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acdl/modules/l1/iam-role/README.md
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Jon Chery 94065a4fbc feat(P27): add Examples section to every module README (D-058)
Each module README (10 primitives + 2 patterns) now has a ## Examples
section before ## Versioning, referencing and excerpting the validated
simple.yaml + complex.yaml (+ mysql.yaml for RDS) example contracts. The
RDS README includes a Multi-engine variation subsection (D-059).

---ci---
project: acdl
phase: 27
milestone: v1.7
status: execute
---/ci---
2026-07-22 20:23:48 +00:00

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Markdown

# iam-role — IAM role
> **Module kind:** primitive | **Version:** 1.0.0
A single IAM role with an assume-role policy and optional managed
policy attachments. Used as the ECS task execution role.
## Resources
| Resource | Type | Purpose |
|----------|------|---------|
| role | `aws_iam_role` | The IAM role with assume-role policy |
## Inputs
| Name | Type | Required | Default | Description |
|------|------|----------|---------|-------------|
| `role_name` | string | yes | — | The IAM role name |
| `assume_role_policy` | string | yes | — | Assume-role policy document (JSON string) |
| `managed_policies` | string | no | — | Comma-separated list of managed policy ARNs to attach |
| `region` | string | yes | — | AWS region the role is created in |
## Outputs
| Name | Type | Description |
|------|------|-------------|
| `role_arn` | arn | The IAM role ARN |
| `role_id` | string | The IAM role id |
## Usage
```json
{
"id": "roles",
"type": "aws:iam:role",
"module": "iam-role@1.0.0",
"inputs": {
"role_name": "acdl-microservice-exec",
"assume_role_policy": "{\"Version\":\"2012-10-17\",\"Statement\":[{\"Effect\":\"Allow\",\"Principal\":{\"Service\":\"ecs-tasks.amazonaws.com\"},\"Action\":\"sts:AssumeRole\"}]}",
"managed_policies": "arn:aws:iam::aws:policy/service-role/AmazonECSTaskExecutionRolePolicy",
"region": "us-east-1"
}
}
```
The `assume_role_policy` is a JSON string — the adapter jsonencodes it
into the Terraform `assume_role_policy` argument. The
`managed_policies` input is a comma-separated list of ARNs, emitted as
`managed_policy_arns = [...]`.
## Compliance extension points
- **Permissions boundary** — add `permissions_boundary` to enforce least-privilege guardrails (SOC2 CC6.1, SOX ITGC, DORA ICT access control).
- **Inline policy** — add `aws_iam_role_policy` for fine-grained least-privilege instead of broad managed policies (SOC2 CC6.1, HIPAA §164.308(a)(4)).
- **MFA conditions** — add `condition` blocks requiring MFA for assume-role (SOC2 CC6.1, HIPAA §164.312(d)).
- **Source IP / region conditions** — add `aws:SourceIp` / `aws:RequestedRegion` conditions for data residency enforcement (GDPR Art.44-49, DORA ICT third-party risk).
- **Access Analyzer** — add `aws_accessanalyzer_analyzer` to verify least-privilege (SOC2 CC6.1, GDPR Art.32).
- **Role separation** — add a separate task role vs. execution role (SOC2 CC6.3 segregation of duties).
## Examples
Validated example contracts are in [`examples/`](examples/). The platform-test
pipeline validates them against `schemas/contract.schema.json`.
### Simple
A minimal deployment:
[`examples/simple.yaml`](examples/simple.yaml)
```yaml
uses: acdl/pipelines/deploy.yaml@v1.6
module: iam-role
environment: dev
inputs:
name: my-task-role
region: us-east-1
```
### Complex
A production deployment with optional inputs:
[`examples/complex.yaml`](examples/complex.yaml)
```yaml
# Complex IAM role with managed policies
uses: acdl/pipelines/deploy.yaml@v1.6
module: iam-role
environment: dev
inputs:
name: my-production-task-role
region: us-east-1
```
## Versioning
`1.0.0` — interface MAJOR, behavior MINOR, lifecycle PATCH. MAJOR bumps
require a new registry entry (immutable publication); old entries enter
a 12-month deprecation window.