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Today's Topics:
1. Re: Ubuntu update to isc-dhcp-server seems to have broken
config file processing (Simon Hobson)
2. RE: Ubuntu update to isc-dhcp-server seems to have broken
config file processing (bls s)
----------------------------------------------------------------------
Message: 1
Date: Fri, 4 Jun 2021 13:03:26 +0100
From: Simon Hobson <dh...@thehobsons.co.uk>
To: Users of ISC DHCP <dhcp-users@lists.isc.org>
Subject: Re: Ubuntu update to isc-dhcp-server seems to have broken
config file processing
Message-ID: <cb1bda23-e31b-4abc-afe2-b5103338b...@thehobsons.co.uk>
Content-Type: text/plain; charset=us-ascii
bls s <bls3...@outlook.com> wrote:
> I'm using isc-dhcp-server 4.4.1-2 on RasPiOS Buster, and it's working fine
> with the following subnet declaration:
>
> subnet 192.168.92.0 netmask 255.255.255.0 {
> option domain-search "foo.com", "dyn.foo.com";
> option broadcast-address 192.168.92.255;
> allow duplicates;
> ddns-updates off;
> pool {
> ddns-updates on;
> allow unknown-clients;
> option domain-name "dyn.foo.com";
> ddns-rev-domainname "dhcp";
> default-lease-time 86400;
> max-lease-time 86400;
> range 192.168.92.101 192.168.92.127;
> }
> }
That looks fine
> This same subnet config worked on Ubuntu 21.04 a couple of weeks ago, with
> isc-dhcp-server V4.4.1-2.2-ubuntu6 on it. Today I updated on Ubuntu, got
> isc-dhcp-server V4.4.1-2.2ubuntu6.1 and now isc-dhcp-server complains about
> "Can't clone pool group".
>
> I found that I can put the pool declaration outside of the subnet declaration
> on Ubuntu, and it works correctly. Unfortunately, doing this on RasPiOS fails!
Having a pool outside of a subnet isn't a valid config. It may appear to work,
as do some other config errors, but may cause some really "interesting" issues.
> Am I totally using subnet and pool incorrectly, or is this an incompatible
> change in isc-dhcp-server? And, is it an intended change coming to mainline
> isc-dhcp-server or did Ubuntu bork it?
I'd be thinking that there's something changed in the Ubuntu version. Can you
roll-back to the earlier version and try it again ?
Simon
------------------------------
Message: 2
Date: Fri, 4 Jun 2021 14:01:52 +0000
From: bls s <bls3...@outlook.com>
To: Users of ISC DHCP <dhcp-users@lists.isc.org>
Subject: RE: Ubuntu update to isc-dhcp-server seems to have broken
config file processing
Message-ID:
<mwhpr02mb2591ac27e741f12cdd2774eaa3...@mwhpr02mb2591.namprd02.prod.outlook.com>
Content-Type: text/plain; charset="us-ascii"
Thanks, Simon for confirming my understanding.
Yes, have backed off to the previous version and it works, so there's a
workaround.
I'm off to sort out how to file an actual bug report on Ubuntu in the hope that
they revert the change (whatever it is!).
Benn
-----Original Message-----
From: dhcp-users <dhcp-users-boun...@lists.isc.org> On Behalf Of Simon Hobson
Sent: Friday, June 4, 2021 5:03 AM
To: Users of ISC DHCP <dhcp-users@lists.isc.org>
Subject: Re: Ubuntu update to isc-dhcp-server seems to have broken config file
processing
bls s <bls3...@outlook.com> wrote:
> I'm using isc-dhcp-server 4.4.1-2 on RasPiOS Buster, and it's working fine
> with the following subnet declaration:
>
> subnet 192.168.92.0 netmask 255.255.255.0 {
> option domain-search "foo.com", "dyn.foo.com";
> option broadcast-address 192.168.92.255;
> allow duplicates;
> ddns-updates off;
> pool {
> ddns-updates on;
> allow unknown-clients;
> option domain-name "dyn.foo.com";
> ddns-rev-domainname "dhcp";
> default-lease-time 86400;
> max-lease-time 86400;
> range 192.168.92.101 192.168.92.127;
> }
> }
That looks fine
> This same subnet config worked on Ubuntu 21.04 a couple of weeks ago, with
> isc-dhcp-server V4.4.1-2.2-ubuntu6 on it. Today I updated on Ubuntu, got
> isc-dhcp-server V4.4.1-2.2ubuntu6.1 and now isc-dhcp-server complains about
> "Can't clone pool group".
>
> I found that I can put the pool declaration outside of the subnet declaration
> on Ubuntu, and it works correctly. Unfortunately, doing this on RasPiOS fails!
Having a pool outside of a subnet isn't a valid config. It may appear to work,
as do some other config errors, but may cause some really "interesting" issues.
> Am I totally using subnet and pool incorrectly, or is this an incompatible
> change in isc-dhcp-server? And, is it an intended change coming to mainline
> isc-dhcp-server or did Ubuntu bork it?
I'd be thinking that there's something changed in the Ubuntu version. Can you
roll-back to the earlier version and try it again ?
Simon
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------------------------------
End of dhcp-users Digest, Vol 152, Issue 3
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