Workaround for #8120: "Unable to use packer with distroless base images"

[hc-github-team-packer]

This issue was originally opened by @mprzybylski in hashicorp/packer#11283 and has been migrated to this repository. The original issue description is below.

---

Hello,

I took @SwampDragons up on her suggestion in issue #8120 to "tinker and can figure out how to make (distroless images) work":

• Start from one of the distroless "debug" images. These are identical to the base images except that they have busybox installed.
• Change the run_command for the docker source to ["-d", "-i", "-t", "--entrypoint=/busybox/sh", "--", "{{.Image}}"]
• Create a symlink from /busybox/sh to /bin/sh to make shell provisioners work:

  provisioner "shell-local"{
    inline = ["docker exec ${build.ID} ln -s /busybox/sh /bin/sh"]
  }
  

• Optional: run a shell-local, docker-exec-hack provisioner to delete the /busybox directory after all other provisioning is complete:

  provisioner "shell-local" {
    only   = ["docker.ebpf_sensor"]
    inline = ["docker exec ${build.ID} rm -rf /bin/sh /busybox"]
  }
  

Hope this helps!

-Mike Przybylski