Terraform：如果目标是 aws_sfn_state_machine，aws_api_gateway_integration 的 uri 参数是什么

Question

我要create a step function API using API gateway using Terraforms api_gateway_integration and sfn_state_machine.

我现在必须在 api_gateway_integration 处填写 uri-parameter。

我的步骤函数已创建，我可以参考步骤函数的 ID（类似于 arn:aws:states:*region*:*account*:stateMachine:*step-function-name*:stateMachine:*step-function-entry-point*）。

如果目标是 AWS 步进函数，谁能告诉我 uri 参数的方案或示例？

resource "aws_api_gateway_integration" "endpoint_integration" {
  ...
  integration_http_method = "POST"
  type = "AWS"
  uri = <<<<< What to place here???
}

Answer 1

相对于Terraform-integrate an AWS lambda with an API gateway, you cannot point from an API gateway to a specific AWS state machine "directly" (using the "uri"-parameter"). Instead, the aws_api_gateway_integration-resource points to the AWS state machine in general, the specific AWS state machine will be referenced by AWS ARN as part of the request. You can use an API gateway request template for mapping from the API gateway to the specific state machine, so that you can omit die stateMachineArn when requesting your API. For detailed explanation have a look at AWS documentation "Creating a Step Functions API Using API Gateway"。

工作示例

# var.aws_region = eu-central-1
# var.sfn_orchestrater_arn = arn:aws:states:eu-central-1:*account*:stateMachine:*step-function-entry-point*
resource "aws_api_gateway_integration" "endpoint_integration" {
  http_method             = "POST"
  integration_http_method = "POST"
  type                    = "AWS"
  passthrough_behavior    = "NEVER"
  uri                     = "arn:aws:apigateway:${var.aws_region}:states:action/StartExecution"

  request_templates = {
    "application/json" = <<EOF
{
    "input": "$util.escapeJavaScript($input.json('$'))",
    "stateMachineArn": "${var.sfn_orchestrater_arn}"
}
EOF
  }
}