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[Bug 1830033] Re: Connection synchronization daemon fails at start due to a bug in launch script

To: group.of.nepali.translators@xxxxxxxxxxxxxxxxxxx
From: Paride Legovini <1830033@xxxxxxxxxxxxxxxxxx>
Date: Thu, 23 May 2019 10:39:24 -0000
Reply-to: Bug 1830033 <1830033@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx
Thanks for your report. This has been fixed in Debian version 1.29-1 by

https://salsa.debian.org/ipvs-team/pkg-
ipvsadm/commit/aa1dc89fb8712d45df9141264066fb5dfe139cb2

and therefore in Ubuntu Cosmic and newer. The fix qualifies to be ported
to Xenial and Bionic.

** Tags added: server-next

** Also affects: ipvsadm (Ubuntu Eoan)
   Importance: Undecided
       Status: New

** Also affects: ipvsadm (Ubuntu Cosmic)
   Importance: Undecided
       Status: New

** Also affects: ipvsadm (Ubuntu Xenial)
   Importance: Undecided
       Status: New

** Also affects: ipvsadm (Ubuntu Bionic)
   Importance: Undecided
       Status: New

** Also affects: ipvsadm (Ubuntu Disco)
   Importance: Undecided
       Status: New

** Changed in: ipvsadm (Ubuntu Cosmic)
       Status: New => Fix Released

** No longer affects: ipvsadm (Ubuntu Disco)

** No longer affects: ipvsadm (Ubuntu Eoan)

** Also affects: ipvsadm (Ubuntu Disco)
   Importance: Undecided
       Status: New

** No longer affects: ipvsadm (Ubuntu Disco)

** Changed in: ipvsadm (Ubuntu Xenial)
       Status: New => Triaged

** Changed in: ipvsadm (Ubuntu)
       Status: New => Triaged

** Changed in: ipvsadm (Ubuntu Bionic)
       Status: New => Triaged

** Bug watch added: Debian Bug tracker #808950
   https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=808950

** Also affects: ipvsadm (Debian) via
   https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=808950
   Importance: Unknown
       Status: Unknown

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https://bugs.launchpad.net/bugs/1830033

Title:
  Connection synchronization daemon fails at start due to a bug in
  launch script

Status in ipvsadm package in Ubuntu:
  Triaged
Status in ipvsadm source package in Xenial:
  Triaged
Status in ipvsadm source package in Bionic:
  Triaged
Status in ipvsadm source package in Cosmic:
  Fix Released
Status in ipvsadm package in Debian:
  Unknown

Bug description:
  The launch script for ipvsadm has a bug that prevents LVS from start
  in synchronization mode.

  How to reproduce.
  1. Install ipvsadm on ubuntu server 16.04 and modify /etc/default/ipvsadm to lauch LVS in master mode (or backup):
  AUTO="true"
  DAEMON="master"
  IFACE="eno1"	
  SYNCID="0"

  2. Start "ipvsadm" service and check systemd unit log: 
  # systemctl start ipvsadm
  # journalctl -u ipvsadm 
  What you expected to happen
  The log output without error:
  May 22 12:41:46 xxxxxxxxxxx systemd[1]: Starting LSB: ipvsadm daemon...
  May 22 12:41:46 xxxxxxxxxxx ipvsadm[4619]:  * Clearing the current IPVS table...
  May 22 12:41:46 xxxxxxxxxxx ipvsadm[4619]:    ...done.
  May 22 12:41:46 xxxxxxxxxxx ipvsadm[4619]:  * Loading IPVS configuration...
  May 22 12:41:46 xxxxxxxxxxx ipvsadm[4619]:    ...done.
  May 22 12:41:46 xxxxxxxxxxx ipvsadm[4619]:  * Starting IPVS Connection Synchronization Daemon master
  May 22 12:41:46 xxxxxxxxxxx ipvsadm[4619]:    ...done.
  May 22 12:41:46 xxxxxxxxxxx systemd[1]: Started LSB: ipvsadm daemon.  

  What happened instead: 
  May 22 12:32:59 xxxxxxx systemd[1]: Starting LSB: ipvsadm daemon...
  May 22 12:32:59 xxxxxxx ipvsadm[15743]:  * Clearing the current IPVS table...
  May 22 12:32:59 xxxxxxx ipvsadm[15743]:    ...done.
  May 22 12:32:59 xxxxxxx ipvsadm[15743]:  * Loading IPVS configuration...
  May 22 12:32:59 xxxxxxx ipvsadm[15743]:    ...done.
  May 22 12:32:59 xxxxxxx ipvsadm[15743]:  * Starting IPVS Connection Synchronization Daemon master
  May 22 12:32:59 xxxxxxx ipvsadm[15743]: Try `/sbin/ipvsadm -h' or '/sbin/ipvsadm --help' for more information.
  May 22 12:32:59 xxxxxxx ipvsadm[15743]:    ...fail!
  May 22 12:32:59 xxxxxxx ipvsadm[15743]:    ...done.
  May 22 12:32:59 xxxxxxx systemd[1]: Started LSB: ipvsadm daemon.

  As you can see in log output, there is an message: "Try `/sbin/ipvsadm
  -h' or '/sbin/ipvsadm --help' for more information". This message
  relates to bug in script /etc/init.d/ipvsadm.

  Here a difference how script should be updated to get it work:
  --- /etc/init.d/ipvsadm	2019-05-22 12:41:34.429916226 +0000
  +++ /root/ipvsadm	2019-05-22 11:18:04.307344255 +0000
  @@ -29,16 +29,16 @@
       case $DAEMON in
   	master|backup)
   	    log_daemon_msg "Starting IPVS Connection Synchronization Daemon" "$DAEMON"
  -	    $IPVSADM --start-daemon $DAEMON --mcast-interface \
  +	    $IPVSADM --syncid $SYNCID --start-daemon $DAEMON --mcast-interface \
           $IFACE --syncid $SYNCID || log_end_msg 1
   	    log_end_msg 0
   	    ;;
   	both)
   	    log_daemon_msg "Starting IPVS Connection Synchronization Daemon" "master"
  -	    $IPVSADM --start-daemon master --mcast-interface \
  +	    $IPVSADM --syncid $SYNCID --start-daemon master --mcast-interface \
           $IFACE --syncid $SYNCID  || FAILURE=1
   	    log_progress_msg "backup"
  -	    $IPVSADM --start-daemon backup --mcast-interface \
  +	    $IPVSADM --syncid $SYNCID --start-daemon backup --mcast-interface \
           $IFACE --syncid $SYNCID || FAILURE=1
   	    if [ "$FAILURE" -eq 1 ]
   	    then

  
  /root/ipvsadm - this is an original script from ipvsadm package

  
  # lsb_release -rd
  Description:	Ubuntu 16.04.6 LTS
  Release:	16.04
  # apt-cache policy ipvsadm
  ipvsadm:
    Installed: 1:1.28-3
    Candidate: 1:1.28-3
    Version table:
   *** 1:1.28-3 500
          500 http://nl.archive.ubuntu.com/ubuntu xenial/main amd64 Packages
          100 /var/lib/dpkg/status

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