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I just reran the tests from 2 clients. The director exhibited the same
behavior for both clients:
1. Initial connection from client established from a web browser to the
lvs VIP. One real server, http. Here are the salient bits from ipvsadm
$ ipvsadm -L -n
IP Virtual Server version 1.0.10 (size=65536)
Prot LocalAddress:Port Scheduler Flags
-> RemoteAddress:Port Forward Weight ActiveConn InActConn
TCP 152.2.210.46:80 rr persistent 300
-> 192.168.2.2:80 Masq 1 1 0
$ ipvsadm -L -c -n |grep <client1>
TCP 14:55 ESTABLISHED <client1>:49598 152.2.210.46:80 192.168.2.2:80
TCP 00:53 SYN_RECV <client1>:0 152.2.210.46:80 192.168.2.2:80
2. After 3-5 seconds, the connection switches to inactive in ipvsadm,
and the connection state switches to FIN_WAIT. More page loads from the
client don't change the status of the connection on the director.
$ ipvsadm -L -n
IP Virtual Server version 1.0.10 (size=65536)
Prot LocalAddress:Port Scheduler Flags
-> RemoteAddress:Port Forward Weight ActiveConn InActConn
TCP 152.2.210.46:80 rr persistent 300
-> 192.168.2.2:80 Masq 1 0 1
$ ipvsadm -L -c -n |grep <client1>
TCP 01:54 FIN_WAIT <client1>:49598 152.2.210.46:80 192.168.2.2:80
TCP 00:47 SYN_RECV <client1:0 152.2.210.46:80 192.168.2.2:80
3. Still loading new pages in the browser on the client. Connection is
reported as inactive, and the state switches to TIME_WAIT.
$ ipvsadm -L -n
IP Virtual Server version 1.0.10 (size=65536)
Prot LocalAddress:Port Scheduler Flags
-> RemoteAddress:Port Forward Weight ActiveConn InActConn
TCP 152.2.210.46:80 rr persistent 300
-> 192.168.2.2:80 Masq 1 0 1
$ ipvsadm -L -c -n |grep <client1>
TCP 01:55 TIME_WAIT <client1>:49598 152.2.210.46:80 192.168.2.2:80
TCP 00:55 SYN_RECV <client1>:0 152.2.210.46:80 192.168.2.2:80
4. It's not until the connection disappears from /proc/net/ip_vs_conn
and the InActConn is decremented that a new connection from the same
client causes an increment of the ActiveConn count.
Is this normal behavior for http services on ipvs?
Thanks again,
-John R.
On Wed, 2004-02-04 at 20:59, Horms wrote:
> Can you confirm that an entry is added to that list for each connection
> you make? You should be able to identify it by the src ip address and
> port pair. You can get this information from tcpdump if need be.
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