Grafana Loki for Beginners | Grafana Loki and Promtail | Log Aggregation and Visualization

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Grafana Loki is a horizontally-scalable, highly-available, multi-tenant log aggregation system inspired by Prometheus. It is designed to be very cost effective and easy to operate, as it does not index the contents of the logs, but rather a set of labels for each log stream. Grafana Loki can be used to search, analyze, and alert on logs. It can also be used in conjunction with Grafana, a popular open-source data visualization tool, to create dashboards and visualizations of log data.

Promtail (short for "Prometheus Log Tail") is a daemon that reads log files and sends the log data to a Loki instance. It is designed to work in conjunction with Grafana Loki to provide a log aggregation and analysis solution. Promtail runs on each node in a cluster and reads log files, extracting relevant metadata (such as labels) and sending the log data to a Loki instance. It can automatically discover new log files and can be configured to handle logs from various sources, such as Docker containers, Kubernetes pods, and system logs. This allows for a more efficient and centralized log management system.

Timeline
00:00 Grafana Loki Introduction
01:50 Grafana Loki Architecture
02:50 Grafana Loki and Promtail Installation
05:35 Understanding Promtail Configuration File
09:52 Configuring Loki data source in Grafana

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[legooos]

My most precious takeaway from this guide is vim ZZ shortcut, thank you very much!

[architbidkar]

Great one Vikas! It's very helpful. Keep making more videos on Grafana !!

[mirraneabdelhadi]

Hello, is there any tutorial on how to install promtail on multiple servers, means receive the logs for multiple machines, because on my end it works only on one machine.

[neelamzanvar]

HI, i have a quey. when u click on the log that is returned after selecting the label there are detected fields. I am not getting anything like that the only fields i am getting is host, job and filename. how can i get extra labels?

[muhammadadityamadjid]

sir if i will to alert logs and i have the situation log of ssh? Why i have to many problem

[balakumar]

Hello Vikas, Can you please solve my issue I have install loki on local system and promtail and the application on VM. I have configured loki and promtail to scrape application log. In the same grafana dashboard the query is not returning any logs and stats. but when I run the same query in query Explorer-> live mode the query is returning logs.

[chandrusanthosh]

Hey hi, actually im using xk6 for send logs to loki, is it possible to send our own messages to loki like " This is loki test by chandru" Message

[AjayKumar-lmyr]

How to store Grafana Loki logs in Azure Blob Storage

[gujaratiincanada]

you are the best man I have performed video perfectlayy

[ittechsupport]

Hi vikas, Can you make video on how to download the logs with time frame and tar file download using API with any code like golang etc!!

[fnuplwg]

how to Install a Second Promtail Service?

[ktgriuh]

how to download logs from grafana-loki

[carmilocabigon]

Hi Vikas, thank you so much for this video, would like to ask if you can make another one with Promtail installed via Helm? Apparently, installation via Docker is only advisable for testing and development purposes. Thanks

[pranjalix]

Hi Vikas. have just started learning about Grafana and I have a query. If we need a graph or any chart which grafana doesn't offer(out of box), is there a way to write custom code for same (in angular/react) ?

[parikshitsharma]

Thanks you Vikas, It helped me to understand more basics of query formation and other things as well, but will you be making details videos to make complex queries or making dashboard by using those query ?

[sarvagyamaithani]

Can we change this default port 3000 to any other because I'm already using it in one of my applications

[ramyaranjanswain]

Thanks you Vikas for your all videos , I am trying to make a dashboard for windows event logs, not able to find any way to make it, pls help me on this.

[manusoftar]

Absolutely useless, I followed all the steps but Grafana will not connect to Loki... it just wont and if I try to open localhost:3100 it brings back an error 404, even though /metrics brings all those metrics.

[ihenners_]

Hi - I have this config running on my monitoring server and want to scrape the config from Mr production server. I have put the IP and port of my production server in the promtail-config
But It looks like it is still only returning my monitoring server logs.

I have node_exporter running on port 9100 on my production server. I am using aws and for now my security groups are open on the relevant ports to allow my monitoring server to talk to my production server.

What configs do I need to change?