Support IRSA

[k-kinzal]

Thanks for a very nice plugin!

I've added support for using IRSA in AWS EKS.

• Changed the AWS SDK for Go version to the latest version that is greater than 1.23.13 with IRSA support
• Changed to do the default credential reading of AWS SDK for Go the AccessKeyID ,SecretAccessKey and Credential are not defined.

Tested cases

I have checked the following cases to work with EKS v1.14 and fluent-bit v1.3.11.

Shared Credentials

[OUTPUT]
    Name         s3
    Match         kube.*
    Bucket        mybuckets
    Credential  /path/to/credentials
    S3Prefix     path/to
    Region        ap-northeast-1
    Compress  gzip

Static Credentials

[OUTPUT]
    Name                    s3
    Match                   kube.*
    Bucket                  mybuckets
    AccessKeyID        myaccesskey
    SecretAccessKey mysecretskey
    S3Prefix                path/to
    Region                  ap-northeast-1
    Compress             gzip

Environment Credentials

[OUTPUT]
    Name        s3
    Match       kube.*
    Bucket      mybuckets
    S3Prefix   path/to
    Region      ap-northeast-1
    Compress gzip

env:
  - name: AWS_ACCESS_KEY_ID
     value: myaccesskey
  - name: AWS_SECRET_ACCESS_KEY
     value: mysecretkey

I injected environment variables into the fluent-bit pod in kubernetes.

IRSA

[OUTPUT]
    Name        s3
    Match       kube.*
    Bucket      mybuckets
    S3Prefix   path/to
    Region      ap-northeast-1
    Compress gzip

serviceAccount: my-irsa-sa

I injected IRSA-enabled service account in kubernetes into fluent-bit's pod.

[cosmo0920]

Great job. 💪 Thanks!