Comment 0 for bug 1060925

Nova rebuild command works like this:

nova rebuild
 usage: nova rebuild [--password <password>] <server> <image>

Currently the image (rootfs) is replaced but not the kernel (and ramdisk if applicable).
The objective is to make libvirt use the correct kernel and ramdisk associated with the image in glance.

Steps to reproduce:
1. Rebuild a good instance to a new image.
 2. Check that the console output has received the keys (like a normal nova boot).
 3. Use the credentials of the original instance such as the ssh keys and the floating ip and try to ssh into the instance.
 4. Check that the rootfs is correctly rebuilt (cat /etc/issue).
5. Check that the kernel is as expected (uname -r).

I reproduced this issue in devstack installed folsom. Created a Vm with Cirros image and after that tried to rebuild the instance using ami-tty image.
Then the output is as follows:
After first boot with Cirros image:
$ cat /etc/issue
login as 'cirros' user. default password: 'cubswin:)'. use 'sudo' for root.
$uname -r
3.0.0-12-virtual

After rebuilt with ami-tty image:
# bash
bash-4.1# uname -r
3.0.0-12-virtual
bash-4.1# cat /etc/issue

ttylinux ver 12.1 [atheling]
x86_64 class \s kernel \r (\l)
The initial "root" and "user" password is "password".

The database entries are as follows:
image_ref is pointing to new image ID and kernel and ramdisk are pointing to old ones as follows:
mysql> select id, image_ref, kernel_id, ramdisk_id, server_name, vm_state from instances;
+----+--------------------------------------+--------------------------------------+--------------------------------------+-------------+----------+
| id | image_ref | kernel_id | ramdisk_id | server_name | vm_state |
+----+--------------------------------------+--------------------------------------+--------------------------------------+-------------+----------+
| 1 | c4dd8ed5-9488-44f8-98c3-34bcf6cdd52d | b438e614-630e-4bf7-b907-4e4165b32408 | 04a1326f-0891-4b10-8861-61df279d9b40 | NULL | active |
+----+--------------------------------------+--------------------------------------+--------------------------------------+-------------+----------+
1 row in set (0.00 sec)

mysql> Bye
root@ubuntu28folsom:~# nova image-list
+--------------------------------------+---------------------------------+--------+--------+
| ID | Name | Status | Server |
+--------------------------------------+---------------------------------+--------+--------+
| 583282f0-3f79-49ff-9886-97c2a1a3cd3c | cirros-0.3.0-x86_64-uec | ACTIVE | |
| b438e614-630e-4bf7-b907-4e4165b32408 | cirros-0.3.0-x86_64-uec-kernel | ACTIVE | |
| 04a1326f-0891-4b10-8861-61df279d9b40 | cirros-0.3.0-x86_64-uec-ramdisk | ACTIVE | |
| c4dd8ed5-9488-44f8-98c3-34bcf6cdd52d | disk123 | ACTIVE | |
| 5fab96d5-cc2d-4d81-86cc-825885380c12 | kernel | ACTIVE | |
| 5962333b-376e-4d6f-8938-39fff085f7eb | ram | ACTIVE | |
+--------------------------------------+---------------------------------+--------+--------+
root@ubuntu28folsom:~# nova list
+--------------------------------------+--------+--------+------------------+
| ID | Name | Status | Networks |
+--------------------------------------+--------+--------+------------------+
| 80f72970-7131-4426-9a44-7075b290af3e | imgsrv | ACTIVE | private=10.0.0.2 |
+--------------------------------------+--------+--------+------------------+
root@ubuntu28folsom:~# nova show 80f72970-7131-4426-9a44-7075b290af3e
+------------------------+----------------------------------------------------------+
| Property | Value |
+------------------------+----------------------------------------------------------+
| OS-DCF:diskConfig | MANUAL |
| OS-EXT-STS:power_state | 1 |
| OS-EXT-STS:task_state | None |
| OS-EXT-STS:vm_state | active |
| accessIPv4 | |
| accessIPv6 | |
| config_drive | |
| created | 2012-10-03T17:32:06Z |
| flavor | m1.tiny (1) |
| hostId | ebf6015593d45f07c808e7868e03b8a14359f41196b8105f66dbd443 |
| id | 80f72970-7131-4426-9a44-7075b290af3e |
| image | disk123 (c4dd8ed5-9488-44f8-98c3-34bcf6cdd52d) |
| key_name | siri |
| metadata | {} |
| name | imgsrv |
| private network | 10.0.0.2 |
| progress | 0 |
| security_groups | [{u'name': u'default'}] |
| status | ACTIVE |
| tenant_id | 81a600396e5c4d07b07772363d1ddf95 |
| updated | 2012-10-03T17:38:36Z |
| user_id | d4418ce0c6524435ba4901fefe394193 |
+------------------------+----------------------------------------------------------+
root@ubuntu28folsom:~#