[Bug 1064527] Re: detect_ipmi needs improvement. detects non-existant device in nested kvm

[Andres Rodriguez]

** Description changed:

  I attempted to enlist and then commission a kvm node.
  kvm does not present ipmi devices.
  
  http://paste.ubuntu.com/1269572/
  
- Then, after that I tried simply 
+ Then, after that I tried simply
  $ time sudo bmc-config --checkout --k
- ey-pair="Lan_Conf:IP_Address"                                                            
+ ey-pair="Lan_Conf:IP_Address"
  Unable to get Number of Users
  
  real    10m0.108s
  user    2m34.858s
  sys     0m48.795s
  
+ so a commissioning attempt of a node without ipmi will be delayed by 10
+ minutes.
  
- so a commissioning attempt of a node without ipmi will be delayed by 10 minutes.
+ 
+ [Impact]
+ This bug causes MAAS to try to detect IPMI on KVM Virtual Machines. This causes a long delay on the enlistment and commissioning process.
+ 
+ [Test Case]
+ 1. Install MAAS
+ 2. Enlist/Commission a machine.
+ (Without the fix, the machine will take 10+ minutes to enlist/commission. With the fix, it will do it within a couple of minutes)
+ 
+ [Regression Potential]
+ Minimal. This change simply checks whether the enlisting/commissioning machine is a virtual machine in KVM. If it is, it avoids the process of trying to detect IPMI.

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https://bugs.launchpad.net/bugs/1064527

Title:
  detect_ipmi needs improvement.  detects non-existant device in nested
  kvm

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