This example illustrates how to use yabeda gem suite with rails application to draw graphs for app metrics.
Recent versions of Docker and Docker Compose installed.
- Execute
docker-compose up
to start. - Go to rails application at https://localhost:5000
- Hit the button and refresh page few times
- Go to Grafana Web UI at localhost (user:
admin
/admin
) - Look for graphs
- After starting up docker-compose will run
rails-stressor
service to simulate huge load for the rails app. By default will do the request for 2 minutes. Settings could be changed indocker-compose.yml
config (command parameter of therails_stressor
service).
You also could run rails stressor again by executing docker-compose up rails_stressor
command.
- Sample Rails application is equipped with yabeda-rails, yabeda-sidekiq, yabeda-puma-plugin, and yabeda-prometheus gems and properly configured.
- Raw rails metrics are exposed at https://localhost:5000/metrics
- Raw sidekiq metrics are exposed at https://localhost:5100/metrics
- Raw puma metrics are exposed at https://localhost:5100/metrics
- The Prometheus Web UI runs at https://localhost:9090
- The Grafana Web UI runs at https://localhost:3000 , user:
admin
/admin
. - The Sidekiq Web UI is available at https://localhost:5000/sidekiq
If your grafana's container is not running correctly after you run docker-compose up
you're probably getting this error, if you check at docker ps -a
you'll see your grana container with the status Exited
, picks the id of this container and run docker logs YOUR_GRAFANA_CONTAINER_ID
and check if the errors is equal to the following:
GF_PATHS_DATA='/var/lib/grafana' is not writable.
You may have issues with file permissions, more information here: https://docs.grafana.org/installation/docker/#migration-from-a-previou
s-version-of-the-docker-container-to-5-1-or-later
mkdir: cannot create directory '/var/lib/grafana/plugins': Permission denied
Replace at your docker-compose.yml
line 38 by your user's id
that you will get on the following command:
id -u
The configurations are based off the following articles and repositories:
- https://finestructure.co/blog/2016/5/16/monitoring-with-prometheus-grafana-docker-part-1
- https://github.com/NikolajLeischner/local-prometheus-grafana
- https://www.digitalocean.com/community/tutorials/how-to-add-a-prometheus-dashboard-to-grafana
This example is available as open source under the terms of the MIT License.