RE: Virtual server not serving?

Volker

I'm having the same problems as you but I need to get it working by
Monday am. Almost identical layout AS 2.1 on the two routers RH 8.0 on
three web servers.

I'm testing with just one real server and have stopped the iptables
service on both servers for testing purposes. 

The pulse service is starting and everything appears OK but the requests
are not getting through to the real server, the http monitoring requests
are though (can see them in access log):

CURRENT LVS ROUTING TABLE 

	IP Virtual Server version 0.8.1 (size=65536)                   
Prot LocalAddress:Port Scheduler Flags                         
  -> RemoteAddress:Port             Forward Weight ActiveConn InActConn
TCP  213.130.136.245:80 wlc
  -> 10.0.0.110:80                  Masq    1      0          0         
	
 
CURRENT LVS PROCESSES 
root     10892  0.0  0.1  1608  596 ?        S    06:43   0:00 pulse
root     10895  0.0  0.1  1596  588 ?        S    06:44   0:00
/usr/sbin/lvs --nofork -c /etc/sysconfig/ha/lvs.cf
root     10902  0.0  0.1  1644  640 ?        S    06:44   0:00
/usr/sbin/nanny -c -h 10.0.0.110 -p 80 -s GET / HTTP/1.0\r\n\r\n -x H


The annoying thing is that I managed to get it working prior to shiping
the servers to ISP, had to change ip's and gateway on eth0. Also fiddled
with the httpd.conf though.

Thoughts:

Are you starting the pulse service prior to bringing up the web servers?
I've noticed a debug_level in the lvs.cf file may be worth a look.
Check your httpd.conf file.
Have you checked back in the archive for similar issues?

I'm hacking these variables now. Keep in touch

 
Cheers
Brendan Rooney 



-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of Volker Kindermann
Sent: 03 November 2002 08:39
To: [email protected]
Subject: Virtual server not serving?


Hello,


I have a problem with a virtual server and have to solve it till monday
afternoon.

I'm trying to set up a virtual server (two load-balancers and two
realserver) to balance http-requests to the real servers. I'm using
redhat 7.3 with the latest errata and the ipvsadm tool from redhat 8.0
and the piranha packet from advanced server.

Failover between the load-balancers works well as fas as the network
interfaces are concerned.

The big problem is, that the load balancers won't open any listener on
the virtual server's ip port 80 (that's the service I want to provide).

There are one lvs process, two nanny processes, a pulse process and the
piranha-gui process.

I can ping the virtual ip and the real-servers from outside, so the
routing should be fine (traceroute from outside to the real servers is
possible).

I can reach each realserver's port 80 from the loadbalancers.

But I couldn't connect to the virtual server's ip port 80 from outside.

It would be great if someone could give me a hint whats wrong. 

Here is the system info:

# cat /etc/sysconfig/ha/lvs.cf

serial_no = 57
primary = 192.168.100.1
primary_private = 192.168.0.1
service = lvs
backup_active = 1
backup = 192.168.100.2
backup_private = 192.168.0.2
heartbeat = 1
heartbeat_port = 539
keepalive = 6
deadtime = 18
network = nat
nat_router = 10.0.0.100 eth0:1
nat_nmask = 255.255.255.0
reservation_conflict_action = preempt
#debug_level = NONE
debug_level = 7
rsh_command = ssh
virtual Webservice {
     active = 1
     address = 192.168.100.100 eth2:1
     vip_nmask = 255.255.255.0
     port = 80
     persistent = 360
     send = "GET / HTTP/1.0\r\n\r\n"
     expect = "HTTP"
     load_monitor = uptime
     scheduler = wlc
     protocol = tcp
     timeout = 6
     reentry = 15
     quiesce_server = 0
     server unten {
         address = 10.0.0.10
         active = 1
         weight = 1
     }
     server oben {
         address = 10.0.0.20
         active = 1
         weight = 1
     }
}



# ifconfig

eth0      Link encap:Ethernet  HWaddr 00:01:02:41:61:AD  
          inet addr:10.0.0.1  Bcast:10.0.0.255  Mask:255.255.255.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:2625 errors:0 dropped:0 overruns:0 frame:0
          TX packets:3166 errors:0 dropped:0 overruns:0 carrier:0
          collisions:144 txqueuelen:100 
          RX bytes:907120 (885.8 Kb)  TX bytes:339000 (331.0 Kb)
          Interrupt:10 Base address:0x3800 

eth0:1    Link encap:Ethernet  HWaddr 00:01:02:41:61:AD  
          inet addr:10.0.0.100  Bcast:10.0.0.255  Mask:255.255.255.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          Interrupt:10 Base address:0x3800 

eth1      Link encap:Ethernet  HWaddr 00:E0:29:2E:77:6A  
          inet addr:192.168.0.1  Bcast:192.168.0.255  Mask:255.255.255.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:64 errors:0 dropped:0 overruns:0 frame:0
          TX packets:68 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:100 
          RX bytes:4484 (4.3 Kb)  TX bytes:4080 (3.9 Kb)
          Interrupt:5 Base address:0x3400 

eth2      Link encap:Ethernet  HWaddr 00:E0:29:30:B0:1C  
          inet addr:192.168.100.1  Bcast:192.168.100.255 
Mask:255.255.255.0          UP BROADCAST RUNNING MULTICAST  MTU:1500 
Metric:1          RX packets:63 errors:0 dropped:0 overruns:0 frame:0
          TX packets:72 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:100 
          RX bytes:4424 (4.3 Kb)  TX bytes:4320 (4.2 Kb)
          Interrupt:9 Base address:0x3c00 

eth2:1    Link encap:Ethernet  HWaddr 00:E0:29:30:B0:1C  
          inet addr:192.168.100.100  Bcast:192.168.100.255 
Mask:255.255.255.0          UP BROADCAST RUNNING MULTICAST  MTU:1500 
Metric:1          Interrupt:9 Base address:0x3c00 

lo        Link encap:Local Loopback  
          inet addr:127.0.0.1  Mask:255.0.0.0
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)


# route -n

Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use
Iface 192.168.100.0   0.0.0.0         255.255.255.0   U     0      0    
   0 eth2 10.0.0.0        0.0.0.0         255.255.255.0   U     0      0
       0 eth0 192.168.0.0     0.0.0.0         255.255.255.0   U     0   
  0        0 eth1 127.0.0.0       0.0.0.0         255.0.0.0       U    
0      0        0 lo


# ipvsadm -L

IP Virtual Server version 1.0.4 (size=65536)
Prot LocalAddress:Port Scheduler Flags
  -> RemoteAddress:Port           Forward Weight ActiveConn InActConn
TCP  192.168.100.100:http wlc persistent 360
  -> oben.testdomain.de:http      Masq    1      0          0         
  -> unten.testdomain.de:http     Masq    1      0          0         


# iptables -L -v

Chain INPUT (policy ACCEPT 0 packets, 0 bytes)
 pkts bytes target     prot opt in     out     source              
destination         

Chain FORWARD (policy ACCEPT 0 packets, 0 bytes)
 pkts bytes target     prot opt in     out     source              
destination         

Chain OUTPUT (policy ACCEPT 0 packets, 0 bytes)
 pkts bytes target     prot opt in     out     source              
destination         

# iptables -t nat -L -v

Chain PREROUTING (policy ACCEPT 3 packets, 210 bytes)
 pkts bytes target     prot opt in     out     source              
destination         

Chain POSTROUTING (policy ACCEPT 4 packets, 205 bytes)
 pkts bytes target     prot opt in     out     source              
destination           798 56088 MASQUERADE  all  --  any    any    
10.0.0.0/24          anywhere           

Chain OUTPUT (policy ACCEPT 802 packets, 56293 bytes)
 pkts bytes target     prot opt in     out     source              
destination         


# uname -a

Linux lbunten 2.4.18-17.7.xcustom #2 Fri Nov 1 08:21:49 CET 2002 i686
unknown


# rpm -q piranha

piranha-0.7.0-3


# rpm -q ipvsadm

ipvsadm-1.21-4



Thank you very much for any hint. As I said above, monday there will be
the decision if this project is done with redhat.

Please help
Thanks
Volker



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