Load testing experiment
This is a NixOps network and model application to experiment with a hypothetical IOT scaling scenario:
There are a number of devices out in the field which regularly send their measurements to a server and poll for commands.
The question is how will the server perform with a large number of devices and what will be the performance bottleneck.
More discussion in my blog post.
How to run the test harness
To try the test harness on VirtualBox:
$ nixops create -d load-test load-test-network.nix load-test-vbox.nix
$ nixops deploy -d load-test
The various tools can be accessed at the following URLs (IP addresses might vary slightly)
- Locust: http://192.168.56.101:8089/
- Prometheus: http://192.168.56.102:9090
- Grafana: http://192.168.56.102:3000
- Model App: http://192.168.56.102:8080/metrics
Setting up Grafana
Grafana doesn't have a simple JSON export/import for data sources, so there is some manual setup to do.
- Sign in to Grafana with username
admin, passwordadmin. - Add a data source
- Name: prometheus
- Default: Yes
- Type: Prometheus
- URL: http://localhost:9090
- Access: Proxy
- Scrape interval: 10s
- Import a Dashboard
- Upload the file
grafana/dashboard.json.
- Upload the file
- View the dashboard, etc. Upload the dashboard to raintank.io by using the share button at the top of the page and selecting Snapshot.