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A Ruby on Rails template with prometheus, loki and grafana setup

Dockerfile 1.80% Ruby 97.55% HTML 0.65%

hacktoberfest grafana loki prometheus promtail ruby ruby-on-rails docker docker-compose

profana's Introduction

Ruby on Rails with prometheus/grafana/loki for monitoring

This is a template to create a rails project with prom and grafana monitiring from start.

This project requires docker.

Contents

Minimal Rails app
Prometheus
Grafana
Loki
Promtail
Caddy
Redis
Postgres

Running

check the .env and compose files to change secrets
change compose files latest versions to avoid breaking changes whant using it as a template
run docker compose -f docker-compose.yaml -f docker-compose.dev.yaml up -d --build
access grafana panel
add loki and prometheus as connections
access rails app to generate logs
add grafana dash with loki metrics

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profana's Issues

Update to Rails 7.1

promtail logs are not being updated because Docker containers don't update mounted files

I am using your repo as inspiration to configure promtail using Docker in my project. Appologice if this issue is not happening on your setup.

when I start the promtail image with:

docker-compose up promtail

I see the logs are being detected:

promtail_1  | level=info ts=2024-05-14T19:39:32.980862331Z caller=tailer.go:147 component=tailer msg="tail routine: started" path=/var/log/rails/development.log

And they are digested by Loki and presented in Grafana.

But new logs are not being detected.

If I bash into the promtail image I see the /var/log/rails/*.log files are frozen and they are not being updated with my locals /railsapp/logs/*.log.

This looks to be a limitation with Docker containers: https://stackoverflow.com/questions/52897000/docker-files-from-volume-not-updated-in-target

Did you manage to make this work?

Thanks for your support and your work.

add promtail to caddy

Add grafana loggign caddu requests via promtail + loki

Add a health endpoint

Add a /health endpoint

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