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

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

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

Inserts or updates per-instance configurations for the managed instance
group. perInstanceConfig.name serves as a key used to
distinguish whether to perform insert or patch.

## Path parameters

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

## Query parameters

- `requestId` string

## Request body

- InstanceGroupManagersUpdatePerInstanceConfigsReq — InstanceGroupManagers.updatePerInstanceConfigs
  - `perInstanceConfigs` PerInstanceConfig[] — The list of per-instance configurations to insert or patch on this managed instance group.
    - `preservedState` PreservedState — Preserved state for a given instance.
      - `disks` object — Preserved disks defined for this instance. This map is keyed with the device names of the disks.
      - `internalIPs` object — Preserved internal IPs defined for this instance. This map is keyed with the name of the network interface.
      - `metadata` object — Preserved metadata defined for this instance.
      - `externalIPs` object — Preserved external IPs defined for this instance. This map is keyed with the name of the network interface.
    - `fingerprint` string, byte — Fingerprint of this per-instance config. This field can be used in optimistic locking. It is ignored when inserting a per-instance config. An up-to-date fingerprint must be provided in order to update an existing per-instance configuration or the field needs to be unset.
    - `status` 'APPLYING' | 'DELETING' | 'EFFECTIVE' | 'NONE' | 'UNAPPLIED' | 'UNAPPLIED_DELETION' — The status of applying this per-instance configuration on the corresponding managed instance.
    - `name` string — The name of a per-instance configuration and its corresponding instance. Serves as a merge key during UpdatePerInstanceConfigs operations, that is, if a per-instance configuration with the same name exists then it will be updated, otherwise a new one will be created for the VM instance with the same name. An attempt to create a per-instance configuration for a VM instance that either doesn't exist or is not part of the group will result in an error.

## 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)