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Module 3 - Integrated Services

Application load balancer

Balance incoming traffic to the correct application. Additional protocols, access logs, cloud watch, health checks.

  • Listener directs to targets or groups

Auto Scaling

Helps ensure correct number of EC2 instances available to handle load. Automatically scale in or out depending on load based on your settings.

  • launch configuration: EC2 types
  • auto scaling group: Where & how - vpc, min, max desired
  • auto scaling policy: When to scale up/down - dynamic w/ cloudwatch or scheduled

Route53

DNS service (domain name system), translating "example.com" into "54.85.178.219".

Types of DNS routing:

  • Simple
  • Weighted round robin
  • Geo-location
  • Latency
  • Failover
  • Multi-value answer

RDS - Relations Database Services

Managed service to setup databases. You manage the data, AWS the rest. Ability to configure Multi-AZ for availability++ & durability++.

Challenges with traditional DBs: Maintenance, patching, backups, availability, scalability, security

Database instance: Type of database (MySQL, Aurora, SQL Server, PostgreSQL, mariaDB, oracle), underlying cpu/memory

  • Read replica: Updates to the database are automatically replicated in the secondary instance read replica. Can be created in a different region for disaster resilience and better global availability

AWS Lambda

Event driven, serverless compute service. No servers to manage, continues scaling, pay for each second used. Connective tissue between AWS services.

  • Example use cases: Auto backups, processed items uploaded to buckets, serverless websites, IoT

Elastic Beanstalk

PaaS. Easily provision resources for your application.

AWS SNS - Simple Notification Service

Send messages/emails/notifications to individuals/groups based on events.

CloudWatch

Monitor AWS resources and applications in real time. CPU, data transfer, Disk IO, log files, set alarms, react to changes.

  • Automatically stop instance, scale in/out or send messages

CloudFormation

Simplifies task of repeatedly creating groups of related resources by using JSON/YAML template files. Infrastructure through code.

  • Stacks are the resources generated & unit of deployment. Create separate stacks.
  • Must have permissions to all the underlying hardware being processed