document other docker stacks

Author: Dieterbe

devdocs/docker.md

@@ -0,0 +1,53 @@
+# docker stacks
+
+You may have already followed [our docker quickstart guide](https://github.com/grafana/metrictank/blob/master/docs/quick-start-docker.md) but in fact,
+the metrictank repository contains a variety of docker stacks for different purposes.
+Here's an overview.
+Note:
+* not everything is detailed here. Plus this needs some more work.  For specifics on any setup, please refer to the sources.
+* every environment comes with grafana and cassandra unless otherwise noted
+* every environment automatically provisions useful datasources and dashboards unless otherwise noted
+
+### docker-standard
+
+plain, basic environment.
+uses metrictank docker image (with baked in binaries and configs), statsdaemon.
+Comes with 1 dashboard: the metrictank dashboard
+
+### docker-dev
+
+Similar to docker-standard, but custom metrictank build is loaded, custom configs from scripts/config
+also: tag support, main+extra dashboards
+
+
+### docker-dev-scylla
+
+Same as docker-dev but using scylladb instead of cassandra
+
+### docker-dev-custom-cfg-kafka
+
+Similar to docker-dev in terms of build and configuration.
+Also:
+* kafka input and clustering backend
+* short chunkspan & numchunks 
+  (benefits: easy to trigger mem and mem_and_cass requests, frequent cass saves, notifier messages etc)
+* prometheus monitoring and jaeger tracing
+* caddy-proxied endpooints/datasources to check with different org-id auth headers
+* tsdb-gw
+
+### docker-cluster
+
+Similar to docker-dev-custom-cfg-kafka
+
+* uses a cluster of 4 MT's (with 2x replication)
+* separate graphite monitoring server
+
+### docker-chaos
+
+Similar to docker-cluster but used for chaos testing
+
+
+### docker-cosmosdb
+
+Used for testing against cosmosDB. Note: expects you to have a reachable cosmosdb and adjust settings accordingly.
+Does not auto-load datasources or dashboards.

docker/docker-dev-custom-cfg-kafka/README.md

@@ -152,3 +152,7 @@ To clean up all data so you can start fresh, run this after you stopped the stac
 docker rm -v $(docker ps -a -q -f status=exited)
 ```
 This will remove the stopped containers and their data volumes.
+
+## Other docker stacks
+
+The metrictank repository holds other stack configurations as well (for clustering, benchmarking, etc). See [devdocs/docker](../devdocs/docker.md) for more info.