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On Tue, Mar 05, 2013 at 05:11:30PM +0100, maillist@xxxxxxxxxxxx wrote:
> > On Mon, Mar 04, 2013 at 02:59:56PM +0100, maillist@xxxxxxxxxxxx wrote:
> >> Hi,
> >>
> >> I hope this is the right place for this question because I tried other
> >> places and no response from people so this is my last resort I guess.
> >>
> >> I'm looking for someone with experience with Syncdaemon IPVS and the
> >> piranha package.
> >> I'm trying to build a loadbalancer with session information synchronized
> >> between the hosts.
> >>
> >> The problem is that I don't see the session information on the backup
> >> node
> >> (server-b) with the command ipvsadm -Lcn
> >>
> >> The config:
> >> --- LVS.CF ---
> >> serial_no = 19
> >> primary = <IP server-a>
> >> service = lvs
> >> backup_active = 1
> >> backup = <IP server-b>
> >> heartbeat = 1
> >> heartbeat_port = 539
> >> keepalive = 6
> >> deadtime = 18
> >> network = direct
> >> debug_level = NONE
> >> monitor_links = 1
> >> syncdaemon = 1
> >> syncd_iface = eth0
> >> syncd_id = 1
> >> virtual http {
> >> active = 1
> >> address = <VIP_IP> eth0:1
> >> vip_nmask = 255.255.255.255
> >> port = 80
> >> send = "GET / HTTP/1.0\r\n\r\n"
> >> expect = "HTTP"
> >> use_regex = 0
> >> load_monitor = none
> >> scheduler = rr
> >> protocol = tcp
> >> timeout = 6
> >> reentry = 15
> >> quiesce_server = 0
> >> persistent = 120
> >> server server-a {
> >> address = <IP server-a>
> >> active = 1
> >> weight = 1
> >> }
> >> server server-b {
> >> address = <IP server-b>
> >> active = 1
> >> weight = 1
> >> }
> >> }
> >>
> >> --- LVS.CF ---
> >>
> >> On the backup node i see with netstat -tulpen:
> >> udp 0 0 224.0.0.81:8848 0.0.0.0:*
> >>
> >> >From the documentation I know it's multicast udp.
> >>
> >> A TCP dump shows me that server-a is sending packages:
> >>
> >> [root@server-a ~]# tcpdump -ni eth0 host 224.0.0.81
> >> tcpdump: verbose output suppressed, use -v or -vv for full protocol
> >> decode
> >> listening on eth0, link-type EN10MB (Ethernet), capture size 65535 bytes
> >> 16:24:29.726138 IP server-a.54366 > 224.0.0.81.8848: UDP, length 100
> >> 16:24:35.726112 IP server-a.54366 > 224.0.0.81.8848: UDP, length 100
> >> 16:24:36.726189 IP server-a.54366 > 224.0.0.81.8848: UDP, length 100
> >> 16:24:37.726128 IP server-a.54366 > 224.0.0.81.8848: UDP, length 100
> >>
> >> [root@server-b ~]# tcpdump -ni eth0 host 224.0.0.81
> >> tcpdump: verbose output suppressed, use -v or -vv for full protocol
> >> decode
> >> listening on eth0, link-type EN10MB (Ethernet), capture size 65535 bytes
> >> 16:24:30.177808 IP server-a.54366 > 224.0.0.81.8848: UDP, length 100
> >> 16:24:36.177817 IP server-a.54366 > 224.0.0.81.8848: UDP, length 100
> >> 16:24:37.177847 IP server-a.54366 > 224.0.0.81.8848: UDP, length 100
> >> 16:24:38.177760 IP server-a.54366 > 224.0.0.81.8848: UDP, length 100
> >>
> >> Server-b get the traffic on it's interface but does nothing with it.
> >> ipvsadm -Lcn on server-a show a list with information but on server-b
> >> nothing but documentation states that it should and there is a kernel
> >> thread running called [ipvs_syncbackup].
> >>
> >> A strace of the pulse process on server-b shows only the polling of
> >> server-a.
> >>
> >> So what am I missing here? I hope somebody has a clue.
> >
> > What version of piranha are you using? Also, please run 'ivpsadm
> > --list --daemon' on each director to verify the sync daemon is running
> > as expected.
> >
> > Ryan
> >
>
> The version of piranha is: piranha-0.8.5-19.el6.x86_64
This version should work, but I have fixed a few bugs in piranha
related to the sync daemon. I'd update if possible.
> The command "ipvsadm --list --daemon" does not return anything?
>
> Does I mis a running daemon? Which daemon would that be?
You might be hitting a bug in ipvsadm. I reported a bug where 'ipvsadm
--list --daemon' where it would not show a running sync daemon in
backup state. I'm not sure if it was every fixed upstream, but I did
fix in the RHEL. Check your version of ipvsadm. The
ipvsadm-1.25-10.el6 package should have the fix.
Ryan
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