Inject keys into systemvm.iso using bsdtar (related to #3536)

[cl-k-takahashi]

I fixed an issue of #3536 which was reverted on #3800

At first, systemvm_mnt dir is owned by root, this makes bsdtar unable to work.
By removing systemvm_mnt first, bsdtar can work properly.
systemvm_mnt can be removed by user cloud as /var/[lib/]cloudstack/management is owned by cloud.

Signed-off-by: Kai Takahashi k-takahashi@creationline.com

Description

Types of changes

• Breaking change (fix or feature that would cause existing functionality to change)
• New feature (non-breaking change which adds functionality)
• Bug fix (non-breaking change which fixes an issue)
• Enhancement (improves an existing feature and functionality)
• Cleanup (Code refactoring and cleanup, that may add test cases)

Screenshots (if appropriate):

How Has This Been Tested?

[yadvr]

cc @weizhouapache if we pass the sshpublic key to VMware & XenServer systemvm/VR via the agent do we even need to patch the systemvm.iso like this at all?

[weizhouapache]

cc @weizhouapache if we pass the sshpublic key to VMware & XenServer systemvm/VR via the agent do we even need to patch the systemvm.iso like this at all?

@rhtyd I think we can pass the encoded sshkey in cmdline instead of injecting it to the systemvm.iso. let's discuss later

[yadvr]

Thanks @cl-k-takahashi for the PR, we've moved to a new patching approach that won't use systemvm.iso. Closing this due to the change.