[Bug 1449369] Re: backport patches of wala 2.0.12 & 2.0.13 for ubuntu 12.04

[Scott Zhang]

** Description changed:

  As we talked, here is the patches we need pick up below change to 12.04,
  and this request goes urgent for us beucase it's impacting customers.
  
  Updates in 2.0.12
  Support page blob for status blob
  https://github.com/Azure/WALinuxAgent/commit/8e506f9696e174fa79b5384af23fed35848d636e
  
  Fix extension status on disable success
  https://github.com/Azure/WALinuxAgent/commit/b655adb4b26ef1723c409fa60ac6696de875853e
  
  Update in 2.0.13(all commits based on 2.0.12 based on below branch)
  
  https://github.com/Azure/WALinuxAgent/tree/backport
  
  [Impact without picking up these fixes]
  Updates in 2.0.12 - Customer could not get extension status when using D-series VM with ubuntu 12.04
  
- Updates in 2.0.13 - VM with ubuntu 12.04 will get http 410 error, and then WALA service gets crashed in a high failure rate from below situation:
+ Updates in 2.0.13 - VM with ubuntu 12.04 will get http 410 error, and then WALA service will get crashed in a high failure rate from below situations:
  -Large size VM
  -All VMS with new Azure CRP

** Description changed:

  As we talked, here is the patches we need pick up below change to 12.04,
  and this request goes urgent for us beucase it's impacting customers.
  
  Updates in 2.0.12
  Support page blob for status blob
  https://github.com/Azure/WALinuxAgent/commit/8e506f9696e174fa79b5384af23fed35848d636e
  
  Fix extension status on disable success
  https://github.com/Azure/WALinuxAgent/commit/b655adb4b26ef1723c409fa60ac6696de875853e
  
  Update in 2.0.13(all commits based on 2.0.12 based on below branch)
  
  https://github.com/Azure/WALinuxAgent/tree/backport
  
  [Impact without picking up these fixes]
  Updates in 2.0.12 - Customer could not get extension status when using D-series VM with ubuntu 12.04
  
- Updates in 2.0.13 - VM with ubuntu 12.04 will get http 410 error, and then WALA service will get crashed in a high failure rate from below situations:
+ Updates in 2.0.13 - VM with ubuntu 12.04 will get http 410 error, and then WALA service will get crashed in a high failure rate from one of below situations:
  -Large size VM
  -All VMS with new Azure CRP

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https://bugs.launchpad.net/bugs/1449369

Title:
  backport patches of wala 2.0.12 & 2.0.13 for ubuntu 12.04

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