Added/removed accessConfigs after inital instance creation do not get recognized

[tferazzi]

What happened?

Deploying an instance with a public IP initially and removing it afterwards does not get recognized by pulumi.

Example

Deploying an instance with a public IP like this:

new gcp.compute.Instance('my-instance-name', {
    name: 'my-instance-name',
    zone: 'europe-west4-a',
    machineType: 'f1-micro',
    networkInterfaces: [
      {
        subnetwork: args.subnetworkId,
        accessConfigs: [
          {
            networkTier: 'PREMIUM',
          },
        ],
      },
    ],
    bootDisk: {
      initializeParams: {
        image: 'ubuntu-2204-jammy-v20230727',
      },
    },
  });

And then removing the accessConfigs block like this:

new gcp.compute.Instance('my-instance-name', {
    name: 'my-instance-name',
    zone: 'europe-west4-a',
    machineType: 'f1-micro',
    networkInterfaces: [
      {
        subnetwork: args.subnetworkId,
        // accessConfigs: [
        //   {
        //     networkTier: 'PREMIUM',
        //   },
        // ],
      },
    ],
    bootDisk: {
      initializeParams: {
        image: 'ubuntu-2204-jammy-v20230727',
      },
    },
  });

And doing pulumi up again, results in no update/change of the instance.

Output of pulumi about

CLI
Version      3.88.0
Go Version   go1.21.2
Go Compiler  gc

Plugins
NAME    VERSION
nodejs  unknown

Host
OS       darwin
Version  13.6
Arch     arm64

Additional context

This also does not work the other way round:

1. Instance without public IP address
2. Add accessConfigs block to networkInterfaces
3. pulumi up -> results in no changes

Contributing

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[mikhailshilkov]

I can repro this issue locally, here is a full program:

import * as pulumi from "@pulumi/pulumi";
import * as gcp from "@pulumi/gcp";

new gcp.compute.Instance('my-instance-name', {
    name: 'my-instance-name',
    zone: 'europe-west4-a',
    machineType: 'f1-micro',
    networkInterfaces: [
      {
        network: "default",
        accessConfigs: [
          {
            networkTier: 'PREMIUM',
          },
        ],
      },
    ],
    bootDisk: {
      initializeParams: {
        image: 'ubuntu-2204-jammy-v20230727',
      },
    },
  });

cc @t0yv0 on another diff issue.

[mjeffryes]

Unfortunately, it looks like this issue hasn't seen any updates in a while. If you're still encountering this problem, could you leave a quick comment to let us know so we can prioritize it?

[tferazzi]

Hi, just tested this again: Removing the accessConfigs block now results in a diff/replace. So everything working as expected. Thank you for following up on this.

Tested with

> pulumi about

CLI
Version      3.134.0
Go Version   go1.23.1
Go Compiler  gc

Plugins
KIND      NAME    VERSION
resource  gcp     7.38.0
language  nodejs  3.134.0-dev.0

Host
OS       darwin
Version  14.7
Arch     arm64