Load Balancers Flashcards
Two types of load balancers
Global and regional
Global Load Balancers
HTTP(S), SSL proxy, and TCP proxy
Why use Global Load Balancer
Users and instances globally distributed, users need access to same apps and content, and want to provide access using single anycast IP addresses
Regional Load Balancers
Internal TCP/UDP, Network TCP/UDP, Internal HTTP(S)
Managed Instance Group Definition
Collection of identical VM instances controlled as a single entity using an instance template
Managed Instance Group - What happens on crash
Automatically recreates the instance
Managed Instance Group - Regional Vs Zonal
Recommend Regional in case zonal failure
Managed Instance Group - Type
Stateless - Website frontend, image processing, or batching
Stateful - Databases or legacy apps
Autoscaling Policies by…
Increase/Decrease in load:
CPU utilization
Load Balancing Capacity
Monitoring Metrics
Queue-based metrics
