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teleivo / diskmon

Cheap monitoring for mount points
MIT License
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Sign of life #2

Open JaySunSyn opened 2 years ago

JaySunSyn commented 2 years ago

It would be nice if diskmon could send a sign of life at a specified time and day of the week (go cron format?).

Example: Every Saturday at 8 AM

The payload could also include the current disk usage.

JaySunSyn commented 2 years ago

Actually, already kind of possible by running a 2nd process with -limit 0

teleivo commented 2 years ago

Do I understand the issue correctly: when diskmon is running for a while without any disks reaching their limit it feels uncertain if diskmon is even running. Correct?

Maybe we can come up with an implementation that solves that but is even simpler. For simplicity we have not implemented the usage check using the cron syntax but using an interval in minutes. So what if we add a flag so that a usage notification is sent regardless of whether a limit has been reached on every x'th check.

like so

./diskmon -basedir /mnt -limit 75 -interval 30 -x 48

The above checks disk usage every 30 minutes and will send a notification every 30 minutes only if a disk has reached the limit. Otherwise, it will send one usage report per day. Since 48 * 30 minutes = 24h

I need to put some thought into finding better name than x :joy:

JaySunSyn commented 2 years ago

Thanks for the reply 🥦

Yes, you understand correctly :)

Specifying a weekday & time would be ideal. I'd then do it every Friday at 8 AM. And I know all diskmon processes need to dispatch a sign of life at that day & time. https://pkg.go.dev/github.com/robfig/cron#hdr-CRON_Expression_Format