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Get the server ID for the VM you want to resize
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|---|---|---|
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jward@SCLT302:~$ openstack server list
+--------------------------------------+-------------+--------+-------------------------+-------------------------+----------+
| ID | Name | Status | Networks | Image | Flavor |
+--------------------------------------+-------------+--------+-------------------------+-------------------------+----------+
| 2081193e-0fa1-488d-96c9-d09575cd89cd | Resize Test | ACTIVE | Internal=172.16.112.125 | scientificlinux-7-nogui | l3.nano |
+--------------------------------------+-------------+--------+-------------------------+-------------------------+----------+ |
Get the flavor ID for the target flavor you want to resize to. Note that the flavor must be larger in all aspects - CPU, RAM, and Storage - you should receive an error should you select a smaller flavor for use in the next step. The
--sort-columnflag can be useful here.
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jward@SCLT302:~$ openstack flavor list --sort-column VCPUs
+--------------------------------------+-------------+--------+------+-----------+-------+-----------+
| ID | Name | RAM | Disk | Ephemeral | VCPUs | Is Public |
+--------------------------------------+-------------+--------+------+-----------+-------+-----------+
| 9ac55db3-da5a-41c0-8310-5700db30eb30 | l3.nano | 8192 | 50 | 0 | 2 | True |
| 300f36c7-603d-4c69-80d1-1dc610c309b8 | l3.micro | 16384 | 100 | 0 | 4 | True |
| 6dcd1f3e-bd1d-43b9-9668-8e07735fb550 | l3.tiny | 30720 | 200 | 0 | 8 | True |
| eb971b0d-c346-449f-b847-e0446132881e | l2.tiny | 30720 | 200 | 0 | 8 | True |
| db52ac2a-e74a-4295-a121-d1cde14cc884 | g-a100.x1hm | 204800 | 1600 | 0 | 12 | False |
| 287460a2-b111-41b5-b464-1159bd19c935 | l2.xsmall | 61440 | 400 | 0 | 16 | True |
| e86db4f3-716f-476f-80a0-a883cba35e51 | l3.xsmall | 61440 | 400 | 0 | 16 | True |
| 28d9bca0-064f-45ad-ac49-470ab5ebbcd4 | le3.small | 125952 | 100 | 700 | 30 | True |
| 56786106-b241-4d27-893f-c81c8d57bd05 | l2.small | 125952 | 800 | 0 | 30 | True |
| 5fb2e47d-c76a-4781-9723-177eef5f9b36 | l3.small | 125952 | 800 | 0 | 30 | True |
| 79dc0b4d-df3f-482d-83ba-8a5747cf5423 | le2.small | 125952 | 100 | 700 | 30 | True |
| 30e59608-0764-4e09-99e3-aabac36c91af | le2.medium | 250880 | 100 | 1500 | 60 | True |
| a840beb4-ea6e-490d-a532-f159b46e15ec | le3.medium | 250880 | 100 | 1500 | 60 | True |
| ca49af18-c7bc-4f2c-8e6a-e8ff6fca2719 | l3.medium | 250880 | 1600 | 0 | 60 | True |
| d798a374-002e-4257-bdac-324723e8f0b5 | l2.medium | 250880 | 1600 | 0 | 60 | True |
| 0d2555d9-23dc-4b40-a2f4-d03281d58719 | le3.large | 501760 | 100 | 3100 | 124 | True |
| 2747dd70-8358-4732-b463-48df00367689 | l3.large | 501760 | 3200 | 0 | 124 | True |
| 42622a7d-e0a2-420f-8eb3-b68993704e7f | le2.large | 501760 | 100 | 3100 | 124 | True |
| a92c93eb-a44a-443f-93d1-59b92249a7ba | l2.large | 501760 | 3200 | 0 | 124 | True |
+--------------------------------------+-------------+--------+------+-----------+-------+-----------+ |
Run the following command to resize the VM to the flavor you want, using it’s UUIDreplacing the UUID and flavor to match your VM’s details. Note that there is a
--helpflag for this openstack command, as with all others.
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jward@SCLT302:~$ openstack server resize --flavor l3.tiny 2081193e-0fa1-488d-96c9-d09575cd89cd |
You can monitor the progress of the resize using the following command, again replacing the UUID. The
watch -n 10is optional and you can periodically rerun the rest of the command manually instead.
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jward@SCLT302:~$ watch -n 10 openstack server show 2081193e-0fa1-488d-96c9-d09575cd89cd |
After a short while the VM state should change to
VERIFY_RESIZE, at this point you can check the machine and run the following command with your VM’s UUID to complete the process if you are satisfied that the resize has completed successfully.
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jward@SCLT302:~$ openstack server resize confirm 2081193e-0fa1-488d-96c9-d09575cd89cd |
| Note |
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If you test the machine and note any issues you can revert the process at this point by using the following command with your VM’s UUID instead. |
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jward@SCLT302:~$ openstack server resize revert 2081193e-0fa1-488d-96c9-d09575cd89cd |
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