[Enhancement] Even when IRSA is used, pod still try IMDS when vpcId is not specified

[phuhung273]

Is your feature request related to a problem?
Even when IRSA is used, default values for aws-region and aws-vpc-id are still autofilled using IMDS. Which is not achievable in secure environment, IMDS is encouraged to be disabled for pods.

By submitting this issue, Im fully aware that we can manually specify aws-region and aws-vpc-id so pods wont use IMDS.

Describe the solution you'd like
Default value: IRSA or IMDS

Idea:

cfs := config.LoadDefaultConfig()
region := cfg.Region
vpcID := eks.DescribeCluster().vpcID

Describe alternatives you've considered
N/A

• I may able to contribute

[shraddhabang]

What should be default values in your opinion?

[phuhung273]

@shraddhabang i just modified Issue to include the expected Default and idea for implementation.