Re: synchronize time

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On 2012/02/29 06:33, Aaron Konstam wrote:
On Tue, 2012-02-28 at 14:10 -0800, jdow wrote:
On 2012/02/28 07:38, Aaron Konstam wrote:
On Mon, 2012-02-27 at 18:06 -0800, Marvin Kosmal wrote:


On Mon, Feb 27, 2012 at 3:17 PM, Patrick Dupre
<patrick.dupre@xxxxxxxxxx>   wrote:
          Hello,

          I am runing chrony
          chronyd.service - NTP client/server
                   Loaded: loaded (/lib/systemd/system/chronyd.service;
          enabled)
                   Active: active (running) since Mon, 27 Feb 2012
          22:42:01 +0100; 35min ago
                 Main PID: 4150 (chronyd)
                   CGroup: name=systemd:/system/chronyd.service
                           └ 4150 /usr/sbin/chronyd -u chrony

          but my clock is still not on time.
          How can I synchronize is manually (before I sued to do ntpdate
          time.server.

Run: system-config-date
and in the Time Zone display be sure UTC is checked.

Unless somebody broke ntp that last is in no way required. It has never been
required. It doesn't even seem to require the motherboard clock to be set to
UTC.

{^_^}

Although it is always good to hear from jdow her statement is wrong. Tim
Waugh and I spent at least a month trying to debug the fact that on my
network printer browsing did not work. After a lot of agony and
searching log files we found that the problem was the print client was
jumping around in time so the server got confused about the browsing and
just gave up. Also ntpd would quit shortly after it was started. The
problem was fixed by checking UTC in the system-config-date display.

I cannot speak to chrony. But I've been running ntp happily since it was xntp.

On my SL6.2 virtual test machines which run in VirtualBox hosted on Win 7 the
clocks are all set, properly, to Los Angeles time. ntp locks right up slick
as you could ask. I do take back the bit about motherboard running UTC. I
notice VirtualBox has the UTC checkbox ticked. So motherboard is UTC. I
believe there is a configuration setting for NTP to handle that. But the
timezone setting certainly does not have to he UTC.

[jdow@sl6 ~]$ date;date -u
Wed Feb 29 15:49:08 PST 2012
Wed Feb 29 23:49:08 UTC 2012

ntpq> peers
     remote           refid      st t when poll reach   delay   offset  jitter
==============================================================================
+we.love.servers 192.43.244.18    2 u   29   64  377   36.411  -84.322  10.851
+64.73.32.134    192.36.143.150   2 u    1   64  377   85.706  -101.83  11.770
-mirror          204.9.54.119     2 u   46   64  377   83.161  -69.662  21.143
*me2.xxxxxxxxx.x 69.25.96.13      2 u   44   64  377    0.431  -97.046  13.406


On the SL6.2 firewall machine the motherboard clock is set to UTC, the system
is set to Los Angeles time.
[jdow@me2 ~]$ date;date -u
Wed Feb 29 15:49:43 PST 2012
Wed Feb 29 23:49:43 UTC 2012

It setup this way mostly right out of the box. I had OTHER problems porting
in my very historically based configuration; but, ntp was no big deal.

(SELinux is a borked pain in the asterisk. I leave it running. But I am less
and less enthused by it every day. It, dhcpd, named, and SpamAssassin don't
seem to get along well together when dhcpd is supposed to update a useful
dhcpd setup. And some how named gets MANY hanging locks that make it
impossible to shut it down gracefully.)

This is the important part of the setup.
===8<---
driftfile /var/lib/ntp/drift
restrict -6 default kod nomodify notrap nopeer noquery
restrict 127.0.0.1
restrict -6 ::1
server 0.rhel.pool.ntp.org iburst
server 1.rhel.pool.ntp.org iburst
server 2.rhel.pool.ntp.org iburst
includefile /etc/ntp/crypto/pw
keys /etc/ntp/keys
#trustedkey 4 8 42
===8<---

/etc/sysconfig/clock:
ZONE="America/Los Angeles"

The virtual machines are similar:
===8<---
driftfile /var/lib/ntp/drift
restrict default kod nomodify notrap nopeer noquery
restrict -6 default kod nomodify notrap nopeer noquery
restrict 127.0.0.1
restrict -6 ::1

server 0.rhel.pool.ntp.org iburst
server 1.rhel.pool.ntp.org iburst
server 2.rhel.pool.ntp.org iburst

includefile /etc/ntp/crypto/pw
keys /etc/ntp/keys

# new machine (A pointer to the local server)
server 192.168.xx.1
===8<---

/etc/sysconfig/clock:
ZONE="America/Los Angeles"



{^_^}
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