Hi all, I am trying to install two LVS servers connected with Heartbeat. As first step i installed just two servers and tested if pure LVS is working. Strange, with identical setup, it works on one server, not on another.
Here is setup: both nodes are ubuntu 8.04 ipvsadm is installed from standard ubuntu repo (apt-get install ipvsadm) I added following setup to /etc/rc.local echo 1 > /proc/sys/net/ipv4/ip_forward echo 0 > /proc/sys/net/ipv4/conf/all/send_redirects echo 0 > /proc/sys/net/ipv4/conf/eth0/send_redirects >From both LVS, I can reach real servers. Here is LVS setup I am testing: ipvsadm -C ipvsadm -A -t 192.168.21.100:80 -s rr -p 900 ipvsadm -a -t 192.168.21.100:80 -r 192.168.20.1 -m -w 100 ipvsadm -a -t 192.168.21.100:80 -r 192.168.20.2 -m -w 100 ipvsadm -a -t 192.168.21.100:80 -r 192.168.20.3 -m -w 100 On one of nodes, it works withou any problem. On other one, it is not working. Here is output from tcpdump (I am trying to connect to lvs on address 192.168.21.100 from server 192.168.21.10). r...@ucplb-second-node:~# tcpdump -ln host 192.168.21.10 tcpdump: verbose output suppressed, use -v or -vv for full protocol decode listening on eth0, link-type EN10MB (Ethernet), capture size 96 bytes 06:13:54.197763 arp who-has 192.168.21.100 tell 192.168.21.10 06:13:54.198226 arp reply 192.168.21.100 is-at 00:50:56:92:4d:a2 06:13:54.197809 IP 192.168.21.10.46204 > 192.168.21.100.80: S 3085705580:3085705580(0) win 5840 <mss 1460,sackOK,timestamp 1070655 0,nop,wscale 5> 06:13:54.197867 IP 192.168.21.10.46204 > 192.168.20.3.80: S 3085705580:3085705580(0) win 5840 <mss 1460,sackOK,timestamp 1070655 0,nop,wscale 5> 06:13:57.186597 IP 192.168.21.10.46204 > 192.168.21.100.80: S 3085705580:3085705580(0) win 5840 <mss 1460,sackOK,timestamp 1070955 0,nop,wscale 5> 06:13:57.186645 IP 192.168.21.10.46204 > 192.168.20.3.80: S 3085705580:3085705580(0) win 5840 <mss 1460,sackOK,timestamp 1070955 0,nop,wscale 5> 06:14:03.186451 IP 192.168.21.10.46204 > 192.168.21.100.80: S 3085705580:3085705580(0) win 5840 <mss 1460,sackOK,timestamp 1071555 0,nop,wscale 5> 06:14:03.186489 IP 192.168.21.10.46204 > 192.168.20.3.80: S 3085705580:3085705580(0) win 5840 <mss 1460,sackOK,timestamp 1071555 0,nop,wscale 5> Any idea what might cause the problem. I am very confused since I literally copied configuration from another node where it works. Any idea how to troubleshoot this ? Thank you in advance. Dusan _______________________________________________ Please read the documentation before posting - it's available at: http://www.linuxvirtualserver.org/ LinuxVirtualServer.org mailing list - [email protected] Send requests to [email protected] or go to http://lists.graemef.net/mailman/listinfo/lvs-users
