---
title: "POST /projects/{project}/zones/{zone}/instanceGroupManagers/{instanceGroupManager}/applyUpdatesToInstances"
method: POST
path: "/projects/{project}/zones/{zone}/instanceGroupManagers/{instanceGroupManager}/applyUpdatesToInstances"
tags: ["instanceGroupManagers"]
---

# POST /projects/{project}/zones/{zone}/instanceGroupManagers/{instanceGroupManager}/applyUpdatesToInstances

`POST /projects/{project}/zones/{zone}/instanceGroupManagers/{instanceGroupManager}/applyUpdatesToInstances`

Applies changes to selected instances on the managed instance group.
This method can be used to apply new overrides and/or new versions.

## Path parameters

- `project` string, required
- `zone` string, required
- `instanceGroupManager` string, required

## Request body

- InstanceGroupManagersApplyUpdatesRequest — InstanceGroupManagers.applyUpdatesToInstances
  - `instances` string[] — The list of URLs of one or more instances for which you want to apply updates. Each URL can be a full URL or a partial URL, such aszones/[ZONE]/instances/[INSTANCE_NAME].
  - `minimalAction` 'NONE' | 'REFRESH' | 'REPLACE' | 'RESTART' — The minimal action that you want to perform on each instance during the update: - REPLACE: At minimum, delete the instance and create it again. - RESTART: Stop the instance and start it again. - REFRESH: Do not stop the instance and limit disruption as much as possible. - NONE: Do not disrupt the instance at all. By default, the minimum action is NONE. If your update requires a more disruptive action than you set with this flag, the necessary action is performed to execute the update.
  - `mostDisruptiveAllowedAction` 'NONE' | 'REFRESH' | 'REPLACE' | 'RESTART' — The most disruptive action that you want to perform on each instance during the update: - REPLACE: Delete the instance and create it again. - RESTART: Stop the instance and start it again. - REFRESH: Do not stop the instance and limit disruption as much as possible. - NONE: Do not disrupt the instance at all. By default, the most disruptive allowed action is REPLACE. If your update requires a more disruptive action than you set with this flag, the update request will fail.
  - `allInstances` boolean — Flag to update all instances instead of specified list of “instances”. If the flag is set to true then the instances may not be specified in the request.

## Response `200`

Successful response

---

[API](https://skmtc.net/google/apis/compute.md) · [All operations](https://skmtc.net/google/apis/compute/llms.txt) · [OpenAPI document](https://skmtc-service-staging.skmtc.workers.dev/v1/apis/google/compute/revisions/6120ed8969d4/schema)