We can reproduce this problem with the following:
$ nova boot --image cirros-0.3.1-x86_64-uec --flavor m1.nano vm01 $ nova backup vm01 vm01-backup daily 2 $ nova console-log vm01
The result of "nova console-log" would be empty. In addition, we can reproduce this with creating an instance snapshot instead of "nova backup":
$ nova boot --image cirros-0.3.1-x86_64-uec --flavor m1.nano vm01 $ nova image-create vm01 vm01-snapshot $ nova console-log vm01
We can reproduce this problem with the following:
$ nova boot --image cirros- 0.3.1-x86_ 64-uec --flavor m1.nano vm01
$ nova backup vm01 vm01-backup daily 2
$ nova console-log vm01
The result of "nova console-log" would be empty.
In addition, we can reproduce this with creating an instance snapshot instead of "nova backup":
$ nova boot --image cirros- 0.3.1-x86_ 64-uec --flavor m1.nano vm01
$ nova image-create vm01 vm01-snapshot
$ nova console-log vm01