GitHub Actions fails to authenticate when using OIDC for AWS with a custom role ARN
I just started working with I'm confused about I've encountered a strange issue with I tried several approaches but none seem to work. I'm currently facing an issue with my GitHub Actions workflow where I'm trying to set up OpenID Connect (OIDC) authentication to assume an IAM role in AWS for deploying my application. The workflow is configured to use the OIDC provider and a custom role ARN, but it fails with the error message: ``` Error: Failed to assume role: AccessDenied ``` I have set up the AWS IAM role with the trust policy allowing the GitHub OIDC provider, and I've verified that the role has the necessary permissions for the deployment task. Here’s the relevant part of my workflow configuration: ```yaml name: Deploy to AWS on: push: branches: - main jobs: deploy: runs-on: ubuntu-latest steps: - name: Checkout code uses: actions/checkout@v2 - name: Configure AWS Credentials uses: aws-actions/configure-aws-credentials@v1 with: role-to-assume: arn:aws:iam::123456789012:role/MyGitHubActionsRole aws-region: us-east-1 - name: Deploy run: aws s3 cp my-app/ s3://my-bucket/ --recursive ``` I’ve double-checked the role ARN and ensured that the GitHub Actions OIDC provider is correctly set up in AWS. Also, I’ve added the appropriate permissions for the role to allow access to the S3 bucket. However, I’m still encountering the `AccessDenied` error. I’ve tried adding a more permissive policy to the IAM role temporarily, but that also didn’t resolve the issue. Is there something specific I might be missing in the trust relationship or permissions that could be causing this? Any insights into debugging or configuration practices that could help would be greatly appreciated. Is there a better approach? I'm developing on macOS with Yaml. Is there a simpler solution I'm overlooking?