CouchDB

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"Apache CouchDB is a document-oriented database that can be queried and indexed in a MapReduce fashion using JavaScript." - CouchDB homepage

Installation

Install the couchdb package.

By default, the package depends on erlang-nox without GTK, for headless servers. You can also install the standard version, erlang, that does require GTK.

After installation Start/Enable the couchdb.service daemon and visit: http://127.0.0.1:5984/_utils/#setup to setup the database and admin user account. If you select single node setup you might need to create few databases manually via http api:

   curl -X PUT http://127.0.0.1:5984/_users
   curl -X PUT http://127.0.0.1:5984/_replicator
   curl -X PUT http://127.0.0.1:5984/_global_changes

see Single Node Setup for more.

Usage

Start/Enable the couchdb.service daemon.

Test to see if the service is running by running curl http://127.0.0.1:5984/. Ping will not work (it's not supposed to unlike on other systems where it does). Note that in order to access this instance of CouchDB from another system you'll need to configure it (see below).

Using Futon admin interface

You can now access the Futon admin interface by going to http://localhost:5984/_utils.

Configuration

Change the default port, bind address, log-level and other useful nuggets in /etc/couchdb/local.ini.

Tip: Set bind_address to 0.0.0.0 to access CouchDB from any computer other than local.

If you want to run CouchDB on port 80 you will have to run the daemon as root or use an iptables rule such as:

$ iptables -t nat -A PREROUTING -p tcp --dport 80 -j REDIRECT --to-ports 5984
Note: Do not modify /etc/couchdb/default.ini as it gets overwritten whenever couchdb is updated, copy any values you would like to change and put them in /etc/couchdb/local.ini. Also be sure to restart couchdb.service after changes to this file.

Creating a self-signed certificate

If you would like to use ssl with a self-signed certificate you can create one like this:

# cd /etc/couchdb
# openssl req -new -x509 -nodes -newkey rsa:4096 -keyout server.key -out server.crt

Then uncomment httpsd and update the paths in [daemons] and [ssl] sections:

/etc/couchdb/local.ini
[daemons]
httpsd = {couch_httpd, start_link, [https]}

[ssl]
cert_file = /etc/couchdb/server.crt
key_file = /etc/couchdb/server.key

Futon can be accessed over SSL on port 6984 via https://localhost:6984/_utils/.

Creating administrator users

Before a server admin is configured, all clients have admin privileges. To create an admin user, click on "Fix this" link at bottom right of Futon interface.

See create a read-only database for locking down databases and further security.

See also