7f9178c6d1
Docker-DCO-1.1-Signed-off-by: Adam Singer <financeCoding@gmail.com> (github: financeCoding)
47 lines
1.8 KiB
Markdown
47 lines
1.8 KiB
Markdown
page_title: Sharing data between 2 couchdb databases
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page_description: Sharing data between 2 couchdb databases
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page_keywords: docker, example, package installation, networking, couchdb, data volumes
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# CouchDB Service
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> **Note**:
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>
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> - This example assumes you have Docker running in daemon mode. For
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> more information please see [*Check your Docker
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> install*](../hello_world/#running-examples).
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> - **If you don't like sudo** then see [*Giving non-root
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> access*](/installation/binaries/#dockergroup)
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Here's an example of using data volumes to share the same data between
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two CouchDB containers. This could be used for hot upgrades, testing
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different versions of CouchDB on the same data, etc.
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## Create first database
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Note that we're marking `/var/lib/couchdb` as a data volume.
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$ COUCH1=$(sudo docker run -d -p 5984 -v /var/lib/couchdb shykes/couchdb:2013-05-03)
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## Add data to the first database
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We're assuming your Docker host is reachable at `localhost`. If not,
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replace `localhost` with the public IP of your Docker host.
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$ HOST=localhost
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$ URL="http://$HOST:$(sudo docker port $COUCH1 5984 | grep -o '[1-9][0-9]*$')/_utils/"
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$ echo "Navigate to $URL in your browser, and use the couch interface to add data"
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## Create second database
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This time, we're requesting shared access to `$COUCH1`'s volumes.
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$ COUCH2=$(sudo docker run -d -p 5984 --volumes-from $COUCH1 shykes/couchdb:2013-05-03)
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## Browse data on the second database
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$ HOST=localhost
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$ URL="http://$HOST:$(sudo docker port $COUCH2 5984 | grep -o '[1-9][0-9]*$')/_utils/"
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$ echo "Navigate to $URL in your browser. You should see the same data as in the first database"'!'
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Congratulations, you are now running two Couchdb containers, completely
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isolated from each other *except* for their data.
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