ec2-run-user-data
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上传日期:2018-01-08
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- #!/bin/bash
- #
- # ec2-run-user-data - Run instance user-data if it looks like a script.
- #
- # Only retrieves and runs the user-data script once per instance. If
- # you want the user-data script to run again (e.g., on the next boot)
- # then add this command in the user-data script:
- # rm -f /var/ec2/ec2-run-user-data.*
- #
- # History:
- # 2008-05-16 Eric Hammond <ehammond@thinksome.com>
- # - Initial version including code from Kim Scheibel, Jorge Oliveira
- # 2008-08-06 Tom White
- # - Updated to use mktemp on fedora
- #
- prog=$(basename $0)
- logger="logger -t $prog"
- curl="curl --retry 3 --silent --show-error --fail"
- instance_data_url=http://169.254.169.254/2008-02-01
- # Wait until networking is up on the EC2 instance.
- perl -MIO::Socket::INET -e '
- until(new IO::Socket::INET("169.254.169.254:80")){print"Waiting for network...n";sleep 1}
- ' | $logger
- # Exit if we have already run on this instance (e.g., previous boot).
- ami_id=$($curl $instance_data_url/meta-data/ami-id)
- been_run_file=/var/ec2/$prog.$ami_id
- mkdir -p $(dirname $been_run_file)
- if [ -f $been_run_file ]; then
- $logger < $been_run_file
- exit
- fi
- # Retrieve the instance user-data and run it if it looks like a script
- user_data_file=`mktemp -t ec2-user-data.XXXXXXXXXX`
- chmod 700 $user_data_file
- $logger "Retrieving user-data"
- $curl -o $user_data_file $instance_data_url/user-data 2>&1 | $logger
- if [ ! -s $user_data_file ]; then
- $logger "No user-data available"
- elif head -1 $user_data_file | egrep -v '^#!'; then
- $logger "Skipping user-data as it does not begin with #!"
- else
- $logger "Running user-data"
- echo "user-data has already been run on this instance" > $been_run_file
- $user_data_file 2>&1 | logger -t "user-data"
- $logger "user-data exit code: $?"
- fi
- rm -f $user_data_file