pkg/bpftrace: push empty image to dockerhub

[christoph-zededa]

this way we can work around the fact that get-deps does not build dependencies architecture specific and therefore tries to build bpftrace for riscv64
with this change an empty image will be pulled and put into the debug container on riscv64

other architectures stay the same as before

This fixes #4018

[christoph-zededa]

I changed how bpftrace-aotrt and it's dependencies get copied into the final container; instead of copying only it into /, now it gets copied in /bpftrace and the build environment is kept. This enables other users of lfedge/eve-bpftrace to build something and use bpftrace to create bpftrace-code for eve.

[rene]

I changed how bpftrace-aotrt and it's dependencies get copied into the final container; instead of copying only it into /, now it gets copied in /bpftrace and the build environment is kept. This enables other users of lfedge/eve-bpftrace to build something and use bpftrace to create bpftrace-code for eve.

@christoph-zededa , but that means when you include the container into the rootfs the build environment will be included as well... is that intentional? What will be the difference in the final container's size?

[christoph-zededa]

@christoph-zededa , but that means when you include the container into the rootfs the build environment will be included as well... is that intentional? What will be the difference in the final container's size?

this container will be included like this then:

COPY --from=bpftrace /bpftrace /

in #4018

So I don't think everything will be included in the rootfs image.

[rene]

@christoph-zededa , but that means when you include the container into the rootfs the build environment will be included as well... is that intentional? What will be the difference in the final container's size?

this container will be included like this then:

COPY --from=bpftrace /bpftrace /

in #4018

So I don't think everything will be included in the rootfs image.

Ha, ok, yeah, all good, in the example above it will only copy contents of /bpftrace....

[christoph-zededa]

I changed how bpftrace-aotrt and it's dependencies get copied into the final container; instead of copying only it into /, now it gets copied in /bpftrace and the build environment is kept. This enables other users of lfedge/eve-bpftrace to build something and use bpftrace to create bpftrace-code for eve.

Now only bpftrace is kept in order to minimize the amount of bytes that have to be downloaded.