# Does the Elasticsearch Docker Cluster demo persist all data in the volumes?

**URL:** <https://discuss.elastic.co/t/does-the-elasticsearch-docker-cluster-demo-persist-all-data-in-the-volumes/218040>\
**Category:** Elasticsearch\
**Created:** [February 5, 2020, 6:05pm UTC](https://discuss.elastic.co/t/does-the-elasticsearch-docker-cluster-demo-persist-all-data-in-the-volumes/218040 "2020-02-05T18:05:06Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![fallenreaper](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/fallenreaper/32/62407_2.png) [@fallenreaper](https://discuss.elastic.co/u/fallenreaper)\
**Post date:** [February 5, 2020, 6:05pm UTC](https://discuss.elastic.co/t/does-the-elasticsearch-docker-cluster-demo-persist-all-data-in-the-volumes/218040/1 "2020-02-05T18:05:06Z")

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I was liking the sample 3 container cluster which was set up, and upped it to 5. I was trying to understand more of the docker stuff itself, so i was thinking that under the hood this docker image will save the Documents to the volume. That way, I can just point to the space on host I want volumes to live at.

Ideally, I am thinking to expand this by adding a bunch more containers which will have beats and logstash and will report to the exposed Cluster master.

I had 1 question, which I think is important, according to the Sample Docker-Compose yaml file, is it easy to spin up 10 other containers on another 2 machines and connect them as 1 giant swarm? It looks like Elasticsearch generally just works as long as they have the same cluster name / elasticsearch name. I wanted to know if there are specific flags I need to set up to do something as follows:

Host1: Docker Cluster with 1 master + 4 worker nodes.  
Host2: Docker Cluster ( 4 Worker )  
Host3: Docker Cluster ( 6 workers )

I wasn't sure what I need to change in the docker compose to have all 3 hosts linkall the workers and the master to be 1 large cluster. I thought there may need to be some tweaks to get Host2 containers to connect to Host1's network etc. I think the network defined is a bridge, so i figured I need to augment that.

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**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [March 4, 2020, 6:05pm UTC](https://discuss.elastic.co/t/does-the-elasticsearch-docker-cluster-demo-persist-all-data-in-the-volumes/218040/2 "2020-03-04T18:05:06Z")

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