Add AWS MSK IAM + TLS authentication support #850
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In order to implement the IAM auth mechanism for Burrow, the following changes were required. * The iamTokenProvider struct has been implemented to hold the iam parameters provided in the toml configuration file. * A helper function which leverages the aws-msk-iam-sasl-signer-go/signer methods in order to generate the auth token has been provided. * The token is being assigned to the saramaConfig.Net.SASL structure. Document TLS+IAM configuration * tls-iam.md contains a description of the IAM implementation and configuration. * Added a commented section to config/burrow.toml which provides a IAM configuration example.
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This patch lets Burrow talk to Amazon MSK clusters that enforce IAM
(SASL/OAUTHBEARER) over TLS, without sidecars or external proxies.
Highlights
New config sections
[iam.*]— region, optional role-arn / profileiam = "<name>"key in[client-profile.*]to activate IAM authHelpers
iam.go– wrapsaws-msk-iam-sasl-signer-go v1.0.4and implementssarama.AccessTokenProvidersarama.go– extendsGetSaramaConfigFromClientProfileto:• validate
iam.*block• auto-enable
SASLTypeOAuth• inject the token provider
• enforce TLS when IAM is present
New dependency
github.com/aws/aws-msk-iam-sasl-signer-go→ v1.0.4Unit tests
iam.go; signer calls are stubbed.Docs
docs/msk-iam.md– overview, IAM policy snippets, EKS Pod-Identity notesexamples/burrow.toml– ready-to-run config with TLS + IAM listener (9098)Compatibility
iam.*is used without TLS or region.