From 6b7486531d36719a93f739a52f814881834285dc Mon Sep 17 00:00:00 2001 From: Franck Cuny Date: Tue, 13 Apr 2021 19:39:30 -0700 Subject: doc: update README --- README.org | 15 +++++++++++++++ 1 file changed, 15 insertions(+) create mode 100644 README.org (limited to 'README.org') diff --git a/README.org b/README.org new file mode 100644 index 0000000..53cee39 --- /dev/null +++ b/README.org @@ -0,0 +1,15 @@ +#+TITLE: containerd-to-vm +#+AUTHOR: franck cuny + +* What +A recent [[https://fly.io/blog/docker-without-docker/][article]] from the team at [[https://fly.io][fly.io]] described how they build VMs for firecracker from the docker image provided by their customers. They outline the following steps: + +1. Pull the matching container from the registry. +2. Create a loop device to store the container's filesystem on. +3. Unpack the container (in this case, using Docker's Go libraries) into the mounted loop device. +4. Create a second block device and inject our init, kernel, configuration, and other goop into. +5. Track down any persistent volumes attached to the application, unlock them with LUKS, and collect their unlocked block devices. +6. Create a TAP device, configure it for our network, and attach BPF code to it. +7. Hand all this stuff off to Firecracker and tell it to boot . + +As I've been interested in playing with both containerd's API and firecracker, I thought it would be a good opportunity to try to implement this. -- cgit 1.4.1