From 6aa7cae7161e6ac83274c40b1da6984a21fdb08d Mon Sep 17 00:00:00 2001
From: Sven Velt <sven@velt.de>
Date: Wed, 2 Dec 2020 22:18:36 +0100
Subject: [PATCH] Add busybox' ntpd as timesync server (e.g. Alpine)

---
 roles/timesync-enabled/tasks/main.yml         |  2 +-
 .../tasks/timesync_busybox-ntp.yml            | 25 +++++++++++++++++++
 .../templates/etc/busybox-ntp.conf.j2         |  9 +++++++
 3 files changed, 35 insertions(+), 1 deletion(-)
 create mode 100644 roles/timesync-enabled/tasks/timesync_busybox-ntp.yml
 create mode 100644 roles/timesync-enabled/templates/etc/busybox-ntp.conf.j2

diff --git a/roles/timesync-enabled/tasks/main.yml b/roles/timesync-enabled/tasks/main.yml
index fb20446..887be1a 100644
--- a/roles/timesync-enabled/tasks/main.yml
+++ b/roles/timesync-enabled/tasks/main.yml
@@ -2,7 +2,7 @@
 - name: Check selected  timesync daemon
   fail:
     fail_msg: "{{ timesync_daemon|default('No daemon') }} not supported"
-  when: timesync_daemon not in [ "chrony", "ntp", "timesyncd" ]
+  when: timesync_daemon not in [ "busybox-ntp", "chrony", "ntp", "timesyncd" ]
 
 
 - name: Include each network variables if there is no host variable
diff --git a/roles/timesync-enabled/tasks/timesync_busybox-ntp.yml b/roles/timesync-enabled/tasks/timesync_busybox-ntp.yml
new file mode 100644
index 0000000..46edd17
--- /dev/null
+++ b/roles/timesync-enabled/tasks/timesync_busybox-ntp.yml
@@ -0,0 +1,25 @@
+---
+- name: Template ntp.conf
+  template:
+    src: etc/busybox-ntp.conf.j2
+    dest: /etc/ntp.conf
+    owner: root
+    group: root
+    mode: 0644
+    backup: yes
+  notify: Restart NTP
+
+
+- name: Remove server from command line
+  replace:
+    path: /etc/conf.d/ntpd
+    regexp: '\s?-p\s*[^ "]+'
+    replace: ''
+
+
+- name: Enable NTP daemon
+  service:
+    name: '{{ ntp_service_name }}'
+    enabled: True
+
+
diff --git a/roles/timesync-enabled/templates/etc/busybox-ntp.conf.j2 b/roles/timesync-enabled/templates/etc/busybox-ntp.conf.j2
new file mode 100644
index 0000000..d35b9ec
--- /dev/null
+++ b/roles/timesync-enabled/templates/etc/busybox-ntp.conf.j2
@@ -0,0 +1,9 @@
+### {{ ansible_managed }}
+
+# /etc/ntp.conf for Busybox ntpd
+
+{% for server in timesync_pools|default([]) %}server {{ server }}
+{% endfor %}
+{% for server in timesync_servers|default([]) %}server {{ server }}
+{% endfor %}
+