Re-attach your elastic IP at every boot
This script, correctly placed in your startup scripts collection, will help you re-attach your elastic ip at every boot of your AWS instance. The Elastic IP will be placed in the user data section of your instance to make your boot sequence easier.
in your console, start the "launch instance" wizard.
while in the wizard, be sure to add a role to your instance. Beware, the role must have sufficient admin rights to call the ec2 command line tools.
finally, finish your wizard and start your machine. Once started, jump to the next section to install the script and configure it correctly.
Connect to your instance :
$ ssh [email protected]
Clone the repo containing the script. Note: you may need to install git with : sudo yum install git -y
$ git clone https://github.com/pierreg256/eip.git
Add a call to the script in your startup script sequence. For that open the rc.local script
$ cd /etc/rc.d
$ sudo vi rc.local
and add the following line :
su - ec2-user /home/ec2-user/eip/auto-ip.sh
make sure your script is executable
$ cd /home/ec2-user/eip
$ chmod +x auto-ip.sh
Now, get back to your console, stop your instance and open the "View/Change User Data" dialog box.
Add the following in your user data: elastic-ip=<YOUR_EIP>|region=<EC2_REGION> Where :
YOUR_EIP: is the Elastic IP you already allocatedEC2_REGION: is the region where your EC2 instance is running
one example would be:
elastic-ip=12.34.56.78|region=eu-west-1
Now, restart your machine and see the magic happen ;-)
The script logs each execution in a file called /tmp/auto-ip.log Please, check that log file to see if any execution error detail.
Written by Pierre Gilot - Twitter.
The MIT License : http://opensource.org/licenses/MIT
Copyright © 2012 Pierre Gilot
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the 'Software'), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
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