this post was submitted on 22 Jul 2023
18 points (95.0% liked)

Self Hosted - Self-hosting your services.

14471 readers
49 users here now

A place to share alternatives to popular online services that can be self-hosted without giving up privacy or locking you into a service you don't control.

Rules

Important

Cross-posting

If you see a rule-breaker please DM the mods!

founded 4 years ago
MODERATORS
 

I suffer several micro cuts a day since a couple weeks. I'd like to monitor these cuts to help diagnose the issue with my ISP.

Is there any docker image that allows to do this ? I only found internet speed monitoring.

you are viewing a single comment's thread
view the rest of the comments
[–] [email protected] 2 points 2 years ago* (last edited 2 years ago) (1 children)

Depends on how much you want to set up. For my purposes, I just check for connectivity every minute, and record true or false as a new row in a sqlite database if there is connectivity.

This is what I use on my raspberry pi,

#!/usr/bin/env python3
from datetime import datetime
import sqlite3
import socket
from pathlib import Path

try:
    host = socket.gethostbyname("one.one.one.one")
    s = socket.create_connection((host, 80), 2)
    s.close()
    connected = True
except:
    connected = False
timestamp = datetime.now().isoformat()

db_file = Path(__file__).resolve().parent / 'Database.sqlite3'
conn = sqlite3.connect(db_file)
curs = conn.cursor()
curs.execute('''CREATE TABLE IF NOT EXISTS checks (id INTEGER PRIMARY KEY AUTOINCREMENT, timestamp TEXT, connected INTEGER)>
curs.execute('''INSERT INTO checks (timestamp, connected) VALUES (?, ?);''', (timestamp, 1 if connected else 0))
conn.commit()
conn.close()

and I just have a crontab entry * * * * * ~/connectivity_check/check.py >/dev/null 2>&1 to run it every minute.

Then I just check for recent disconnects via:

$ sqlite3 ./connectivity_check/Database.sqlite3 'select count(*) from checks where connected = 0 order by timestamp desc;'

Obviously, it's not as full-featured as something with configurable options or a web UI etc, but for my purposes, it does exactly what I need with absolutely zero overhead.

[–] [email protected] 3 points 2 years ago (1 children)

That's not exactly the solution I was looking for, but that was very instructive. Thank you.

[–] [email protected] -1 points 2 years ago* (last edited 2 years ago)

Ah I see you mentioned the cuts are only a few seconds long. This wouldn't catch that very well.

If you have a server outside of your network you could simply hold open a TCP connection and report when it breaks, but I'll admit at that point it's outside of what I've had to deal with.