Aws Spot Strategy

aws autoscaling describe-auto-scaling-groups --output json

Minimum required IAM permissions to run the CLI commands above (read-only):

{
  "Version": "2012-10-17",
  "Statement": [{
    "Effect": "Allow",
    "Action": ["ec2:DescribeInstances", "ec2:DescribeSpotPriceHistory", "autoscaling:Describe*", "ce:GetCostAndUsage"],
    "Resource": "*"
  }]
}

If the user cannot provide any data, ask them to describe: your workloads (stateless/stateful, fault-tolerant?), current EC2 instance types, and approximate monthly EC2 spend.

Steps

1. Classify workloads: fault-tolerant (Spot-safe) vs stateful (Spot-unsafe)
2. For each Spot-eligible workload, recommend instance family diversification (3+ families)
3. Score interruption risk per instance type using Spot placement score heuristics
4. Design fallback chain: Spot → On-Demand → Savings Plan
5. Generate Auto Scaling Group / Karpenter configuration

Output Format

• Workload Eligibility Matrix: workload, Spot-safe (Y/N), reason
• Spot Fleet Recommendation: instance families, AZs, allocation strategy
• Interruption Risk Table: instance type, region, estimated interruption frequency
• Fallback Architecture: layered purchasing strategy per workload
• Savings Estimate: on-demand cost vs Spot cost with % savings
• Karpenter NodePool YAML (if EKS context detected)

Rules

• Always recommend at least 3 instance families for Spot diversification
• Flag stateful workloads (databases, single-replica services) as NOT Spot-safe
• Recommend capacity-optimized allocation strategy over lowest-price
• Include interruption handling: graceful shutdown hooks, checkpoint patterns
• Never ask for credentials, access keys, or secret keys — only exported data or CLI/console output
• If user pastes raw data, confirm no credentials are included before processing