Get mongod rs.status() results from a python script

Question

For monitoring purposees I try to get the output of the following shell commands but from a python script

:mongo --port 27040
-> enters mongodb shell
:rs.status()

see image

The result of the command is json that I want to access outside the mongo shell to write it to a file, I can run other command in python using pymongo like:

import json, os  
# load mongo library
current_dir = os.path.dirname(os.path.realpath(__file__))
os.sys.path.append(os.path.join(current_dir, 'pymongo-3.7.1-cp27-cp27m-manylinux1_x86_64.whl'))

from bson import json_util
from pymongo import MongoClient
from pymongo.errors import OperationFailure, ConnectionFailure

#connection settings
port = 27040
hostname = "localhost"
#default database used by mongodb
database = "test"

try:
    # connect to the database
    client = MongoClient(hostname,int(port))
    db = client[database] # select the database
    serverstats = db.command("serverStatus")
    serialized_serverstats = json.dumps(serverstats, default=json_util.default)
    print serialized_serverstats
except Exception as e:
    print("Unhandled Error is %s" % e)

This runs something equal to running db.serverStatus() in the mongo shell. But how do I run rs.status() form inside a python script?

Answer 1

You should do it like this:

db = client ['admin']
db_stats = db.command({'replSetGetStatus'  :1})

If you want to check what's the underlying command of any shell command:

> rs.status
function () {
    return db._adminCommand("replSetGetStatus");
}
>