AWS CodeDeploy Management Skill

Analyze and manage AWS CodeDeploy applications, deployment groups, and deployment history.

MANDATORY: Discovery-First Pattern

Always list applications before querying specific resources.

Phase 1: Discovery

#!/bin/bash
export AWS_PAGER=""

echo "=== CodeDeploy Applications ==="
aws deploy list-applications --output text --query 'applications[]'

echo ""
echo "=== Application Details ==="
for app in $(aws deploy list-applications --output text --query 'applications[]'); do
  aws deploy get-application --application-name "$app" --output text \
    --query 'application.[applicationName,computePlatform,createTime]' &
done
wait

echo ""
echo "=== Deployment Groups ==="
for app in $(aws deploy list-applications --output text --query 'applications[]'); do
  for dg in $(aws deploy list-deployment-groups --application-name "$app" --output text --query 'deploymentGroups[]'); do
    aws deploy get-deployment-group --application-name "$app" --deployment-group-name "$dg" --output text \
      --query "deploymentGroupInfo.[\"$app\",deploymentGroupName,deploymentConfigName,computePlatform]" &
  done
done
wait

echo ""
echo "=== Deployment Configurations ==="
aws deploy list-deployment-configs --output text --query 'deploymentConfigsList[]'

Phase 2: Analysis

#!/bin/bash
export AWS_PAGER=""

echo "=== Recent Deployments ==="
for app in $(aws deploy list-applications --output text --query 'applications[]'); do
  deploy_ids=$(aws deploy list-deployments --application-name "$app" --max-items 5 --output text --query 'deployments[]')
  if [ -n "$deploy_ids" ]; then
    for dep_id in $deploy_ids; do
      aws deploy get-deployment --deployment-id "$dep_id" --output text \
        --query "deploymentInfo.[deploymentId,applicationName,deploymentGroupName,status,createTime]" &
    done
  fi
done
wait | head -25

echo ""
echo "=== Failed Deployments ==="
for app in $(aws deploy list-applications --output text --query 'applications[]'); do
  failed=$(aws deploy list-deployments --application-name "$app" \
    --include-only-statuses Failed --max-items 3 --output text --query 'deployments[]')
  for dep_id in $failed; do
    aws deploy get-deployment --deployment-id "$dep_id" --output text \
      --query "deploymentInfo.[deploymentId,applicationName,status,errorInformation.code,errorInformation.message]" &
  done
done
wait | head -15

echo ""
echo "=== Deployment Group Health ==="
for app in $(aws deploy list-applications --output text --query 'applications[]'); do
  for dg in $(aws deploy list-deployment-groups --application-name "$app" --output text --query 'deploymentGroups[]'); do
    aws deploy get-deployment-group --application-name "$app" --deployment-group-name "$dg" --output text \
      --query "deploymentGroupInfo.[applicationName,deploymentGroupName,lastSuccessfulDeployment.deploymentId,lastSuccessfulDeployment.status,lastSuccessfulDeployment.createTime]" &
  done
done
wait

Output Format

• Target ≤50 lines per output
• Use --output text --query for all commands
• Tab-delimited fields: AppName, DeploymentGroup, DeploymentId, Status
• Aggregate deployment counts by status for busy applications
• Never dump full revision details -- show deployment metadata only

Anti-Hallucination Rules

1. NEVER assume resource names — always discover via CLI/API in Phase 1 before referencing in Phase 2.
2. NEVER fabricate metric names or dimensions — verify against the service documentation or --help output.
3. NEVER mix CLI commands between service versions — confirm which version/API you are targeting.
4. ALWAYS use the discovery → verify → analyze chain — every resource referenced must have been discovered first.
5. ALWAYS handle empty results gracefully — an empty response is valid data, not an error to retry.

Counter-Rationalizations

Shortcut	Counter	Why
"I'll skip discovery and check known resources"	Always run Phase 1 discovery first	Resource names change, new resources appear — assumed names cause errors
"The user only asked for a quick check"	Follow the full discovery → analysis flow	Quick checks miss critical issues; structured analysis catches silent failures
"Default configuration is probably fine"	Audit configuration explicitly	Defaults often leave logging, security, and optimization features disabled
"Metrics aren't needed for this"	Always check relevant metrics when available	API/CLI responses show current state; metrics reveal trends and intermittent issues
"I don't have access to that"	Try the command and report the actual error	Assumed permission failures prevent useful investigation; actual errors are informative

Common Pitfalls

• Deployment status values: Created, Queued, InProgress, Baking, Succeeded, Failed, Stopped, Ready
• Compute platforms: Server (EC2/On-prem), Lambda, ECS -- each has different deployment group config
• Deployment configs: CodeDeployDefault.OneAtATime, HalfAtATime, AllAtOnce, and custom configs
• Rollback config: Check autoRollbackConfiguration -- can trigger on DEPLOYMENT_FAILURE or DEPLOYMENT_STOP_ON_ALARM
• Blue/Green vs In-Place: Check deploymentStyle -- Blue/Green requires load balancer config
• Target revision: Verify targetRevision in deployment group points to correct S3/GitHub location
• Instance health: For EC2, check instanceSummary with deployment ID for per-instance status