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https://www.udemy.com/aws-certified-solutions-architect-professional/learn/v4/t/lecture/8593862?start=0

Create Health Checks – Step 1: Configure health check

• Route53 > Health checks
• Configure health check
  • Name
  • What to monitor
    • Endpoint
    • Status of other health checks (calculated health check)
    • State of Cloudwatch alarm
• Monitor an endpoint
  • Specify by:
    • IP
    • Domain name
      • Caution using this.  It will prevent you from creating a failover record in Route 53 since both IPs will point to the same domain name, even if they are different sites.
  • Protocol:
    • Http
    • Https (+$*)
  • Host Name: ___________
  • Port: 80
  • Path: (Default /)
• Advanced Config
  • Request Interval
    • Standard 30
    • Fast (10 seconds) (+$*)
  • Failure threshold: ____
    • Number of consecutive failures before marking ‘down’
  • String matching: Yes (+$*) / No
    • If Yes, must be located within first 5120 characters
    • Between 1 – 255 characters
  • Latency graphs: [ ] displays on health check page (+$*)
  • Invert health check status: [ ] (if you find the text and want to mark it ‘down’, i.e. “could not connect to database”
  • Health checker regions: select from list of locations.

Create health check – Step 2: Get notified

• Create alarm: Yes / No (YES!!)
  • CloudWatch then sends notification via SNS
• Send notification to:
  • Existing SNS Topic
  • New Topic
    • Topic Name: _____________
    • Email address: __________
      • Separate multiple addresses by comma, semicolon or space