Learn how to resize your Public Cloud instance using the OpenStack CLI.
As a result of increased activity, or simply to address new needs, your instance may not be able to meet this new burden due to a lack of resources. However, with OVHcloud Public Cloud, you can increase the resources available to your instance with just a few steps.
Requirements
- A Public Cloud instance in your OVHcloud account
- An OpenStack user account
- An OpenStack CLI ready environment
- Set OpenStack environment variables
Instructions
Performing a backup
When performing a resize, the instance is shut down for the time of the operation. We therefore recommend that you back up your instance and stop all running processes before proceeding. For more information on how to back up your instance, read the following guide.
Listing servers
The first step is to list your servers in order to retrieve the name of the instance you wish to resize. In our example, we want to resize the instance named "OVHcloudinstance".
$ openstack server list +--------------------------------------+----------------------------------------------------------------+--------+---------------------------------------------+ | ID | Name | Image | Flavor | | Status | Networks | +--------------------------------------+----------------------------------------------------------------+--------+---------------------------------------------+ | 19298898-934b-xxxx-xxxx-xxxxxxxxxxxx | testinstance1 | Centos 7 | d2-2 | | ACTIVE | Ext-Net=111.112.113.9, 2607:5300:xxx:xxxx::ae9 | 23ce0491-5e29-xxxx-xxxx-xxxxxxxxxxxx | testinstance2 | Ubuntu 23.04 | d2-2 | | ACTIVE | Ext-Net=111.112.113.61, 2607:5300:xxx:xxxx::c0a | 8f9a08a6-f0fe-xxxx-xxxx-xxxxxxxxxxxx | OVHcloudinstance | Debian 12 | b2-7 | | ACTIVE | Ext-Net=111.112.113.200, 2607:5300:xxx:xxxx::9a3 +--------------------------------------+----------------------------------------------------------------+--------+---------------------------------------------+
Listing flavors
Next, you need to display the list of flavors available in your region in order to retrieve the ID of the new flavor. In our example, we want to resize our instance to a b2-30 model with ID "098889e6-d1fc-4967-baea-19fd97fd83a8".
$ openstack flavor list +--------------------------------------+---------------------+--------+------+-----------+-------+-----------+ | ID | Name | RAM | Disk | Ephemeral | VCPUs | Is Public | +--------------------------------------+---------------------+--------+------+-----------+-------+-----------+ | 009ee05f-9430-4c85-b9f7-66297db22731 | win-hg-7-ssd-flex | 7000 | 50 | 0 | 2 | True | | 01ef1e13-5a85-4c4b-84f4-9e9da85da51d | r2-15 | 15000 | 50 | 0 | 2 | True | | 01f4f140-3d51-4d94-ad26-9aa85941dc63 | win-hg-60-ssd-flex | 60000 | 50 | 0 | 16 | True | | 041d0272-4db5-4c13-9861-a4e17c48fd9c | r2-60 | 60000 | 100 | 0 | 4 | True | | 0531d26b-e117-4cdb-9e83-c16727f4737e | c2-60 | 60000 | 400 | 0 | 16 | True | | 05ebb9db-d6c8-4b7a-bf38-eea519aa5262 | win-r2-120-flex | 120000 | 50 | 0 | 8 | True | | 098889e6-d1fc-4967-baea-19fd97fd83a8 | b2-30 | 30000 | 200 | 0 | 8 | True | | 0ec183bd-d014-48ad-a71e-1233c5f5c79b | win-r2-30 | 30000 | 50 | 0 | 2 | True | | 1070c9d6-5bc7-45db-bab2-073bff119f22 | r2-30 | 30000 | 50 | 0 | 2 | True | | 108e2180-e257-4054-aa23-18b123d06ed8 | win-hg-120-ssd-flex | 120000 | 50 | 0 | 32 | True | | 11a77f5f-5cbe-4394-ba85-d4afb2b0bade | eg-30-flex | 30000 | 50 | 0 | 8 | True | | 125a6e9e-7522-463a-a90d-121abaabf21a | win-b2-30-flex | 30000 | 50 | 0 | 8 | True | | 1335874a-7ddd-453b-b655-d9bf044ef5f9 | eg-120-ssd | 120000 | 800 | 0 | 32 | True | | fd80c213-d30f-4e0c-ae9d-ecdcb422fc1b | eg-7-ssd | 7000 | 100 | 0 | 2 | True | +--------------------------------------+---------------------+--------+------+-----------+-------+-----------+
Resizing an instance
Once you have retrieved the necessary information, you can now resize your instance:
$ openstack server resize --flavor <FLAVOR-ID> <INSTANCE-NAME>
To resize our "OVHcloudinstance":
$ openstack server resize --flavor 098889e6-d1fc-4967-baea-19fd97fd83a8 OVHcloudinstance
You can follow the process by running the following command frequently. The status should appear as RESIZE.
$ openstack server show OVHcloudinstance +-------------------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+ | Field | Value | +-------------------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+ | id | 8f9a08a6-f0fe-xxxx-xxxx-xxxxxxxxxxxx | | image | Debian 12 (31e40bc4-5b35-4c5f-96ff-37df3660dec0) | | key_name | OVHcloud | | name | OVHcloudinstance | | status | RESIZE | | tags | | | task_state | resize_migrating | | updated | 2023-08-29T20:02:05Z | | updated_at | 2023-08-29T20:02:05Z | | vm_state | active +-------------------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
Go further
For more information and tutorials, please see our other Public Cloud support guides or explore the guides for other OVHcloud products and services.