[CentOS] ntp time server

Since we don't have any pressing need for a high-precision time source,
we just sync our main server to the public ntp.org pool and then have
everything else in the building sync to the main server.

We do have a pressing need for high-precision time which is why I run
a strat 1 time service in-house. I use other public strat 1 servers
as backup only.

Not knowing what country your from but at a U.S. taxpayer I have
no reservations about using time.nist.gov myself, some people
think it's rude to directly query stratum 1 servers.

I typically have 2-3 NTP servers per location behind a load balancer
and my internal servers sync against the load balanced VIP, and the
NTP servers themselves sync against time.nist.gov

nate

On Tue, Jul 21, 2009 at 5:16 PM, natewrote:
My server already is a stratum 1 time server. I use other external
strat 1 servers only as a backup. I was curious what hardware others
are running to have their own internal strat 1 servers.

Not knowing what country your from but at a U.S. taxpayer I have no
reservations about using time.nist.gov myself, some people think it's
rude to directly query stratum 1 servers.

I typically have 2-3 NTP servers per location behind a load balancer and
my internal servers sync against the load balanced VIP, and the NTP
servers themselves sync against time.nist.gov

nate



I'm not trying to hijack this thread but I have a question about how
typical this is for *core* infrastructure services. Do you load balance
other services as well? I'm thinking of dns, ldap, proxy, internal web
servers like a cms, radius, and probably more but those are some of the
services I try to make fault tolerant. Thanks.

If there are other interfaces available, FreeBSD does well as a timeserver
with SOME GPS receivers. But if it is working OK, I would just leave it
running unless the hardware is going south.

It's not so much that the hardware is currently going south, it's just
Sun being Sun. When a box gets this old, they start charging ungodly
amounts for support costs.

That's what eBay is for. ;^P

>

Dear Fellows:

I don't know if this is the right way to make this question but I have not
an idea of how do that so here goes:

I want to update some packages of my CentOS (eg.: Apache, PHP, etc.); when I
tried downloading the packages and requesting for it dependencies I need go
online again and download then, and again, and again....very tired.

So I need a way to set a repo (I can make the REPO in one of my local
servers) and once a request an update this come with dependences
satisficied.

I'm not talking of make a "yum -y update"; is more liked an intelligent
"rpm" with REPO connection. ;-)

Best Regards

Saludos Fraternales
_____________________________
Atte.
Alberto Garc?a G?mez M:.M:.
Administrador de Redes/Webmaster
IPI "Carlos Marx", Matanzas. Cuba.

Hi,

2009/7/23 Alberto Garc?a G?mez <alberto at ipimtzcm.rimed.cu>:
"yum" is "rpm" with repository connection and dependency solving.
There currently is no way to have RPM download and install
dependencies by itself, that is what "yum" is for.

You should look into using "createrepo" to create a "yum" repository.
It is not that hard.

Alternatively, you should look into already existing repositories for
CentOS that contain the versions of Apache and PHP that you want.

HTH,
Filipe

OK, maybe I don't write the right word, what I really need is an upgrade
(eg.: from PHP5.1.x to PHP5.2.x, and so on) and I don't know do that using
yum. What I do until know is downloading the packages from rpmfind.net and
when they request me some dependencies I download those packages again, and
again, and again......and that's what I want to avoid

Saludos Fraternales
_____________________________
Atte.
Alberto Garc?a G?mez M:.M:.
Administrador de Redes/Webmaster
IPI "Carlos Marx", Matanzas. Cuba.
----- Original Message -----
From: "Filipe Brandenburger" <filbranden at gmail.com>
To: "CentOS mailing list" <centos at centos.org>
Sent: Thursday, July 23, 2009 11:04 AM
Subject: Re: [CentOS] UPDATE over REPO


Hi,

2009/7/23 Alberto Garc?a G?mez <alberto at ipimtzcm.rimed.cu>:
"yum" is "rpm" with repository connection and dependency solving.
There currently is no way to have RPM download and install
dependencies by itself, that is what "yum" is for.

You should look into using "createrepo" to create a "yum" repository.
It is not that hard.

Alternatively, you should look into already existing repositories for
CentOS that contain the versions of Apache and PHP that you want.

HTH,
Filipe
_______________________________________________
CentOS mailing list
CentOS at centos.org
http://lists.centos.org/mailman/listinfo/centos

I wonder why we write all that documentation ...

<http://wiki.centos.org/AdditionalResources/Repositories>

Ralph

Not sure if this is precisely what you mean, but I have a similar issue.

I run some production RedHat servers (4.x) and CentOS for development
and test instances. The Apache/PHP packages we require are not
available via repos as they need some specific Oracle, Perl and other
miscellaneous packages. I need to rebuild the packages because of
these dependencies.

To ease the process, I use the Sourcexx: lines in the rpm spec file to
automatically retrieve sources from their online homes. This works if
the URLs are relatively consistent. For example:

Source0: http://www.apache.org/dist/httpd/httpd-%{version}.tar.gz

You could add another local server containing those packages then use
the Source line to specify the location of your local server.

you'll need to explain the differences as from where I'm sitting its
exactly yum.

On 7/23/09, Alberto Garc?a G?mez wrote:
<snip>
Bienvenido Alberto: Your written English is very good. I believe you
may also find some information in Spanish on the CentOS.org web site
and a Spanish language mailing list, but the majority of the activity
is on this mailing list. You may want to add the rpmforge and EPEL
repositories. Be sure to add the yum-priorities plug in.
<http://wiki.centos.org/PackageManagement/Yum/Priorities> If you add
EPEL, I suggest that you give it a very low priority or it will
replace a *lot* of packages in your CentOS box. Please remember that
this is an Enterprise distro and if you upgrade core packages and you
break it, it is your problem to fix...... :-) Saludos desde
Colombia