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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
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