moby/docs/sources/examples/couchdb_data_volumes.rst

title

Sharing data between 2 couchdb databases

description

Sharing data between 2 couchdb databases

keywords

docker, example, package installation, networking, couchdb, data volumes

CouchDB Service

Here's an example of using data volumes to share the same data between 2 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 -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)/_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 -volumes-from $COUCH1 shykes/couchdb:2013-05-03)

Browse data on the second database

HOST=localhost
URL="http://$HOST:$(sudo docker port $COUCH2 5984)/_utils/"
echo "Navigate to $URL in your browser. You should see the same data as in the first database"'!'

Congratulations, you are running 2 Couchdb containers, completely isolated from each other except for their data.