Re: [CentOS] dhcpd rpm

[Ausmus, Matt]

> -Original Message-
> From: Todd Denniston [mailto:todd.dennis...@tsb.cranrdte.navy.mil]
> Sent: Monday, October 18, 2010 10:43 AM
> To: CentOS mailing list
> Subject: Re: [CentOS] dhcpd rpm
> 
> Ausmus, Matt wrote, On 10/18/2010 01:11 PM:
> > Howdy,
> >
> >
> 
> >
> > We’ve found the problem is generally caused by the time being out
> of
> >  sync between the servers or the dhcpd daemon on one of the boxes
> dies.
> 
> 
> NTP does not keep them closely enough synchronized?
> OH, and in case you were not aware of it, you could run NTP on one of
> them using local clock if you
> don't have a good trust able time server available for some reason.
> Also making your DHCP machines
> NTP peers would be good too.
> 
> Or are you talking about some other type of time?
> 
> --
> Todd Denniston
> Crane Division, Naval Surface Warfare Center (NSWC Crane)
> Harnessing the Power of Technology for the Warfighter

I think the problem we have/had was related to a Layer 8 issue.  I have student 
workers build our DHCP servers from specifications that I give them.  What more 
than likely happened was that dhcpdate wasn't run on the boxes when they were 
first built causing the date & time to be off and ntpd having issues getting 
the time back in line.  My understanding of how ntpd works is that if the time 
is off too much it sees the time difference as irrational and is not able to 
pull it back in line.  Once I run ntpdate on those boxes the issues go away and 
ntpd is able to maintain the time sync fine.

Matt Ausmus
Network Administrator
Chapman University

"Nothing is ever accomplished by a reasonable man."
-Bucy’s Law
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Re: [CentOS] dhcpd rpm

[Todd Denniston]

Ausmus, Matt wrote, On 10/18/2010 01:11 PM:
> Howdy,
> 
>  

> 
> We’ve found the problem is generally caused by the time being out of 
>  sync between the servers or the dhcpd daemon on one of the boxes dies.


NTP does not keep them closely enough synchronized?
OH, and in case you were not aware of it, you could run NTP on one of them 
using local clock if you
don't have a good trust able time server available for some reason. Also making 
your DHCP machines
NTP peers would be good too.

Or are you talking about some other type of time?

-- 
Todd Denniston
Crane Division, Naval Surface Warfare Center (NSWC Crane)
Harnessing the Power of Technology for the Warfighter
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[CentOS] dhcpd rpm

[R P Herrold]

On Mon, 18 Oct 2010, Ausmus, Matt wrote:

> Yeah, this issue’s been brought up in the past.  One of the 
> maintainer of FC 13 made the srpm available (I believe he 
> prepped the spec file) for RHEL/CentOS 5 for dhcpd 4.1.  We 
> started looking at it and the problems are the dependencies 
> and the dependencies of the dependencies.  There are no 
> srpms or rpms for those and the project becomes a real 
> monster.

When this was raised before, I looked and there was a 
dhcp-4.2.0-11.fc15.src.rpm in RawHide; today I find 
dhcp-4.2.0-12.fc15.src.rpm

As I recall from trial builds, the first required fairly 
invasive changes in the initscripts, and I was not willing to 
sacrifice the time on a test box to satisfy idle curousity

Running a build at the latest code I also find it dies on this 
file, probably a either a missed new interface, or a mistake 
in the .c code

gcc -DHAVE_CONFIG_H -I. -I../includes  -I..
-DLOCALSTATEDIR='"/var"'   -O2 -g -pipe -Wall
-Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector
--param=ssp-buffer-size=4 -m64 -mtune=generic
-fno-strict-aliasing -fPIE -D_GNU_SOURCE  -I../bind/include
-MT resolv.o -MD -MP -MF .deps/resolv.Tpo -c -o resolv.o
resolv.c
resolv.c: In function 'read_resolv_conf':
resolv.c:52: error: 'O_CLOEXEC' undeclared (first use in this 
function)
resolv.c:52: error: (Each undeclared identifier is reported 
only once
resolv.c:52: error: for each function it appears in.)
make[2]: *** [resolv.o] Error 1

It is not clear why local includes of the resolver libraries 
are present.  Probably the right place to have these 
discussions are in Fedora or upstream, however

-- Russ herrold
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Re: [CentOS] dhcpd rpm

[Ausmus, Matt]

Howdy,

 

Yeah, this issue’s been brought up in the past.  One of the maintainer of FC 13 
made the srpm available (I believe he prepped the spec file) for RHEL/CentOS 5 
for dhcpd 4.1.  We started looking at it and the problems are the dependencies 
and the dependencies of the dependencies.  There are no srpms or rpms for those 
and the project becomes a real monster.  

 

We’ve found the problem is generally caused by the time being out of sync 
between the servers or the dhcpd daemon on one of the boxes dies.  To mitigate 
this problem we’ve setup custom Nagios alerts which utilize dhcping to alert us 
when a dhcpd process dies.  We’ve also setup custom scripts that will restart 
the dead process on the box.  So, we’re just waiting for CentOS 6 to be 
released.

 



Matt Ausmus

Network Administrator

Chapman University

635 West Palm Street

Orange, CA  92868

(714)628-2738

maus...@chapman.edu <mailto:maus...@chapman.edu> 

 

"Nothing is ever accomplished by a reasonable man."

-Bucy’s Law

From: Waleed Harbi [mailto:waleed.ha...@gmail.com] 
Sent: Thursday, October 14, 2010 1:49 PM
To: CentOS mailing list
Subject: Re: [CentOS] dhcpd rpm

 

Try find-out SPEC file and rpm source, recompile it, this is the faster way I 
think, if you have big issue. 

 

Fedora they released 4.1, check it. 

 

http://mirrors.isu.net.sa/pub/fedora/linux/releases/13/Everything/x86_64/os/Packages/dhclient-4.1.1-15.fc13.x86_64.rpm

 

--
Best Wishes,
Waleed Harbi

Dream | Do | Be 



On Thu, Oct 14, 2010 at 11:44 PM,  wrote:

JohnS wrote:
>
> On Thu, 2010-10-14 at 14:58 -0400, m.r...@5-cent.us wrote:
>> Folks,
>>
>>We've been having occasional issues with failover dhcpd. I went
>> looking for "peer holds all free leases", and happened to run across
>> <https://bugzilla.redhat.com/show_bug.cgi?format=multiple&id=610219>,
>> which is rated important, and is supposed to be fixed in 3.0.5-24.
>> Looking at the repo at kernel.org, all I see is what we have,
>> dhclient-3.0.5-23.el5.x86_64.rpm.
>>
>>Any idea when this update will be released?

> ---
> Bother to even look on Upstreams Site?  It's not freely available yet as
> I see it.

No, I hadn't. I'm just a tad surprised - that was rated "important", and
looked as though it would be released soon. And with 6 coming soon, I was
thinking, though I haven't gone to look, that they'd have 3.1 or 4.x.

Thanks, though.

   mark


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Re: [CentOS] dhcpd rpm

[Waleed Harbi]

*Try find-out SPEC file and rpm source, recompile it, this is the faster way
I think, if you have big issue.

Fedora they released 4.1, check it.

http://mirrors.isu.net.sa/pub/fedora/linux/releases/13/Everything/x86_64/os/Packages/dhclient-4.1.1-15.fc13.x86_64.rpm

*--
Best Wishes,
Waleed Harbi

Dream | Do | Be


On Thu, Oct 14, 2010 at 11:44 PM,  wrote:

> JohnS wrote:
> >
> > On Thu, 2010-10-14 at 14:58 -0400, m.r...@5-cent.us wrote:
> >> Folks,
> >>
> >>We've been having occasional issues with failover dhcpd. I went
> >> looking for "peer holds all free leases", and happened to run across
> >> ,
> >> which is rated important, and is supposed to be fixed in 3.0.5-24.
> >> Looking at the repo at kernel.org, all I see is what we have,
> >> dhclient-3.0.5-23.el5.x86_64.rpm.
> >>
> >>Any idea when this update will be released?
> > ---
> > Bother to even look on Upstreams Site?  It's not freely available yet as
> > I see it.
>
> No, I hadn't. I'm just a tad surprised - that was rated "important", and
> looked as though it would be released soon. And with 6 coming soon, I was
> thinking, though I haven't gone to look, that they'd have 3.1 or 4.x.
>
> Thanks, though.
>
>mark
>
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Re: [CentOS] dhcpd rpm

[m . roth]

JohnS wrote:
>
> On Thu, 2010-10-14 at 14:58 -0400, m.r...@5-cent.us wrote:
>> Folks,
>>
>>We've been having occasional issues with failover dhcpd. I went
>> looking for "peer holds all free leases", and happened to run across
>> ,
>> which is rated important, and is supposed to be fixed in 3.0.5-24.
>> Looking at the repo at kernel.org, all I see is what we have,
>> dhclient-3.0.5-23.el5.x86_64.rpm.
>>
>>Any idea when this update will be released?
> ---
> Bother to even look on Upstreams Site?  It's not freely available yet as
> I see it.

No, I hadn't. I'm just a tad surprised - that was rated "important", and
looked as though it would be released soon. And with 6 coming soon, I was
thinking, though I haven't gone to look, that they'd have 3.1 or 4.x.

Thanks, though.

mark

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Re: [CentOS] dhcpd rpm

[JohnS]

On Thu, 2010-10-14 at 14:58 -0400, m.r...@5-cent.us wrote:
> Folks,
> 
>We've been having occasional issues with failover dhcpd. I went looking
> for "peer holds all free leases", and happened to run across
> ,
> which is rated important, and is supposed to be fixed in 3.0.5-24.
> Looking at the repo at kernel.org, all I see is what we have,
> dhclient-3.0.5-23.el5.x86_64.rpm.
> 
>Any idea when this update will be released?
> 
>  mark "we won't mention 3.1 or 4.x"
---
Bother to even look on Upstreams Site?  It's not freely available yet as
I see it.

John

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[CentOS] dhcpd rpm

[m . roth]

Folks,

   We've been having occasional issues with failover dhcpd. I went looking
for "peer holds all free leases", and happened to run across
,
which is rated important, and is supposed to be fixed in 3.0.5-24.
Looking at the repo at kernel.org, all I see is what we have,
dhclient-3.0.5-23.el5.x86_64.rpm.

   Any idea when this update will be released?

 mark "we won't mention 3.1 or 4.x"

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