Unexepected diff with lightsail.InstancePublicPorts

[markovejnovic]

Describe what happened

Hi pulumi community! I'm relatively new to pulumi (and IAC in general) and I have been trying to setup a simple Pulumi project which provisions a lightsail instance.

Things have been going great until I attempted to setup the public ports via lightsail.InstancePublicPorts and have observed that a diff is reported when attempting to do a pulumi refresh even though there is no observable change.

The output I get is:

EC2_ROOT_PUBKEY=$(cat ~/.ssh/id_ed25519.pub) pulumi refresh
Previewing refresh (dev)

View in Browser (Ctrl+O): https://app.pulumi.com/ChopIt/chopit-aws/dev/previews/47baca55-9b6f-4896-b440-d9f5ab8533cc

     Type                                  Name                         Plan       Info
     pulumi:pulumi:Stack                   chopit-aws-dev                          
     ├─ aws:lightsail:StaticIp             devdb-static-ip                         
     ├─ aws:lightsail:KeyPair              devdb-root-keypair                      
     ├─ aws:lightsail:Instance             devdb-lightsail                         
     ├─ aws:lightsail:StaticIpAttachment   devdb-static-ip-attachement             
 ~   └─ aws:lightsail:InstancePublicPorts  devdb-public-ports           update     [diff: ~portInfos]

Resources:
    ~ 1 to update
    5 unchanged

Do you want to perform this refresh?
No resources will be modified as part of this refresh; just your stack's state will be.
 details
  pulumi:pulumi:Stack: (same)
    [urn=urn:pulumi:dev::chopit-aws::pulumi:pulumi:Stack::chopit-aws-dev]
    ~ aws:lightsail/instancePublicPorts:InstancePublicPorts: (update)
        [id=devdb-lightsail-332932181]
        [urn=urn:pulumi:dev::chopit-aws::aws:lightsail/instancePublicPorts:InstancePublicPorts::devdb-public-ports]
        [provider=urn:pulumi:dev::chopit-aws::pulumi:providers:aws::default_6_52_0::af70e6c2-ddd1-45ac-8c11-2f826927300f]
      ~ portInfos: [
          ~ [0]: {
                  ~ fromPort: 22 => 22
                  ~ protocol: "tcp" => "tcp"
                  ~ toPort  : 22 => 22
                }
          ~ [1]: {
                  ~ fromPort: 443 => 443
                  ~ protocol: "tcp" => "tcp"
                  ~ toPort  : 443 => 443
                }
          ~ [2]: {
                  ~ fromPort: 5432 => 5432
                  ~ protocol: "tcp" => "tcp"
                  ~ toPort  : 5432 => 5432
                }
          ~ [3]: {
                  ~ fromPort: 80 => 80
                  ~ protocol: "tcp" => "tcp"
                  ~ toPort  : 80 => 80
                }
        ]

I've attached an image to showcase the fact that pulumi, in fact, appears to observe a diff between identical ports?

Sample program

A sample program is available as a gist.

Log output

The command that produced the log is:

EC2_ROOT_PUBKEY=$(cat ~/.ssh/id_ed25519.pub) pulumi refresh  --logtostderr --logflow -v=10 --preview-only 2>&1

The log is available as a gist.

Affected Resource(s)

pulumi refresh, pulumi up

Output of pulumi about

CLI          
Version      3.132.0
Go Version   go1.23.1
Go Compiler  gc

Plugins
KIND      NAME    VERSION
resource  aws     6.52.0
language  python  unknown

Host     
OS       fedora
Version  40
Arch     x86_64

This project is written in python: executable='/home/marko/.cache/pypoetry/virtualenvs/non-package-mode-p4ERSymB-py3.12/bin/python' version='3.12.6'

Backend        
Name           pulumi.com
URL            https://app.pulumi.com/mvejnovic
User           mvejnovic
Organizations  mvejnovic, ChopIt
Token type     personal

Dependencies:
NAME        VERSION
pip         24.2
pulumi_aws  6.52.0
ruff        0.6.7

Pulumi locates its logs in /tmp by default

Additional context

No response

Contributing

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[t0yv0]

I'm sorry this is not working as expected! This appears to be another instance of a known issue pulumi/pulumi-terraform-bridge#1904