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68 lines
1.9 KiB
Plaintext
68 lines
1.9 KiB
Plaintext
// Module included in the following assemblies:
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//
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// * virt/virtual_machines/creating_vm/virt-creating-vms-from-instance-types.adoc
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:_mod-docs-content-type: PROCEDURE
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[id="virt-change-vm-instance-type-cli_{context}"]
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= Changing the instance type of a VM by using the CLI
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[role="_abstract"]
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To change the instance type of a VM, change the `name` field in the VM spec. This triggers the update logic, which ensures that a new, immutable controller revision snapshot is taken of the new resource configuration.
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.Prerequisites
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* You have installed the {oc-first}.
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* You created the VM by using an instance type, or have administrator privileges for the VM that you want to modify.
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.Procedure
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. Stop the VM.
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. Run the following command, and replace `<vm_name>` with the name of your VM, and `<new_instancetype>` with the name of the instance type you want to change to:
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+
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[source,terminal]
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----
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$ oc patch vm/<vm_name> --type merge -p '{"spec":{"instancetype":{"name": "<new_instancetype>"}}}'
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----
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.Verification
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* Check the controller revision reference in the updated VM `status` field. Run the following command and verify that the revision name is updated in the output:
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[source,terminal]
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----
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$ oc get vms/<vm_name> -o json | jq .status.instancetypeRef
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----
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*Example output*
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[source,terminal]
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----
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{
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"controllerRevisionRef": {
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"name": "vm-cirros-csmall-csmall-3e86e367-9cd7-4426-9507-b14c27a08671-2"
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},
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"kind": "VirtualMachineInstancetype",
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"name": "csmall"
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}
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----
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* Optional: Check that the VM instance is running the new configuration defined in the latest controller revision. For example, if you updated the instance type to use 2 vCPUs instead of 1, run the following command and check the output:
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[source,terminal]
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----
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$ oc get vmi/<vm_name> -o json | jq .spec.domain.cpu
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----
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*Example output that verifies that the revision uses 2 vCPUs*
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[source,terminal]
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----
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{
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"cores": 1,
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"model": "host-model",
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"sockets": 2,
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"threads": 1
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}
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----
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