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Use IMDSv2 to get instance metadata #102

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Use IMDSv2 to get instance metadata #102

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8 changes: 4 additions & 4 deletions load-balancing/elb-v2/common_functions.sh
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Original file line number Diff line number Diff line change
Expand Up @@ -107,9 +107,8 @@ exec_with_fulljitter_retry() {
# Writes to STDOUT the AWS region as known by the local instance.
get_instance_region() {
if [ -z "$AWS_REGION" ]; then
AWS_REGION=$(curl -s http://169.254.169.254/latest/dynamic/instance-identity/document \
| grep -i region \
| awk -F\" '{print $4}')
TOKEN=$(curl -X PUT "http://169.254.169.254/latest/api/token" -H "X-aws-ec2-metadata-token-ttl-seconds: 21600")
AWS_REGION=$(curl -H "X-aws-ec2-metadata-token: $TOKEN" -s http://169.254.169.254/latest/meta-data/placement/region)
fi

echo $AWS_REGION
Expand Down Expand Up @@ -728,6 +727,7 @@ error_exit() {
# Writes to STDOUT the EC2 instance ID for the local instance. Returns non-zero if the local
# instance metadata URL is inaccessible.
get_instance_id() {
curl -s http://169.254.169.254/latest/meta-data/instance-id
TOKEN=$(curl -X PUT "http://169.254.169.254/latest/api/token" -H "X-aws-ec2-metadata-token-ttl-seconds: 21600")
curl -H "X-aws-ec2-metadata-token: $TOKEN" -s http://169.254.169.254/latest/meta-data/instance-id
return $?
}