Add a script to configure NTP client

scripts/ntp-client.rsc

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+# List of public servers... https://gist.github.com/mutin-sa/eea1c396b1e610a2da1e5550d94b0453
+
+# variables
+# timezone
+:local tz
+:set tz "+05:30"
+
+# To be used as the primary NTP server
+:local ipNTP
+:local ipNTPcomment
+# IP based NTP server - when DNS is unavailable.
+:set ipNTP "128.138.140.44"
+:set ipNTPcomment "From https://tf.nist.gov/tf-cgi/servers.cgi"
+
+# To be used as the secondary NTP server
+:local poolNTPorg
+:set poolNTPorg [:resolve pool.ntp.org]
+
+# To be used for DNS based NTP servers
+:local ntp1
+:local ntp2
+:set ntp1 "time.cloudflare.com"
+:set ntp2 "time.google.com"
+
+:put "Primary NTP: $ipNTP ($ipNTPcomment)"
+:put "Secondary NTP: $poolNTPorg (pool.ntp.org)"
+:put "DNS NTP 1: $ntp1"
+:put "DNS NTP 2: $ntp2"
+
+# configure timezone
+# /system clock manual set time-zone=$tz
+:put "Timezone: $tz\n"
+:put "Clock info..."
+
+/system clock print
+
+# Find Router OS version
+
+:local rosVersion
+:set rosVersion [:tonum [:pick [/system resource get version] 0 1]]
+# following works as well.
+# :set rosVersion [:pick [/system/routerboard/get current-firmware] 0 1]
+
+:put "\nRouter OS Version: $rosVersion\n"
+
+
+if ( $rosVersion = 7 ) do={
+    :put "Code for ROSv7 executed."
+    /system ntp client servers
+        add address=128.138.140.44 comment="NIST.gov"
+        add address=[ :resolve pool.ntp.org ] comment="pool.ntp.org"
+        add address=time.google.com
+        add address=time.cloudflare.com
+} else={
+    :put "Code for ROSv6 executed."
+    /system ntp client
+        set primary-ntp=128.138.140.44
+        set secondary-ntp=[ :resolve pool.ntp.org ]
+        set server-dns-names=time.cloudflare.com,time.google.com
+}
+
+/system ntp client set enabled=yes
+
+
+:put "NTP client info..."
+/system ntp client print