it fails.

[jnovy]

Hmm, thinking more about all this - there doesn't seem any particular reason why we use busybox and it's been unreliable for some time. It's time to switch to something else. I'd propose UBI as the registry from which it's pulled from is rarely down and it's properly tested and functional.

[jnovy]

I will create a new PR, let's skip this one.