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Copy pathec2-metadata
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executable file
·270 lines (246 loc) · 9.66 KB
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#!/usr/bin/bash
# Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
#
# Licensed under the MIT License. See the LICENSE accompanying this file
# for the specific language governing permissions and limitations under
# the License.
function print_help()
{
echo "ec2-metadata v0.1.5
Use to retrieve EC2 instance metadata from within a running EC2 instance.
e.g. to retrieve instance id: ec2-metadata -i
to retrieve ami id: ec2-metadata -a
to get help: ec2-metadata --help
For more information on Amazon EC2 instance meta-data, refer to the documentation at
https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ec2-instance-metadata.html
Usage: ec2-metadata <option>
Options:
--all Show all metadata information for this host (also default).
-a/--ami-id The AMI ID used to launch this instance
-l/--ami-launch-index The index of this instance in the reservation (per AMI).
-m/--ami-manifest-path The manifest path of the AMI with which the instance was launched.
-n/--ancestor-ami-ids The AMI IDs of any instances that were rebundled to create this AMI.
-b/--block-device-mapping Defines native device names to use when exposing virtual devices.
-i/--instance-id The ID of this instance
-t/--instance-type The type of instance to launch. For more information, see Instance Types.
-h/--local-hostname The local hostname of the instance.
-o/--local-ipv4 Public IP address if launched with direct addressing; private IP address if launched with public addressing.
-k/--kernel-id The ID of the kernel launched with this instance, if applicable.
-z/--availability-zone The availability zone in which the instance launched. Same as placement
-R/--region The region in which the instance launched.
-P/--partition The AWS partition name.
-c/--product-codes Product codes associated with this instance.
-p/--public-hostname The public hostname of the instance.
-v/--public-ipv4 NATted public IP Address
-u/--public-keys Public keys. Only available if supplied at instance launch time
-r/--ramdisk-id The ID of the RAM disk launched with this instance, if applicable.
-e/--reservation-id ID of the reservation.
-s/--security-groups Names of the security groups the instance is launched in. Only available if supplied at instance launch time
-d/--user-data User-supplied data.Only available if supplied at instance launch time.
-g/--tags Tags assigned to this instance.
--quiet Suppress tag keys from the output.
--path Show metadata information from the specified path. Can be specified multiple times."
}
METADATA_BASEURL="http://169.254.169.254"
METADATA_TOKEN_PATH="latest/api/token"
METADATA_VERSION="latest"
QUIET=""
function set_imds_token()
{
if [ -z "${IMDS_TOKEN}" ];then
IMDS_TOKEN=$(curl -s -f -X PUT -H "X-aws-ec2-metadata-token-ttl-seconds: 900" "${METADATA_BASEURL}/${METADATA_TOKEN_PATH}")
if [ "${?}" -gt 0 ] || [ -z "${IMDS_TOKEN}" ]; then
echo '[ERROR] Could not get IMDSv2 token. Instance Metadata might have been disabled or this is not an EC2 instance.' >&2
exit 1
fi
fi
}
# param1 = query
function get_meta()
{
local imds_out
imds_out=$(curl -s -q -H "X-aws-ec2-metadata-token:${IMDS_TOKEN}" -f "${METADATA_BASEURL}/${METADATA_VERSION}/${1}")
echo -n "${imds_out}"
}
#print standard metric
function print_normal_metric() {
metric_path=$2
[ -z "$QUIET" ] && echo -n "$1: "
RESPONSE=$(get_meta "${metric_path}")
if [ -n "${RESPONSE}" ]; then
echo "$RESPONSE"
else
echo not available
fi
}
#print block-device-mapping
function print_block_device_mapping()
{
[ -z "$QUIET" ] && echo 'block-device-mapping: '
x=$(get_meta meta-data/block-device-mapping/)
if [ -n "${x}" ]; then
for i in $x; do
[ -z "$QUIET" ] && echo -ne '\t' "$i: "
echo "$(get_meta "meta-data/block-device-mapping/$i")"
done
else
echo not available
fi
}
#print public-keys
function print_public_keys()
{
[ -z "$QUIET" ] && echo 'public-keys: '
x=$(get_meta meta-data/public-keys/)
if [ -n "${x}" ]; then
for i in $x; do
index=$(echo "$i" | cut -d = -f 1)
keyname=$(echo "$i" | cut -d = -f 2)
[ -z "$QUIET" ] && echo "keyname:$keyname"
[ -z "$QUIET" ] && echo "index:$index"
format=$(get_meta "meta-data/public-keys/$index/")
[ -z "$QUIET" ] && echo "format:$format"
[ -z "$QUIET" ] && echo 'key:(begins from next line)'
echo "$(get_meta "meta-data/public-keys/$index/$format")"
done
else
echo not available
fi
}
#print tags
function print_tags()
{
[ -z "$QUIET" ] && echo 'tags: '
x=$(get_meta meta-data/tags/instance/)
if [ -n "${x}" ]; then
for i in $x; do
echo -n -e '\t' "$i: "
echo "$(get_meta "meta-data/tags/instance/$i")"
done
else
echo not available
fi
}
function print_all()
{
print_normal_metric ami-id meta-data/ami-id
print_normal_metric ami-launch-index meta-data/ami-launch-index
print_normal_metric ami-manifest-path meta-data/ami-manifest-path
print_normal_metric ancestor-ami-ids meta-data/ancestor-ami-ids
print_block_device_mapping
print_normal_metric instance-id meta-data/instance-id
print_normal_metric instance-type meta-data/instance-type
print_normal_metric local-hostname meta-data/local-hostname
print_normal_metric local-ipv4 meta-data/local-ipv4
print_normal_metric kernel-id meta-data/kernel-id
print_normal_metric placement meta-data/placement/availability-zone
print_normal_metric region meta-data/placement/region
print_normal_metric partition meta-data/services/partition
print_normal_metric product-codes meta-data/product-codes
print_normal_metric public-hostname meta-data/public-hostname
print_normal_metric public-ipv4 meta-data/public-ipv4
print_public_keys
print_normal_metric ramdisk-id /meta-data/ramdisk-id
print_normal_metric reservation-id /meta-data/reservation-id
print_normal_metric security-groups meta-data/security-groups
print_normal_metric user-data user-data
print_tags
}
function print_path()
{
local path
path=$(echo "$1" | sed 's/\/\+/\//g')
if [[ ! "$path" =~ (^/$|^/?(1\.0|[0-9]{4}-[0-9]{2}-[0-9]{2}|latest)) ]]; then
if [[ "$path" =~ ^/?(dynamic|meta-data) ]]; then
path="latest/$path"
else
path="latest/meta-data/$path"
fi
fi
path=$(echo "$path" | sed 's/\/\+/\//g')
METADATA_VERSION=""
print_normal_metric "$path" "$path"
METADATA_VERSION="latest"
}
#check if run inside an EC2 instance
set_imds_token
#command called in default mode
if [ "$#" -eq 0 ]; then
print_all
fi
declare -a actions
declare -a paths
shortopts=almnbithokzPcpvuresdgR
longopts=(ami-id ami-launch-index ami-manifest-path ancestor-ami-ids block-device-mapping
instance-id instance-type local-hostname local-ipv4 kernel-id availability-zone
partition product-codes public-hostname public-ipv4 public-keys ramdisk-id
reservation-id security-groups user-data tags region help all quiet path:)
oldIFS="$IFS"
IFS=,
TEMP=$(getopt -o $shortopts --longoptions "${longopts[*]}" -n 'ec2-metadata' -- "$@")
if [ $? -ne 0 ]; then
echo 'Terminating...' >&2
exit 1
fi
IFS="$oldIFS"
eval set -- "$TEMP"
unset TEMP
while true; do
case "$1" in
--help)
print_help ; shift
exit 0
;;
--quiet)
QUIET=1 ; shift
;;
--path)
actions+=("$1")
paths+=("$2")
shift 2
;;
--)
shift ; break
;;
--?*|-?)
# pass most arguments to the original action processing
# code after setting options
actions+=("$1"); shift
;;
*)
echo 'Unknown error: ' "[$1]" >&2
exit 1
;;
esac
done
#start processing command line arguments
for action in "${actions[@]}"; do
case "$action" in
-a | --ami-id ) print_normal_metric ami-id meta-data/ami-id ;;
-l | --ami-launch-index ) print_normal_metric ami-launch-index meta-data/ami-launch-index ;;
-m | --ami-manifest-path ) print_normal_metric ami-manifest-path meta-data/ami-manifest-path ;;
-n | --ancestor-ami-ids ) print_normal_metric ancestor-ami-ids meta-data/ancestor-ami-ids ;;
-b | --block-device-mapping ) print_block_device_mapping ;;
-i | --instance-id ) print_normal_metric instance-id meta-data/instance-id ;;
-t | --instance-type ) print_normal_metric instance-type meta-data/instance-type ;;
-h | --local-hostname ) print_normal_metric local-hostname meta-data/local-hostname ;;
-o | --local-ipv4 ) print_normal_metric local-ipv4 meta-data/local-ipv4 ;;
-k | --kernel-id ) print_normal_metric kernel-id meta-data/kernel-id ;;
-z | --availability-zone ) print_normal_metric placement meta-data/placement/availability-zone ;;
-R | --region ) print_normal_metric region meta-data/placement/region ;;
-P | --partition ) print_normal_metric partition meta-data/services/partition ;;
-c | --product-codes ) print_normal_metric product-codes meta-data/product-codes ;;
-p | --public-hostname ) print_normal_metric public-hostname meta-data/public-hostname ;;
-v | --public-ipv4 ) print_normal_metric public-ipv4 meta-data/public-ipv4 ;;
-u | --public-keys ) print_public_keys ;;
-r | --ramdisk-id ) print_normal_metric ramdisk-id /meta-data/ramdisk-id ;;
-e | --reservation-id ) print_normal_metric reservation-id /meta-data/reservation-id ;;
-s | --security-groups ) print_normal_metric security-groups meta-data/security-groups ;;
-d | --user-data ) print_normal_metric user-data user-data ;;
-g | --tags ) print_tags ;;
--path ) print_path "${paths[0]}"; paths=("${paths[@]:1}") ;;
--all ) print_all; exit ;;
esac
shift
done
exit 0