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A Guide to Monitor Linux Server using Prometheus and Grafana (geekflare.com)

submitted 1 year ago* (last edited 1 year ago) by majorswitcher@lemmyfly.org to c/selfhosted@lemmy.world

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running a lemmy instance has learned me a lot about devops already!

I love playing around with this, the lemmy instance was a great reason. lemmyfly.org doesn't have a lot of traffic yet, I think it can handle some more. Currently running on 2 vcpu/4gb ram.

After chatting to my devops colleague at work I wanted to set up a Grafana dashboard with metrics on the server. Seems it's pretty pretty doable!

I installed prometheus node_exporter on my lemmy server
I created a second server at my VPS. Very cheap, and don't think I'll be running the Prometheus/Grafana 24/7 so I'll just create a snapshot of it, destroy the server and re-create when wanted
Created an internal private network so the instances can communicate without exposing ports to the public
Installed Prometheus on the new prometheus server
Installed Grafana
log in to Grafana, admin:admin then change password
Go to the Grafana home dashboard, click on + sign and click on Import. In Import via grafana.com, put the dashboard id 1860 (preset for all prometheus node_exporter metrics) and click on Load.
Done!

Last 2 hours in the garden with a beer on the side, WFH FTW

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[–] Wesleysnoops@reddthat.com 1 points 1 year ago (1 children)

Very cool! What's bandwidth and system consumption been like so far?

[–] majorswitcher@lemmyfly.org 1 points 1 year ago

actually I did delete the server (after creating a snapshot of it) a week or so ago. But this morning I wanted to check lemmyfly.org, couldn't load the page. Checking my Hetzner dashboard I noticed CPU was spiked at 200%?! It did drop again though, but apparently had last for 2-3 minutes. But prometheus was down, so no graphs apart from the hetzner ones. I doesn't relate to network traffic spikes, so I don't know what caused it. I've started the prometheus server again (that snapshot was really useful :) ) and will leave it on for a couple of months now.

current system consumption:

I might need to get an extra volume for storage, Lemmy is starting to eat up the root filesystem.. Does anyone know how I re-configure Lemmy to look at a different volume for storage ?