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[AndyAirey <1020695@xxxxxxxxxxxxxxxxxx>]

** Also affects: centos
   Importance: Undecided
       Status: New

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https://bugs.launchpad.net/bugs/1020695

Title:
  Add variable for local IP address to /etc/hosts manager

Status in cloud-init:
  Triaged
Status in CentOS:
  New

Bug description:
  Hi, 
  > 
  > I would like to set first line in the /etc/hosts file to be something like 
  > this: 
  > 
  > local-ip FQDN Hostname 
  > 
  > The ip address should be the one returned from `ec2metadata --local-ipv4`. 
  > After this line, I would like the usual 127.0.0.1 localhost line. I have 
  > edited the template at /etc/cloud/templates/hosts.tmpl to have: 
  > 
  > ## The value '$hostname' will be replaced with the local-hostname 
  > 10.2.46.37 $fqdn $hostname 
  > 127.0.0.1 localhost 

  I guess it would be good to have a variable available for substitution 
  available.  Could you open a bug on cloud-init for that? 
  http://bugs.launchpad.net/cloud-init/+filebug 

  > but I do not know how to get the local IP address as a variable to put into 
  > the template. At the moment, it is hardcoded, which is not ideal. 
  > 
  > Does anyone know what variable I can use in the template file? 

  The hack that I can think of is to add an upstart job or user-data hook 
  that just does this for you. 

  Anyone have better ideas?

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