[Bug 1375252] Re: Hostname change is not preserved across reboot on Azure Ubuntu VMs

[Ben Howard]

** Description changed:

+ SRU Justification
+ 
+ [IMPACT] Cloud-init overrides the hostname each boot with the fabric
+ provided name. Users expect that the hostname will not be reset each
+ boot.
+ 
+ [Test Case 1] Upgrade from proposed
+ 1. Install cloud-init from proposed
+ 2. Change the hostname via /etc/hostname
+ 3. Reboot
+ 4. Confirm that the new hostname is used
+ 
+ [Test Case 2] Reprovision
+ (Follow Test Case 1)
+ 1. Capture Azure VM
+ 2. Start captured VM
+ 3. Confirm that the new fabric name is used
+ 
+ [Test Case 3] New Image Launch
+ 1. Build an Azure image from -proposed
+ 2. Boot and confirm that hostname is set properly
+ 3. Follow test case 1
+ 4. Follow test case 2
+ 
+ [Regression Potential] As this is a backport of the 15.10 Datasource,
+ there is a medium regression potential. The 15.10 Datasource fixes a
+ number of Azure provisioning bugs and is thus desirable.
+ 
+ [ORIGINAL REPORT]
+ 
  Whilst a hostname change is immediately effective using the hostname or
  hostnamectl commands, and changing the hostname this way is propagated
  to the hostname field in the Azure dashboard, upon rebooting the Ubuntu
  VM the hostname reverts to the Virtual Machine name as displayed in the
  Azure dashboard.
  
  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: walinuxagent 2.0.8-0ubuntu1~14.04.0
  ProcVersionSignature: Ubuntu 3.13.0-36.63-generic 3.13.11.6
  Uname: Linux 3.13.0-36-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3.4
  Architecture: amd64
  Date: Mon Sep 29 12:48:56 2014
  ProcEnviron:
   TERM=xterm
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_GB.UTF-8
   SHELL=/bin/bash
  SourcePackage: walinuxagent
  UpgradeStatus: No upgrade log present (probably fresh install)
  mtime.conffile..etc.waagent.conf: 2014-09-29T09:37:10.758660

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https://bugs.launchpad.net/bugs/1375252

Title:
  Hostname change is not preserved across reboot on Azure Ubuntu VMs

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