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Get EC2 Instance Metadata

aws.ec2metadata is a package for retrieving Amazon EC2 instance metadata from within the running instance. The package simply contains a single R list, metadata, that contains a number of functions for retrieving metadata from within an instance. Most of these functions return character strings, but some will return lists; they default to NULL if no value is returned.

library("aws.ec2metadata")

# get instance id
metadata$instance_id()

# get ami id
metadata$ami_id()

# check for IAM role (NULL if none specified)
(role <- metadata$iam_info())
# get role credentials
if (!is.null(role)) {
    metadata$iam_role("myrole")
}

# get an arbitrary metadata item
metadata$item("meta-data/placement/availability-zone")

Installation

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This package is on CRAN, but to install the latest development version you can install from the cloudyr drat repository:

# latest stable version
install.packages("aws.ec2metadata", repos = c(cloudyr = "http://cloudyr.github.io/drat", getOption("repos")))

Or, to pull a potentially unstable version directly from GitHub:

if (!require("remotes")) {
    install.packages("remotes")
}
remotes::install_github("cloudyr/aws.ec2metadata")

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These binaries (installable software) and packages are in development.
They may not be fully stable and should be used with caution. We make no claims about them.
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