MongoDB ReplicaSet Setup

This repository contains the necessary scripts and configurations to set up a MongoDB ReplicaSet using Docker. The setup includes initializing the ReplicaSet, creating a database user, and configuring MongoDB to run with authentication and a key file for secure communication between replica set members.

Prerequisites
Configuration
Usage
Scripts
Dockerfile

Prerequisites

Docker installed on your machine.
A Docker registry to push the built image (optional).
Environment variables configured for MongoDB setup.

Configuration

The following environment variables are required for the setup:

Variable	Type	Description
`MONGO_DOMAIN`	string	The domain or IP address of the MongoDB instance.
`MONGO_PORT`	number	The port on which MongoDB will run.
`MONGO_REPLICA_SET_NAME`	string	The name of the MongoDB ReplicaSet.
`MONGO_INITDB_DATABASE`	string	The initial database to create.
`MONGO_INITDB_ROOT_USERNAME_FILE`	secret	Path to the file containing the root username.
`MONGO_INITDB_ROOT_PASSWORD_FILE`	secret	Path to the file containing the root password.
`MONGO_PROJECTDB_USERNAME_FILE`	secret	Path to the file containing the project database username.
`MONGO_PROJECTDB_PASSWORD_FILE`	secret	Path to the file containing the project database password.
`MONGO_KEY_FILE_PATH`	secret	Path to the key file for MongoDB authentication.
`MONGO_KEY_FILE_TARGET_PATH`	secret	Target path where the key file will be copied inside the container.

Usage

Clone the repository:

git clone https://git.n08i40k.ru/n08i40k/mongodb-replset.git
cd mongodb-replset

Build the Docker image:
```
docker build -t mongodb-replset .
```

Run the Docker container:

docker run -d \
  --name mongodb-replset \
  -e MONGO_DOMAIN=mongodb.example.tdl \
  -e MONGO_PORT=27017 \
  -e MONGO_REPLICA_SET_NAME=rs0 \
  -e MONGO_INITDB_DATABASE=example \
  -e MONGO_INITDB_ROOT_USERNAME_FILE=/run/secrets/db_root_username \
  -e MONGO_INITDB_ROOT_PASSWORD_FILE=/run/secrets/db_root_password \
  -e MONGO_PROJECTDB_USERNAME_FILE=/run/secrets/db_username \
  -e MONGO_PROJECTDB_PASSWORD_FILE=/run/secrets/db_password \
  -e MONGO_KEY_FILE_PATH=/run/secrets/db_key_file \
  -e MONGO_KEY_FILE_TARGET_PATH=/root/db_key_file \
  mongodb-replset

Scripts

`rs-init.sh`

This script initializes the MongoDB ReplicaSet and creates a user with read-write permissions on the specified database.

`start.sh`

This script is the entry point for the Docker container. It checks if the ReplicaSet is already initialized and, if not, initializes it using rs-init.sh. It also copies the key file to the specified location and starts the MongoDB instance with the appropriate configuration.

Dockerfile

The Dockerfile is based on the official MongoDB image and includes the necessary scripts and configurations to set up a MongoDB ReplicaSet. It sets the working directory, copies the scripts, and defines the entry point and command to start MongoDB with the required options.

Contributing

Contributions are welcome! Please open an issue or submit a pull request for any improvements or bug fixes.

License

This project is licensed under the MIT License. See the LICENSE file for details.

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