overlaybd.md

Lazy-pulling using OverlayBD Snapshotter

⚡ Requirement	nerdctl >= 0.15.0

OverlayBD is a remote container image format base on block-device which is an open-source implementation of paper "DADI: Block-Level Image Service for Agile and Elastic Application Deployment. USENIX ATC'20".

See https://github.com/containerd/accelerated-container-image to learn further information.

Enable lazy-pulling for nerdctl run

• Install containerd remote snapshotter plugin (overlaybd) from https://github.com/containerd/accelerated-container-image/blob/main/docs/BUILDING.md

• Add the following to /etc/containerd/config.toml:

[proxy_plugins]
  [proxy_plugins.overlaybd]
    type = "snapshot"
    address = "/run/overlaybd-snapshotter/overlaybd.sock"

• Launch containerd and overlaybd-snapshotter

• Run nerdctl with --snapshotter=overlaybd

nerdctl run --net host -it --rm --snapshotter=overlaybd registry.hub.docker.com/overlaybd/redis:6.2.1_obd

For more details about how to build overlaybd image, please refer to accelerated-container-image conversion tool.