scripts: add more options in qemu script

[cristiklein]

scripts: add more options in qemu script

I frequently need to change the number of processors, memory and VM name. This change allows the user to specify these options when booting CoreOS from the qemu script.

[euank]

Trailing arguments are supported and added to the qemu invocation.

Using something like:

$ ./coreos_production_qemu.sh -name asdf -smp cpus=10

will change the name, number of processors, etc.

I'm not sure we need this mechanism as well since it doesn't hide a significant amount of abstraction (as opposed to the -i flag, which does).

[cristiklein]

I see your point. There is, however, a minor downside to the solution you proposed, in that the command-line of qemu (e.g., ps -AF) looks confusing.

Would you be more open to an -image option to allow pointing to a COW-image of CoreOS instead of the one shipped by default?