Define role for both Http and websocket API in one serverlss.yml

Serverless Framework
,
1

Hi All,
I am using AWS Websocket API with serverless framework 1.38.0 and i want to deploy both http and websocket event lamda with single serverless.yml and with one existing IAM role. Hence for this i have declared role arn in provider tab but when i run sls deploy -v it says error - cannot read properties undefined.
My understanding is we can only define role arn at function level either for event type - http or event type wss or viceversa.
Please help me how to define EXISTING role for both API’s either at global level or function level, sample yml configuration will really help.

My Sample yml below,
hello:
handler: CsharpHandlers::AwsDotnetCsharp.Handler::Hello
role: arn:aws:iam::019095984934:role/LambdaDeployment
name: APITypeHello
events:
- http:
path: api/shipments
method: post
cors: true
chatMessage:
handler: CsharpHandlers::AwsDotnetCsharp.WebsocketHandler::GetWSSRequest
#role: arn:aws:iam::019095984934:role/websocketTesting-dev-ap-southeast-1-lambdaRole - below is the custom admin role
#role: arn:aws:iam::019095984934:role/LambdaDeployment
name: chatMessage
iamRoleStatements:
- Effect: Allow
Action:
- lambda:InvokeFunction,
- lambda:InvokeAsync
Resource: “arn:aws:lambda:::function:*”
Thanks in advance
Arka

2

Hi, I also have the same problem. For now, I am downgrading to 1.36 and using the deprecated serverless-websockets plugin. Could you ping me if you find a solution? Thanks

3

Hi yes i found one solution will share once i done. For now you can assign iamrolestatements policies at provider level and which will joined with the policies of the default IAM role at runtime.
Therefore your default role would be set on all types of API functions and by adding policies to it you are providing more permissions.
Thanks
Ankur

4

Hi,

Also after downgrading the serverless-plugin version is it working fine? like can we provide roles for both types at provider level.

I am also looking for how to use single role for all my deployment and dont want default
to be role created. Can you help please.

Thanks
Ankur

5

Yes. This works. Adding a policy to the default role created works.

6

I think that the default role is in the code and I have checked so far(I would like to be wrong) and have not seen anyway that the core code can retrieve a custom/user defined role. Also I have not tried to downgrade yet. But I will try the option of downgrading and using the deprecated serverless-websockets plugin before the end of the day. Also thanks for your help.

7

Welcome. I have just tried the websocket deployment and it seems we can only define role for websocket functions like either in default handlers (onconnect, disconnect) or in sendmessage handler like below. In this case the connect disconnect routes will be deploy with default IAM role but it should be fine.

functions:
hello:
handler: CsharpHandlers::AwsDotnetCsharp.Handler::Hello
#name: APITypeHello-{self:provider.stage} name: APITypeHello role: arn:aws:iam::...:role/lambdarolenew events: - http: path: api/shipments method: post integration: lambda cors: true onConnect: handler: CsharpHandlers::AwsDotnetCsharp.WSSConnectHandler::WSSConnect #name: onConnect-{self:provider.stage}
name: OnConnect
events:
- websocket:
route: $connect
- websocket:
route: disconnect chatMessage: handler: CsharpHandlers::AwsDotnetCsharp.WebsocketHandler::GetWSSRequest #name: chatMessage-{self:provider.stage}
name: chatMessage
role: arn:aws:iam::…:role/lambdarolenew
events:
- websocket:
route: chatMessage