Serverless: duplicate `AWS::ApiGateway::ApiKey`

[hideokamoto]

This is a (Bug Report / Feature Proposal)

Bug Report

Description

If using AWS::ApiGateway::ApiKey Resource in serverless.yml,
I cannot deploy multipile stage.

Example YAML

service: example-api
provider:
  name: aws
  runtime: nodejs4.3
  stage: prod
  region: us-east-1
  apiKeys:
    - exampleKey

functions:
  exampleKey:
    handler: index.handler
    description: Example api
    events:
      - http:
          path: example/{post_id}
          method: get
          private: true

Command

1st deploy is success.

$ sls deploy -s prod
Serverless: Packaging service...
Serverless: Uploading CloudFormation file to S3...
Serverless: Uploading service .zip file to S3...
Serverless: Updating Stack...
Serverless: Checking Stack update progress...
.................................
Serverless: Stack update finished...

Service Information
service: example-api
stage: prod
region: us-east-1

api keys:
 exampleKey: o5jil98nb4
endpoints:
 GET - https://xxxxxxxx.execute-api.us-east-1.amazonaws.com/prod/example/{post_id}
functions:
 example-api-prod-exampleKey: arn:aws:lambda:us-east-1:610511741716:function:example-api-prod-cloudfron
tTransaction

But if I try to deploy another stages, deployment is failed.

$ sls deploy -s dev
Serverless: Packaging service...
Serverless: Uploading CloudFormation file to S3...
Serverless: Uploading service .zip file to S3...
Serverless: Updating Stack...
Serverless: Checking Stack update progress...
....................................................Serverless: Deployment failed!

  Serverless Error ---------------------------------------

     An error occurred while provisioning your stack: ApiGatewayApiKey1
     - exampleKey already exists in stack arn:aws:cloudformation:us-east-1:9999999999:stack/example-api-dev/3d0254
a0-890a-11e6-9009-50d5ca632682.


  Get Support --------------------------------------------
     Docs:          docs.serverless.com
     Bugs:          github.com/serverless/serverless/issues

Additional Data

• _Serverless Framework Version you're using_:

% node -v 
v6.7.0
% sls -v
1.0.0-rc.2

• _Operating System_:
  Mac
  Terminal

I think AWS::ApiGateway::ApiKey need some prefix like prod-exampleKey and dev-exampleKey.
And can I try to add those code in following space ?
https://github.com/serverless/serverless/blob/e1adf6e921aba5588ba85f3d5cd0ba4158cd4a35/lib/plugins/aws/deploy/compile/events/apiGateway/lib/apiKeys.js#L25

thanks !

[satoshun00]

Why not use ${opt:stage} variable?
https://github.com/serverless/serverless/blob/master/docs/01-guide/08-serverless-variables.md#referencing-cli-options

apiKeys:
  - ${opt:stage}-example-key