qemu-user-static Docker image makes it easy to manage a variety of multi-architecture containers.

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Let’s look at the qemu-user-static Docker image in more detail.

What is qemu-user-static Docker image

The purpose of multiarch/qemu-user-static is to allow QEMU [1] and binfmt misc [2] to execute different multi-architecture containers. qemu-user-static allows QEMU [1] and binfmt_misc [2] to run different multi-architecture containers.

Usage

multiarch/qemu-user-static images

The Docker Hub container repository manages multiarch/qemu-user-static images. The images have the tags listed below.

1. Firstly, multiarch/qemu-user-static images.
2. Then, multiarch/qemu-user-static:$version images.
3. Then, multiarch/qemu-user-static:$from_arch-$to_arch images.
4. multiarch/qemu-user-static:$from_arch-$to_arch-$version images.
5. Then, multiarch/qemu-user-static:$to_arch images.
6. Then, multiarch/qemu-user-static:$to_arch-$version images.
7. Finally, multiarch/qemu-user-static:register images.

Variables

• $version: Based on the QEMU version.
• $from_arch: Architecture of the host.
• $to_arch: Guest architecture

Description

1. The multiarch/qemu-user-static image container contains a register script for registering binfmt_misc entries as well as all of the /usr/bin/qemu-$arch-static binary files in the container. The latest version of multiarch/qemu-user-static:$version images is an alias for multiarch/qemu-user-static image.
2. multiarch/qemu-user-static:$to_arch images are aliases for multiarch/qemu-user-static:x86_64-$to_arch images, which only include the $to_arch’s /usr/bin/qemu-$to_ arch-static binary file. The latest version of multiarch/qemu-user-static:$to_arch-$version images is an alias for multiarch/qemu-user-static:$to_arch image.
3. Only the register script binfmt misc entries are present in the multiarch/qemu-user-static:register image.

multiarch/qemu-user-static and multiarch/qemu-user-static:register are images in the multiarch/qemu-user-static package. When running the container, run the register script, which registers the following types of /proc/sys/fs/binfmt_misc/qemu-$arch files for all supported processors except the current one.

The files are described in detail in the binfmt_misc manual [2]. Because the files /proc/sys/fs/binfmt_misc and /proc/sys/fs/binfmt_misc are shared between the host and the container, the register script modifies the file on the host.

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Conclusion

To sum up, our Support team went over the qemu-user-static Docker image in greater depth.