GCP routes don't support updating @pulumi/gcp version

[carlpaten-ivadolabs]

Describe what happened

I upgraded Pulumi and now my routes are giving me trouble:

Updating (main):
  pulumi:pulumi:Stack: (same)
    [urn=urn:pulumi:main::cwpe::pulumi:pulumi:Stack::cwpe]
    ~ gcp:compute/route:Route: (update)
        [id=projects/cwpe-project/global/routes/default-route]
        [urn=urn:pulumi:main::cwpe::gcp:compute/route:Route::cwpe-vpc-internet-route]
        [provider=urn:pulumi:main::cwpe::pulumi:providers:gcp::default_8_32_1::49c7a01e-23c1-4d21-99fa-b17c8a89a5ec]
      + asPaths : <null>
      + warnings: <null>
error:   sdk-v2/provider2.go:566: sdk.helper_schema: doesn't support update: provider=google-beta@8.32.1

error: 1 error occurred:
	* updating urn:pulumi:main::cwpe::gcp:compute/route:Route::cwpe-vpc-internet-route: 1 error occurred:
	* doesn't support update

Sample program

export const cwpe_vpc_internet_route = new gcp.compute.Route(
  'default-route',
  {
    description: 'Default route to the Internet.',
    destRange: '0.0.0.0/0',
    name: 'default-route',
    network: 'cwpe-vpc',
    nextHopGateway:
      'https://www.googleapis.com/compute/beta/projects/cwpe-vpc/global/gateways/default-internet-gateway',
    project: 'cwpe',
  },
)

Log output

Updating (main):
  pulumi:pulumi:Stack: (same)
    [urn=urn:pulumi:main::cwpe::pulumi:pulumi:Stack::cwpe]
    ~ gcp:compute/route:Route: (update)
        [id=projects/cwpe-project/global/routes/default-route]
        [urn=urn:pulumi:main::cwpe::gcp:compute/route:Route::cwpe-vpc-internet-route]
        [provider=urn:pulumi:main::cwpe::pulumi:providers:gcp::default_8_32_1::49c7a01e-23c1-4d21-99fa-b17c8a89a5ec]
      + asPaths : <null>
      + warnings: <null>
error:   sdk-v2/provider2.go:566: sdk.helper_schema: doesn't support update: provider=google-beta@8.32.1

error: 1 error occurred:
	* updating urn:pulumi:main::cwpe::gcp:compute/route:Route::cwpe-vpc-internet-route: 1 error occurred:
	* doesn't support update

Affected Resource(s)

Route

Output of pulumi about

pulumi about
CLI          
Version      3.170.0
Go Version   go1.24.3
Go Compiler  gc

Plugins
KIND      NAME          VERSION
resource  docker-build  0.0.10
resource  gcp           8.32.1
resource  gcp           8.20.0
resource  gcp           8.19.0
resource  kubernetes    4.23.0
language  nodejs        3.170.0
resource  random        4.18.0
resource  twingate      3.0.16

Host     
OS       darwin
Version  15.4.1
Arch     arm64

This project is written in nodejs: executable='/Users/carl/.nvm/versions/node/v22.13.1/bin/node' version='v22.13.1'

Current Stack: organization/pulumi-infra/main

...

Found no pending operations associated with main

Additional context

No response

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[Zaid-Ajaj]

Hi there @carlpaten thanks for raising the issue! This is definitely not ideal. I am trying to reproduce with latest gcp provider v8.32.1 but it updates fine for me. Can you share the previous provider version from which you upgraded?

Here is how I tried to repro with pulumi new gcp-typescript then

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

const network = new gcp.compute.Network("default", {
    name: "compute-network",
});

const defaultRoute = new gcp.compute.Route("my-route", {
    name: "network-route",
    network: network.name,
    destRange: "15.0.0.0/24",
    nextHopIp: "10.132.1.5",
    priority: 100,
});

export const networkId = network.id;

Running pulumi up --yes

     Type                    Name              Status            
 +   pulumi:pulumi:Stack     gcproutetest-dev  created (69s)     
 +   ├─ gcp:compute:Network  default           created (54s)     
 +   └─ gcp:compute:Route    my-route          created (12s)     

Outputs:
    networkId: "projects/<project-id>/global/networks/compute-network"

Resources:
    + 3 created

then I changed priority: 100 to priority: 1000 and then the route was updated, well it was a replacement for priority

     Type                  Name              Status             Info
     pulumi:pulumi:Stack   gcproutetest-dev                     
 +-  └─ gcp:compute:Route  my-route          replaced (11s)     [diff: ~priority]

Outputs:
    networkId: "projects/<project-id>/global/networks/compute-network"

Resources:
    +-1 replaced
    2 unchanged

Duration: 26s

[bruno-espino]

@Zaid-Ajaj The issue happens when you upgrade the provider because there was a change in the schema,
hence it trying to add:

+ asPaths : <null>
+ warnings: <null>

Can confirm I also hit it when upgrading from 8.20.0 to 8.32.1

This seems to be fixed after a pulumi refresh

[t0yv0]

Hi @bruno-espino checking this out again, I'm glad you found a workaround with pulumi refresh. @carlpaten can you confirm you can work around the problem?

This is an interesting resource that does not have the Update method implemented. Presumably in-place updates should never be planned for this resource. The are two kinds of properties: Optional/Requred with ForceNew (that should cause replacements), and Computed properties such as asPaths and warnings that should only be set by the provider. However we do have an Update planned here because of a change in Computed property, which seems wrong.

I have built a quick test to verify this behavior and cross-check Pulumi and Terraform behavior. It appears that Pulumi is inheriting this problem from Terraform. That is under vanialla Terraform with either default or -refresh=false the error also is present, and Pulumi is inheriting the problem:

pulumi/pulumi-terraform-bridge#3117

If I have not missed anything in this analysis, this problem best reported and fixed upstream.