Load balancers

High level architecture

VMs --> Instance group --> backend service --> fowarding rules


Different type of backends

  • Instance groups (managed or unmanaged) containing virtual machine (VM) instances.
  • Zonal NEG
  • Serverless NEG
  • Internet NEG

Backends service

named ports

  • Required for
    • Internal and global HTTP(S) Load Balancing
    • SSL Proxy Load Balancing
    • TCP Proxy Load Balancing
  • Not required for
    • Internal TCP load balancer
    • Network loadbalancer