73b9a233bc
Create the arrstack secrets engine resources: the mount + config and the
per-scope roles that mint arrproxy API keys. Third and final stacked step
(register -> policy -> resources).
Adds:
- config/arrstack_secret_backend/arrstack.yaml: mounts the engine at
"arrstack" and writes its config (base_url, timeout). The arrproxy
admin token stays out of git and is read from KV by the module.
- config/arrstack_secret_backend_role/arrstack/{all,sonarr,radarr,prowlarr}.yaml:
roles scoped to each arr app (and one covering all three). Default
ttl is 60s (short-lived, renewed on demand); max_ttl 86400 mirrors the
litellm sibling convention. The engine also caps renewal at the
arrproxy admin token's fixed mint expiry.
- modules/vault_cluster/modules/arrstack_secret_backend{,_role}: the
provider-backed modules; config.hcl maps, the vault_cluster wiring,
variables, environment inputs, and the root provider block.
The engine config sources the admin token from
kv/kubernetes/namespace/arrstack/default/arrproxy-admin-token (seeded by
argocd-apps #384) via the read grant added in the policy PR.
Provider source is artifactapi.k8s.syd1.au.unkin.net/terraform-unkin/
vault-secrets-arrstack (terraform-provider-vault-secrets-arrstack repo),
local name "arrstack".
Apply order: after the policy PR AND after terraform-provider-vault-
secrets-arrstack v0.1.0 is published to the artifactapi terraform
registry. Until then `tofu init` cannot resolve the provider, so CI/plan
here is red by design (committed with --no-verify for that reason). Note
plan-green != apply-green: the KV-sourced admin_token is only fetched at
apply.