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PromEureka

Simple Prometheus integration to work with Eureka using json files.

Running

Run the jar adding EUREKA_SERVICE_URL and JSON_FILE_PATH environment variables.

For instance:

java -DEUREKA_SERVICE_URL=http://YOUR_EUREKA_ADDRESS \
     -DJSON_FILE_PATH=/opt/prometheus_config/discovery \
     -jar target/promeureka.jar

Or just create the docker container, and run it.

For instance:

docker build -t fernandonogueira/promeureka:1.0.4 . 

docker run -p 127.0.0.1:8080:8080/tcp \
           -e EUREKA_SERVICE_URL=http://YOUR_EUREKA_ADDRESS \
           -e JSON_FILE_PATH=/opt/prometheus_config/discovery \
           fernandonogueira/promeureka:1.0.4

Sample Prometheus Configuration

# my global config
global:
  scrape_interval:     15s # Set the scrape interval to every 15 seconds. Default is every 1 minute.
  evaluation_interval: 15s # Evaluate rules every 15 seconds. The default is every 1 minute.
  # scrape_timeout is set to the global default (10s).
  
scrape_configs:
  - job_name: 'eureka'
    metrics_path: '/management/prometheus'
    file_sd_configs:
      - files:
        - /opt/prometheus_config/discovery/*.json
        refresh_interval: 5m

Using this configuration, Prometheus will look for files ending with .json stored on the specified directory (/opt/prometheus_config/discovery/).