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moby--moby/docs/sources/examples/couchdb_data_volumes.rst
2013-07-30 01:39:29 -04:00

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:title: Sharing data between 2 couchdb databases
:description: Sharing data between 2 couchdb databases
:keywords: docker, example, package installation, networking, couchdb, data volumes
.. _running_couchdb_service:
CouchDB Service
===============
.. include:: example_header.inc
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.
.. code-block:: bash
COUCH1=$(docker run -d -v /var/lib/couchdb shykes/couchdb:2013-05-03)
Add data to the first database
------------------------------
We're assuming your docker host is reachable at `localhost`. If not, replace `localhost` with the public IP of your docker host.
.. code-block:: bash
HOST=localhost
URL="http://$HOST:$(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 $COUCH1's volumes.
.. code-block:: bash
COUCH2=$(docker run -d -volumes-from $COUCH1 shykes/couchdb:2013-05-03)
Browse data on the second database
----------------------------------
.. code-block:: bash
HOST=localhost
URL="http://$HOST:$(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.