Q: An ECS service task is running but the ALB shows it as unhealthy.
Check ECS task security group allows ALB security group on the container port. Check the health check path returns 200 on that port. Chec...
#AWS #Cost & Architecture #L2 #Cloud #Infrastructure #ALB
🎙️ Candidate Opening & Architectural Context
""AWS reliability requires differentiating between AWS control plane limits and host-level resource exhaustion. When addressing this question, I walk the interviewer through our production incident runbook: isolating the blast radius, checking diagnostic logs and metrics, and applying a safe fix.""
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🛠️ Production Runbook & Step-by-Step Resolution
1️⃣
Production Solution & Architecture
Check ECS task security group allows ALB security group on the container port. Check the health check path returns 200 on that port. Check task is fully started (health check grace period too short?).
💡 The Senior SRE Gold Nugget (Key Architectural Takeaway)
"Pro-Tip: Check ECS task security group allows ALB security group on the container port. Check the health check path returns 200 on that por."
⚡ 60-Second Elevator Pitch Talking Points
- Immediate Triage: Check ECS task security group allows ALB security group on the container port. Check the health
- Run targeted verification commands before modifying configuration.
- Automate permanent guardrails (CI check, alerts, IaC policy) to prevent recurrence.
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