Here's a quick start to stand-up a Prometheus stack containing Prometheus, Grafana and Node scraper to monitor your Docker infrastructure. A big shoutout to philicious for kicking this project off!
Before we get started installing the Prometheus stack. Ensure you install the latest version of docker and docker-compose on your Docker host machine. This has also been tested with Docker for Mac and it works well.
Clone the project locally to your Docker host.
If you would like to change which targets should be monitored or make configuration changes edit the /prometheus/prometheus.yml file. The targets section is where you define what should be monitored by Prometheus. The names defined in this file are actually sourced from the service name in the docker-compose file. If you wish to change names of the services you can add the "container_name" parameter in the docker-compose.yml file.
Once configurations are done let's start it up. From the /prometheus project directory run the following command:
$ docker-compose up -d
That's it. docker-compose builds the entire Grafa and Prometheus stack automagically.
The Grafana Dashboard is now accessible via: http://<Host IP Address>:3000 for example http://192.168.10.1:3000
username - admin
password - foobar (Password is stored in the config.monitoring env file)
Now we need to create the Prometheus Datasource in order to connect Grafana to Prometheus
- Click the
GrafanaMenu at the top left corner (looks like a fireball) - Click
Data Sources - Click the green button
Add Data Source.
Alerting has been added to the stack with Slack integration. 2 Alerts have been added and are managed
Alerts - prometheus/alert.rules
Slack configuration - alertmanager/config.yml
The Slack configuration requires to build a custom integration.
- Open your slack team in your browser
https://<your-slack-team>.slack.com/apps - Click build in the upper right corner
- Make a Custom integration
- Choose Incoming Web Hooks
- Select which channel
- Click on Add Incoming WebHooks integration
- Copy the Webhook URL into the
alertmanager/config.ymlURL section - Fill in Slack username and channel
View Prometheus alerts http://<Host IP Address>:9090/alerts
View Alert Manager http://<Host IP Address>:9093
A quick test for your alerts is to stop a service. Stop the node_exporter container and you should notice shortly the alert arrive in Slack. Also check the alerts in both the Alert Manager and Prometheus Alerts just to understand how they flow through the system.
High load test alert - docker run --rm -it busybox sh -c "while true; do :; done"
Let this run for a few minutes and you will notice the load alert appear.
I created a Dashboard template which is available on Grafana Docker Dashboard. Simply download the dashboard and select from the Grafana menu -> Dashboards -> Import
This dashboard is intended to help you get started with monitoring. If you have any changes you would like to see in the Dashboard let me know so I can update Grafana site as well.
Here's the Dashboard Template
Grafana Dashboard - dashboards/Grana_Dashboad.json
Alerting Dashboard - dashboards/System_Monitoring.json
It appears some people have reported no data appearing in Grafana. If this is happening to you be sure to check the time range being queried within Grafana to ensure it is using Today's date with current time.