Add Howto setup minio distributed with Docker

docs/Docker.md

@@ -10,7 +10,7 @@ docker run -p 9000:9000 minio/minio /export
 
 ```
 
-## 2. Run Minio Docker Container
+## 2. Run One Minio Docker Container
 
 Minio container requires a persistent volume to store configuration and application data. Following command maps local persistent directories from the host OS to virtual config `~/.minio` and export `/export` directories. 
 
@@ -37,3 +37,32 @@ docker run -p 9000:9000 --name minio1 \
   minio/minio /export
 
 ```
+
+## 4. Run Minio in clustered mode
+
+Let's consider that we need to run 4 minio servers inside different docker instances.
+
+### Prepare and start Minio docker instances
+```sh
+$ docker run -d --name=minio1 -e "MINIO_ACCESS_KEY=abcde" -e "MINIO_SECRET_KEY=secret00" -it -v/mnt/export/minio1:/export minio/minio
+$ docker run -d --name=minio2 -e "MINIO_ACCESS_KEY=abcde" -e "MINIO_SECRET_KEY=secret00" -it -v/mnt/export/minio2:/export minio/minio
+$ docker run -d --name=minio3 -e "MINIO_ACCESS_KEY=abcde" -e "MINIO_SECRET_KEY=secret00" -it -v/mnt/export/minio3:/export minio/minio
+$ docker run -d --name=minio4 -e "MINIO_ACCESS_KEY=abcde" -e "MINIO_SECRET_KEY=secret00" -it -v/mnt/export/minio4:/export minio/minio
+```
+
+### Get docker instances IP addresses:
+```sh
+$ docker ps -q | xargs -n 1 docker inspect  --format '{{ .NetworkSettings.IPAddress }}'
+172.17.0.2
+172.17.0.3
+172.17.0.4
+172.17.0.5
+```
+
+### Run all minio instances
+```sh
+$ docker exec -d minio1 minio server 172.17.0.2:/export 172.17.0.3:/export 172.17.0.4:/export 172.17.0.5:/export
+$ docker exec -d minio2 minio server 172.17.0.2:/export 172.17.0.3:/export 172.17.0.4:/export 172.17.0.5:/export
+$ docker exec -d minio3 minio server 172.17.0.2:/export 172.17.0.3:/export 172.17.0.4:/export 172.17.0.5:/export
+$ docker exec -d minio4 minio server 172.17.0.2:/export 172.17.0.3:/export 172.17.0.4:/export 172.17.0.5:/export
+```