this post was submitted on 16 Jun 2023
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11
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 ?

[–] manned_meatball@lemmy.ml 0 points 1 year ago* (last edited 1 year ago) (1 children)

lol I literally did this yesterday for my job, using dashboard 1860 too. I used a docker compose stack following their guide here.

[–] majorswitcher@lemmyfly.org 0 points 1 year ago (1 children)

i'm now looking into logging more specific http request data. Maybe https://github.com/martin-helmich/prometheus-nginxlog-exporter?

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

http_response metrics are also up, using https://github.com/martin-helmich/prometheus-nginxlog-exporter

would be nice to see the numbers go up :)