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gcloud beta compute instance-groups managed update-instances

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NAME

gcloud beta compute instance-groups managed update-instances - immediately update selected instances in a Compute Engine managed instance group

SYNOPSIS

gcloud beta compute instance-groups managed update-instances NAME (--all-instances     | --instances=INSTANCE,[INSTANCE,…]) [--minimal-action=MINIMAL_ACTION; default="none"] [--most-disruptive-allowed-action=MOST_DISRUPTIVE_ALLOWED_ACTION; default="replace"] [--region=REGION     | --zone=ZONE] [GCLOUD_WIDE_FLAG …]

DESCRIPTION

(BETA) When using a managed instance group, it's possible that your intended specification for a VM is different from the current state of that VM. For example, this can happen due to changes to the group's target instance template. This command enables you to initiate the update process on the given set of instances instantly, thus when your Managed Instance Group is stable you can be sure that all the changes were applied.

gcloud beta compute instance-groups managed update-instances allows you to specify the least and the most disruptive actions that can be performed while updating the instances. This way you can reduce the risk of rolling out too many changes at once. Possible actions are: none, refresh, restart and replace. The level of disruption to the instance is ordered as: none < refresh < restart < replace.

The command returns the operation status per instance, which might be FAIL, SUCCESS, or MEMBER_NOT_FOUND. MEMBER_NOT_FOUND is returned only for regional groups when the gcloud command-line tool wasn't able to resolve the zone from the instance name.

EXAMPLES

To update instances instance-1, instance-2 in my-group, with minimal-action=none and most-disruptive-allowed-action=restart, run:

gcloud beta compute instance-groups managed update-instances my-group --instances=instance-1,instance2 --minimal-action=none --most-disruptive-allowed-action=restart

POSITIONAL ARGUMENTS

NAME

Name of the managed instance group to operate on.

REQUIRED FLAGS

Exactly one of these must be specified:

--all-instances

Update all instances in the group.

--instances=INSTANCE,[INSTANCE,…]

Names of instances to update.

OPTIONAL FLAGS

--minimal-action=MINIMAL_ACTION; default="none"

Use this flag to minimize disruption as much as possible or to apply a more disruptive action than is strictly necessary. The MIG performs at least this action on each instance while updating. If the update requires a more disruptive action than the one specified here, then the more disruptive action is performed. If you omit this flag, the update uses the minimal-action value from the MIG's update policy, unless it is not set in which case the default is replace.

MINIMAL_ACTION must be one of:

none

No action

refresh

Apply the new configuration without stopping VMs, if possible. For example, use ``refresh`` to apply changes that only affect metadata or additional disks.

restart

Apply the new configuration without replacing VMs, if possible. For example, stopping VMs and starting them again is sufficient to apply changes to machine type.

replace

Replace old VMs according to the --replacement-method flag.

--most-disruptive-allowed-action=MOST_DISRUPTIVE_ALLOWED_ACTION; default="replace"

Use this flag to prevent an update if it requires more disruption than you can afford. At most, the MIG performs the specified action on each instance while updating. If the update requires a more disruptive action than the one specified here, then the update fails and no changes are made. If you omit this flag, the update uses the most-disruptive-allowed-action value from the MIG's update policy, unless it is not set in which case the default is replace.

MOST_DISRUPTIVE_ALLOWED_ACTION must be one of:

none

No action

refresh

Apply the new configuration without stopping VMs, if possible. For example, use ``refresh`` to apply changes that only affect metadata or additional disks.

restart

Apply the new configuration without replacing VMs, if possible. For example, stopping VMs and starting them again is sufficient to apply changes to machine type.

replace

Replace old VMs according to the --replacement-method flag.

At most one of these can be specified:

--region=REGION

Region of the managed instance group to operate on. If not specified, you might be prompted to select a region (interactive mode only).

A list of regions can be fetched by running:

gcloud compute regions list

Overrides the default compute/region property value for this command invocation.

--zone=ZONE

Zone of the managed instance group to operate on. If not specified, you might be prompted to select a zone (interactive mode only).

A list of zones can be fetched by running:

gcloud compute zones list

Overrides the default compute/zone property value for this command invocation.

GCLOUD WIDE FLAGS

These flags are available to all commands: --access-token-file, --account, --billing-project, --configuration, --flags-file, --flatten, --format, --help, --impersonate-service-account, --log-http, --project, --quiet, --trace-token, --user-output-enabled, --verbosity.

Run $ gcloud help for details.

NOTES

This command is currently in beta and might change without notice. These variants are also available:

gcloud compute instance-groups managed update-instances

gcloud alpha compute instance-groups managed update-instances

Except as otherwise noted, the content of this page is licensed under the Creative Commons Attribution 4.0 License, and code samples are licensed under the Apache 2.0 License. For details, see the Google Developers Site Policies. Java is a registered trademark of Oracle and/or its affiliates.

Last updated 2025-05-07 UTC.

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