Using MongoDB with Drupal 7

$ sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv 9DA31620334BD75D9DCB49F368818C72E52529D4
 
#<a href="https://docs.mongodb.com/manual/tutorial/install-mongodb-on-ubuntu/
#">https://docs.mongodb.com/manual/tutorial/install-mongodb-on-ubuntu/
#</a> ubuntu 14.04
echo "deb [ arch=amd64 ] <a href="https://repo.mongodb.org/apt/ubuntu">https://repo.mongodb.org/apt/ubuntu</a> trusty/mongodb-org/4.0 multiverse" | sudo tee /etc/apt/sources.list.d/mongodb-org-4.0.list
 
#ubuntu 16.04
echo "deb [ arch=amd64,arm64 ] <a href="https://repo.mongodb.org/apt/ubuntu">https://repo.mongodb.org/apt/ubuntu</a> xenial/mongodb-org/4.0 multiverse" | sudo tee /etc/apt/sources.list.d/mongodb-org-4.0.list
 
#ubuntu 18.04
echo "deb [ arch=amd64 ] <a href="https://repo.mongodb.org/apt/ubuntu">https://repo.mongodb.org/apt/ubuntu</a> bionic/mongodb-org/4.0 multiverse" | sudo tee /etc/apt/sources.list.d/mongodb-org-4.0.list
 
# update package
sudo apt-get update
 
#install
sudo apt-get install -y mongodb-org
 
# start , stop , restart
sudo service mongod start
sudo service mongod stop
sudo service mongod restart
 
#verify
#check /var/log/mongodb/mongod.log file
[initandlisten] waiting for connections on port 27017

# PEAR is installed to put in place a package and distribution system that is used by both PEAR and PECL
$ sudo apt-get install php-pear
 
# The php7-dev package when installed lets you access the PHP5 source files that are needed to compile additional modules:
$ sudo apt-get install php7-dev
 
#Pecl is the preferred way to install the MongoDB driver.
$ pecl install mongo
 
# Add the mongo extension to /etc/php/apache2/php7.2/cli/php.ini file to Configuring PHP To Use The Driver.
extension=mongo.so

# download mongodb module
$ drush dl mongodb
 
#local.settings.php
$ touch sites/default/local.settings.php
 
# Add code to local.settings.php file
#MongoDB
$conf['mongodb_connections'] = array(
     'default' => array(                             // Connection name/alias
       'host' => 'localhost',                       // Omit USER:PASS@ if Mongo isn't configured to use authentication.
       'db' => 'YOURDATABASENAME'                   // Database name. Make something up, mongodb will automatically create the database.
      ),
   );
 
 
      include_once('./includes/cache.inc');
 
   # -- Configure Cache
   $conf['cache_backends'][] = 'sites/SITENAME/modules/mongodb/mongodb_cache/mongodb_cache.inc';
   $conf['cache_class_cache'] = 'DrupalMongoDBCache';
   $conf['cache_class_cache_bootstrap'] = 'DrupalMongoDBCache';
   $conf['cache_default_class'] = 'DrupalMongoDBCache';
 
   # -- Don't touch SQL if in Cache
   $conf['page_cache_without_database'] = TRUE;
   $conf['page_cache_invoke_hooks'] = FALSE;
 
   # Session Caching
   $conf['session_inc'] = 'sites/SITENAME/modules/mongodb/mongodb_session/mongodb_session.inc';
   $conf['cache_session'] = 'DrupalMongoDBCache';
 
   # Field Storage
   $conf['field_storage_default'] = 'mongodb_field_storage';
 
   # Message Queue 
     $conf['queue_default_class'] = 'MongoDBQueue';

#Enable
$ drush en mogodb

CONTENTS OF THIS FILE
---------------------
 
 * Introduction
 * Installation
 * Variables
 * Collections
 * Module specific configuration
 
 
INTRODUCTION
------------
 
MongoDB integration for Drupal. This module is a collection of several modules,
allowing to store different Drupal data in MongoDB.
 
mongodb                Support library for the other modules.
mongodb_block          Store block information in MongoDB. Very close to the
                       core block API.
mongodb_cache          Store cache in MongoDB.
mongodb_field_storage  Store fields in MongoDB.
mongodb_queue          DrupalQueueInterface implementation using MongoDB.
mongodb_session        Store sessions in MongoDB.
mongodb_watchdog       Store watchdog messages in MongoDB.
 
 
INSTALLATION & CONFIGURATION
------------
 
Install as usual, see <a href="http://drupal.org/node/895232">http://drupal.org/node/895232</a> for further information.
 
The MongoDB module and sub-modules need some amount of configuration before they
will properly work. This guide assumes that a MongoDB instance is already
installed and configured on localhost or remote server. This module additionally
provides Drush integration to make queries against the MongoDB databases used by
Drupal.
 
If MongoDB is installed on localhost, you may view the web admin interface:
> <a href="http://localhost:28017/
 
 
VARIABLES
------------
MongoDB">http://localhost:28017/
 
 
VARIABLES
------------
MongoDB</a> uses several specific configuration variables that are not currently
exposed in the UI. Non-developers should note that all $conf variables should
be placed at the bottom of the sites settings.php file under a #MongoDB comment.
 
Configuration Variables
 
#1: mongodb_connections
 
  The mongodb_connections variable holds the databases available to the module.
  The contents are arranged as an associative array holding the name (alias) of
  the connection, the database address, and the name of the database. If not
  defined, it makes a single default entry. See the note below *.
 
  EXAMPLE:
  $conf['mongodb_connections'] = array(
    // Connection name/alias
    'default' => array(
      // Omit USER:PASS@ if Mongo isn't configured to use authentication.
      'host' => 'mongodb://USER:<a href="mailto:PASS@localhost">PASS@localhost</a>',
      // Database name
      'db' => 'drupal_default',
    ),
  );
 
  * If mongodb_connections is not defined, 'default' is automatically
  created with the following settings:
  'default' => array('host' => 'localhost', 'db' => 'drupal')
 
  Also, connection_options might be specified to allow for connecting to
  replicate sets (and any other options listed on
  <a href="http://www.php.net/manual/mongo.construct.php">http://www.php.net/manual/mongo.construct.php</a>)
 
  $conf['mongodb_connections'] = array(
    // Connection name/alias
    'default' => array(
      'host' => 'host1,host2,host3',
      // Database name
      'db' => 'drupal_default',
      'connection_options' => array('replicaSet' => 'replicasetname'),
    ),
  );
 
#2: mongodb_debug
 
  A variable primarily for developers, mongodb_debug causes a collection
  to return a mongoDebugCollection and mongoDebugCursor instead of their
  normal equivalents. If not defined, defaults to FALSE.
 
  EXAMPLE:
  $conf['mongodb_debug'] = FALSE;
 
#3: mongodb_session
 
  This variable holds the name of the collection used by the mongodb_session
  sub-module. If not defined, it defaults to "session".
 
  EXAMPLE:
  $conf['mongodb_session'] = 'anyname';
 
#4: mongodb_slave
 
  This variable holds an array of the slaves used for the mongodb field storage
  sub-module. If not defined, it defaults to an empty array().
 
#5: mongodb_watchdog
 
  This variable holds the name of the collection used by the mongodb_watchdog
  module. It defaults to "watchdog".
 
  EXAMPLE:
  $conf['mongodb_watchdog'] = 'drupalogs';
 
#6: mongodb_watchdog_items
 
  This variable defines the maximum item limit on the capped collection used by
  the mongodb_watchdog sub-module. If not defined, it defaults to 10000.
  The actual (size-based) limit is derived from this variable, assuming 1 kiB
  per watchdog entry.
 
  EXAMPLE:
  $conf['mongodb_watchdog_items'] = 15000;
 
#7: watchdog_limit
 
  This variable define the maximum severity level to save into watchdog. Errors
  under this level will be ignored by watchdog. If not defined, all errors will
  saved.
 
  EXAMPLE:
  $conf['watchdog_limit'] = WATCHDOG_CRITICAL;
 
  See <a href="http://api.drupal.org/api/drupal/includes--common.inc/function/watchdog_severity_levels/7
">http://api.drupal.org/api/drupal/includes--common.inc/function/watchdog_...</a>  for further information about Watchdog severity levels.
 
#8: mongodb_collections
 
  See COLLECTIONS below.
 
 
COLLECTIONS
------------
 
Collections are MongoDB's equivalent of relational database tables. In the
context of this module, they can be used to span data from the multiple
submodules into separate databases. This is accomplished by aliasing the
collection name to a connection name (as defined in the 'mongodb_connections'
variable). If you want everything in a single database, collections do not need
to be configured and everything is written to the local default database using
the default collection names (given below). The dot is allowed in the name of
mongodb collections. Before the dot, mongodb_field_storage uses "fields_current"
or "fields_revision" and puts the entity type after.
 
MODULE                  COLLECTION NAMES
-----------------------------------------------------------
mongodb_block           "block"
mongodb_cache           "cache_bootstrap"
                        "cache_menu"
                        ...
mongodb_field_storage   "fields_current.node",
                        "fields_current.taxonomy_term"
                        "fields_revision.user"
                        ...
mongodb_queue           "queue."<queue name foo>
                        "queue."<queue name bar>
                        ...
mongodb_session         "session" (variable)
mongodb_watchdog        "watchdog" (variable)
-----------------------------------------------------------
 
In the following example, the watchdog collection will be handled by
the hypothetical connection alias 'logginghost'
 
EXAMPLE:
$conf['mongodb_collections'] = array('watchdog' => 'logginghost');
 
 
MODULE-SPECIFIC CONFIGURATION
------------
 
The following configuration variables are needed to use the features provided
by the the following sub-modules.
 
=> mongodb_cache
 
   EXAMPLE:
   # -- Configure Cache
   $conf['cache_backends'][] =
     'sites/all/modules/mongodb/mongodb_cache/mongodb_cache.inc';
   $conf['cache_default_class']         = 'DrupalMongoDBCache';
   # -- Don't touch SQL if in Cache
   $conf['page_cache_without_database'] = TRUE;
   $conf['page_cache_invoke_hooks']     = FALSE;
 
=> mongodb_session
 
   EXAMPLE:
   # Session Caching
   $conf['session_inc'] =
     'sites/all/modules/mongodb/mongodb_session/mongodb_session.inc';
   $conf['cache_session'] = 'DrupalMongoDBCache';
 
=> mongodb_field_storage
 
   EXAMPLE:
   # Field Storage
   $conf['field_storage_default'] = 'mongodb_field_storage';
 
TROUBLESHOOTING
------------
 
If installing mongodb_field_storage from an Install Profile:
 
* Do not enable the module in the profiles .info file.
* Do not include the module specific $conf variable in settings.php during
  install.
* In the profiles hook_install() function include
 
   module_enable(array('mongodb_field_storage'));
   drupal_flush_all_caches();