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https://github.com/taichi/actions-cfn-diff
GitHub Actions to summarize diffs of CloudFormation stack
https://github.com/taichi/actions-cfn-diff
cdk cloudformation github-actions
Last synced: 3 months ago
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GitHub Actions to summarize diffs of CloudFormation stack
- Host: GitHub
- URL: https://github.com/taichi/actions-cfn-diff
- Owner: taichi
- License: mit
- Created: 2023-03-07T13:56:22.000Z (almost 2 years ago)
- Default Branch: main
- Last Pushed: 2024-04-14T01:37:03.000Z (9 months ago)
- Last Synced: 2024-04-15T00:44:28.308Z (9 months ago)
- Topics: cdk, cloudformation, github-actions
- Language: TypeScript
- Homepage:
- Size: 12.9 MB
- Stars: 6
- Watchers: 3
- Forks: 1
- Open Issues: 5
-
Metadata Files:
- Readme: README.md
- License: LICENSE
Awesome Lists containing this project
README
# actions-cfn-diff
This GitHub Actions outputs a Job Summary listing the resources included in the CloudFormation template.
## Precondition
- use [aws-actions/configure-aws-credentials@v4](https://github.com/aws-actions/configure-aws-credentials)
- setup IAM Role for describe Cloudformation stacks
- If you use the CDK lookup role, there is no need to create a new role for actions-cfn-diff. see [Assume role example](#assume-role-example)
The IAM policy required by this action is as follows
```
{
"Version": "2012-10-17",
"Statement": [
{
"Effect": "Allow",
"Action": [
"cloudformation:ListStacks",
"cloudformation:DetectStackDrift",
"cloudformation:DetectStackResourceDrift",
"cloudformation:DescribeStackDriftDetectionStatus",
"cloudformation:GetTemplate",
"cloudformation:ListStackResources"
],
"Resource": "*"
}
]
}
```
## Basic Usage Example
```
on:
pull_request:
name: Build on PullRequest
permissions:
id-token: write
contents: read
pull-requests: write
jobs:
build:
runs-on: ubuntu-latest
steps:
- uses: actions/checkout@v4
- uses: actions/setup-node@v4
with:
node-version: 20
- name: Configure AWS credentials
uses: aws-actions/configure-aws-credentials@v2
with:
aws-region: ap-northeast-1
role-to-assume: arn:aws:iam::0000000:role/deploy_from_github
- name: Set up AWS CDK
run: npm install -g aws-cdk
- name: Make Cloudformation Templates
run: cdk synth
- uses: taichi/actions-cfn-diff@v1
with:
aws-region: ap-northeast-1
```
See [action.yml](action.yml) for the full documentation for this action's inputs
and outputs.
## Assume role Example
```
name: report example
on:
pull_request:
permissions:
id-token: write
contents: read
pull-requests: write
jobs:
build:
runs-on: ubuntu-latest
steps:
- name: Configure AWS credentials
uses: aws-actions/configure-aws-credentials@v2
with:
aws-region: ap-northeast-1
role-to-assume: arn:aws:iam::000000000000:role/cdk-deploy-from-github
- uses: actions/checkout@v4
- uses: actions/setup-node@v4
with:
node-version: 20
cache: "npm"
- run: npm ci
- run: npm run build
- name: Set up AWS CDK
run: npm install -g aws-cdk
- name: Make Cloudformation Templates
run: cdk synth
- uses: taichi/actions-cfn-diff@v1
with:
aws-region: ap-northeast-1
role-to-assume: arn:aws:iam::000000000000:role/cdk-hnb659fds-lookup-role-000000000000-ap-northeast-1
```
## Report Examples
### [Before deploy](https://github.com/taichi/actions-cfn-diff-example/actions/runs/4392834414)
### [Resource update summary](https://github.com/taichi/actions-cfn-diff-example/actions/runs/4394981752)
### [Resource update summary with drift](https://github.com/taichi/actions-cfn-diff-example/actions/runs/4395427399)
## Related Tools
- [CDK diff commenter Action](https://github.com/tsuba3/cdk_plan_action)
- [cdk-notifier](https://github.com/karlderkaefer/cdk-notifier)