LVS_NAT+keepalived疑难问题
这个问题很简单，但花了我两天时间，郁闷
正文：
LVS_NAT配置可以参考这篇文件：http://www.linuxnotes.cn/?p=884
我LVS_NAT环境都搭建好了，测试也正常了，我就不贴具体配置了。现在主要是我想用KEEPALIVED来检测realserver是否正常。
lvs手动启动脚本：
1 2 3 4 5 6 7 | #!/bin/bash echo 1 > /proc/sys/net/ipv4/ip_forward LVSADM='/sbin/ipvsadm' $LVSADM -C $LVSADM -A -t 192.168.1.9:80 -s rr $LVSADM -a -t 192.168.1.9:80 -r 10.10.10.10:80 -m -w 1 $LVSADM -a -t 192.168.1.9:80 -r 10.10.10.11:80 -m -w 1 |
keepalived安装过程：
1 2 3 4 5 6 7 8 9 10 11 12 | [root@lb keepalived-1.1.19]# ./configure --prefix=/ --mandir=/usr/share/man Keepalived configuration ------------------------ Keepalived version : 1.1.19 Compiler : gcc Compiler flags : -g -O2 Extra Lib : -lpopt -lssl -lcrypto Use IPVS Framework : Yes IPVS sync daemon support : Yes Use VRRP Framework : Yes Use Debug flags : No [root@lb keepalived-1.1.19]# make && make install |
keepalived配置如下：
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 | global_defs { notification_email { acassen@firewall.loc } notification_email_from Alexandre.Cassen@firewall.loc smtp_server 192.168.200.1 smtp_connect_timeout 30 router_id LVS_DEVEL } virtual_server 192.168.1.9 80 { delay_loop 6 lb_algo rr lb_kind NAT nat_mask 255.255.255.0 persistence_timeout 20 protocol TCP real_server 10.10.10.10 80 { weight 1 HTTP_GET{ url{ path /index.html digest 9e60b98421b874661bdc7260aa1d6206 } connect_port 80 connect_timeout 3 } } real_server 10.10.10.11 80 { weight 1 HTTP_GET{ url{ path /index.html digest 9e60b98421b874661bdc7260aa1d6206 } connect_port 80 connect_timeout 3 } } } |
重启keepalived后
1 2 3 4 5 6 7 8 | /etc/init.d/keepalived start [root@lb keepalived]# ipvsadm -l IP Virtual Server version 1.2.1 (size=4096) Prot LocalAddress:Port Scheduler Flags -> RemoteAddress:Port Forward Weight ActiveConn InActConn TCP 192.168.1.9:http rr persistent 20 -> 10.10.10.10:http Masq 1 0 0 |
它只能检测到第一台realserver，且即使这台realserver 80端口关闭，keepalived也检测不出来，我用TCP_CHECK也试过，都是老样子，请各位高手指教。
故障解决：原因是因为keepalived的配置有问题，TCP_CHECK和后面的{符号中间的空格。很惭愧，被个空格折腾了两天。
再贴下日志文件：
[root@lb keepalived]# tail /var/log/messages -f
Mar 3 15:43:37 lb Keepalived_vrrp: Configuration is using : 32921 Bytes
Mar 3 15:43:37 lb Keepalived_vrrp: Using LinkWatch kernel netlink reflector…
Mar 3 15:44:38 lb Keepalived_healthcheckers: Error connecting server [10.10.10.11:80].
Mar 3 15:44:38 lb Keepalived_healthcheckers: Removing service [10.10.10.11:80] from VS [192.168.1.9:80]
Mar 3 15:44:38 lb Keepalived_healthcheckers: Remote SMTP server [192.168.200.1:25] connected.
Mar 3 15:45:02 lb Keepalived_healthcheckers: MD5 digest success to [10.10.10.11:80] url(1).
Mar 3 15:45:08 lb Keepalived_healthcheckers: Timeout reading data to remote SMTP server [192.168.200.1:25].
Mar 3 15:45:08 lb Keepalived_healthcheckers: Remote Web server [10.10.10.11:80] succeed on service.
Mar 3 15:45:08 lb Keepalived_healthcheckers: Adding service [10.10.10.11:80] to VS [192.168.1.9:80]
Mar 3 15:45:08 lb Keepalived_healthcheckers: Remote SMTP server [192.168.200.1:25] connected.
^[[AMar 3 15:45:38 lb Keepalived_healthcheckers: Timeout reading data to remote SMTP server [192.168.200.1:25].
Mar 3 15:49:45 lb Keepalived_healthcheckers: Error connecting server [10.10.10.11:80].
Mar 3 15:49:45 lb Keepalived_healthcheckers: Removing service [10.10.10.11:80] from VS [192.168.1.9:80]
Mar 3 15:49:45 lb Keepalived_healthcheckers: Remote SMTP server [192.168.200.1:25] connected.
Mar 3 15:49:57 lb Keepalived_healthcheckers: MD5 digest success to [10.10.10.11:80] url(1).
Mar 3 15:50:03 lb Keepalived_healthcheckers: Remote Web server [10.10.10.11:80] succeed on service.
Mar 3 15:50:03 lb Keepalived_healthcheckers: Adding service [10.10.10.11:80] to VS [192.168.1.9:80]
Mar 3 15:50:03 lb Keepalived_healthcheckers: Remote SMTP server [192.168.200.1:25] connected.
Mar 3 15:50:15 lb Keepalived_healthcheckers: Timeout reading data to remote SMTP server [192.168.200.1:25].
以上日志红色显示区域为realserver10.10.10.11 apache服务重启时生成的
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