Module docker_snapshot_resume 

Steps around the docker commit of a snapshot resume (issue #224):

• --snapshot-prepare <command> runs in the stopped original before the commit: docker start, docker exec ... sh -c <command>, and always a docker kill afterwards. Starting the original runs its own command again, so this is only for containers whose start is known to be safe.
• Progress lines while docker commit runs, which prints nothing itself.
• --remove-original-after <seconds>: remove the stopped original only if the replacement is still running after the delay.

Structs

SnapshotReporter

Where the snapshot steps report: the execution log and notify.

Functions

commit_with_progress

Run docker commit and report the elapsed time every interval.

format_elapsed

Format a duration the way the progress lines print it: “45s”, “12 min”.

progress_interval_seconds

remove_original_after

Remove the stopped original once the replacement has survived the delay. Returns the note describing what happened.

run_snapshot_prepare

Run --snapshot-prepare in the stopped original. A failure is reported and the snapshot continues with the files as they are.