Book Image

Learn MongoDB 4.x

By : Doug Bierer
Book Image

Learn MongoDB 4.x

By: Doug Bierer

Overview of this book

When it comes to managing a high volume of unstructured and non-relational datasets, MongoDB is the defacto database management system (DBMS) for DBAs and data architects. This updated book includes the latest release and covers every feature in MongoDB 4.x, while helping you get hands-on with building a MongoDB database app. You’ll get to grips with MongoDB 4.x concepts such as indexes, database design, data modeling, authentication, and aggregation. As you progress, you’ll cover tasks such as performing routine operations when developing a dynamic database-driven website. Using examples, you’ll learn how to work with queries and regular database operations. The book will not only guide you through design and implementation, but also help you monitor operations to achieve optimal performance and secure your MongoDB database systems. You’ll also be introduced to advanced techniques such as aggregation, map-reduce, complex queries, and generating ad hoc financial reports on the fly. Later, the book shows you how to work with multiple collections as well as embedded arrays and documents, before finally exploring key topics such as replication, sharding, and security using practical examples. By the end of this book, you’ll be well-versed with MongoDB 4.x and be able to perform development and administrative tasks associated with this NoSQL database.
Table of Contents (22 chapters)
1
Section 1: Essentials
5
Section 2: Building a Database-Driven Web Application
9
Section 3: Digging Deeper
13
Section 4: Replication, Sharding, and Security in a Financial Environment
14
Working with Complex Documents Across Collections

Understanding the docker-compose.yml file

As in Chapter 13, Deploying a Replica Set, we start by defining a docker-compose.yml file that defines the five containers we use in this illustration to model a sharded cluster: one container to host the config server, one to host the mongos instance, and three to represent shards. At the top of the file, we place the version directive.

This informs Docker Compose that this file follows directives compatible with version 3:

version: "3"

We then define services, starting with the first member of the sharded cluster. In this definition, you can see that we assign a name of learn-mongo-shard-1 to the Docker container and a hostname of shard1. The image directive defines a name for the image (ultimately derived from the official MongoDB Docker image) created by Docker Compose, as shown here:

services:
learn-mongodb-shard-1:
container_name: learn-mongo-shard-1
hostname: shard1
image: learn-mongodb/shard-1

Under volumes...