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feat: supervise user-defined workspace services - #921
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Install Supervisor in the workspace image and expose a dynamic list of service commands through the template. Apply dotfiles before launching the unprivileged supervisor and resolve each command from JSON by index. Keep shell implementations in mounted scripts rather than HCL.
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Summary
service_commandslist parameter, with one automatically restarted Supervisor program per commandsupervisord.conf; no shell or Terraform generates configuration for another toolDesign
flowchart LR Parameter[service_commands list] --> JSON[Coder environment JSON] Dotfiles[Chezmoi update or apply] -->|success| Launcher[Supervisor launcher] JSON --> Launcher Launcher --> P0[service-0] Launcher --> PN[service-N]Command text remains in JSON and each Supervisor process invokes a wrapper by list index. The static Supervisor configuration expands only the process count from the environment, avoiding interpolation of user commands into INI syntax. Supervisor and its children run as the existing unprivileged
coderuser; PID 1 remains the Coder agent.A failed Chezmoi run starts no services. With no dotfiles repository configured, the explicit no-op path completes before services start.
Verification
pre-commit run --all-filestofu validatetflint --config=../../../.tflint.hclshellcheck templates/kubernetes/homelab-workspace/script-*.shsandbox-dockerFor template-only changes,
test-templatecontinues to use the latest released image. For image changes,test-imagepasses its published branch image into the reusable template integration workflow. That workflow loads the existing image into Kind rather than rebuilding it, then runs two services: one deliberately exits to prove restart and one remains running to prove multiple commands become independent processes. Both record any pre-Chezmoi start. The assertions require no early-start marker, at least two invocations of the restarting service, the steady-service marker, and both Supervisor process statuses.The commit uses the required empty scope for an atomic image-plus-template feature.