Ansible role to deploy postgres_exporter,
running in a docker container.
Set postgres_exporter_db_[host|post|user|pass] according to your
databases configuration, and scrape the container on it's port 9187
(e.g.: http://{container_ip}:9187/metrics).
For more configuration options using environment variables, see the
official README
and set the configuration in postgres_exporter_container_env to override
the defaults.