aws_appsync_graphql_api resource doesn't support LAMBDA authentication type

[rkeiii]

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Description

The aws_appsync_graphql_api resource is missing the new LAMBDA authentication_type that was released on July 30th 2021. This new authentication system makes it much simpler to add entirely custom auth to AppSync (no Cognito/etc. needed).

I might be interested in adding support for this but I've never contributed to this codebase before.

Feature release blog post: https://aws.amazon.com/blogs/mobile/appsync-lambda-auth/

New or Affected Resource(s)

• aws_appsync_graphql_api

[bengiddins]

Suggested implementation (I need this too!):

additional_authentication_provider {
  authentication_type = "AWS_LAMBDA"

  lambda_config {
    region = "..."
    function_arn = "..."
    auth_ttl = "..."
    token_regex = "..."
  }
}

Based on AppSync's additional authorization provider UI for AWS Lambda authorization mode.

In the meantime, anyone who needs to use this by manually updating their AppSync configuration through the console can use the following inside of their aws_appsync_graphql_api resource declaration:

  lifecycle {
    ignore_changes = [additional_authentication_provider]
  }

[Pharb]

I am working on a PR for this.

Usage example:

resource "aws_appsync_graphql_api" "example" {
  authentication_type = "AWS_LAMBDA"
  name                = "example"

  lambda_authorizer_config {
    authorizer_uri = "arn:aws:lambda:us-east-1:123456789012:function:custom_lambda_authorizer"
  }
}

resource "aws_lambda_permission" "appsync_lambda_authorizer" {
  statement_id  = "appsync_lambda_authorizer"
  action        = "lambda:InvokeFunction"
  function_name = "custom_lambda_authorizer"
  principal     = "appsync.amazonaws.com"
  source_arn    = aws_appsync_graphql_api.example.arn
}

[digitalfiz]

How can we get #20857 pushed over that finish line?

[6be709c0]

Any update, would love to use this feature :)

[filipjakubowski]

I am waiting for this change. At this moment I am using AWS CLI command in my CI/CD post terraform but still when working form console by myself I find this being a pain.

 aws appsync update-graphql-api \
            --no-cli-auto-prompt \
            --name "$PROJECT_NAME" \
            --api-id "$APPSYNC_ID" \
            --authentication-type "AWS_LAMBDA" \
            --lambda-authorizer-config "{ \"authorizerResultTtlInSeconds\": 300, \"authorizerUri\": \"$LAMBDA_AUTH_APPSYNC_ARN\" }"

[6be709c0]

thank you @filipjakubowski, based on your cli, I'm using AWS_LAMBDA as second auth type:

          aws appsync update-graphql-api \
          --no-cli-auto-prompt \
          --name "$PROJECT_NAME" \
          --authentication-type "API_KEY" \
          --api-id "$APPSYNC_ID" \
          --region us-east-1 \
          --additional-authentication-providers "[ { \"authenticationType\":\"AWS_LAMBDA\", \"lambdaAuthorizerConfig\": { \"authorizerResultTtlInSeconds\": 0, \"authorizerUri\": \"$LAMBDA_AUTH_APPSYNC_ARN\", \"identityValidationExpression\": \"auth\" } } ]"

[github-actions]

This functionality has been released in v3.70.0 of the Terraform AWS Provider. Please see the Terraform documentation on provider versioning or reach out if you need any assistance upgrading.

For further feature requests or bug reports with this functionality, please create a new GitHub issue following the template. Thank you!

[github-actions]

I'm going to lock this issue because it has been closed for 30 days ⏳. This helps our maintainers find and focus on the active issues.
If you have found a problem that seems similar to this, please open a new issue and complete the issue template so we can capture all the details necessary to investigate further.