mongodb_conn

#!/usr/bin/env python3
"""
=head1 NAME

mongodb_conn - MongoDB Connection Count Plugin

=head1 APPLICABLE SYSTEMS

MongoDB 3.X and 4.X with pymongo installed.

=head1 CONFIGURATION

Default for host is 127.0.0.1 and port 27017 and will work without being defined:

    [mongodb_conn]
    env.host 127.0.0.1
    env.port 27017
    env.username user
    env.password P@55w0rd

or

    [mongodb_conn]
    env.MONGO_DB_URI mongodb://user:passwd@127.0.0.1:27017

=head1 AUTHOR

Alban Espie-Guillon <alban.espie@alterway.fr>

based on Stefan Andersen <stefan@stefanandersen.dk> work.

=head1 LICENSE
The Beer Ware License (Revision 42)
<alban.espie@alterway.fr> wrote this file. As long
as you retain this notice you can do whatever you want
with this stuff. If we meet some day, and you think
this stuff is worth it, you can buy me a beer in return.

SPDX-License-Identifier: Beerware

=cut
"""

import os
import sys
import pymongo


def _get_connections():
    if 'MONGO_DB_URI' in os.environ:
        conn = pymongo.MongoClient(os.environ['MONGO_DB_URI'])
    else:
        host = os.environ.get('host', '127.0.0.1')
        port = os.environ.get('port', 27017)
        username = os.environ.get('username', '')
        password = os.environ.get('password', '')
        conn = pymongo.MongoClient(host, int(port))
        if username:
            connAuth = conn['admin']
            connAuth.authenticate(username, password)

    """ cli : db.serverStatus().connections """
    conn_status = conn.admin.command("serverStatus")['connections']
    return conn_status


def run():
    connections = _get_connections()
    for c, v in connections.items():
        print(str(c) + ".value " + str(v))


def config():
    print("""
graph_title MongoDB Connections Count
graph_vlabel Connections count
graph_category %s
graph_args --base 1000 -l 0
current.label current
current.draw AREASTACK
available.label available
available.draw AREASTACK
active.label active
active.draw AREASTACK
""" % os.getenv('graph_category', 'db'))


if __name__ == "__main__":
    if len(sys.argv) > 1 and sys.argv[1] == "config":
        config()
    else:
        run()