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This patch adds a new "prune" event type to indicate that pruning of a resource type completed. This event-type can be used on systems that want to perform actions after resources have been cleaned up. For example, Docker Desktop performs an fstrim after resources are deleted (https://github.com/linuxkit/linuxkit/tree/v0.7/pkg/trim-after-delete). While the current (remove, destroy) events can provide information on _most_ resources, there is currently no event triggered after the BuildKit build-cache is cleaned. Prune events have a `reclaimed` attribute, indicating the amount of space that was reclaimed (in bytes). The attribute can be used, for example, to use as a threshold for performing fstrim actions. Reclaimed space for `network` events will always be 0, but the field is added to be consistent with prune events for other resources. To test this patch: Create some resources: for i in foo bar baz; do \ docker network create network_$i \ && docker volume create volume_$i \ && docker run -d --name container_$i -v volume_$i:/volume busybox sh -c 'truncate -s 5M somefile; truncate -s 5M /volume/file' \ && docker tag busybox:latest image_$i; \ done; docker pull alpine docker pull nginx:alpine echo -e "FROM busybox\nRUN truncate -s 50M bigfile" | DOCKER_BUILDKIT=1 docker build - Start listening for "prune" events in another shell: docker events --filter event=prune Prune containers, networks, volumes, and build-cache: docker system prune -af --volumes See the events that are returned: docker events --filter event=prune 2020-07-25T12:12:09.268491000Z container prune (reclaimed=15728640) 2020-07-25T12:12:09.447890400Z network prune (reclaimed=0) 2020-07-25T12:12:09.452323000Z volume prune (reclaimed=15728640) 2020-07-25T12:12:09.517236200Z image prune (reclaimed=21568540) 2020-07-25T12:12:09.566662600Z builder prune (reclaimed=52428841) Signed-off-by: Sebastiaan van Stijn <github@gone.nl> |
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| drivers | ||
| local | ||
| mounts | ||
| service | ||
| testutils | ||
| volume.go | ||