gcloud alpha compute instance-groups managed rolling-action start-update

NAME
gcloud alpha compute instance-groups managed rolling-action start-update - updates instances in a managed instance group
SYNOPSIS
gcloud alpha compute instance-groups managed rolling-action start-update NAME --version=[template=TEMPLATE,[name=NAME],…] [--canary-version=[template=TEMPLATE,target-size=FIXED_OR_PERCENT,[name=NAME],…]] [--type=TYPE; default="proactive"] [--force] [--max-surge=MAX_SURGE] [--max-unavailable=MAX_UNAVAILABLE] [--min-ready=MIN_READY] [--minimal-action=MINIMAL_ACTION] [--most-disruptive-allowed-action=MOST_DISRUPTIVE_ALLOWED_ACTION] [--replacement-method=REPLACEMENT_METHOD] [--region=REGION     | --zone=ZONE] [GCLOUD_WIDE_FLAG …]
DESCRIPTION
(ALPHA) gcloud alpha compute instance-groups managed rolling-action start-update updates instances in a managed instance group, according to the given versions and the given update policy.

An instance template version can be either a global or regional resource.

EXAMPLES
Running: 
gcloud alpha compute instance-groups managed rolling-action start-update example-managed-instance-group \
--version='template=example-global-instance-template'

Sets the group's instance template version to a global instance template resource 'example-global-instance-template'.

To use a regional instance template, specify the full or partial URL of the template.

Running: 

gcloud alpha compute instance-groups managed rolling-action start-update example-managed-instance-group \
--version='template=projects/example-project/regions/us-central1/instanceTemplates/example-regional-instance-template'

Sets the group's instance template version to a regional instance template resource 'example-regional-instance-template'.

POSITIONAL ARGUMENTS
NAME
Name of the managed instance group to operate on.
REQUIRED FLAGS
--version=[template=TEMPLATE,[name=NAME],…]
Original instance template resource to be used. Each version has the following format: template=TEMPLATE,[name=NAME]
COMMONLY USED FLAGS
--canary-version=[template=TEMPLATE,target-size=FIXED_OR_PERCENT,[name=NAME],…]
New instance template resource to be used. Each version has the following format: template=TEMPLATE,target-size=FIXED_OR_PERCENT,[name=NAME]
--type=TYPE; default="proactive"
Desired update type. TYPE must be one of:
opportunistic
Do not proactively replace VMs. Create new VMs and delete old ones on resizes of the group and when you target specific VMs to be updated or recreated.
proactive
Replace instances proactively.
OTHER FLAGS
--force
If set, accepts any original or new version configurations without validation.
--max-surge=MAX_SURGE
Maximum additional number of instances that can be created during the update process. This can be a fixed number (e.g. 5) or a percentage of size to the managed instance group (e.g. 10%). Defaults to 0 if the managed instance group has stateful configuration, or to the number of zones in which it operates otherwise.
--max-unavailable=MAX_UNAVAILABLE
Maximum number of instances that can be unavailable during the update process. This can be a fixed number (e.g. 5) or a percentage of size to the managed instance group (e.g. 10%). Defaults to the number of zones in which the managed instance group operates.
--min-ready=MIN_READY
Minimum time for which a newly created instance should be ready to be considered available. For example 10s for 10 seconds. See $ gcloud topic datetimes for information on duration formats.
--minimal-action=MINIMAL_ACTION
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:

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
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:

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.
--replacement-method=REPLACEMENT_METHOD
Type of replacement method. Specifies what action will be taken to update instances. Defaults to ``recreate`` if the managed instance group has stateful configuration, or to ``substitute`` otherwise. REPLACEMENT_METHOD must be one of:
recreate
Recreate instances and preserve the instance names. The instance IDs and creation timestamps might change.
substitute
Delete old instances and create instances with new names.
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 alpha and might change without notice. If this command fails with API permission errors despite specifying the correct project, you might be trying to access an API with an invitation-only early access allowlist. These variants are also available: 
gcloud compute instance-groups managed rolling-action start-update
 
gcloud beta compute instance-groups managed rolling-action start-update