CouchDB is an Apache project.
Just like the name suggest it is a database. CouchDB is a NoSQL database. NoSQL databases doesn’t have any schema, tables, etc, that you’ll typically see in a traditional databases like Oracle or MySQL. The data in CouchDB are stored as JSON document, which you can access from a web browser using HTTP.
This article explains how to install CouchDB on RHEL based systems. For example, CentOS, Red Hat, Oracle Enterprise Linux, etc.
There are two methods to install CouchDB. You can install it from EPEL repository, or install from CouchDB source code.
Method 1: Install from EPEL
First,
enable EPEL repository as we explained earlier.
Verify that the couchdb is available for yum install.
# yum info couchdb
Name : couchdb
Arch : x86_64
Version : 1.0.3
Release : 2.el6
Size : 1.7 M
Repo : epel
Summary : A document database server, accessible via a RESTful JSON API
Install couchdb. Depending on your system, this might install lot of dependent packages. On my system, it installed 36 packages in total.
# yum install couchdb
Modify the local.ini file and add a line for bind_address and give the ip-address the system where couchdb is installed.
# vi /etc/couchdb/local.ini
[httpd]
;port = 5984
;bind_address = 127.0.0.1
bind_address = 192.168.101.38
Start the couchdb services
# service couchdb start
Starting couchdb: [ OK ]
# service couchdb status
couchdb (pid 29915) is running...
Verify that the couchdb works by going to the URL: http://{your-ip-address}:5984 , it should display a web-page that has the following message.
{“couchdb”:”Welcome”,”version”:”1.0.3″}
Go to: http://{your-ip-address}:5984/_utils/ from where you can create and manage the couchdb database.
Method 2: Install from CouchDB Source Code
If you like to install it yourself from the source code, first you
should satisfy all the dependencies.
Install the following standard packages from the CentOS repository.
# yum info gcc libtool xulrunner-devel libicu-devel openssl-devel
Install Erlang
Download the latest version of Erland from
here. Or, you can use the wget as shown below to directly download it.
cd /usr/src
wget http://www.erlang.org/download/otp_src_R15B01.tar.gz
tar xvfz otp_src_R15B01.tar.gz
We’ll be installing couchdb and all its dependencies under /opt/couchdb directory. So, while installing erlang, give the prefix as /opt/couchdb/erlang as shown below.
cd otp_src_R15B01
./configure --prefix=/opt/couchdb/erlang --without-termcap --without-javac --enable-smp-support --disable-hipe
make
make install
Install Curl
Download the latest version of Curl from
here. Or, you can use the wget as shown below to directly download it.
cd /usr/src
wget http://curl.haxx.se/download/curl-7.26.0.tar.gz
tar xvfz curl-7.25.0.tar.gz
Just like Erlang, we’ll be installing Curl also under /opt/couchdb directory. So, while installing curl, give the prefix as /opt/couchdb/curl as shown below.
cd curl-7.25.0
./configure --prefix=/opt/couchdb/curl
make
make install
SpiderMonkey JS Engine
Download the latest version of SpiderMonkey JS from
here. Or, you can use the wget as shown below to directly download it.
cd /usr/src
wget http://ftp.mozilla.org/pub/mozilla.org/js/js185-1.0.0.tar.gz
tar xvfz js185-1.0.0.tar.gz
Please note that you have to cd to “js/src” subdirectory under js-1.8.5 to do the ./configure and make as shown below to install spidermonkey js engine.
cd js-1.8.5/js/src
./configure
make
make install
You’ll see the libmozjs185.so.1.0.0 and libmozjs185-1.0.a installed under /usr/local/lib
# ls -ltr /usr/local/lib
-rwxr-xr-x. 1 root root 3671764 May 30 09:39 libmozjs185.so.1.0.0
-rwxr-xr-x. 1 root root 5523616 May 30 09:39 libmozjs185-1.0.a
lrwxrwxrwx. 1 root root 35 May 30 09:40 libmozjs185.so.1.0 -> /usr/local/lib/libmozjs185.so.1.0.0
lrwxrwxrwx. 1 root root 33 May 30 09:40 libmozjs185.so -> /usr/local/lib/libmozjs185.so.1.0
Note: If spidermonkey JS library is not installed, you’ll get the following error mesage while trying to do the ./configure mentioned in the next step.
checking for JS_NewObject in -lmozjs185... no
configure: error: Could not find the js library.
Is the Mozilla SpiderMonkey library installed?
Install CouchDB
Download the latest version of Couchdb from
here. Or, you can use the wget as shown below to directly download it.
cd /usr/src
wget http://apache.mirrors.pair.com/couchdb/releases/1.2.0/apache-couchdb-1.2.0.tar.gz
tar xvfz apache-couchdb-1.2.0.tar.gz
While installing couchdb, you should set ERL, ERLC, CURL_CONFIG environment variables as shown below. These are required during the ./config of couchdb.
Just like the prereqs, we’ll be installing couchdb under /opt/couchdb directory. So, give the prefix as /opt/couchdb/couchdb as shown below.
cd apache-couchdb-1.2.0
export ERL=/opt/couchdb/erlang/bin/erl
export ERLC=/opt/couchdb/erlang/bin/erlc
export CURL_CONFIG=/opt/couchdb/curl/bin/curl-config
export LDFLAGS=-L/opt/couchdb/curl/lib
./configure --prefix=/opt/couchdb/couchdb --with-erlang=/opt/couchdb/erlang/lib/erlang/usr/include/ --enable-js-trunk
make
make install
Note: You’ll use the –enable-js-trunk only if you’ve installed the latest version (anything newer than js185-1.0.0) of the SpiderMonkey JS engine. I recommend that you use –enable-js-trunk option.
If you are not using the latest version of spidermonekey JS engine, you may want to use the flags –with-js-include and –with-js-lib and point it to the appropriate location as shown below.
./configure --prefix=/opt/couchdb/couchdb --with-erlang=/opt/couchdb/erlang/lib/erlang/usr/include/ --with-js-include=/usr/include/xulrunner-2/ --with-js-lib=/usr/lib64/xulrunner-devel-2/lib/
Note: If you’ve installed the latest version of spidermonkey js, and if you are not using –enable-js-trunk, you’ll get the following error message during “make” of couchdb:
cc1: warnings being treated as errors
In file included from couch_js/main.c:20:
couch_js/sm170.c: In function req_status:
couch_js/sm170.c:105: error: implicit declaration of function INT_FITS_IN_JSVAL
couch_js/sm170.c: In function evalcx:
couch_js/sm170.c:138: error: implicit declaration of function JS_GetStringChars
couch_js/sm170.c:138: error: assignment makes pointer from integer without a cast
couch_js/sm170.c: In function seal:
couch_js/sm170.c:220: error: implicit declaration of function JS_SealObject
couch_js/sm170.c: At top level:
couch_js/sm170.c:236: error: initialization from incompatible pointer type
Setup CouchDB Startup Services
Create a couchdb user that is required by the couchdb startup program.
# adduser couchdb
Change the ownership of the var directory, where couchdb will write logs and some other information.
# chown -R couchdb /opt/couchdb/couchdb/var/
Create a link under /etc/init.d for couchdb service
# ln -s /opt/couchdb/couchdb/etc/rc.d/couchdb /etc/init.d/couchdb
Finally start the couchdb service.
# service couchdb start
Starting database server couchdb
Verify that the couchdb works by going to the URL: http://{your-ip-address}:5984 , it should display a web-page that has the following message.
{“couchdb”:”Welcome”,”version”:”1.0.3″}
Go to: http://{your-ip-address}:5984/_utils/ from where you can create and manage the coucbdb database.
