Open Stack

Hi, Everyone, for some reason, I need to make images myself,  I use oz to
create image which is qcow2, but when i upload my image, I can't get
console.log from my instance. But I found that, If i upload a ami image, I
can get log from my instance. I diff the libvirt.xml of two instance, I
found miss cmdline section in the instance i launch by qcow2. When I add it
to libvirt, I can add output to /dev/ttyS0. Is qcow2 images can not out put
the system log while ami does?
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