Eliminating SPOFs via Redundancy, Load Balancer Monitoring, & Self-Healing Systems
1 What is a Single Point of Failure (SPOF)?
A Single Point of Failure (SPOF) is any component in an architecture that, if it stops working or goes down, causes the entire system to fail.
⚠️ Vulnerable Architecture with Multiple SPOFs
Having SPOFs in your architecture gives malicious actors/hackers a single obvious target to bring down your entire application by focusing attack traffic (e.g. DDoS) directly at that single point.
2 3 Strategies to Avoid Load Balancer SPOFs
Adding multiple active/standby load balancers to your infrastructure setup.
💡 If one load balancer goes down, secondary load balancers immediately handle and route incoming traffic to backend servers without downtime.
Constantly perform automated health check probes on load balancers.
💡 Identifies failing load balancers instantly and stops sending traffic to unhealthy nodes until they recover and come back online.
Automatically spin up a new instance replacement if a load balancer crashes.
💡 Automated orchestration (e.g. Auto-Scaling Groups) detects failure and provisions a fresh load balancer node in place of the dead instance automatically.