gcloud alpha compute instance-groups managed update-instances

NAME
gcloud alpha compute instance-groups managed update-instances - immediately update selected instances in a Compute Engine managed instance group
SYNOPSIS
gcloud alpha 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
(ALPHA) 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 alpha 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 alpha 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"
Perform at least this action on each instance while updating. If the update requires a more disruptive action, then the more disruptive action is performed. MINIMAL_ACTION must be one of:
none
No action
refresh
Apply the new configuration without stopping instances, if possible. For example, use refresh to apply changes that only affect metadata or additional disks.
restart
Apply the new configuration without replacing instances, if possible. For example, stopping instances and starting them again is sufficient to apply changes to machine type.
replace
Replace old instances according to the --replacement-method flag.
--most-disruptive-allowed-action=MOST_DISRUPTIVE_ALLOWED_ACTION; default="replace"
Perform at most this 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. MOST_DISRUPTIVE_ALLOWED_ACTION must be one of:
none
No action
refresh
Apply the new configuration without stopping instances, if possible. For example, use refresh to apply changes that only affect metadata or additional disks.
restart
Apply the new configuration without replacing instances, if possible. For example, stopping instances and starting them again is sufficient to apply changes to machine type.
replace
Replace old instances according to the --replacement-method flag.
At most one of these may be specified:
--region=REGION
Region of the managed instance group to operate on. If not specified, you may 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 may 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: --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 ALPHA and may change without notice. If this command fails with API permission errors despite specifying the right project, you may be trying to access an API with an invitation-only early access allowlist. These variants are also available:
gcloud compute instance-groups managed update-instances
gcloud beta compute instance-groups managed update-instances