Installing MongoDB on Linux and Exporting Data to JSON

General
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Installing MongoDB on Linux and Exporting Data to JSON

1. Preparing the Repository File

To begin, create a repository file for MongoDB on your Red Hat system. This allows you to install MongoDB using yum.

sudo nano /etc/yum.repos.d/mongodb-org-3.2.repo

Add the following content to the file:

[mongodb-org-3.2]
name = MongoDB Repository
baseurl = https://repo.mongodb.org/yum/redhat/$releasever/mongodb-org/3.2/x86_64/
gpgcheck = 1
enabled = 1
gpgkey = https://www.mongodb.org/static/pgp/server-3.2.asc

2. Selecting the Installation Feature

Next, choose the appropriate installation feature based on your needs. Here are the available options:

  • mongodb-org: A metapackage that automatically installs the following components:
    • mongodb-org-server: Contains the mongod daemon and associated configuration and init scripts.
    • mongodb-org-mongos: Contains the mongos daemon.
    • mongodb-org-shell: Contains the mongo shell.
    • mongodb-org-tools: Contains the following MongoDB tools: mongoimport, bsondump, mongodump, mongoexport, mongofiles, mongooplog, mongoperf, mongorestore, mongostat, and mongotop.

To install all components, use the following command:

sudo yum install -y mongodb-org

If you only need the tools, run:

sudo yum install -y mongodb-org-tools

3. Exporting Data to JSON

Finally, use the mongoexport tool to export your data to JSON format. Here’s how you can do it:

sudo mongoexport -h $mongoDBUri --db $db_name -c $collection_name -q '{"$or": [{ "Alerts.FamilyFriendly.completed": false}, { "Alerts.GasAndSafety.completed": false}, { "Alerts.Breakfast.completed": false}, { "Alerts.SpokenLanguage.completed": false}, { "Alerts.LocationHighlights.completed": false}, { "Alerts.AccessibilityEnsure.completed": false}, { "Alerts.AirportShuttle.completed": false}, { "Alerts.RoomSize.completed": false}, { "Alerts.Renovations.completed": false}]} -F hotelId, alerts -o $OUTPUTDIR/contentScore-$$(date +%F)-e.json --jsonArray'

Replace $mongoDBUri, $db_name, $collection_name, and $OUTPUTDIR with your actual values.

Additional Notes

This guide is part of a series from Tencent Cloud, which focuses on media-sharing plans. If you’re interested in learning more or joining the community, feel free to reach out!

Published on: March 13, 2018