prometheus-mock-data

Prometheus functions are hard to learn, it will be better if you can provide artificial data to test with. This tool comes to the rescue.

Build

mvn clean package

Usage

Create a file containing scrape data you want to provide:

<1st time scrape data>
---
<2nd time scrape data>
---
<3rd time scrape data>
---
<4th time scrape data>
...

Example:

# HELP jvm_buffer_pool_used_bytes Used bytes of a given JVM buffer pool.
# TYPE jvm_buffer_pool_used_bytes gauge
jvm_buffer_pool_used_bytes{pool="direct",} 40960.0
jvm_buffer_pool_used_bytes{pool="mapped",} 0.0
---
# HELP jvm_buffer_pool_used_bytes Used bytes of a given JVM buffer pool.
# TYPE jvm_buffer_pool_used_bytes gauge
jvm_buffer_pool_used_bytes{pool="direct",} 41960.0
jvm_buffer_pool_used_bytes{pool="mapped",} 0.0

Run jar:

java -jar prometheus-mock-data.jar <path-to-scrape-data-file>

Open browser, navigate to http://localhost:8080/metrics, refresh browser and you'll see program provide metrics from scrape data file cyclicly.

Configure prometheus to scrape, see doc

Using Docker

Example:

docker run \
  -v $(pwd)/scrape-data.txt:/home/java-app/etc/scrape-data.txt \
  -p 8080:8080 \
  chanjarster/prometheus-mock-data:latest