Creating a K8s Devcontainer Template Step: "Invalid registry module source address"

[michaelvp411]

##Title
Template push fails with "Invalid registry module source address" for jetbrains module

Description

When attempting to push the kubernetes-devcontainer template, the template push fails during the "Detecting persistent resources" phase with an invalid module registry source address error.

Steps to Reproduce

1. Navigate to the kubernetes-devcontainer template directory
2. Run coder template push kubernetes-devcontainer -d .
3. Confirm upload when prompted

Expected Behavior

Template should push successfully without module source address errors.

Actual Behavior

Template push fails with the following error:
==> ⧗ Detecting persistent resources
2025-09-18 18:48:57.303Z Error: Invalid registry module source address
2025-09-18 18:48:57.303Z on main.tf line 437, in module "jetbrains":
2025-09-18 18:48:57.303Z 437: source = "registry.coder.com/modules/coder/jetbrains/coder"
2025-09-18 18:48:57.303Z Failed to parse module registry address: a module registry source address
2025-09-18 18:48:57.303Z must have either three or four slash-separated components.

Environment

• Coder deployment: EKS cluster
• Template: kubernetes-devcontainer (from workshop materials)
• User authenticated successfully via CLI

Additional Context

This appears to be a formatting issue with the module source address in the template. The current format uses 4 components when Terraform expects 3 or 4 in a specific pattern.

[michaelvp411]

Here's a summary of the code changes needed for the GitHub issue comment:

Code Changes Required

Two module source addresses need to be corrected:

1. Line ~424 - code-server module:

   # Change from:
   source = "registry.coder.com/modules/coder/code-server/coder"
   # To:
   source = "registry.coder.com/modules/code-server/coder"

2. Line ~437 - jetbrains module:

   # Change from:
   source = "registry.coder.com/modules/coder/jetbrains/coder"
   # To:
   source = "registry.coder.com/modules/jetbrains/coder"

Additionally, remove unsupported parameters:

3. Remove agent_name = "main" from both modules (lines ~430 and ~443)
   • This parameter is not supported in the current module versions
   • Keep agent_id, order (code-server), and folder (jetbrains) parameters

Root cause: The original template uses 4-component module addresses (registry.coder.com/modules/coder/{module}/coder) when the Coder registry expects 3-component format (registry.coder.com/modules/{module}/coder). The extra /coder/ component in the path is causing Terraform's module address parser to fail.

This appears to be an issue with the workshop template having outdated module source formats that don't match the current Coder module registry structure.

[greg-the-coder]

Here's the full source that I will need to create a PR for in the coder/registry repo for the kubernetes-devcontainer template:

# See https://registry.coder.com/modules/coder/code-server
module "code-server" {
  count  = data.coder_workspace.me.start_count
  source   = "registry.coder.com/coder/code-server/coder"

  # This ensures that the latest non-breaking version of the module gets downloaded, you can also pin the module version to prevent breaking changes in production.
  version = "~> 1.0"

  agent_id   = coder_agent.main.id
  order      = 1
}

# See https://registry.coder.com/modules/coder/jetbrains
module "jetbrains" {
  count      = data.coder_workspace.me.start_count
  source   = "registry.coder.com/coder/jetbrains/coder"
  version  = "~> 1.0"
  agent_id   = coder_agent.main.id
  agent_name = "main"
  folder     = "/home/coder"
}

[greg-the-coder]

Created coder/registry#428 to correct issue.