---
title: "POST /projects/{project}/regions/{region}/instanceGroupManagers/{instanceGroupManager}/resumeInstances"
method: POST
path: "/projects/{project}/regions/{region}/instanceGroupManagers/{instanceGroupManager}/resumeInstances"
tags: ["regionInstanceGroupManagers"]
---

# POST /projects/{project}/regions/{region}/instanceGroupManagers/{instanceGroupManager}/resumeInstances

`POST /projects/{project}/regions/{region}/instanceGroupManagers/{instanceGroupManager}/resumeInstances`

Flags the specified instances in the managed instance group to be
resumed. This method increases thetargetSize and decreases the targetSuspendedSize
of the managed instance group by the number of instances that you resume.
The resumeInstances operation is marked DONE if
the resumeInstances request is successful. The underlying
actions take additional time. You must separately verify the status of theRESUMING action with thelistmanagedinstances
method.

In this request, you can only specify instances that are suspended. For
example, if an instance was previously suspended using the suspendInstances
method, it can be resumed using the resumeInstances method.

If a health check is attached to the managed instance group, the specified
instances will be verified as healthy after they are resumed.

You can specify a maximum of 1000 instances with this method per request.

## Path parameters

- `project` string, required
- `region` string, required
- `instanceGroupManager` string, required

## Query parameters

- `requestId` string

## Request body

- RegionInstanceGroupManagersResumeInstancesRequest
  - `instances` string[] — The URLs of one or more instances to resume. This can be a full URL or a partial URL, such as zones/[ZONE]/instances/[INSTANCE_NAME].

## 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)