ansible(proxmox): route Ansible via pfSense NAT; decouple k3s node-ip from ansible_host; mount vault-pass into dev container

- inventory routes SSH via 192.168.2.102:2250/2251/2252; new k3s_node_ip carries
  each node's real 192.168.1.x for --node-ip / k3s_api_host / Cilium parity
- dev.sh bind-mounts ~/.config/home-k3s/ansible-vault-pass (ro) so vaulted
  playbooks can run in the pinned container (ansible.cfg vault_password_file)

Co-Authored-By: Claude Opus 4.8 <[email protected]>

infra/ansible/inventory/group_vars/all.yml

@@ -4,8 +4,10 @@
 # cloud-init created this login user (tofu var login_user); it has NOPASSWD sudo.
 ansible_user: k3s
 
-# The kube-apiserver endpoint the whole stack agrees on: the primary node IP.
-# Used for k3s --tls-san / secondary --server AND for Cilium k8sServiceHost so the
-# Ansible bootstrap and the Flux HelmRelease stay in PARITY (docs/02 contract).
-k3s_api_host: "{{ hostvars[groups['k3s_primary'][0]]['ansible_host'] }}"
+# The kube-apiserver endpoint the whole stack agrees on: the primary's REAL node IP.
+# NOTE: ansible_host is now the pfSense NAT SSH target (192.168.2.102:225x), NOT the node
+# IP — so we read the real 192.168.1.x from k3s_node_ip instead. Used for k3s --tls-san /
+# secondary --server AND for Cilium k8sServiceHost so the Ansible bootstrap and the Flux
+# HelmRelease stay in PARITY (docs/02 contract).
+k3s_api_host: "{{ hostvars[groups['k3s_primary'][0]]['k3s_node_ip'] }}"
 k3s_api_port: 6443

infra/ansible/inventory/hosts.ini

@@ -1,23 +1,26 @@
-# Static inventory — ALIGNED with infra/tofu defaults (Proxmox migration IPs).
-# Regenerate from tofu when IPs/names are overridden:
-#   cd ../tofu && tofu output -raw ansible_inventory > ../ansible/inventory/hosts.ini
+# Static inventory — k3s node IPs ALIGNED with infra/tofu defaults (Proxmox migration IPs),
+# but the SSH target is the pfSense NAT (see NAT HAND-OFF below) — this file is
+# HAND-MAINTAINED and must NOT be regenerated from `tofu output -raw ansible_inventory`.
 #
 # k3s_primary = the --cluster-init server (embedded-etcd founder + Cilium k8sServiceHost).
 # k3s_secondary = the two servers that join it. All three are servers (HA embedded etcd).
 #
-# NAT HAND-OFF (PM to finalize): the nodes now live on the Proxmox LAN at
-# 192.168.1.50/.51/.52. The PM reaches them over a pfSense NAT that is NOT yet created.
-# Once the NAT/port-forward rule exists, the `ansible_host` (and possibly
-# `ansible_port`) below may need to be the NAT-forwarded address:port instead of the
-# raw node IP — do NOT guess it here. If the control node has direct LAN reachability
-# to 192.168.1.0/24, the raw IPs below are correct as-is.
+# NAT HAND-OFF (LIVE): the nodes live on the Proxmox LAN at 192.168.1.50/.51/.52, and
+# Ansible reaches them over the pfSense NAT at 192.168.2.102, port-forwarded as
+# 2250 -> 192.168.1.50:22, 2251 -> 192.168.1.51:22, 2252 -> 192.168.1.52:22.
+# Therefore `ansible_host`/`ansible_port` below are the NAT SSH target (192.168.2.102:225x),
+# and each node's REAL 192.168.1.x lives in the `k3s_node_ip` var — consumed for the k3s
+# --node-ip, the API/tls-san endpoint (k3s_api_host), and general in-cluster parity.
+# This file is HAND-MAINTAINED for the NAT: do NOT blindly regenerate it from
+#   tofu output -raw ansible_inventory
+# because tofu has no knowledge of the pfSense NAT and would overwrite the mapping below.
 
 [k3s_primary]
-k3s-dev-1 ansible_host=192.168.1.50
+k3s-dev-1 ansible_host=192.168.2.102 ansible_port=2250 k3s_node_ip=192.168.1.50
 
 [k3s_secondary]
-k3s-dev-2 ansible_host=192.168.1.51
-k3s-dev-3 ansible_host=192.168.1.52
+k3s-dev-2 ansible_host=192.168.2.102 ansible_port=2251 k3s_node_ip=192.168.1.51
+k3s-dev-3 ansible_host=192.168.2.102 ansible_port=2252 k3s_node_ip=192.168.1.52
 
 [k3s_servers:children]
 k3s_primary

infra/ansible/roles/k3s_server/tasks/main.yml

@@ -9,6 +9,8 @@
     dest: "{{ k3s_install_script }}"
     mode: "0755"
 
+# --node-ip uses k3s_node_ip (the real 192.168.1.x), NOT ansible_host — the latter is
+# now the pfSense NAT SSH target (192.168.2.102:225x) and must not be advertised to k3s.
 - name: Compose the common k3s server flags
   ansible.builtin.set_fact:
     k3s_common_args: >-
@@ -19,7 +21,7 @@
       --disable={{ k3s_disable }}
       --write-kubeconfig-mode=644
       --tls-san={{ k3s_api_host }}
-      --node-ip={{ ansible_host }}
+      --node-ip={{ k3s_node_ip }}
 
 # --- primary: found the cluster --------------------------------------------
 - name: Install k3s primary (cluster-init, embedded etcd)

infra/devcontainer/dev.sh

@@ -43,6 +43,7 @@ run() {
     -v "${REPO_ROOT}:/work" -w /work \
     -v "${HOME}/.ssh:/root/.ssh:ro" \
     -v "${HOME}/.config/sops:/root/.config/sops" \
+    -v "${HOME}/.config/home-k3s/ansible-vault-pass:/root/.config/home-k3s/ansible-vault-pass:ro" \
     -e LIBVIRT_DEFAULT_URI=qemu:///system \
     -e KUBECONFIG="${DEV_KUBECONFIG:-/work/infra/ansible/.cache/dev.kubeconfig}" \
     "$IMAGE" "$@"