If web proxy is not up / takes too long to start, initial challenge will not be retried until the next day

[horazont]

Problem description: If the web proxy takes long to start (e.g. on a Pi) or fails to start initially and manual admin intervention is required (also on a Pi if it is really overloaded with I/O on a slow SD card), the initial challenge will fail because the web server is offline.

The container then exits and restarts after an hour, but anacron will only re-run the tasks the next day as it still has spool files.

Workaround: docker exec -it snikket-certs rm /var/spool/anacron/cron.daily && docker restart snikket-certs to immediately restart the challenge