Orchestration
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Uses MongoDB to save the data for running VMS.
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Performs ssh based on public/private key generated at the start of the script. We only have to enter password twice, i.e. once for saving the public key to the machine using ssh-copy-id and again during scp of image file to machine.
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Gets physical machines from src/pm_file.
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Gets Images from src/image_file.
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Gets instance types from src/flavor_file.
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Uses Libvirt to create VM's by first connecting to "qemu:user@ip/system", then defining XML of domain, creating domain.
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Destroys VM using libvirt's, domain.destroy() and then undefines the xml by domain.undefine()