MongoDB production grade deployment

This article is about setting up a production ready MongoDB database with the following constraints:

1. It shouldn't not use Kubernetes
2. It can use Docker
3. 2 locations
4. Simple EC2 instances
5. Keep latency low across multiple regions
6. Automated deployments

Links used for this post:

• MongoDB Segmenting Data by Location
  https://docs.mongodb.com/manual/tutorial/sharding-segmenting-data-by-location/
• How to go to production with MongoDB
  https://severalnines.com/blog/how-go-production-mongodb-top-ten-tips
• 12 Tips for Going into Production with MongoDB
  https://www.mongodb.com/blog/post/12-tips-going-production-mongodb
• MongoDB ulimit configuration
  https://docs.mongodb.com/manual/reference/ulimit/
• MongoDB Production Notes
  https://docs.mongodb.com/manual/administration/production-notes/
• MongoDB Security checklist
  https://docs.mongodb.com/manual/administration/security-checklist/
• Network and Configuration Hardening
  https://docs.mongodb.com/manual/core/security-hardening/
• Operations Best Practices
  https://www.mongodb.com/blog/post/operations-best-practices-part-1-laying-groundwork-mongodb-high-performance
  https://www.mongodb.com/blog/post/operations-best-practices-part-2-managing-mongodb
  https://www.mongodb.com/blog/post/operations-best-practices-part-3-deploying-mongodb-confidence
• MongoDB on AWS. Guidelines and best practices
  https://d36cz9buwru1tt.cloudfront.net/AWS_NoSQL_MongoDB.pdf
• Replication
  https://docs.mongodb.com/manual/replication/
• Data Center Awareness
  https://n2ws.com/blog/ebs-snapshot/best-practices-nosql-databases-amazon-ec2
• Best Practices for Hosting NoSQL Databases on Amazon EC2
  https://n2ws.com/blog/ebs-snapshot/best-practices-nosql-databases-amazon-ec2
• Deploy a MongoDB Replica Set in a DevOps fashion style (Infrastructure as Code)
  https://medium.com/@cramirez92/deploy-a-mongodb-replica-set-in-a-devops-fashion-style-infrastructre-as-code-f631d7a0ad80