cloudyr / aws.ec2metadata
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#'
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#' The remaining functions in the list are aliases for potentially commonly needed metadata items.
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#' 
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#' The enviromental variable \code{AWS_METADATA_SERVICE_TIMEOUT} controls the timeout for instance metadata checks, and defaults to 1 second.
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#' 
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#' @return \code{is_ec2()} and \code{is_ecs()} return a logical. Generally, all other functions will return a character string containing the requested information, otherwise a \code{NULL} if the response is empty. The \code{iam_role()} and \code{ecs_metadata()} functions return a list. An error will occur if, for some reason, the request otherwise fails.
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#' @examples
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#' names(metadata)
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