moby--moby/docs/sources/examples/couchdb_data_volumes.md

page_title: Sharing data between 2 couchdb databases page_description: Sharing data between 2 couchdb databases page_keywords: docker, example, package installation, networking, couchdb, data volumes

CouchDB Service

Note

:

• This example assumes you have Docker running in daemon mode. For more information please see Check your Docker install.
• If you don't like sudo then see Giving non-root access

Here's an example of using data volumes to share the same data between two CouchDB containers. This could be used for hot upgrades, testing different versions of CouchDB on the same data, etc.

Create first database

Note that we're marking /var/lib/couchdb as a data volume.

$ COUCH1=$(sudo docker run -d -p 5984 -v /var/lib/couchdb shykes/couchdb:2013-05-03)

Add data to the first database

We're assuming your Docker host is reachable at localhost. If not, replace localhost with the public IP of your Docker host.

$ HOST=localhost
$ URL="http://$HOST:$(sudo docker port $COUCH1 5984 | grep -o '[1-9][0-9]*$')/_utils/"
$ echo "Navigate to $URL in your browser, and use the couch interface to add data"

Create second database

This time, we're requesting shared access to $COUCH1's volumes.

$ COUCH2=$(sudo docker run -d -p 5984 --volumes-from $COUCH1 shykes/couchdb:2013-05-03)

Browse data on the second database

$ HOST=localhost
$ URL="http://$HOST:$(sudo docker port $COUCH2 5984 | grep -o '[1-9][0-9]*$')/_utils/"
$ echo "Navigate to $URL in your browser. You should see the same data as in the first database"'!'

Congratulations, you are now running two Couchdb containers, completely isolated from each other except for their data.