Building Python MongoDB Driver

Building Python MongoDB Driver

The instructions provided below specify the steps to build Python MongoDB Driver (PyMongo) version 3.4.0 on IBM z Systems for RHEL 6.8/7.1/7.2/7.3, SLES 11-SP4/12/12-SP1/12-SP2 and Ubuntu 16.04/16.10.

General Notes:

• When following the steps below please use a standard permission user unless otherwise specified.

• A directory /<source_root>/ will be referred to in these instructions, this is a temporary writable directory anywhere you'd like to place it.

##Step 1: Building and Installing PyMongo ####1.1) Install dependencies

• RHEL 6.8/7.1/7.2/7.3

sudo yum install git openssl openssl-devel pyOpenSSL

• SLES 11-SP4

sudo zypper install git python-xml python-openssl openssl-devel openssl

• SLES 12/12-SP1/12-SP2

sudo zypper install git python-xml

• Ubuntu 16.04/16.10

sudo apt-get update
sudo apt-get install git openssl libssh-dev python python-openssl python-setuptools
sudo easy_install pip  

####1.2) Create a working directory with write permission to use as an installation workspace

mkdir /<source_root>/
cd /<source_root>/

####1.3) Download source code

git clone git://github.com/mongodb/mongo-python-driver.git pymongo
cd pymongo
git checkout 3.4.0

####1.4) Configure and install

sudo python setup.py install

####1.5) Execute test cases

Access to MongoDB Server is required to execute test cases.

• If MongoDB Server is running on same machine then execute the following:

sudo python setup.py test

• If MongoDB Server is running on remote machine, then create a test_cases.sh file with following content:

export DB_IP=<MongoDB_Server_IP>
python setup.py test

• Give execute permission to test_cases.sh file and execute it as follows:

chmod +x test_cases.sh
sudo ./test_cases.sh

Note: Execute the below steps only in case of test case failures

• If test_bad_encode test case fails with error: "TypeError: encoder expected a mapping type but got: {'a': {...}}", or if test_get_last_version test case fails with AssertionError then it might be an issue with Python version. Try installing Python 2.7.9 using following steps and re-run the test cases.

Install dependencies as follows

• RHEL 6.8/7.1/7.2/7.3

sudo yum install tar xz wget zlib-devel

• SLES 11-SP4/12/12-SP1/12-SP2

sudo zypper install tar xz wget zlib-devel

• Follow the steps in Python recipe to install Python

• If MongoDB Server is running on same machine then set the build location in path variable

export PATH=<python-build-location>/bin:$PATH

• If MongoDB Server is running on remote machine then put the "export PATH=/bin:$PATH" in first line of test_cases.sh file.

export PATH=<python-build-location>/bin:$PATH
export DB_IP=<MongoDB_Server_IP>
python setup.py test

Re-run test cases as mentined above.

####1.6) Verify installation

 python

You should get something like the following result

 Python 2.3.4 (#1, Jan  9 2007, 16:40:09)
 [GCC 3.4.6 20060404 (Red Hat 3.4.6-3)] on linux2
 Type "help", "copyright", "credits" or "license" for more 	information.
 >>>

Now verify that PyMongo has been installed

 >>> import pymongo

If you get no errors from this import statement, then PyMongo has been installed successfully.To exit from python prompt either use ctrl + d or type exit().

Step 2:Basic validation test

The example code section given below is used to perform a basic test to ensure that the Python MongoDB Driver is working as expected, and can connect to, modify and query a MongoDB server.

####2.1) Prerequisites

Python MongoDB Driver needs access to a running MongoDB server, either on your local server or a remote system. The following commands are an example of how to start up a MongoDB server and then connect to it with the client shell, but note that MongoDB has not been installed as part of these instructions, and typically you would be running MongoDB on a remote server.

mongod > /tmp/mongodb.log &
mongo --host localhost 

Which would typically give a command prompt such as

MongoDB shell version: 2.4.10 connecting to: localhost:27017/test > 

The example code below will need to be modified to use your remote server hostname or IP address instead of "localhost", if you are attempting to connect to your own (remote) server.

####2.2) The Test Code

Create a file named test.py with the content shown below. This code connects to a MongoDB server, inserts some documents and then queries the database to read them back and display them.

Remember, if you are connecting to a remote server then you need to substitute the localhost with the hostname or IP address of the MongoDB server.

import pprint
import pymongo

from pymongo import MongoClient

server="localhost";
database="ibm_test_db";
collection="mongodb_python_driver";

serverdb="mongodb://" + server + ":27017/";

client = MongoClient(serverdb)

db = client[database];

db[collection].drop();

header = {"company": "IBM",
      "project": "MongoDB Driver",
      "language": "python",
      "version": "3.4.0"};

db[collection].insert_one(header);

for i in range (0, 3):
    doc = {"line": i};
    db[collection].insert_one (doc);

for gotdoc in db[collection].find():
    pprint.pprint(gotdoc);

####2.3) Run Test Script

python test.py

The output from the above should look similar to:

{u'_id': ObjectId('560eb1ff051ba90001d927a0'),
u'company': u'IBM',
u'language': u'python',
u'project': u'MongoDB Driver',
u'version': u'3.4.0'}
{u'_id': ObjectId('560eb1ff051ba90001d927a1'), u'line': 0}
{u'_id': ObjectId('560eb1ff051ba90001d927a2'), u'line': 1}
{u'_id': ObjectId('560eb1ff051ba90001d927a3'), u'line': 2}

##References:

• Python MongoDB installation