Public bug reported:
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
** Affects: ipvsadm (Ubuntu)
Importance: Undecided
Status: New
** Tags: ipvs ipvsadm lvs
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Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1830033
Title:
Connection synchronization daemon fails at start due to a bug in
launch script
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/ipvsadm/+bug/1830033/+subscriptions
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