RaspberryPi compilation command example GOARCH=arm GOARM=7 go build -o watcher watcher.go

Usage:

  -d	Daemonize gowatcher
  -s string
    	send signal to the daemon
		quit — graceful shutdown
		stop — fast shutdown
  -t
    	Test mode - print test phrase without run all modules
  -version
        Print version info

Makefile shortcuts:

    make run        run program (<Ctrl+C> to exit)
    make run_test   run program in test mode (print "It's work" phrase and shutdown)
    make build      build program (with native arch)
    make build_rpi  build program for raspberry pi arch
    make tests      run tests

How does it work?

It send to receivers (slack or telegram) messages periodically, like this:

*raspberrypi* *uptime* says:
 17:41:11 up 18 days, 23:16,  3 users,  load average: 0,31, 0,39, 0,37

or this

*raspberrypi* *who* says:
New user detected: username       pts/1        2018-08-18 17:39 00:02       19165 (192.168.0.245)

Now implemented 4 handlers (watchers): w, who, df, uptime. Each one run self command and send the result to receivers.

How to configure it?

1. Copy config.json.dist to folder with program cp config.json.dist config.json
2. Modify the configuration vim config.json
3. Restart the app watcher -s stop && watcher -d

Planned features:

1. In case one receiver is not available (for example, telegram is blocked) then other receivers must report this.
2. ✔️ Each watcher has self time of loop in settings
3. ✔️ Watchers supports some args in settings
4. df watcher can report about critical free size of partial
5. Exists load average graph which published to receivers periodically
6. Released email receiver with customizable watchers
7. Hot reconfigure app
8. ✔️ Min & Max loop constrains
9. Add system log watcher for app errors