Prometheus Exporter for VoltDB

Exports VoltDB metrics and allows for Prometheus scraping.

Installation

You need to have Go version go1.10.3 darwin/amd64 configured (with proper $GOPATH).

mkdir -p $GOPATH/src/github.com/mreading/
cd $GOPATH/src/github.com/mreading/
git clone https://github.com/mreading/voltdb_exporter.git
cd voltdb_exporter
go build
go install

Dependencies

You need to install the following Go packages using go get.

1. github.com/prometheus/client_golang/prometheus
2. github.com/tidwall/gjson

Configuration

The exporter is configured with CLI arguments. Of course, start your VoltDB server before running the exporter (it will complain).

Flag	ENV variable	Default	Meaning
-h	VOLTDB_EXPORTER_HOST	localhost:8080	Address(es) of one or more nodes of the cluster, comma seperated
-u	VOLTDB_EXPORTER_USER	(empty)	Username for database authentication (required)
-p	VOLTDB_EXPORTER_PASS	(empty)	Password for database authentication (required)
-n	VOLTDB_EXPORTER_NAMESPACE	voltdb	Namespace for metrics
-l	VOLTDB_EXPORTER_LISTEN	:9469	Address to listen on for web interface and telemetry
-m	VOLTDB_EXPORTER_PATH	/metrics	Path under which to expose metrics
-H	VOLTDB_EXPORTER_USE_HTTP	false	Use HTTP connections instead HTTPS
-i	VOLTDB_EXPORTER_INSECURE	false	Skip certificate check

Below is an example configuration to run the exporter.

voltdb_exporter -h localhost:8080,localhost:8081 -u matt -p secret -n voltdb -l :9469 -m /metrics

Prometheus

To scrape data from the VoltDB server, download and run Prometheus. The default port is :9090.

prometheus --config.file=config/prometheus.yml

Grafana

To visualize scraped VoltDB statistics from Prometheus, download and run Grafana. The default port is :3000.

brew update
brew install grafana
brew services start grafana

Next, import the VoltDB Dashboard (config/voltdb-grafana-dashboard.json), et voila! Enjoy your metrics.

Notes

Ideas and code heavily inspired by other database exporters found under the Exporter and Integrations page on the Prometheus website.