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When run from an EC2 instance this snippet will return the CURRENT ami id for Amazon Linux in the REGION that the instance is running in and load it up into a variable called currentAMI.
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| #!/bin/bash -xe | |
| # grab the Availability Zone from the Meta Data service | |
| az=$(curl http://169.254.169.254/latest/meta-data/placement/availability-zone/) | |
| # drop the trailing zone to get the REGION the instance is running in. | |
| currentRegion=${az%?} | |
| # retirve the source AMI (latest Amazon Linux image in this case) | |
| currentAMI=$(aws ec2 describe-images --owners self amazon --filters "Name=name,Values=amzn-ami-hvm-*gp2" --query 'Images[].[CreationDate,ImageId]' --output text --region $currentRegion | sort -k1 | tail -n1 | awk '{print $2}') |
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