Openstack - Error While resizing the instance

Error While resizing the instance

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2014-08-12 09:38:08.449 13602 WARNING nova.scheduler.utils [req-7cf9b53a-24ed-46e7-adce-6c5e83c2839b 2ca1137e67d741e0839e67e
4959a8eea 8c9fb6577a1e45879f35e3e43b34de58] Failed to compute_task_migrate_server: No valid host was found.
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Solution

make sure following settings are enables in all the nova.conf

"allow_resize_to_same_host=true"
"allow_migrate_to_same_host=true"

After enabling it reboot all the openstack services and try the resizing from dashboard

We will be asked for an conformation for resizing, if we don't select any option resizing will fail

By command promt
[root@controller1 ~]# nova list
+--------------------------------------+------------------+--------+------------+-------------+-------------------+
| ID | Name | Status | Task State | Power State | Networks |
+--------------------------------------+------------------+--------+------------+-------------+-------------------+
| 0c86c7bd-e815-4616-9c01-30cb8eb09414 | Test Instance 00 | ACTIVE | - | Running | demo-net=10.0.0.9 |
+--------------------------------------+------------------+--------+------------+-------------+-------------------+

List the available flavors with the following command:

$ nova flavor-list
+----+-----------+-----------+------+-----------+------+-------+-------------+-----------+
| ID | Name | Memory_MB | Disk | Ephemeral | Swap | VCPUs | RXTX_Factor | Is_Public |
+----+-----------+-----------+------+-----------+------+-------+-------------+-----------+
| 1 | m1.tiny | 512 | 0 | 0 | | 1 | 1.0 | True |
| 2 | m1.small | 2048 | 20 | 0 | | 1 | 1.0 | True |
| 3 | m1.medium | 4096 | 40 | 0 | | 2 | 1.0 | True |
| 4 | m1.large | 8192 | 80 | 0 | | 4 | 1.0 | True |
| 5 | m1.xlarge | 16384 | 160 | 0 | | 8 | 1.0 | True |
+----+-----------+-----------+------+-----------+------+-------+-------------+-----------+
To resize the server, pass the server ID or name and the new flavor to the nova resize command. Include the --poll parameter to report the resize progress.

$ nova resize myCirrosServer 4 --poll
Instance resizing... 100% complete
Finished
Show the status for your server:

$ nova list

[root@controller1 ~]# nova list
+--------------------------------------+------------------+--------+------------------+-------------+-------------------+
| ID | Name | Status | Task State | Power State | Networks |
+--------------------------------------+------------------+--------+------------------+-------------+-------------------+
| 0c86c7bd-e815-4616-9c01-30cb8eb09414 | Test Instance 00 | RESIZE | resize_migrating | Running | demo-net=10.0.0.9 |
+--------------------------------------+------------------+--------+------------------+-------------+-------------------+

When the resize completes, the status becomes VERIFY_RESIZE.

Confirm the resize:

$ nova resize-confirm 0c86c7bd-e815-4616-9c01-30cb8eb094145
The server status becomes ACTIVE.

If the resize fails or does not work as expected, you can revert the resize:

$ nova resize-revert 0c86c7bd-e815-4616-9c01-30cb8eb09414
The server status becomes ACTIVE.