Add Atlas media and storage services [Phase 1] (#9)

* Add Atlas media and storage services

* Document Atlas backend phase one and WireGuard deployment

* Enable Atlas NAS management and document bootstrap workflow

* Harden Atlas network, SSH, firewall, and sharing

* Rotate Ansible Vault secrets

* Allow configurable Aegis SSH users and authorized keys

* Manage Aegis SSH authorized key fragments

* Manage SSH authorized key fragments for infrastructure hosts

* Harden Rocky storage and sharing configuration

* Verify WireGuard handshakes and restore Podman networking

ansible/roles/profile_atlas/tasks/account.yml

@@ -6,9 +6,11 @@
       - atlas_admin_username != 'CHANGEME_ATLAS_ADMIN'
       - (atlas_admin_ssh_keys | default([])) | length > 0
       - atlas_admin_password_hash not in ['', '!', '*']
+      - atlas_ssh_allow_tcp_forwarding in ['no', 'yes', 'local', 'remote', 'all']
+      - "'wheel' not in atlas_immich_supplementary_groups"
     fail_msg: >-
-      Define atlas_admin_username, vault_atlas_authorized_ssh_keys and
-      vault_atlas_admin_password_hash before applying the Atlas profile.
+      Define atlas_admin_username, atlas_admin_ssh_keys and vault_atlas_admin_password_hash
+      before applying the Atlas profile.
   no_log: true
 
 - name: Create Atlas administrator group
@@ -31,6 +33,41 @@
     state: present
   no_log: true
 
+- name: Create Immich primary group
+  tags: [atlas, accounts, containers, immich]
+  ansible.builtin.group:
+    name: "{{ atlas_immich_group }}"
+    gid: "{{ atlas_immich_gid }}"
+    state: present
+
+- name: Ensure Immich hardware-access groups exist
+  tags: [atlas, accounts, containers, immich]
+  ansible.builtin.group:
+    name: "{{ item }}"
+    state: present
+  loop: "{{ atlas_immich_supplementary_groups }}"
+  loop_control:
+    label: "{{ item }}"
+
+- name: Create unprivileged Immich account
+  tags: [atlas, accounts, containers, immich]
+  ansible.builtin.user:
+    name: "{{ atlas_immich_username }}"
+    uid: "{{ atlas_immich_uid }}"
+    group: "{{ atlas_immich_group }}"
+    groups: "{{ atlas_immich_supplementary_groups }}"
+    append: false
+    home: /nonexistent
+    create_home: false
+    shell: /sbin/nologin
+    system: true
+    state: present
+
+- name: Read Immich hardware-access group IDs
+  tags: [atlas, accounts, containers, immich]
+  ansible.builtin.getent:
+    database: group
+
 - name: Grant Atlas administrator passwordless sudo
   tags: [atlas, services]
   ansible.builtin.copy:
@@ -41,13 +78,26 @@
     mode: "0440"
     validate: "visudo -cf %s"
 
-- name: Manage Atlas administrator authorized SSH keys exclusively
+- name: Ensure Atlas administrator SSH authorized key fragments directory exists
   tags: [atlas, services]
-  ansible.posix.authorized_key:
-    user: "{{ atlas_admin_username }}"
-    key: "{{ atlas_admin_ssh_keys | join('\n') }}"
-    state: present
-    exclusive: true
+  ansible.builtin.file:
+    path: "{{ atlas_admin_ssh_key_directory }}"
+    state: directory
+    owner: "{{ atlas_admin_username }}"
+    group: "{{ atlas_admin_group }}"
+    mode: "0700"
+
+- name: Manage Atlas administrator SSH authorized key fragments
+  tags: [atlas, services]
+  ansible.builtin.copy:
+    content: "{{ item.key }}\n"
+    dest: "{{ atlas_admin_ssh_key_directory }}/{{ item.name }}"
+    owner: "{{ atlas_admin_username }}"
+    group: "{{ atlas_admin_group }}"
+    mode: "0600"
+  loop: "{{ atlas_admin_ssh_keys }}"
+  loop_control:
+    label: "{{ item.name }}"
 
 - name: Check whether the Atlas SSH host key exists
   tags: [atlas, services]
@@ -113,6 +163,18 @@
       - "'pubkeyauthentication yes' in atlas_sshd_effective_configuration.stdout_lines"
       - "'passwordauthentication no' in atlas_sshd_effective_configuration.stdout_lines"
       - "'kbdinteractiveauthentication no' in atlas_sshd_effective_configuration.stdout_lines"
+      - "'authenticationmethods publickey' in atlas_sshd_effective_configuration.stdout_lines"
+      - "'x11forwarding no' in atlas_sshd_effective_configuration.stdout_lines"
+      - "('allowtcpforwarding ' ~ atlas_ssh_allow_tcp_forwarding) in atlas_sshd_effective_configuration.stdout_lines"
+      - "'allowagentforwarding no' in atlas_sshd_effective_configuration.stdout_lines"
+      - "'gatewayports no' in atlas_sshd_effective_configuration.stdout_lines"
+      - "'permittunnel no' in atlas_sshd_effective_configuration.stdout_lines"
+      - "'permituserenvironment no' in atlas_sshd_effective_configuration.stdout_lines"
+      - "'maxauthtries 3' in atlas_sshd_effective_configuration.stdout_lines"
+      - "'logingracetime 30' in atlas_sshd_effective_configuration.stdout_lines"
+      - "'clientaliveinterval 300' in atlas_sshd_effective_configuration.stdout_lines"
+      - "'clientalivecountmax 2' in atlas_sshd_effective_configuration.stdout_lines"
+      - "'loglevel VERBOSE' in atlas_sshd_effective_configuration.stdout_lines"
       - "('allowusers ' ~ atlas_admin_username) in atlas_sshd_effective_configuration.stdout_lines"
     fail_msg: The effective Atlas SSH configuration does not match the required hardening.
   when: not ansible_check_mode