05 ANSWER-SAFE INCIDENT BRIEFS
Docker and ECS incident practice
Practice registry, health-check, CPU quota, read-only filesystem, and image-architecture failures across Docker and ECS.
WHY THIS TRACK MATTERS
Debug the system, not the first plausible theory.
A running host does not prove a viable container. Responders must follow the image, runtime contract, resource controls, and orchestrator health model.
- Read container lifecycle and exit evidence
- Separate host health from container health
- Fix runtime contracts while preserving hardening
INCIDENT QUEUE
Choose the failure you want to face.
Each preview shows the symptom and baseline while keeping the diagnosis and recovery protected.
INC-038Intermediate
The registry rejects the node
ECR · ECS
new tasks remain in image-pull failure while old tasks runINC-039Intermediate
Health check calls a missing tool
Docker · ECS
containers serve traffic briefly but are repeatedly marked unhealthyINC-040Advanced
CPU quota becomes latency
Containers · Linux
container latency spikes while host CPU still has idle capacityINC-041Intermediate
Read-only means read-only
Docker · Security
a hardened container exits when creating a temporary fileINC-042Intermediate
The image speaks the wrong architecture
Docker · EC2
a container exits immediately with exec format errorFULL SIMULATION LIBRARY
Train the decision, not just the vocabulary.
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