Install `systemd-timesyncd` and add its config file:

```
--- a/cookbooks/base/default.rb
+++ b/cookbooks/base/default.rb
@@ -80,6 +80,20 @@
 when "20.04", "22.04"
   service 'multipath-tools' do
     action :nothing
   end
+
+  package 'systemd-timesyncd'
+
+  service 'systemd-timesyncd' do
+    action :enable
+  end
+
+  remote_file '/etc/systemd/timesyncd.conf' do
+    owner 'root'
+    group 'root'
+    mode '0644'
+
+    notifies :restart, 'service[systemd-timesyncd]'
+  end
 end
```

cookbooks/base/default.rb

@@ -80,6 +80,20 @@ when "20.04", "22.04"
   service 'multipath-tools' do
     action :nothing
   end
+
+  package 'systemd-timesyncd'
+
+  service 'systemd-timesyncd' do
+    action :enable
+  end
+
+  remote_file '/etc/systemd/timesyncd.conf' do
+    owner 'root'
+    group 'root'
+    mode '0644'
+
+    notifies :restart, 'service[systemd-timesyncd]'
+  end
 end
 
 # AWS EC2 Swap Setting:

cookbooks/base/files/etc/systemd/timesyncd.conf

@@ -0,0 +1,19 @@
+#  This file is part of systemd.
+#
+#  systemd is free software; you can redistribute it and/or modify it
+#  under the terms of the GNU Lesser General Public License as published by
+#  the Free Software Foundation; either version 2.1 of the License, or
+#  (at your option) any later version.
+#
+# Entries in this file show the compile time defaults.
+# You can change settings by editing this file.
+# Defaults can be restored by simply deleting this file.
+#
+# See timesyncd.conf(5) for details.
+
+[Time]
+NTP=192.168.10.1
+#FallbackNTP=ntp.ubuntu.com
+#RootDistanceMaxSec=5
+#PollIntervalMinSec=32
+#PollIntervalMaxSec=2048