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feat: Add AWS Elastic Beanstalk to deploy-on-aws plugin #171

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873fe68
feat(deploy-on-aws): add Elastic Beanstalk skill
azpaulp May 14, 2026
f648eb9
style: fix table alignment to pass markdownlint and dprint checks
azpaulp May 19, 2026
4daf999
Merge branch 'main' into feat/elastic-beanstalk-skill
azpaulp May 19, 2026
be03f4a
feat(deploy-on-aws): improve EB skill with IAM scanning hint and doc …
azpaulp May 19, 2026
116790a
feat(deploy-on-aws): address findings from live deployment test
azpaulp May 20, 2026
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2 changes: 2 additions & 0 deletions plugins/deploy-on-aws/skills/deploy/SKILL.md
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Expand Up @@ -57,9 +57,11 @@ to ensure patterns follow AWS recommendations.
- Don't ask "Lambda or Fargate?" - just pick the obvious one
- If genuinely ambiguous, then ask
- **Never recommend AWS App Runner** — it is in maintenance mode. Use ECS Express Mode instead.
- When user explicitly requests a managed application platform or signals low infrastructure involvement, route to Elastic Beanstalk

## References

- [Service defaults](references/defaults.md)
- [Security defaults](references/security.md)
- [Cost estimation patterns](references/cost-estimation.md)
- [Elastic Beanstalk skill](../elastic-beanstalk/SKILL.md)
52 changes: 38 additions & 14 deletions plugins/deploy-on-aws/skills/deploy/references/cost-estimation.md
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Expand Up @@ -11,20 +11,21 @@ Use the **awspricing** MCP server to get accurate cost estimates before generati

## Service Codes

| Service | Code | Notes |
| ----------------- | ------------------- | ---------------------------------------------- |
| Fargate | `AmazonECS` | Filter by `usagetype` containing "Fargate" |
| Aurora PostgreSQL | `AmazonRDS` | Filter: `databaseEngine` = "Aurora PostgreSQL" |
| Aurora MySQL | `AmazonRDS` | Filter: `databaseEngine` = "Aurora MySQL" |
| RDS PostgreSQL | `AmazonRDS` | Filter: `databaseEngine` = "PostgreSQL" |
| Amazon DocumentDB | `AmazonDocDB` | MongoDB-compatible managed database |
| ALB | `AWSELB` | Application Load Balancer |
| S3 | `AmazonS3` | Storage and requests |
| CloudFront | `AmazonCloudFront` | CDN distribution |
| Amplify | `AWSAmplify` | Hosting, build minutes |
| Lambda | `AWSLambda` | Requests and duration |
| DynamoDB | `AmazonDynamoDB` | On-demand or provisioned |
| Secrets Manager | `AWSSecretsManager` | Per secret per month |
| Service | Code | Notes |
| ----------------- | ------------------- | ------------------------------------------------ |
| Fargate | `AmazonECS` | Filter by `usagetype` containing "Fargate" |
| Aurora PostgreSQL | `AmazonRDS` | Filter: `databaseEngine` = "Aurora PostgreSQL" |
| Aurora MySQL | `AmazonRDS` | Filter: `databaseEngine` = "Aurora MySQL" |
| RDS PostgreSQL | `AmazonRDS` | Filter: `databaseEngine` = "PostgreSQL" |
| Amazon DocumentDB | `AmazonDocDB` | MongoDB-compatible managed database |
| ALB | `AWSELB` | Application Load Balancer |
| S3 | `AmazonS3` | Storage and requests |
| CloudFront | `AmazonCloudFront` | CDN distribution |
| Amplify | `AWSAmplify` | Hosting, build minutes |
| Lambda | `AWSLambda` | Requests and duration |
| DynamoDB | `AmazonDynamoDB` | On-demand or provisioned |
| Secrets Manager | `AWSSecretsManager` | Per secret per month |
| Elastic Beanstalk | N/A (free service) | No EB charge; query EC2, AWSELB for actual costs |

## Fargate Pricing

Expand Down Expand Up @@ -70,6 +71,19 @@ storage (GB-month), and I/O (standard config only).

- ~$130-400/month depending on load

## Elastic Beanstalk Pricing

Elastic Beanstalk itself has no service fee. Cost equals the underlying AWS
resources provisioned for the environment (EC2, ELB, EBS, CloudWatch).
Query awspricing MCP server for region-accurate estimates. Approximate
us-east-1 pricing:

**Dev web (1x t3.small + ALB):** ~$35-40/month
**Dev worker (1x t3.small, no ALB):** ~$15-20/month
**Production web (4x t3.medium + ALB, Multi-AZ):** ~$150-200/month

Include EBS volume costs (8GB gp3 default: ~$1/month per instance).

## Quick Reference Estimates

**Small web app (Fargate + Aurora Serverless v2 + ALB):**
Expand Down Expand Up @@ -97,6 +111,16 @@ storage (GB-month), and I/O (standard config only).
- Low traffic: ~$5-20/month
- High traffic: scales with requests

**Web app on Elastic Beanstalk:**

- Dev (1 instance + ALB): ~$35-40/month
- Production (load-balanced, Multi-AZ): ~$80-200/month

**Web app on EB + Aurora Serverless v2:**

- Dev: ~$80-130/month
- Production: ~$200-400/month

## Presenting Estimates

Always show:
Expand Down
34 changes: 22 additions & 12 deletions plugins/deploy-on-aws/skills/deploy/references/defaults.md
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Expand Up @@ -4,13 +4,14 @@ Default AWS service selections. Override only when user explicitly requests alte

## Compute

| App Pattern | Default | Override Trigger |
| ----------------------------------------------------- | -------------------- | ---------------------------------------- |
| Web framework (Django, Rails, Express, FastAPI, etc.) | Fargate + ALB | "serverless" → Lambda + API Gateway |
| Static site / SPA | Amplify Hosting | "S3" or "more control" → S3 + CloudFront |
| Background workers | Fargate | Short tasks (<15min) → Lambda |
| Scheduled jobs | EventBridge + Lambda | Long-running → EventBridge + Fargate |
| API-only (no web UI) | Fargate + ALB | "serverless" → API Gateway + Lambda |
| App Pattern | Default | Override Trigger |
| ----------------------------------------------------- | -------------------- | ----------------------------------------------------------------------------------------------------- |
| Web framework (Django, Rails, Express, FastAPI, etc.) | Fargate + ALB | "serverless" → Lambda + API Gateway; "managed platform" or "Elastic Beanstalk" → Elastic Beanstalk |
| Static site / SPA | Amplify Hosting | "S3" or "more control" → S3 + CloudFront |
| Background workers | Fargate | Short tasks (<15min) → Lambda; "managed platform" or "Elastic Beanstalk" → Elastic Beanstalk (Worker) |
| Scheduled jobs | EventBridge + Lambda | Long-running → EventBridge + Fargate |
| API-only (no web UI) | Fargate + ALB | "serverless" → API Gateway + Lambda; "managed platform" or "Elastic Beanstalk" → Elastic Beanstalk |
| Existing Heroku/Render/Railway app migrating to AWS | Elastic Beanstalk | "container orchestration" or "ECS" → Fargate + ALB; "serverless" → Lambda |

> **⚠️ App Runner is in maintenance mode** — AWS has moved App Runner to maintenance mode. Do **not** recommend App Runner for new workloads. Use **ECS Express Mode** instead.

Expand All @@ -30,6 +31,13 @@ or has existing CloudFront infrastructure.
Use `amplify_docs` topic in awsknowledge MCP for framework-specific guidance
(React, Next.js, Vue, Angular, etc.).

### Why Elastic Beanstalk for managed platform deployments

Elastic Beanstalk is an application management service: the user provides code,
AWS manages deployments, scaling, patching, monitoring, and health response.
Choose when the user wants production-grade reliability with the lowest ongoing
maintenance cost. Choose Fargate when the user wants direct container control.

## Database

| Data Pattern | Default (Dev) | Default (Prod) | Override Trigger |
Expand Down Expand Up @@ -81,11 +89,13 @@ type safety without requiring Python/Java knowledge. If user's repo already has

## Sizing (Dev vs Production)

| Component | Dev | Production |
| ----------------- | ------------- | -------------- |
| Fargate | 0.5 vCPU, 1GB | 1+ vCPU, 2+ GB |
| Aurora Serverless | 0.5-2 ACU | 2-16+ ACU |
| ALB | Single AZ OK | Multi-AZ |
| Component | Dev | Production |
| -------------------------- | ----------------- | ------------------------------ |
| Fargate | 0.5 vCPU, 1GB | 1+ vCPU, 2+ GB |
| Aurora Serverless | 0.5-2 ACU | 2-16+ ACU |
| ALB | Single AZ OK | Multi-AZ |
| Elastic Beanstalk (web) | 1x t3.small + ALB | 2-4x t3.medium + ALB, Multi-AZ |
| Elastic Beanstalk (worker) | 1x t3.small | 2-4x t3.medium |

Default to **dev sizing** unless user says "production", "prod", or "production-ready".

Expand Down
67 changes: 38 additions & 29 deletions plugins/deploy-on-aws/skills/deploy/references/security.md
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Expand Up @@ -56,13 +56,15 @@ When serving static content via CloudFront:

## VPC Placement

| Component | Default (Dev) | Default (Prod) |
| ----------------- | -------------------------------- | -------------------------------- |
| Fargate tasks | Private subnet + NAT Gateway | Private subnet + NAT Gateway |
| ALB | Public subnet | Public subnet |
| RDS/Aurora | Private subnet (no public IP) | Private subnet (no public IP) |
| Amazon DocumentDB | Private subnet (no public IP) | Private subnet (no public IP) |
| Lambda | VPC-attached if DB access needed | VPC-attached if DB access needed |
| Component | Default (Dev) | Default (Prod) |
| ------------------- | -------------------------------- | -------------------------------- |
| Fargate tasks | Private subnet + NAT Gateway | Private subnet + NAT Gateway |
| ALB | Public subnet | Public subnet |
| RDS/Aurora | Private subnet (no public IP) | Private subnet (no public IP) |
| Amazon DocumentDB | Private subnet (no public IP) | Private subnet (no public IP) |
| Lambda | VPC-attached if DB access needed | VPC-attached if DB access needed |
| EB web instances | Private subnet + ALB in public | Private subnet + ALB in public |
| EB worker instances | Private subnet + NAT Gateway | Private subnet + NAT Gateway |

### Why private subnets for compute

Expand All @@ -76,12 +78,14 @@ Use `awsknowledge` topic `vpc_patterns` for multi-AZ production layouts.

## IAM

| Pattern | Default |
| -------------------- | ------------------------------------------------ |
| Task/function roles | Least privilege (only resources explicitly used) |
| Service-linked roles | Use AWS-managed where available |
| Cross-service access | Via IAM roles, never access keys |
| Admin access | Not created (user manages separately) |
| Pattern | Default |
| -------------------- | ----------------------------------------------------------- |
| Task/function roles | Least privilege (only resources explicitly used) |
| Service-linked roles | Use AWS-managed where available |
| Cross-service access | Via IAM roles, never access keys |
| Admin access | Not created (user manages separately) |
| EB instance profile | Least privilege (S3 for deploys, CloudWatch, ECR if Docker) |
| EB service role | AWS-managed (aws-elasticbeanstalk-service-role) |

### Principle: Explicit grants only

Expand All @@ -93,13 +97,16 @@ Consult `awsiac` MCP for IAM policy patterns by service.

## Security Groups

| Component | Default Inbound | Default Outbound |
| ----------------- | ---------------------------- | ------------------ |
| ALB | 443 from 0.0.0.0/0 | Fargate SG only |
| Fargate | ALB SG only (on app port) | 443 (HTTPS), DB SG |
| RDS/Aurora | Fargate SG only (on DB port) | None |
| Amazon DocumentDB | Fargate SG only (port 27017) | None |
| Lambda (VPC) | None | 443, DB SG |
| Component | Default Inbound | Default Outbound |
| ------------------- | ------------------------------- | -------------------- |
| ALB | 443 from 0.0.0.0/0 | Fargate SG only |
| Fargate | ALB SG only (on app port) | 443 (HTTPS), DB SG |
| RDS/Aurora | Fargate SG only (on DB port) | None |
| Amazon DocumentDB | Fargate SG only (port 27017) | None |
| Lambda (VPC) | None | 443, DB SG |
| EB ALB | 443 from 0.0.0.0/0 | EB instances SG only |
| EB web instances | EB ALB SG only (on app port) | 443 (HTTPS), DB SG |
| EB worker instances | None (EB health agent is local) | 443 (HTTPS), DB SG |

### Why deny-by-default

Expand Down Expand Up @@ -156,15 +163,17 @@ Before deployment, run available checks:

## Logging & Monitoring

| Component | Default (Dev) | Default (Prod) |
| ---------------------- | ---------------------- | -------------------------- |
| CloudTrail | Account-level (shared) | Account-level (shared) |
| VPC Flow Logs | Disabled | Enabled (S3 destination) |
| ALB Access Logs | Disabled | Enabled (S3 destination) |
| Container logs | CloudWatch Logs | CloudWatch Logs |
| RDS/Aurora logs | Error log only | Error + slow query + audit |
| Amazon DocumentDB logs | Profiler (slow ops) | Profiler + audit |
| S3 Access Logs | Disabled | Enabled |
| Component | Default (Dev) | Default (Prod) |
| ---------------------- | ---------------------- | --------------------------------- |
| CloudTrail | Account-level (shared) | Account-level (shared) |
| VPC Flow Logs | Disabled | Enabled (S3 destination) |
| ALB Access Logs | Disabled | Enabled (S3 destination) |
| Container logs | CloudWatch Logs | CloudWatch Logs |
| RDS/Aurora logs | Error log only | Error + slow query + audit |
| Amazon DocumentDB logs | Profiler (slow ops) | Profiler + audit |
| S3 Access Logs | Disabled | Enabled |
| EB application logs | CloudWatch Logs agent | CloudWatch Logs + enhanced health |
| EB platform logs | Disabled | Enabled (CloudWatch Logs) |

### Why minimal logging in dev

Expand Down
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