A formerly single-instance municipal intranet sits on one EC2 host. Patch reboots and host failures cause city-staff outages. Which reliability pattern best remediates this?
Select an answer to reveal the explanation.
Short Explanation
One intranet box is a single snow day away from every clerk staring at a blank screen. Put an ELB in front and stretch an ASG across AZs so patching and failures do not take City Hall offline.
Full Explanation
Load balancing plus multi-AZ Auto Scaling removes instance-level SPOFs and supports rolling replacement for municipal intranet apps. Larger EBS on one host does not provide compute HA. Manual Elastic IP moves are slow and error-prone. Same-AZ pairs without health checks still share AZ risk and weak failure detection.