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Use IMDSv2 to get instance metadata -ELB #103

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Use IMDSv2 to get instance metadata -ELB #103

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Commits on Sep 17, 2022

  1. Use IMDSv2 to get instance metadata -ELB 

    Issue #, if available:
This is similar to other PR on elbv2  aws-samples#102 
Current version of script breaks when IMDSv2 is enforced on EC2 instances(
"InstanceMetadataOptions": {
"HttpTokens": "required",
} )

Description of changes:
To improve security, AWS recommend to use IMDSv2, the session-oriented communication to get instance metadata.https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/configuring-instance-metadata-service.html. This change is backward compatible with IMDSv1.
Also updated the request to get the region using placement/region this feature was released by AWS on 2020-08-24 - https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/instancedata-data-categories.html
    @rajeshfintech
    rajeshfintech authored Sep 17, 2022
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