hbase-exporter/README.md

# hbase-exporter

## An HBase Prometheus Exporter

Relays JMX metrics for consumption by Prometheus

The exporter parses the (Hortonworks) Hadoop config and uses (Hortonworks)
Hadoop internal tooling to determine e.g. the currently active master
so that it can run in different environments without requiring any configuration

Those tools are not yet included when building the app as a container!

Since some important metrics are missing or empty
in JMX, we additionally parse the HBase Master UI
for e.g. 'Stale regions in transition'

The hbase hbck log is parsed to check for
inconsistencies. The log is produced independently from the
exporter with the help of a systemd-timer unit and a systemd-hbck-service unit

Querying the active namenode requires superuser privileges

For requirements see requirements.txt

```sh
$ sudo dnf/yum install python36
```

```sh
# As the user executing the exporter:
$ pip3[.6] install --user beautifulsoup4 flatten_json prometheus_client requests
```