Allow some services to be run under Docker

Overview

⚠ This Issues needs #904 addressed in order to effectively attempt this Issue.

To improve the reliability of GDK use when it comes to using data oriented services (especially when the minimum version is bumped) it would be great to have the choice between running them natively or via Docker.

Related: #406

Proposal

Allow the following services to be run under Docker where Docker images are available:

Docker registry
Elasticsearch
InfluxDB
Jaeger
Grafana
minio (object storage)
OpenLDAP
PostgreSQL
PostgreSQL for Geo
Prometheus
redis
ssh

Taking PostgreSQL as an example, to run it via Docker, you would update your gdk.yml to include docker_enabled: true, e.g.

postgresql:
  docker_enabled: true

Edited May 08, 2020 by Ash McKenzie