NTP Not Enabled according to TimeDateCTL - CentOS 7

Question

I'm wondering how I can get timedatectl to show that NTP is enabled in CentOS 7

root@voip:~ $ timedatectl
      Local time: Tue 2016-10-18 20:58:23 EDT
  Universal time: Wed 2016-10-19 00:58:23 UTC
        RTC time: Wed 2016-10-19 00:58:23
       Time zone: America/New_York (EDT, -0400)
     NTP enabled: no ##THIS LINE##
NTP synchronized: yes
 RTC in local TZ: no
      DST active: yes
 Last DST change: DST began at
                  Sun 2016-03-13 01:59:59 EST
                  Sun 2016-03-13 03:00:00 EDT
 Next DST change: DST ends (the clock jumps one hour backwards) at
                  Sun 2016-11-06 01:59:59 EDT
                  Sun 2016-11-06 01:00:00 EST

score 6 · Accepted Answer · answered Oct 19 '16 at 00:59

6

Well, its because of Chrony. (RHEL 7 new NTP Server)

First

yum remove chrony

Then

timedatectl set-ntp true

Not sure what effect this has other then making me happy with timedatectl, everything else said it was working, but I have an XYMon script for NTP which greps that line. Suppose thats the point of the script, it was red because it was telling me something was wrong!

answered Oct 19 '16 at 00:59

FreeSoftwareServers

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Thanks! This worked for me. A downstream NTP client was reporting that it was getting no NTP input, and this helped track it down. – Jason Oct 15 '17 at 02:02
It seems weird to me that you remove the NTP client and then NTP starts working. – Bratchley Apr 18 '20 at 19:34

score 5 · Answer 2 · edited Feb 07 '19 at 17:12

5

On CentOS 7.3.1611, I faced the same problem but had to do the reverse:

$ sudo yum install chrony
$ sudo timedatectl set-ntp true

edited Feb 07 '19 at 17:12

Community

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answered Aug 30 '18 at 10:04

pdp

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score 3 · Answer 3 · answered Sep 21 '19 at 10:23

timedatectl set-ntp true

needs a (secure) ntp client to synchronize time via systemd.

systemd from v213 supports "systemd-timesyncd" but in latest version of systemd on CentOS 7, they have decided to disable it. I am current on 7.7.1908 and systemd-timesyncd does not exist.

That means two things:

If your distro supports systemd-timesyncd, you can disable chrony and enable systemd-timesyncd
If it does not, you should install a (secure) ntp client (like chrony but there are also other options).

Only then you can indeed set ntp true in timedatectl.

NTP Not Enabled according to TimeDateCTL - CentOS 7

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