Tencentcloud v1.2.0 plugin crash

[dstevensson]

Overview of the Issue

Tencentcloud plugin on version 1.2.0 panic upon calling packer build:

2025/03/05 10:48:49 packer-plugin-tencentcloud_v1.2.0_x5.0_linux_amd64 plugin: panic: interface conversion: interface {} is float64, not string

Reproduction Steps

• Use provided packer file.
• packer init example.pkr.hcl
• packer build example.pkr.hcl

Note that that the plugin crashes immediately. Version 1.1.0 does not have this problem.

Plugin and Packer version

Packer v1.12.0
Tencentcloud v1.2.0

Simplified Packer Buildfile

packer {
  required_plugins {
    tencentcloud = {
      version = "1.2.0"
      source  = "github.com/hashicorp/tencentcloud"
    }
  }
}

variable "secret_id" {
  type    = string
  default = "${env("TENCENTCLOUD_SECRET_ID")}"
}

variable "secret_key" {
  type    = string
  default = "${env("TENCENTCLOUD_SECRET_KEY")}"
}

source "tencentcloud-cvm" "autogenerated_1" {
  associate_public_ip_address = true
  disk_type                   = "CLOUD_PREMIUM"
  image_name                  = "PackerTest"
  instance_type               = "S3.SMALL1"
  packer_debug                = true
  region                      = "eu-frankfurt"
  secret_id                   = "${var.secret_id}"
  secret_key                  = "${var.secret_key}"
  source_image_id             = "img-487zeit5"
  ssh_username                = "root"
  zone                        = "eu-frankfurt-1"
}

build {
  sources = ["source.tencentcloud-cvm.autogenerated_1"]

  provisioner "shell" {
    inline = ["sleep 30"]
  }
}

Operating system and Environment details

Linux, x64
PopOS! (Ubuntu 22.04)
Kernel verison 6.9.3-76060903-generic

Log Fragments and crash.log files

Log and crash log available at https://gist.github.com/dstevensson/b7ccd5ee35d142c3e48756748a4e5e85

[ext-samstenvall-sc]

Unable to reproduce, are you sure you're using the latest version of Packer?

[dstevensson]

Hi!
Yes, I am indeed using latest packer:

~ ❯ packer --version
Packer v1.12.0

After some troubleshooting with some friends over at Tencent Cloud we came to the conclusion that the problem lies with the format of credentials file generated by tccli. If you use tccli auth login to get credentials via oauth the credentials file format looks like this (masked for obvious reasons):

~ ❯ cat ~/.tccli/default.credential
{
    "type": "oauth",
    "secretId": "masked",
    "secretKey": "masked",
    "token": "masked",
    "expiresAt": 1741350079,
    "oauth": {
        "openId": "masked",
        "accessToken": "masked",
        "expiresAt": 1741350078,
        "refreshToken": "masked",
        "site": "intl"
    }
}

I believe the plugin doesn't expect the credentials file to have this format and doesn't handle non-string values which causes it to crash. If I remove the file (or modify it only be strings and removing the oauth key) packer runs without crashing.

[ext-samstenvall-sc]

Nice find, that explains why I wasn't able to reproduce