From 7f4e79a7e23b652b12024fb6e93162e8db571d19 Mon Sep 17 00:00:00 2001
From: Ben Vincent <ben@unkin.net>
Date: Wed, 15 Jul 2026 21:29:58 +1000
Subject: [PATCH] Add auth and state access for terraform-rancher

Mirrors the terraform-authentik runner setup (#78/#81/#82) for the new
terraform-rancher repo, which manages Rancher's Authentik OIDC auth via the
rancher2 provider.

- AppRole terraform_rancher + k8s auth role woodpecker_terraform_rancher.
- Consul secret backend role + ACL policy granting write to the
  infra/terraform/rancher/ state prefix.
- Vault policies: read the Rancher admin API token
  (kv/service/terraform/rancher) and the keycloakoidc client secret
  (kv/kubernetes/namespace/cattle-system/default/oauth-credentials), plus the
  consul_root state creds.
---
 .../approle/terraform_rancher.yaml             |  9 +++++++++
 .../au/syd1/woodpecker_terraform_rancher.yaml  |  7 +++++++
 .../consul_root/au/syd1/terraform-rancher.yaml |  5 +++++
 .../au/syd1/creds/terraform-rancher.yaml       | 11 +++++++++++
 policies/kv/service/terraform/rancher.yaml     | 18 ++++++++++++++++++
 .../consul_root/au/syd1/terraform-rancher.hcl  |  7 +++++++
 6 files changed, 57 insertions(+)
 create mode 100644 config/auth_approle_role/approle/terraform_rancher.yaml
 create mode 100644 config/auth_kubernetes_role/k8s/au/syd1/woodpecker_terraform_rancher.yaml
 create mode 100644 config/consul_secret_backend_role/consul_root/au/syd1/terraform-rancher.yaml
 create mode 100644 policies/consul_root/au/syd1/creds/terraform-rancher.yaml
 create mode 100644 policies/kv/service/terraform/rancher.yaml
 create mode 100644 resources/secret_backend/consul_root/au/syd1/terraform-rancher.hcl

diff --git a/config/auth_approle_role/approle/terraform_rancher.yaml b/config/auth_approle_role/approle/terraform_rancher.yaml
new file mode 100644
index 0000000..cec109a
--- /dev/null
+++ b/config/auth_approle_role/approle/terraform_rancher.yaml
@@ -0,0 +1,9 @@
+token_ttl: 120
+token_max_ttl: 120
+bind_secret_id: false
+token_bound_cidrs:
+  - "10.10.12.200/32"
+  - "198.18.25.102/32"
+  - "198.18.26.91/32"
+  - "198.18.27.40/32"
+use_deterministic_role_id: true
diff --git a/config/auth_kubernetes_role/k8s/au/syd1/woodpecker_terraform_rancher.yaml b/config/auth_kubernetes_role/k8s/au/syd1/woodpecker_terraform_rancher.yaml
new file mode 100644
index 0000000..c01a017
--- /dev/null
+++ b/config/auth_kubernetes_role/k8s/au/syd1/woodpecker_terraform_rancher.yaml
@@ -0,0 +1,7 @@
+bound_service_account_names:
+  - terraform-rancher
+bound_service_account_namespaces:
+  - woodpecker
+token_ttl: 600
+token_max_ttl: 600
+audience: https://kubernetes.default.svc.cluster.local
diff --git a/config/consul_secret_backend_role/consul_root/au/syd1/terraform-rancher.yaml b/config/consul_secret_backend_role/consul_root/au/syd1/terraform-rancher.yaml
new file mode 100644
index 0000000..1749b55
--- /dev/null
+++ b/config/consul_secret_backend_role/consul_root/au/syd1/terraform-rancher.yaml
@@ -0,0 +1,5 @@
+consul_roles:
+  - terraform-rancher
+ttl: 120
+max_ttl: 300
+datacenters: []
diff --git a/policies/consul_root/au/syd1/creds/terraform-rancher.yaml b/policies/consul_root/au/syd1/creds/terraform-rancher.yaml
new file mode 100644
index 0000000..96f6544
--- /dev/null
+++ b/policies/consul_root/au/syd1/creds/terraform-rancher.yaml
@@ -0,0 +1,11 @@
+---
+rules:
+  - path: "consul_root/au/syd1/creds/terraform-rancher"
+    capabilities:
+      - read
+
+auth:
+  approle:
+    - terraform_rancher
+  k8s/au/syd1:
+    - woodpecker_terraform_rancher
diff --git a/policies/kv/service/terraform/rancher.yaml b/policies/kv/service/terraform/rancher.yaml
new file mode 100644
index 0000000..30352ab
--- /dev/null
+++ b/policies/kv/service/terraform/rancher.yaml
@@ -0,0 +1,18 @@
+# Allow the Terraform Rancher runner to read:
+#  - its own Rancher admin API token (rancher2 provider auth), and
+#  - the OAuth2/OIDC client secret backing the Rancher keycloakoidc AuthConfig
+#    (same secret Authentik sets on the provider).
+---
+rules:
+  - path: "kv/data/service/terraform/rancher"
+    capabilities:
+      - read
+  - path: "kv/data/kubernetes/namespace/cattle-system/default/oauth-credentials"
+    capabilities:
+      - read
+
+auth:
+  approle:
+    - terraform_rancher
+  k8s/au/syd1:
+    - woodpecker_terraform_rancher
diff --git a/resources/secret_backend/consul_root/au/syd1/terraform-rancher.hcl b/resources/secret_backend/consul_root/au/syd1/terraform-rancher.hcl
new file mode 100644
index 0000000..5b9bdbb
--- /dev/null
+++ b/resources/secret_backend/consul_root/au/syd1/terraform-rancher.hcl
@@ -0,0 +1,7 @@
+key_prefix "infra/terraform/rancher/" {
+  policy = "write"
+}
+
+session_prefix "" {
+  policy = "write"
+}
-- 
2.47.3