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+# Docker database images to run ejabberd tests
+
+You can start the Docker environment with Docker Compose, from ejabberd repository root.
+
+The following command will launch MySQL, PostgreSQL, Redis and Riak, and keep the console
+attached to it.
+
+```
+mkdir test/docker/db/mysql/data
+mkdir test/docker/db/postgres/data
+mkdir test/docker/db/riak/data
+(cd test/docker; docker-compose up)
+```
+
+You can stop all the databases with CTRL-C.
+
+You can fully clean up the environment with:
+
+```
+(cd test/docker; docker-compose down)
+```
+
+## TODO
+
+- Document how to fully clean the test data.
+