AWS Classroom Series – 06/Jan/2021

Hosting Databases in AWS

  • To host Database engines in AWS we have two options
    • Hosting the Database on Amazon EC2 Servers
    • Hosting the Database on Amazon RDS

Hosting the Database on Amazon EC2 Servers

Preview

  • You should choose ec2 if
    • you need full control over the database instances
    • You need OS access
    • You need full controlover backups, replications & clustering
    • Your RDBMS engine features and options are not available in RDS
  • To Create Database from EC2 instances
    • Option 1: Take a plain os like ubuntu, redhat, windows and install the db engine
    • Option 2: There are third party vendors who provide the pre installed database for you Preview Preview Preview

Hosting the Database using Amazon RDS

Preview

  • You can choose this model if
    • You want focus on tasks that bring value to your business
    • you dont want to manage the database (backups etc)
    • You wnat to focus on high-level tuning tasks and schema optimizations
    • You lack in-house expertise to manage databases
    • You want automated backup and recovery
    • You want multi-az/region replication
  • Amazon RDS supports the following Database Engines
    • Microsoft SQL Server
    • Oracle
    • Postgres
    • mySql
    • maria db
    • Aurora for mySql
    • Aurora for postgres
  • Not all the versions are available.
    • mysql versions Preview
    • Similarly explore other engine versions

Understand RDS creation

  • Lets first try to understand about aws network (vpc) Preview
  • Now when we create a rds instance should we give one az or more that az
  • Should i have some kind of network firewall rds just like ec2 instance (security groups)
  • So to create a database in rds we need
    • db subnet group: what are different subnets in which rds can be created
    • db security group : what ips should be allowed to access database
  • Now in AWS for every region we have default vpc (network created) Preview Preview Preview Preview Preview
  • Now lets create a security group which will open 3306 port from any where so that we can attach to mysql rds Preview Preview Preview Preview
  • Now lets create a DB Subnet group which allows the following az
    • us-west-2a
    • us-west-2b
    • us-west-2c
  • Navigate to RDS Preview Preview Preview Preview Preview
  • In AWS we can configure High Availability using two architectures
    • Single-AZ Deployment
    • Multi-AZ Deployment
  • Next Steps:
    • Lets use the created DB Subnet and security group to create an rds mysql instance
    • We need to understand instance sizes
    • We will also be install some client softwares to connect to database
    • We will explore public connectivity, tunneling connectivity and private connectivity to databases.

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