ELB Instance Management

Manage ELB

• Access ELB by
  • AWS Management Console
  • AWS CLI
  • AWS SDKs
  • Query API
• Use EC2 Auto Scaling for scaling related needs
• Use Certificate Manager for HTTPS listener
• CloudWatch to monitor load balancer
• ECS — to start/stop/manage EC2 instances or Docker containers

ELB logging

• All ELBs integrate with Cloudwatch and Cloudtrail
• It shows constant and current data
• Get to know
  • network performance
  • requests peak
  • ability of ELB to manage requests

Important metrics for ELB

• Latency – indicates resource available in AZs
• Request count – details user’s requirement and when. Count of requests in a timeframe
• SpilloverCount – rejected requests as surge queue was full
• HealthyHostCount – count of healthy instances in ELB
• Surge queue length – requests are queued if ELB is unable to process them. It indicates how many requests are queued and for how long

Classic Load Balancers limits

• count of Load balancers/region: 20
• count of Listeners/load balancer: 100 †
• count of Security groups/load balancer: 5
• total count of Registered instances/load balancer: 1,000
• count of Subnets/AZ/load balancer: 1