jgarcia at pricewin
Sep 6, 2007, 8:19 AM
Post #1 of 4
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[lvs-users] problems with hc-ha-lb architecture
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Hello,
I have this architecture:
2 fronteds with Debian 4.0
2 backends with CentOS 5.0
2 lb with CentOS 5.0
I balance a MySQL service running in backend servers. With a MySQL
client in frontends, I can connect to backend trought lb process
without problems. The lb backup server, don't have problems to connect
via VIP address with the same MySQL client.
My problem is with lb master server, I cannot use VIP address by connect
to db backend:
ss2:~# ipvsadm -L -n
IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddress:Port Scheduler Flags
-> RemoteAddress:Port Forward Weight ActiveConn InActConn
TCP 172.16.17.11:3306 wrr
-> 172.16.17.9:3306 Route 1 0 0
-> 172.16.17.8:3306 Route 1 0 0
ss2:~# mysql -h 172.16.17.11 -u email -p
Enter password:
ERROR 2003 (HY000): Can't connect to MySQL server on
'172.16.17.11' (111)
ss2:~# mysql -h 172.16.17.9 -u email -p
Enter password:
Welcome to the MySQL monitor. Commands end with ; or \g.
[...]
ss2:~# ip addr
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast
qlen 1000
link/ether 00:30:05:fb:61:cd brd ff:ff:ff:ff:ff:ff
inet 172.16.17.7/27 brd 172.16.17.31 scope global eth0
inet 172.16.17.11/27 brd 172.16.17.31 scope global secondary eth0
inet6 fe80::230:5ff:fefb:61cd/64 scope link
valid_lft forever preferred_lft forever
4: sit0: <NOARP> mtu 1480 qdisc noop
link/sit 0.0.0.0 brd 0.0.0.0
ss2:~# route -n
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use
Iface
172.16.17.0 0.0.0.0 255.255.255.224 U 0 0 0
eth0
169.254.0.0 0.0.0.0 255.255.0.0 U 0 0 0
eth0
0.0.0.0 172.16.17.1 0.0.0.0 UG 0 0 0
eth0
I follow this doc:
http://www.ultramonkey.org/3/topologies/hc-ha-lb-eg.html
Any ideas?
Thanks
Jordi
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