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Added support for EKS Pod Identity. #721

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Aug 29, 2024
Merged

Added support for EKS Pod Identity. #721

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11 changes: 11 additions & 0 deletions lib/fog/aws/credential_fetcher.rb
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Original file line number Diff line number Diff line change
Expand Up @@ -29,6 +29,17 @@ def fetch_credentials(options)
role_data = connection.get(:path => credential_path, :idempotent => true, :expects => 200).body
session = Fog::JSON.decode(role_data)

if region.nil?
connection = options[:metadata_connection] || Excon.new(INSTANCE_METADATA_HOST)
token_header = fetch_credentials_token_header(connection, options[:disable_imds_v2])
region = connection.get(:path => INSTANCE_METADATA_AZ, :idempotent => true, :expects => 200, :headers => token_header).body[0..-2]
end
elsif ENV["AWS_CONTAINER_CREDENTIALS_FULL_URI"]
connection = options[:connection] || Excon.new(ENV['AWS_CONTAINER_CREDENTIALS_FULL_URI'])
container_authorization_token = File.read(options[:aws_container_authorization_token_file] || ENV['AWS_CONTAINER_AUTHORIZATION_TOKEN_FILE'])
role_data = connection.get(:idempotent => true, :expects => 200, :headers => {'Authorization' => container_authorization_token}).body
session = Fog::JSON.decode(role_data)

if region.nil?
connection = options[:metadata_connection] || Excon.new(INSTANCE_METADATA_HOST)
token_header = fetch_credentials_token_header(connection, options[:disable_imds_v2])
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26 changes: 26 additions & 0 deletions tests/credentials_tests.rb
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Original file line number Diff line number Diff line change
Expand Up @@ -85,6 +85,30 @@

ENV['AWS_CONTAINER_CREDENTIALS_RELATIVE_URI'] = nil

# Make sure fetched credentials are different from those of instance metadata endpoint
container_credentials = {
'AccessKeyId' => 'dummycontainerkey',
'SecretAccessKey' => 'dummycontainersecret',
'Token' => 'dummycontainertoken',
'Expiration' => expires_at.xmlschema
}

ENV['AWS_CONTAINER_CREDENTIALS_FULL_URI'] = 'http://169.254.170.23/v1/credentials'
ENV['AWS_CONTAINER_AUTHORIZATION_TOKEN_FILE'] = File.dirname(__FILE__) + '/lorem.txt'
Excon.stub({ method: :get, scheme: 'http', host: '169.254.170.23', path: '/v1/credentials' },
{ status: 200, body: Fog::JSON.encode(container_credentials) })

tests('#fetch_credentials with EKS Pod Identity') do
returns(aws_access_key_id: 'dummycontainerkey',
aws_secret_access_key: 'dummycontainersecret',
aws_session_token: 'dummycontainertoken',
region: 'us-west-1',
aws_credentials_expire_at: expires_at) { Fog::AWS::Compute.fetch_credentials(use_iam_profile: true) }
end

ENV['AWS_CONTAINER_CREDENTIALS_FULL_URI'] = nil
ENV['AWS_CONTAINER_AUTHORIZATION_TOKEN_FILE'] = nil

ENV['AWS_WEB_IDENTITY_TOKEN_FILE'] = File.dirname(__FILE__) + '/lorem.txt'
ENV['AWS_ROLE_ARN'] = "dummyrole"
ENV['AWS_ROLE_SESSION_NAME'] = "dummyrolesessionname"
Expand Down Expand Up @@ -259,6 +283,8 @@
end
ensure
ENV['AWS_CONTAINER_CREDENTIALS_RELATIVE_URI'] = nil
ENV['AWS_CONTAINER_CREDENTIALS_FULL_URI'] = nil
ENV['AWS_CONTAINER_AUTHORIZATION_TOKEN_FILE'] = nil
ENV['AWS_WEB_IDENTITY_TOKEN_FILE'] = nil
Excon.stubs.clear
Excon.defaults[:mock] = old_mock_value
Expand Down