Add tart VM tester pool role (gecko_t_osx_1500_m_vms) for host-mediated vault injection#47
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…ed vault injection
Onboards the macOS Tart VM tester pool to the broker so the credential-free VM
images can get their Taskcluster vault at runtime instead of having it baked in
/ left on the build runner (the root cause of Bug 2049579).
Adds the role (+ a staging variant) in the two standard places:
* puppet_roles (variables.tf) -> creates an empty vault-<role> Secret Manager
container via secrets.tf for_each; value populated separately with
`gcloud secrets versions add`, out of state/git.
* SCEP_ROLES (bootstrap-step-ca.sh) -> one SCEP provisioner per role, created
on the next CA bootstrap.
Trust model: the MDM-enrolled tart *host* authenticates to the broker as the VM
pool role (its SCEP cert identity) and fetches + injects that vault into the VM
at launch. The VMs themselves are not MDM-enrolled, so they can't authenticate
to the broker directly — the host mediates.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
jwmossmoz
approved these changes
Jul 16, 2026
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Onboards the macOS Tart VM tester pool (
gecko-t-osx-1500-m-vms, + a_stagingvariant) to the broker, so credential-free VM images can fetch their Taskcluster vault at runtime instead of baking it into the image / leaving it on the build runner — the root cause of Bug 2049579.Adds the role in the two standard places (matches the arm64 onboarding):
puppet_roles(variables.tf) →secrets.tffor_eachcreates an emptyvault-gecko_t_osx_1500_m_vms(+_staging) Secret Manager container; values populated separately viagcloud secrets versions add, out of state/git.SCEP_ROLES(bootstrap-step-ca.sh) → one SCEP provisioner per role, created on the next CA bootstrap.Trust model: the VMs are not MDM-enrolled, so they can't authenticate to the broker themselves. The MDM-enrolled tart host authenticates as the VM pool role (its SCEP cert identity), fetches that vault, and injects it into the credential-free VM at launch.
Rollout after merge:
terraform apply(creates the empty containers) →gcloud secrets versions add vault-gecko_t_osx_1500_m_vms --data-file=…(tester vault — L1/try, low-sensitivity, token already rotated) → re-run CA bootstrap for the SCEP provisioner → SimpleMDM SCEP profile for the tart hosts → ronin_puppet host-injection._stagingcontainer stays empty until the staging pool exists.Validated:
terraform fmt/validateclean,bash -nclean.🤖 Generated with Claude Code