this post was submitted on 15 Jun 2023
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11
How would you resolve this issue: Your server's internet randomly becomes inaccessible until reboot. (Ubuntu 22.04, Netplan) (forum.stellarcastle.net)
submitted 1 year ago* (last edited 1 year ago) by [email protected] to c/[email protected]
35 comments fedilink hide all child comments
 

I've been having this issue very sporadically (sometimes a couple times a week, sometimes once a month). I'm curious as to how the more veteran folk here would try and narrow down the cause of this issue.

I can provide more info if needed!

Edit: More Info:

  • Using a static IP (no DHCP) through Netplan.
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[–] [email protected] 2 points 1 year ago (1 children)

Thanks for the suggestion. So I have the static IP assigned with DHCP disabled both through Netplan, not through the router.

I'll remember to check the Netplann (?) journal/logs around that time, or are you referring to dmesg?

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

Since you're not really sure what the issue is, check all the logfiles around the time the problem starts. maybe you'll see a service stopping or starting.

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

Thank you I'll do that! It's hard to catch exactly when it happens. I think I need to get some monitoring and alert services up and running

[–] [email protected] 1 points 1 year ago

Easiest route you could go is setup a systemd timer which runs every 5 mins, pings an ip and write the result into a logfile. that way you have a timestamp for the problem start without going all out with monitoring.

Good luck!

[–] [email protected] 1 points 1 year ago* (last edited 1 year ago) (1 children)

Changedetection.io it can send you an email or message when your server fails to ping it.you will then have the times. Its a 5 minute job to set it up. Make an account and your email or number or whatever and make a curl request to the specific endpoint in a cronjob

[–] [email protected] 1 points 1 year ago

Thanks I'll give that a shot! I was thinking about using a solution with my VPS, but I may go this route.

[–] [email protected] 1 points 1 year ago (1 children)

You don't need to catch that moment live, it was already recorded.

Take a look at journalctl -b -1 (previous boot).

[–] [email protected] 2 points 1 year ago

Thank you for this sweet tip! I'll definitely be using this.