# yucca/tf

Terraform/OpenTofu authority for cluster identity, 1P secret items, and the
inventory artifacts Ansible consumes. Multi-partition / multi-region via
terragrunt.

## The partition / region model

Everything is keyed on a single first-class topology:

**partition → region → { exactly one K8s cluster, one-or-more Ceph clusters }**

- **Partition** = `prod` | `staging` | `dev` (formerly `env`).
- **Region** = a site: `htz-fsn1`, `austin`, `local` (formerly `site`/`datacenter`).
  Plus a reserved **`global`** pseudo-region for partition-wide stacks (DNS, the
  account-wide NetBird layer) — `global` is not a physical site, so its
  `role`/FQDN metadata is null.
- The human form is `partition@region` (`prod@htz-fsn1`); the canonical slug is
  `partition-region` (`prod-htz-fsn1`), which derives names on every surface.

Every stack sits at **three path segments**:
`deployment/<partition>/<region>/<stack>`. The account-wide prod layer is
`prod/global/netbird` (a stack under the `global` region), so there is no
two-segment special case.

## Layout

```
tf/
├── .env                              ← op:// references (committed; no literal secrets)
├── op-run.sh                         ← op-run wrapper used by the mise tf:* tasks
├── shared/
│   └── modules/
│       ├── ceph-cluster/             ← per-cluster ceph orchestration module
│       │   ├── main.tf, variables.tf, outputs.tf, rendering.tf
│       │   ├── wordlist.txt          ← 923 words for auto-picked hostnames
│       │   └── templates/
│       │       ├── inventory.ini.tftpl
│       │       ├── inventory-destroy.ini.tftpl
│       │       ├── inventory-provision-debian-live.ini.tftpl
│       │       └── secrets.yml.tpl.tftpl
│       └── talos-baremetal/         ← Talos on bare-metal nodes already in maintenance mode
│           ├── main.tf, variables.tf, outputs.tf
│           └── firewall.tf              ← Talos host ingress firewall (default-deny + allow-lists)
└── deployment/
    ├── terragrunt.hcl                ← root: state backend + partition/region/stack from path
    ├── staging/
    │   ├── austin/
    │   │   ├── region.hcl            ← role + FQDN parts for staging@austin
    │   │   ├── ceph/                 ← sietch ceph cluster (clusters.auto.tfvars)
    │   │   └── talos/                ← bare-metal Talos cluster (3× CP, Cilium CNI)
    │   └── global/
    │       ├── region.hcl            ← role=null (pseudo-region)
    │       ├── dns/                  ← Cloudflare records (futo.cloud)
    │       └── netbird/              ← NetBird Cloud access control (staging)
    ├── dev/
    │   ├── local/
    │   │   ├── region.hcl
    │   │   └── talos/                ← Talos VMs on the sietch hypervisors
    │   └── global/
    │       ├── region.hcl
    │       └── dns/
    └── prod/
        ├── htz-fsn1/
        │   ├── region.hcl           ← role + FQDN parts; site_id=40
        │   ├── mgmt-hosts.yaml      ← mgmt-host roster (region root; fabric + render read it)
        │   ├── fabric/              ← Junos switch fabric + NetBox + mgmt reprovision
        │   └── netbird/             ← htz-fsn1 site NetBird layer (routed htz-fsn1 network)
        └── global/
            ├── region.hcl
            ├── terragrunt.hcl       ← account-wide prod NetBird (two-segment region-root stack)
            └── netbird.tf
```

Add a region: create `deployment/<partition>/<region>/region.hcl` + stacks under
it. Add a stack: a new sibling dir under a region (`<region>/monitoring/` …).
NetBird Cloud access control lives in `staging/global/netbird/`, and for prod is
layered: `prod/global/` (account-wide) above per-region
`prod/<region>/netbird/` (e.g. `prod/htz-fsn1/netbird/`). See "The netbird-env
module" below.

The dns stack manages infrastructure names in the futo.cloud Cloudflare
zone (today: the Sietch RGW S3 endpoint + virtual-hosted wildcard).
Records are declarative in `records.auto.tfvars`; the API token resolves
from `op://yucca_tf_manual/CLOUDFLARE_API_TOKEN` via `tf/.env`.

The talos stack is documented in `ansible/talos/README.md` and
`ansible/talos/docs/runbooks/cluster-bring-up.md` (the TF + Ansible flow
is interleaved — TF renders the inventory Ansible consumes, then
bootstraps the VMs Ansible created).

## Conventions

### Partition, region, and stack are derived from the directory path

`deployment/terragrunt.hcl` parses the child's relative path:
`partition = segs[0]`, `region = segs[1]`, `stack = join(segs[2:])`, and
`slug = "<partition>-<region>"`.

```
deployment/staging/austin/ceph     → partition=staging, region=austin,   stack=ceph
deployment/staging/global/dns      → partition=staging, region=global,   stack=dns
deployment/prod/htz-fsn1/fabric    → partition=prod,    region=htz-fsn1, stack=fabric
deployment/prod/htz-fsn1/netbird   → partition=prod,    region=htz-fsn1, stack=netbird
deployment/prod/global/netbird     → partition=prod,    region=global,   stack=netbird
```

The state backend key is derived from these:
`yucca/${partition}/${region}/${stack}/terraform.tfstate` in the shared
`yucca-tf-state` S3 bucket. (The legacy `ceph/` project prefix is dropped —
talos/dns/netbird/fabric all share the bucket now.) Every stack is three
segments — the account-wide prod layer is `prod/global/netbird` (not a bare
`prod/global`), so `region.hcl` at `prod/global/` is found by
`find_in_parent_folders` from the stack dir, exactly like `staging/global`. The
`n==2` branch in `terragrunt.hcl` is now dead and can be removed.

### Per-region metadata + role (`region.hcl`)

Each region dir carries a `deployment/<partition>/<region>/region.hcl` holding
`role` (`primary` | `secondary`), `site_id`, `datacenter`, `provider_code`, and
`domain`. The root terragrunt finds it via
`find_in_parent_folders("region.hcl", "")` (with a not-found guard) and merges
its `locals` into every stack's inputs — so every stack in a region inherits the
metadata without per-tfvars duplication. `global` pseudo-regions set `role = null`
(and null FQDN parts). Each stack declares matching `variable` blocks with null
defaults.

`role` encodes the product invariant: when a partition spans multiple regions,
**yucca-api + the database run only in the `primary` region**; secondary regions
run the storage-local subset. It is authoritative here in TF state
(`discovery.role`) and consumed downstream (Flux role components, yuctl).

### The `op run --env-file=tf/.env --` pattern

`tf/.env` holds 1Password `op://` references — **not literal secrets**:

```sh
export OP_SERVICE_ACCOUNT_TOKEN="op://yucca_tf_dev/yucca_futo_1pass_superuser_service_account/password"
```

Wrap every terragrunt invocation with `op run --env-file=tf/.env --` (the
mise `tf:*` tasks do this automatically). The op CLI resolves the `op://`
reference and injects the actual token as `OP_SERVICE_ACCOUNT_TOKEN` into
the child process's environment. The 1P Terraform provider picks it up
from the env var and authenticates.

The same pattern is used in `immich-app/devtools` and is the Futo-wide
convention for TF secret injection.

### Committed `.env` is safe because it's just pointers

Yucca's root `.gitignore` normally excludes `.env` files — we add an
explicit `!tf/.env` exception. This file contains only `op://` URIs; no
secret ever transits the repo. It's a committed manifest of "which 1P
items this TF depends on."

### Stack override via `TF_STACK_DIR`

The default `mise run tf:*` tasks target `tf/deployment/staging/austin/ceph`.
Point them at another stack via the `TF_STACK_DIR` env var:

```bash
TF_STACK_DIR=tf/deployment/staging/austin/ceph  mise run tf:plan
TF_STACK_DIR=tf/deployment/staging/austin/talos mise run tf:apply
```

## Running TF

### One-shot (preferred for now)

```bash
mise run tf:init      # first time in a stack
mise run tf:plan      # dry run
mise run tf:apply     # render artifacts + (future) create 1P items
```

These wrap: `op run --env-file=tf/.env -- terragrunt --working-dir <stack> <cmd>`.

### In CI (staging stacks)

`.github/workflows/infra.yml` runs the staging stacks from GitHub Actions:

- **Plan** on every PR touching `tf/**`; **apply** on merge to `main`, gated
  behind the `staging-infra` Environment (required reviewers).
- Applies `staging/austin/talos` (cluster + Flux + secrets) then `staging/global/dns`.
- The Talos stack reaches the `10.10.10.0/24` nodes by joining the **tailnet**
  (`tailscale/github-action`, `--accept-routes`) — the cluster firewall already
  trusts the Tailscale CIDRs. The DNS stack is pure Cloudflare API, no tailnet.
- Secrets come from the same `op run --env-file=tf/.env` path; CI just supplies
  the per-env 1P service-account token (the rest resolves from 1P). The token is
  injected as `OP_SERVICE_ACCOUNT_TOKEN` from the environment-specific secret —
  `OP_TF_YUCCA_STAGING_ENV` here (dev/prod workflows use `OP_TF_YUCCA_DEV_ENV` /
  `OP_TF_YUCCA_PROD_ENV`) — replacing a shared superuser SA with a scoped one.

Prerequisites (out-of-band): repo secret `OP_TF_YUCCA_STAGING_ENV` — a **staging**
1P service account mirroring the dev/prod ones, i.e. granted `shared_tf`,
`shared_tf_staging`, `yucca_tf` (read) + `yucca_tf_staging` (read/write for the
JWT-keypair item). Note: a copy of the *dev* SA token won't work — it can't read
`yucca_tf_staging`. Also: `TS_OAUTH_CLIENT_ID`, `TS_OAUTH_SECRET`; a Tailscale
subnet router advertising `10.10.10.0/24` with `tag:project-yucca` approved for
it; and the `staging-infra` Environment with required reviewers.

### State backend

Remote: shared `yucca-tf-state` S3 bucket at OVH Paris
(`https://s3.eu-west-par.io.cloud.ovh.net/`). Key path:
`yucca/${partition}/${region}/${stack}/terraform.tfstate` (region-root stacks:
`yucca/${partition}/${region}/...`). All yucca stacks live under the `yucca/`
prefix in the shared bucket.

Credentials are AWS-compatible env vars (`AWS_ACCESS_KEY_ID` /
`AWS_SECRET_ACCESS_KEY`), injected via `op run --env-file=tf/.env` from
the `TF_STATE_S3_*` items in the `yucca_tf` vault. OVH-specific config
(skip AWS validation, path-style URLs) is in
`deployment/terragrunt.hcl`.

**State locking is not enabled.** OVH has no DynamoDB equivalent;
OpenTofu's `use_lockfile = true` option would handle single-bucket locking
but expects the lockfile object to already exist — `terragrunt init`
against a fresh backend fails with 404 before it can create one. Enable
it once the concern is concurrent applies (multiple operators working the
same stack simultaneously). Single operator today → low risk.

## Discovery outputs contract

Every stack emits a single non-sensitive top-level **`discovery`** output (plus
`discovery_schema_version`). It is the machine-readable description of the
topology that `yuctl` consumes — it reads the state object straight from S3 and
parses `.outputs.discovery.value`, so no checkout, init, or provider is needed.

**Secrets are always `op://` references, never values.** The in-stack sensitive
`kubeconfig`/`talosconfig` outputs stay for in-stack use; discovery only carries
the *reference* (`op://<vault>/<title>/password`).

Common **envelope** (every stack):

```
{
  schema_version, partition, region, slug, role, stack, stack_type,
  region_meta: { site_id, datacenter, provider_code, domain }
}
```

Per `stack_type` **payload**:

| stack_type | stacks | payload key + fields |
|---|---|---|
| `region-k8s` | `*/talos` | `kubernetes: { cluster_name, api_endpoint, operator_endpoint, cp_node_ips, kubeconfig_ref, talosconfig_ref }` |
| `ceph` | `*/ceph` | `ceph_clusters: { <name> => { cluster_name, fqdn, rgw_s3_endpoint, health_cred_ref, s3_admin_cred_refs, secret_item_titles, bootstrap_host } }` |
| `dns` | `*/dns` | `dns: { provider, zone, record_fqdns, api_token_ref }` |
| `netbird` | `*/netbird`, `prod/global` | `netbird: { name_prefix, vault, group_ids, policy_ids, network_ids, setup_key_item_titles }` |
| `fabric` | `prod/htz-fsn1/fabric` | `fabric: { site_id, kube_cidr, mgmt_cidr, cluster_cidrs }` |

The talos stacks persist their kube/talosconfig into 1Password
(`onepassword_item`, mirroring the JWT-keypair / netbird-setup-key pattern) so
the `*_ref` fields resolve — staging writes `YUCCA_STAGING_{KUBE,TALOS}CONFIG`;
dev writes `YUCCA_DEV_<CLUSTER>_{KUBE,TALOS}CONFIG`.

## Migrating an existing stack to the new layout

The dir moves + terragrunt rewrite change the **state key** (`ceph/<env>/...` →
`yucca/<partition>/<region>/...`), so a live stack's remote state must be
re-pointed — reversibly, no destroy/recreate. Per stack (single-operator window;
no state locking):

1. Pre-flight `terragrunt plan` on the OLD layout → confirm **no-op**; back up
   the old state object.
2. Land the terragrunt.hcl rewrite + dir moves + renames (no apply yet).
3. **Server-side S3 copy** old key → new `yucca/...` key (old object stays as a
   rollback anchor).
4. Delete the stale generated `backend.tf`; `terragrunt init` in the new dir
   (decline the state-copy prompt; `-reconfigure` if needed).
5. `terragrunt plan` → **must be no-op** (the gate; a non-empty plan = a
   rename/source-path mismatch, not a state problem — STOP + roll back).
6. `terragrunt output discovery` → confirm the contract resolves.
7. After **all** stacks are green, `aws s3 rm` the legacy `ceph/*` objects.

Order: staging first, then prod (`global` → region → fabric — `prod/global`
before `prod/htz-fsn1/netbird`, which has a real terragrunt `dependency` on it).
`dev` is dir-move only (no remote state). The NetBird plans must show **no
resource renames** — the rendered names are byte-identical across the rename.

## The ceph-cluster module

Declarative input in `clusters.auto.tfvars`:

```hcl
clusters = {
  sietch = {
    domain            = "staging.austin.int.futo.cloud"
    partition         = "staging"
    region            = "austin"
    provider_code     = "int"
    role_in_hostname  = "ceph"
    ansible_ssh_user  = "ansible-iac"
    ansible_ssh_key   = "~/.ssh/id_ed25519_sietch"
    vault             = "yucca_tf_staging"
    provision_profile = "debian-live"   # null for Hetzner-installimage clusters
    hosts = [
      { name = "laurel", bond_ip = "10.10.10.90", bootstrap = true },
      { name = "lawson", bond_ip = "10.10.10.91" },
      { name = "samara", bond_ip = "10.10.10.92" },
    ]
  }
}
```

On apply, the module:

1. Picks wordlist names for `hosts[].name == null` (stable across applies;
   seeded per-cluster; operator-declared names excluded from the pool to
   prevent collisions).
2. Renders `inventory.ini` (normal ops), `inventory-destroy.ini` (explicit
   destroy flag), `secrets.yml.tpl` (op:// references to
   `yucca_tf_staging/<CLUSTER>_CEPH_*_PASSWORD/password`). Optionally renders
   `inventory-provision.ini` when `provision_profile != null`.
3. **(Not yet TF-managed)** `onepassword_item` resources for cluster
   secrets are dormant — items are created via `op` CLI today and read
   by Ansible at play time. See `ansible/ceph/docs/secrets.md` for the
   re-enable plan.

## The talos-baremetal module (staging/austin/talos)

Brings up Talos on **bare-metal nodes already running in maintenance mode** at
known addresses — no Ansible, no hypervisors, no VLANs (the earlier VM-oriented
`talos-cluster` module was removed unused). It dials each node's maintenance IP, applies machine
config (which installs to disk + reboots), bootstraps one CP, then emits
kube/talosconfig and gates on cluster health.

Declarative input in `deployment/staging/austin/talos/clusters.auto.tfvars`:

```hcl
clusters = {
  yucca-staging = {
    talos_version      = "1.13.4"
    kubernetes_version = "v1.36.1"
    install_disk       = "/dev/sda"        # WIPED — the 240GB DELLBOSS; NVMe left raw
    cluster_vip        = "10.10.10.15"     # L2 VIP, etcd-elected across CPs
    gateway            = "10.10.10.1"
    subnet_cidr        = "10.10.10.0/24"
    cni                = "cilium"           # cni:none in Talos + Cilium via Helm
    disable_kube_proxy = true               # Cilium kube-proxy replacement (KubePrism)
    cilium_version     = "1.19.5"
    hubble             = true
    bond = { interfaces = ["eno1np0", "eno2np1"], mode = "active-backup" } # flip to 802.3ad after the switch is LACP'd
    nodes = [
      { name = "staging-cp1", address = "10.10.10.47" },
      { name = "staging-cp2", address = "10.10.10.242" },
      { name = "staging-cp3", address = "10.10.10.117" },
    ]
  }
}
```

Notes:

- **Static IP = maintenance IP.** Each node's `address` is pinned as the static
  IP on `bond0`, so TF stays reachable across the install reboot.
- **bond** comes up `active-backup` (no switch config needed). Migrate to
  `802.3ad` later, node-by-node, after converting the switch ports to LACP
  port-channels — LACP needs both ends configured at once, so a big-bang flip
  drops connectivity until both sides agree.
- **Ingress firewall** (`firewall.tf`): default-deny + per-service allow-lists
  scoped to the subnet (+ pod CIDR on kubelet). apid + apiserver also trust the
  Tailscale ranges (`trust_tailscale`). ⚠️ The host running `tf apply` must have
  a source IP inside an allowed range or apid (50000) is blocked and bootstrap
  hangs — add operator/jump subnets to `trusted_cidrs`.
- **CNI is installed in the same apply.** With `cni:none` the nodes are NotReady
  until Cilium lands, so the module's health gate runs `skip_kubernetes_checks`;
  `helm.tf` installs Cilium, then a second (full) health gate enforces Ready.
- **One cluster per stack.** The helm provider binds to a single cluster
  (`one(...)`); add more clusters in their own stack.

Run it (see "Running TF" below — needs 1Password unlocked + an on-LAN apply host):

```bash
TF_STACK_DIR=tf/deployment/staging/austin/talos mise run tf:init
TF_STACK_DIR=tf/deployment/staging/austin/talos mise run tf:plan
TF_STACK_DIR=tf/deployment/staging/austin/talos mise run tf:apply   # WIPES /dev/sda, installs Talos
```

## The netbird-env module (NetBird Cloud access control)

Manages one layer's [NetBird](https://netbird.io) Cloud footprint: **groups**,
**access policies**, **device auth (setup) keys**, and routed **networks**. One
NetBird Cloud account (`api.netbird.io`) backs everything — the module namespaces
every object `<name_prefix>_<key>` (all underscores) so all envs/sites coexist.

### Group model

Per env (and per prod site), the baseline groups are:

| group | who | rendered (staging / prod htz-fsn1) |
|---|---|---|
| `ci` | ephemeral CI runners | `yucca-staging-ci` / `yucca-prod-htz-fsn1-ci` |
| `mgmt` | management nodes (configured via Ansible; also the route peers) | `yucca-staging-mgmt` / … |
| `talos` | Talos cluster nodes | `yucca-staging-talos` / … |
| `k8s_operator` | in-cluster kubernetes operator | `yucca-staging-k8s-operator` / … |

Logical keys (the tfvars map keys, e.g. `ci`) stay lowercase; **rendered NetBird
names are UPPER_SNAKE** (uppercased, hyphens → underscores). CI is **per-env**
(`ci`, reaching only that env's groups) — no cross-env CI plane. `k8s` is split
into `talos` (the nodes) and `k8s_operator` (the operator identity) so they can
carry different policies.

### Stacks & layering

| stack | partition / scope | state key |
|---|---|---|
| `deployment/staging/global/netbird` | staging (global region) | `yucca/staging/global/netbird/…` |
| `deployment/prod/global/netbird` | prod, **account-wide** (cross-region) | `yucca/prod/global/netbird/…` |
| `deployment/prod/htz-fsn1/netbird` | prod, **region** htz-fsn1 | `yucca/prod/htz-fsn1/netbird/…` |

Staging is single-layer. **Prod is layered**: a `global` layer (reserved for
account-wide / cross-region groups + policies) above per-region layers. The
global layer is empty today — each region owns its own resource group and the
`yucca → resources` policy is module-generated per layer (see below). Region
groups are region-scoped (`yucca-prod-<region>-<role>`) so a network router's
peers are unambiguously *that region's* mgmt nodes. A region layer can still
consume a global group via a terragrunt `dependency` on `prod/global` → the
module's `external_groups` input, but none do today. The root terragrunt derives `stack` from the full sub-path,
so `prod/htz-fsn1/netbird` gets its own state key. (Now that the fabric stack
lives in its own `prod/htz-fsn1/fabric/` sub-stack, the region root carries no
terragrunt.hcl, so `prod/htz-fsn1/netbird` uses a normal
`find_in_parent_folders` include — the old direct-root-include workaround is
gone.) Rendered NetBird object names and 1P item titles are unchanged by the
rename (`YUCCA_STAGING_*`, `NETBIRD_YUCCA_PROD_HTZ_FSN1_*`): the `env`→`partition`
/ `site`→`region` swap keeps the same string values.

### The `yucca` → yucca-tags access model

`yucca` members reach everything tagged as a **yucca tag** (NetBird object names are
lowercase-kebab — e.g. `yucca-prod-htz-fsn1-mgmt`; the 1Password setup-key item
titles stay UPPER_SNAKE, since CI/ansible/talos read them by `op://` string):

- **`yucca`** — the existing **users** group (people). External (looked up by its
  actual name `yucca`); never managed here.
- **yucca tags** — any group flagged **`resource = true`** in a layer's `groups`.
  This marks the group **yucca-reachable**; it applies to **peer/node groups**
  (so a yucca member can SSH `yucca-prod-htz-fsn1-mgmt`, the mgmt nodes) as well
  as routed-subnet tags (`yucca-prod-htz-fsn1-resources`, which the site's
  `netbird_network_resource`s are tagged into). Today every group a layer owns is
  flagged.

For each layer that owns ≥1 yucca tag, the `netbird-env` module **auto-generates**
a `<prefix>-yucca-to-resources` policy (`bidirectional = false`) whose
destinations are *all* of that layer's flagged groups — so flagging a group grants
`yucca` users access to it (its peers and any tagged resources) with no policy to
edit. The source is `var.yucca_users_group` (default `yucca`, looked up by name;
set null to opt a layer out). `bidirectional = false` means yucca users only
*initiate* — this policy never makes a tagged group a source. The union of these
per-layer policies is the account-wide "yucca reaches every yucca tag we create"
guarantee.

> The former single shared **`yucca_resource`** tag in `prod/global` (one
> account-wide `yucca → yucca_resource` policy, consumed by sites via a terragrunt
> dependency) was **retired** in favour of this per-layer model — no cross-stack
> group reference, and the destination list is derived, not hand-maintained.

Staging additionally grants its `ci` group access to the existing **Liberty
Park** infra groups (where the staging nodes live today) — those are external
groups resolved by name in `staging/global/netbird/main.tf`.

### Declarative input (`netbird.auto.tfvars`)

Groups, setup keys, policies and networks reference groups by **logical key**,
never opaque NetBird IDs:

```hcl
# resource = true ⇒ yucca-reachable ("yucca tag"); here every group is flagged,
# so yucca users reach all of them (SSH the nodes + the routed subnets)
groups = { ci = { resource = true }, mgmt = { resource = true },
           talos = { resource = true }, k8s_operator = { resource = true },
           resources = { resource = true } }

setup_keys = {
  ci           = { type = "reusable", ephemeral = true, auto_groups = ["ci"] }
  mgmt         = { type = "reusable", auto_groups = ["mgmt"] }
  talos        = { type = "reusable", auto_groups = ["talos"] }
  k8s_operator = { type = "reusable", auto_groups = ["k8s_operator"] }
}

policies = {
  ci-to-all = {                       # CI reaches every node group in this env
    rules = [{ name = "ci-to-all", protocol = "all"
               sources = ["ci"], destinations = ["mgmt", "talos", "k8s_operator"] }]
  }
}
```

NetBird is **default-deny** — a peer gets only the access its groups' policies
grant; an empty `policies` map means total isolation. The `yucca →` resource
policy is *not* declared here: the module generates it from every group flagged
`resource = true` (see the access model above).

### Networks (prod htz-fsn1) — CIDRs propagated, not hardcoded

The htz-fsn1 site layer exposes a NetBird **Network** named `htz-fsn1`: the
`mgmt` group are the routing peers, and each routed subnet is a
`netbird_network_resource`. The **CIDRs are derived from the same
`fabric-addressing` module the fabric stack uses** (re-instantiated in the
layer's `addressing.tf` — a pure, stateless module, so no duplication and no
cross-stack coupling). Every resource is tagged into the site's own `resources`
group, so access is the module-generated `yucca-prod-htz-fsn1-yucca-to-resources`
policy. The only per-site input is the site id (the CIDRs flow from it):

```hcl
site_id = 40   # mirrors prod/htz-fsn1; feeds fabric-addressing → the routed CIDRs
               #   mgmt 10.40.5.0/24 · api 10.40.10.0/24
               #   cls1_public 10.40.20.0/23 · cls1_private 10.40.22.0/23
```

**Setup-key plaintext → 1Password.** Each setup key's secret `key` is written to
the per-env vault (`yucca_tf_<env>`) as item
`NETBIRD_<UPPERCASED_NAMESPACED_NAME>_SETUP_KEY` (`onepassword_item`, same "TF
mints secrets into 1P" pattern as the JWT keypair). The namespaced title keeps
multiple prod sites writing to the one `yucca_tf_prod` vault from colliding.

**Auth.** Two providers, both fed by `op run --env-file=tf/.env[.prod]`:

- `netbird` — admin PAT from `NB_PAT` (`op://shared_tf/NETBIRD_TF_PAT`, shared
  across all envs; `management_url` defaults to NetBird Cloud).
- `onepassword` — `OP_SERVICE_ACCOUNT_TOKEN` (same session), writes the keys.

Run it (pure cloud API — no tailnet, no node contact):

```bash
TF_STACK_DIR=tf/deployment/staging/global/netbird mise run tf:init   # then tf:plan / tf:apply
# prod — global layer first, then each region layer (uses the prod env file + SA):
OP_ENV_FILE=tf/.env.prod TF_STACK_DIR=tf/deployment/prod/global/netbird   mise run tf:apply
OP_ENV_FILE=tf/.env.prod TF_STACK_DIR=tf/deployment/prod/htz-fsn1/netbird mise run tf:apply
```

CI (`.github/workflows/infra.yml`) applies `staging/global/netbird` in the staging
matrix, and the prod layers (`prod/global` then `prod/htz-fsn1/netbird`) as gated
`prod-infra` jobs on the prod 1P SA / `tf/.env.prod`. Prod CI needs the
`OP_TF_YUCCA_PROD_ENV[_WRITE]` repo secrets + a `prod-infra` Environment — see
the workflow header.

### CI connects over NetBird

CI reaches the staging `10.10.10.0/24` nodes over the NetBird overlay (this
replaced the Tailscale subnet-router path). The `.github/actions/netbird-connect`
composite action installs the client and runs `netbird up` with the **`ci` setup
key** read from 1P (`op://yucca_tf_staging/NETBIRD_YUCCA_STAGING_CI_SETUP_KEY`);
the runner joins as a `ci` peer and the existing staging route advertises the LAN.
The apply job applies `staging/global/netbird` **first** (minting that key) before
connecting, so a fresh bootstrap is self-contained. The prod **fabric** workflow
(`fabric.yml`) still uses Tailscale — `10.40.5.0/24` isn't on NetBird yet.

## Where secrets actually live

- **`yucca_tf_dev`** (team-shared): live values consumed by Ansible at
  play time. Password items per cluster (ops, dashboard, grafana, S3
  svc-user access + secret), SSH Key items per cluster (ansible-iac
  keypairs), and DR-capture items per cluster (RGW TLS cert + key,
  client.admin keyring — populated by `mise run capture`).
- **`yucca_tf_dev_manual`** (team-shared): placeholders for
  human-fillable secrets (API tokens, OAuth client secrets). Not yet used
  by ceph-cluster.

Service accounts themselves are in `yucca_tf_dev` as two items:

| SA | Purpose | Consumed by |
|---|---|---|
| `yucca_futo_1pass_superuser_service_account` | Read + write all `yucca_tf_*` vaults | TF (via `tf/.env`) |
| `yucca_futo_1pass_service_account` | Read-only on `yucca_tf` and `yucca_tf_dev` | Ansible runtime / CI |

Both are shared with other Futo consumers (o11y, base Yucca infra).
Rotation affects all of them — see `ansible/ceph/docs/runbooks/rotate-sa-token.md`
for the coordination procedure.

## Adding a new cluster

1. Add an entry to `clusters.auto.tfvars`.
2. Create the 1P items in `yucca_tf_dev`:
   - Password items: `<CLUSTER>_CEPH_{OPS,DASHBOARD,GRAFANA}_PASSWORD`, plus
     `<CLUSTER>_CEPH_S3_SVC_YUCCA_RESTIC_{ACCESS,SECRET}_KEY`. Use
     `op item create --generate-password` for each.
   - SSH Key item: `<CLUSTER>_CEPH_ANSIBLE_IAC_SSH_KEY` via
     `op item create --category "SSH Key" --ssh-generate-key=ed25519`.
3. `mise run tf:apply` — renders inventory + secrets template.
4. Create per-node `host_vars/*.yml` files in the new inventory dir (hardware
   topology; not TF-rendered yet).
5. On operator workstation: `scripts/install-ssh-keys.sh <cluster>` to pull
   the private key from 1P.
6. After first successful deploy: `mise run capture` to snapshot the RGW
   TLS material + admin keyring to 1P for DR.
7. See [`ansible/ceph/docs/adding-a-cluster.md`](../ansible/ceph/docs/adding-a-cluster.md)
   for the full walk-through.

## Related

- TF-first + op inject model: `ansible/ceph/docs/secrets.md`
- Immich devtools (upstream pattern): <https://github.com/immich-app/devtools/tree/main/tf>