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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
>
I have that version running: ipvsadm-1.25-10.el6.x86_64
So that's not the case I guess.
Is the syncdaemon a kernel thread?
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