fix(time-sync): keep the internet VPS hosts on NTP

common and plays/configure-vm-time-sync.yml masked systemd-timesyncd on
every KVM guest, assuming a Proxmox host supplies the time. The Proxmox
VMs are gone; the only KVM guests left are the Hetzner/netcup VPS hosts,
which have no such host. netbird.renner.uno ran with no NTP client since
provisioning, drifted behind authentik, and NetBird management rejected
SSO tokens with "token used before issued".

Drop both masking paths and add a timesyncd role to the netbird server
and proxy plays; it unmasks, enables and starts systemd-timesyncd and
waits for NTPSynchronized=yes.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

ansible/plays/configure-vm-time-sync.yml

@@ -1,70 +0,0 @@
----
-# Configure VMs to use host time sync via kvm-clock
-# Disables systemd-timesyncd to prevent NTP conflicts
-#
-# VMs get time from Proxmox host via kvm-clock paravirtualized clock
-# This is more accurate and reliable than network NTP for VMs
-
-- name: Configure VM time synchronization from host
-  hosts: all
-  become: yes
-  gather_facts: yes
-
-  tasks:
-    - name: Check if running as VM (not LXC)
-      stat:
-        path: /sys/devices/system/clocksource/clocksource0/current_clocksource
-      register: clocksource_file
-
-    - name: Get current clock source
-      slurp:
-        src: /sys/devices/system/clocksource/clocksource0/current_clocksource
-      register: clocksource
-      when: clocksource_file.stat.exists
-
-    - name: Display clock source
-      debug:
-        msg: "Clock source: {{ (clocksource.content | b64decode | trim) if clocksource_file.stat.exists else 'N/A (LXC)' }}"
-
-    - name: Check if systemd-timesyncd is installed
-      command: systemctl list-unit-files systemd-timesyncd.service
-      register: timesyncd_installed
-      check_mode: false
-      failed_when: false
-      changed_when: false
-
-    - name: Stop and disable systemd-timesyncd on VMs using kvm-clock
-      systemd:
-        name: systemd-timesyncd
-        state: stopped
-        enabled: no
-      when:
-        - clocksource_file.stat.exists
-        - clocksource.content is defined
-        - "'kvm-clock' in (clocksource.content | b64decode)"
-        - "'systemd-timesyncd.service' in timesyncd_installed.stdout"
-
-    - name: Mask systemd-timesyncd to prevent re-enabling
-      systemd:
-        name: systemd-timesyncd
-        masked: yes
-      when:
-        - clocksource_file.stat.exists
-        - clocksource.content is defined
-        - "'kvm-clock' in (clocksource.content | b64decode)"
-        - "'systemd-timesyncd.service' in timesyncd_installed.stdout"
-
-    - name: Verify time sync status
-      command: timedatectl show --property=NTPSynchronized
-      register: timesync_status
-      check_mode: false
-      changed_when: false
-      failed_when: false
-
-    - name: Display final status
-      debug:
-        msg: |
-          Host: {{ inventory_hostname }}
-          Type: {{ 'VM (kvm-clock)' if (clocksource_file.stat.exists and 'kvm-clock' in (clocksource.content | b64decode | default(''))) else 'LXC/Other' }}
-          Time sync: {{ timesync_status.stdout | default('unknown') }}
-          Note: VMs sync time from Proxmox host, LXCs inherit host time automatically

ansible/plays/install-netbird-proxy.yml

@@ -22,6 +22,7 @@
   become: true
   roles:
     - common
+    - timesyncd
     - docker-install
     - netbird-proxy
     - netbird-proxy-watchdog

ansible/plays/install-netbird-server.yml

@@ -16,5 +16,6 @@
   become: true
   roles:
     - common
+    - timesyncd
     - docker-install
     - netbird-server

ansible/roles/common/tasks/main.yml

@@ -54,18 +54,9 @@
 # via plays/configure-ssh-ca.yml.
 
 # -------------------------------------------------------
-# 5. Disable NTP on VMs/LXC (use host time)
+# 5. Time sync
 # -------------------------------------------------------
-- name: Stop and disable systemd-timesyncd on VMs/LXC
-  systemd:
-    name: systemd-timesyncd
-    state: stopped
-    enabled: no
-    masked: yes
-  when:
-    - ansible_facts['virtualization_role'] == 'guest'
-    - ansible_facts['virtualization_type'] in ['kvm', 'lxc']
-  ignore_errors: yes
+# Moved to separate roles: timesyncd (internet VPS), chrony-ntp-server (edge).
 
 # -------------------------------------------------------
 # 6. Certificates

ansible/roles/timesyncd/tasks/main.yml

@@ -0,0 +1,26 @@
+---
+# Keep the system clock on NTP with systemd-timesyncd, on hosts that run no
+# chrony. A KVM guest's clocksource does not steer wall-clock time; without an
+# NTP client the clock drifts until JWT iat/exp checks fail.
+
+- name: Install systemd-timesyncd
+  ansible.builtin.apt:
+    name: systemd-timesyncd
+    state: present
+  when: ansible_facts['os_family'] == 'Debian'
+
+- name: Run systemd-timesyncd
+  ansible.builtin.systemd_service:
+    name: systemd-timesyncd
+    masked: false
+    enabled: true
+    state: started
+
+- name: Wait for the clock to synchronize
+  ansible.builtin.command:
+    argv: [timedatectl, show, --property=NTPSynchronized, --value]
+  register: timesyncd_synchronized
+  changed_when: false
+  until: timesyncd_synchronized.stdout == "yes"
+  retries: 12
+  delay: 5

ansible/site.yml

@@ -12,8 +12,6 @@
   ansible.builtin.import_playbook: plays/configure-synology-python.yml
 - name: Base system
   ansible.builtin.import_playbook: plays/common.yml
-- name: VM time sync
-  ansible.builtin.import_playbook: plays/configure-vm-time-sync.yml
 
 - name: SSH user CA
   ansible.builtin.import_playbook: plays/configure-ssh-ca.yml