containers
- Record MQTT topics to a MikroTik router's SSD
A mosquitto_sub container on RouterOS 7.24 that appends every message on chosen MQTT topics to the router's SSD, one file per UTC day.
- Simulate a cold start without rebooting or drop_caches
Evict one file from the Linux page cache as a normal user with posix_fadvise, prove it with fincore, and start a container that reads it cold.
- Stop docker compose from orphaning anonymous volumes
Run docker compose rm -fsv, then down, in the script's EXIT trap: anonymous volumes go with their containers, named volumes stay.
- Docker's image age is somebody else's clock
A Docker cleanup aged images by their build date. 71 of the 93 images it removed had been pulled within the month.
- Six gotchas deep in RouterOS containers
RouterOS containers use the same vocabulary as Docker. The meanings diverge in six specific, time-consuming ways.
- 572,000 domains and the router barely notices
Network-wide ad blocking on a MikroTik hAP ax3 with blocky in a container — no Pi-hole, no separate box, and a DNS trick that defeats client DoH bypass.