gcloud beta compute os-config os-upgrade - upgrade the instances OS version

gcloud beta compute os-config os-upgradeINSTANCE_NAME--source-os=SOURCE_OS--target-os=TARGET_OS[--async][--auto-rollback][--no-create-machine-backup][--log-location=LOG_LOCATION][--timeout=TIMEOUT; default="2h"][--zone=ZONE][GCLOUD_WIDE_FLAG …]

OS Upgrade involves:

• Create a snapshot and/or machine image for the instance.
• Create an install media disk and attach it to the instance.
• Upgrade the OS version.
• Cleanup install media disk after upgrade.

Virtual instances, snapshots, machine images, and disks in Compute Engine andfiles stored on Cloud Storage incur charges. Seehttps://cloud.google.com/compute/docs/images/importing-virtual-disks#resource_cleanup.

INSTANCE_NAME

Name of the instance to os-upgrade. For details on valid instance names, referto the criteria documented under the field 'name' at:https://cloud.google.com/compute/docs/reference/rest/v1/instances

--source-os=SOURCE_OS

OS version of the source instance to upgrade.SOURCE_OSmust be (only one value is supported):windows-2008r2.

--target-os=TARGET_OS

Version of the OS after upgrade.TARGET_OS must be (onlyone value is supported):windows-2012r2.

--async

Return immediately, without waiting for the operation in progress to complete.

--auto-rollback

When auto rollback is enabled, the instance and its resources are restored totheir original state. Otherwise, the instance and any temporary resources areleft in the intermediate state of the time of failure. This is useful fordebugging.

--create-machine-backup

When enabled, a machine image is created that backs up the original state ofyour instance. Enabled by default, use--no-create-machine-backupto disable.

--log-location=LOG_LOCATION

Directory in Cloud Storage to hold build logs. If not set,gs://<project num>.cloudbuild-logs.googleusercontent.com/ iscreated and used.

--timeout=TIMEOUT; default="2h"

Maximum time an upgrade can last before it fails as "TIMEOUT". For example, ifyou specify2h, the process fails after 2 hours. See $gcloud topic datetimes forinformation about duration formats.

This timeout option has a maximum value of 24 hours.

--zone=ZONE

Zone of the instance to os-upgrade. If not specified and thecompute/zone property isn't set, you mightbe prompted to select a zone (interactive mode only).

To avoid prompting when this flag is omitted, you can set thecompute/zone property:

gcloudconfigsetcompute/zoneZONE

A list of zones can be fetched by running:

gcloudcomputezoneslist

To unset the property, run:

gcloudconfigunsetcompute/zone

Alternatively, the zone can be stored in the environment variableCLOUDSDK_COMPUTE_ZONE.

Run$gcloud help for details.