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414edd44c2
diskimage-builder/elements/architecture-emulation-binaries
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loki 414edd44c2 Provide ability to build images for other architectures 
Adds binaries specified by user to chroot environment
allowing to build  images on amd64,i386,armhf,arm64
architectures.
Closes-Bug: #1332458
Change-Id: If6e63a472ee85559b93b5e6b96d9c3ddcf7bcc98
2014-09-16 22:50:17 +05:30
..
cleanup.d Provide ability to build images for other architectures 2014-09-16 22:50:17 +05:30
extra-data.d Provide ability to build images for other architectures 2014-09-16 22:50:17 +05:30
README.md Provide ability to build images for other architectures 2014-09-16 22:50:17 +05:30

README.md

This element enables execution for different architectures

When building an image for an architecture that the host machine can not execute, we need to chroot into the image to execute code, and if the host architecture does not match, we need to emulate the instructions.

This element does the following:

  • copies the binary file into chroot /usr/bin environment. Binary file is chosen based on host architecture and image architecture the user is trying to build.

    If an image we are building for an architecture is not the host architecture, install tools provided by qemu-user-static (which needs to be installed) to allow us to run commands inside the building image.

    This is tested on amd64/i386 architecture to build armhf and arm64 ubuntu cloud images.