MongoDB CLuster Service

Custom docker image with automatic clustering. Beware!!: The service can only be initilize once. If you remove the containers, you have to delete all volumes associated with the service.

Table of Contents

1. Setup MongoDB CLuster
   
   • Docker
     
     • Prepare variables
       
     • Create cluster key
       
       1. One line
          
       2. Manually
          
     • Start MongoDB cluster service
       

Setup MongoDB CLuster

Docker

Prepare variables:

cp .env.example .env

Edit the .env file. change the default username and password.

Create cluster key:

Mongo nodes need to share the same key to be able to authenticate each-other

One line:

echo "MONGODB_CLUSTER_KEY="$(openssl rand -base64 756 | sed -z 's/\n/\\n/g') >> .env

if the above failes to create the env variable in .env file, you have to do it in multiple steps.

Manually

1. Create key file:

openssl rand -base64 756 > mongo_cluster_key

2. Edit Key:

vim ./mongo_cluster_key

replace all new-line with \n

3. Step 3: Create a variable in .env file and use the string from Step 2 as it's value

MONGODB_CLUSTER_KEY=####-Single line encrypted key-####

Start MongoDB cluster service:

docker compose up -d