XJDKC commented on code in PR #1506:
URL: https://github.com/apache/polaris/pull/1506#discussion_r2074310561
##########
spec/polaris-management-service.yml:
##########
@@ -938,6 +940,40 @@ components:
format: password
description: Bearer token (input-only)
+ SigV4AuthenticationParameters:
+ type: object
+ description: AWS Signature Version 4 authentication
+ allOf:
+ - $ref: '#/components/schemas/AuthenticationParameters'
+ properties:
+ roleArn:
+ type: string
+ description: The aws IAM role arn assumed by polaris userArn when
signing requests
+ example:
"arn:aws:iam::123456789001:role/role-that-has-remote-catalog-access"
+ roleSessionName:
+ type: string
+ description: The role session name to be used by the SigV4 protocol
for signing requests
+ example: "polaris-remote-catalog-access"
+ externalId:
+ type: string
+ description: An optional external id used to establish a trust
relationship with AWS in the trust policy
+ example: "external-id-1234"
+ signingRegion:
+ type: string
+ description: Region to be used by the SigV4 protocol for signing
requests
+ example: "us-west-2"
+ signingName:
+ type: string
+ description: The service name to be used by the SigV4 protocol for
signing requests, the default signing name is "execute-api" is if not provided
+ example: "glue"
+ userArn:
+ type: string
+ description: The aws user arn used to assume the aws role, this
represents the polaris service itself
+ example: "arn:aws:iam::123456789001:user/polaris-service-user"
Review Comment:
> the trust policy does not have to be based on a "user" ARN, it could be
based on a "role" ARN too.
Yes, you are right. But the fact is, we can't create long-lived creds for an
IAM role. This is the model of AWS IAM service.
So if polaris wants to assume a user-privided role from a polaris service
role, before that, polaris needs to get a temp creds for that polaris service
role. But then how do we get those initial creds? By assuming that polaris
service role from another set of long-lived credentials? That gets a bit weird
and kind of defeats the purpose. 🙂
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