Debian Bug report logs - #810971
isc-dhcp-server: Failover synchronization of client-hostname not work.

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Message #5 received at submit@bugs.debian.org (full text, mbox, reply):

From: Pavel Polacek <pavel.polacek@ujep.cz>

To: Debian Bug Tracking System <submit@bugs.debian.org>

Subject: isc-dhcp-server: Failover synchronization of client-hostname not work.

Date: Thu, 14 Jan 2016 12:15:43 +0100

Package: isc-dhcp-server
Version: 4.3.1-6
Severity: normal

Dear Maintainer,

 DHCP servers in failover configuration not synchronize client-hostname record in dhcpd database. "client-hostname" record differs in database of DHCP failover cluster, all other parts of record is synced. 

First server - Kremilek - database record:                   
lease 192.168.38.67 {                          
  starts 4 2016/01/14 09:28:42;               
  ends 4 2016/01/14 21:28:42;                
  tstp 5 2016/01/15 03:28:42;                       
  tsfp 5 2016/01/15 03:28:42;
  atsfp 5 2016/01/15 03:28:42;
  cltt 4 2016/01/14 09:28:42;
  binding state active;
  next binding state expired;
  hardware ethernet ac:16:2d:06:21:24;
  uid "\001\254\026-\006!$";
  set vendor-class-identifier = "MSFT 5.0";
  client-hostname "SAL-FIALOVY";
}

Syslog of Kremilek:
Jan 14 09:58:38 kremilek dhcpd: DHCPDISCOVER from ac:16:2d:06:21:24 via 192.168.38.3
Jan 14 09:58:39 kremilek dhcpd: DHCPOFFER on 192.168.38.67 to ac:16:2d:06:21:24 (SAL-FIALOVY) via 192.168.38.3
Jan 14 09:58:42 kremilek dhcpd: DHCPDISCOVER from ac:16:2d:06:21:24 (SAL-FIALOVY) via 192.168.38.3
Jan 14 09:58:42 kremilek dhcpd: DHCPOFFER on 192.168.38.67 to ac:16:2d:06:21:24 (SAL-FIALOVY) via 192.168.38.3
Jan 14 09:58:42 kremilek dhcpd: DHCPDISCOVER from ac:16:2d:06:21:24 (SAL-FIALOVY) via 192.168.38.2
Jan 14 09:58:42 kremilek dhcpd: DHCPOFFER on 192.168.38.67 to ac:16:2d:06:21:24 (SAL-FIALOVY) via 192.168.38.2
Jan 14 09:58:42 kremilek dhcpd: DHCPREQUEST for 192.168.38.67 (192.168.24.21) from ac:16:2d:06:21:24 (SAL-FIALOVY) via 192.168.38.3
Jan 14 09:58:42 kremilek dhcpd: DHCPACK on 192.168.38.67 to ac:16:2d:06:21:24 (SAL-FIALOVY) via 192.168.38.3

Second server - Vochomurka - database record:
lease 192.168.38.67 {
  starts 4 2016/01/14 09:28:42;
  ends 4 2016/01/14 21:28:42;
  tstp 3 2016/01/13 08:01:05;
  tsfp 5 2016/01/15 03:28:42;
  atsfp 5 2016/01/15 03:28:42;
  cltt 3 2016/01/13 05:30:39;
  binding state active;
  next binding state expired;
  hardware ethernet ac:16:2d:06:21:24;
  uid "\001\254\026-\006!$";
  client-hostname "VK-PULT2";
}

Syslog of Vochomurka:
Jan 14 09:58:38 vochomurka dhcpd: DHCPDISCOVER from ac:16:2d:06:21:24 via 192.168.38.3: load balance to peer ujep
Jan 14 09:58:38 vochomurka dhcpd: DHCPDISCOVER from ac:16:2d:06:21:24 via 192.168.38.2: load balance to peer ujep
Jan 14 09:58:42 vochomurka dhcpd: DHCPDISCOVER from ac:16:2d:06:21:24 via 192.168.38.3
Jan 14 09:58:42 vochomurka dhcpd: uid lease 192.168.38.177 for client ac:16:2d:06:21:24 is duplicate on 192.168.38.0/24
Jan 14 09:58:42 vochomurka dhcpd: DHCPREQUEST for 192.168.38.67 (192.168.24.21) from ac:16:2d:06:21:24 (VK-PULT2) via 192.168.38.3: lease owned by peer
Jan 14 09:58:42 vochomurka dhcpd: uid lease 192.168.38.177 for client ac:16:2d:06:21:24 is duplicate on 192.168.38.0/24
Jan 14 09:58:42 vochomurka dhcpd: DHCPREQUEST for 192.168.38.67 (192.168.24.21) from ac:16:2d:06:21:24 (VK-PULT2) via 192.168.38.2: lease owned by peer
Jan 14 09:58:43 vochomurka dhcpd: DHCPOFFER on 192.168.38.177 to ac:16:2d:06:21:24 (SAL-FIALOVY) via 192.168.38.3


-- System Information:
Debian Release: 8.2
  APT prefers stable-updates
  APT policy: (500, 'stable-updates'), (500, 'stable')
Architecture: amd64 (x86_64)

Kernel: Linux 3.16.0-4-amd64 (SMP w/3 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages isc-dhcp-server depends on:
ii  debconf [debconf-2.0]  1.5.56
ii  debianutils            4.4+b1
ii  isc-dhcp-common        4.3.1-6
ii  libc6                  2.19-18+deb8u1
ii  libdns-export100       1:9.9.5.dfsg-9+deb8u3
ii  libirs-export91        1:9.9.5.dfsg-9+deb8u3
ii  libisc-export95        1:9.9.5.dfsg-9+deb8u3
ii  lsb-base               4.1+Debian13+nmu1

isc-dhcp-server recommends no packages.

Versions of packages isc-dhcp-server suggests:
pn  isc-dhcp-server-ldap  <none>

-- Configuration Files:
/etc/dhcp/dhcpd.conf changed [not included]

-- debconf information excluded

Message #10 received at 810971@bugs.debian.org (full text, mbox, reply):

From: Pavel Polacek <pavel.polacek@ujep.cz>

To: 810971@bugs.debian.org

Subject: Re: Bug#810971: Acknowledgement (isc-dhcp-server: Failover synchronization of client-hostname not work.)

Date: Fri, 25 Nov 2016 08:08:46 +0100 (CET)

    Hello,

  I reported issue to upstream. Latest stable version of ISC DHCP solve 
the issue.

https://lists.isc.org/pipermail/dhcp-users/2016-October/020331.html

- Leases are now scrubbed of certain prior use information when pool
  re-balancing reassigns them from one FO peer to the other.  This
  corrects an issue where leases that were offered but ignored retained
  the client hostname from the original client. Thanks to Pavel Polacek,
  Jan Evangelista Purkyne University for reporting the issue.
  [ISC-Bugs #42008]

Is possible integrate patch ISC-Bugs #42008  to stable release?

    Best regards,
      Pavel Polacek


On Thu, 14 Jan 2016, Debian Bug Tracking System wrote:

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Message #15 received at 810971-close@bugs.debian.org (full text, mbox, reply):

From: Michael Gilbert <mgilbert@debian.org>

To: 810971-close@bugs.debian.org

Subject: Re: [pkg-dhcp-devel] Bug#810971: Acknowledgement (isc-dhcp-server: Failover synchronization of client-hostname not work.)

Date: Sat, 26 Nov 2016 02:19:20 -0500

version: 4.3.4-1

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