我有两个系统,都是VM.配置为使用桥接网络.我正在努力获得管理VIP的所有权 – 10.190.1.230.我已经尝试了两个版本的keepalived-1.2.2和keepalived-1.2.1,从源代码构建.
ServerA - RHEL5.2 x64 - 10.190.1.228 - PRIORITY 50 ServerB - RHEL6 x64 - 10.190.1.229 - PRIORITY 101 VIP - 10.190.1.230
我的问题似乎是在服务器B上没有发送多播广告.它正在看多播广告.来自ServerA：
[root@ServerB~]# tcpdump -vv -c 3 -i eth0 vrrp tcpdump: listening on eth0,link-type EN10MB (Ethernet),capture size 65535 bytes 10:18:10.760577 IP (tos 0x0,ttl 255,id 856,offset 0,flags [none],proto VRRP (112),length 40) 10.190.1.228 > 224.0.0.18: VRRPv2,Advertisement,vrid 151,prio 50,authtype none,intvl 1s,length 20,addrs: 10.190.1.230 10:18:11.762039 IP (tos 0x0,id 857,addrs: 10.190.1.230 10:18:12.762883 IP (tos 0x0,id 858,addrs: 10.190.1.230 3 packets captured 3 packets received by filter 0 packets dropped by kernel [root@ServerB~]#
如果我在ServerA上杀死keepalived,并保持tcpdump运行,我看不到数据包.我使用以下简单的keepalived配置：
服务器A – 10.190.1.228
vrrp_instance VI_1 {
interface eth0
state BACKUP
virtual_router_id 151
priority 50
virtual_ipaddress {
10.190.1.230
}
}
服务器B – 10.190.1.229
vrrp_instance VI_1 {
interface eth0
state MASTER
virtual_router_id 151
priority 100
virtual_ipaddress {
10.190.1.230
}
}
正确的我认为ServerA看到,因为它看不到ServerB上优先级较高的VRRPv2广告,正在举行VIP：
[root@ServerA~]# ip add sh eth0 2: eth0: <broADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast qlen 1000 link/ether 08:00:27:59:58:c0 brd ff:ff:ff:ff:ff:ff inet 10.190.1.228/24 brd 10.190.1.255 scope global eth0 inet 10.190.1.230/32 scope global eth0 inet6 fe80::a00:27ff:fe59:58c0/64 scope link valid_lft forever preferred_lft forever [root@ServerA~]#
网络配置
两台计算机上都禁用了防火墙.两个接口都设置了MULTICAST标志.
我使用iperf发布到VRRP组：
[root@ServerB~]# iperf -u -c 224.0.0.18 ------------------------------------------------------------ Client connecting to 224.0.0.18,UDP port 5001 Sending 1470 byte datagrams Setting multicast TTL to 1 UDP buffer size: 122 KByte (default) ------------------------------------------------------------ [ 3] local 10.190.1.229 port 32929 connected with 224.0.0.18 port 5001 ^C[ ID] Interval Transfer Bandwidth [ 3] 0.0- 0.6 sec 73.2 KBytes 1.05 Mbits/sec [ 3] Sent 51 datagrams [root@ServerB~]#
ServerA可以看到此流量：
[root@ServerA~]# tcpdump -c 3 -i eth0 host 224.0.0.18 tcpdump: verbose output suppressed,use -v or -vv for full protocol decode listening on eth0,capture size 96 bytes 10:37:30.460427 IP 10.190.1.229.33088 > vrrp.mcast.net.commplex-link: UDP,length 1470 10:37:30.472247 IP 10.190.1.229.33088 > vrrp.mcast.net.commplex-link: UDP,length 1470 10:37:30.482908 IP 10.190.1.229.33088 > vrrp.mcast.net.commplex-link: UDP,length 1470 3 packets captured 10 packets received by filter 0 packets dropped by kernel [root@ServerA~]#
以上会让我觉得这不是一个网络问题.我在路由表中没有mutlicast路由,但上面的建议我不需要一个.多播流量使用eth0.
最后,这是从ServerB上的keepalived注销：
May 18 10:40:46 ServerB Keepalived: Starting Keepalived v1.2.1 (05/17,2011) May 18 10:40:46 ServerB Keepalived: Remove a zombie pid file /var/run/keepalived.pid May 18 10:40:46 ServerB Keepalived: Registering Kernel netlink reflector May 18 10:40:46 ServerB Keepalived: Registering Kernel netlink command channel May 18 10:40:46 ServerB Keepalived: Registering gratutIoUs ARP shared channel May 18 10:40:46 ServerB Keepalived: Configuration is using : 55219 Bytes May 18 10:40:46 ServerB Keepalived: Using LinkWatch kernel netlink reflector...
我没有使用-D开关运行它,这似乎是内存调试,对我来说意义不大.我已经将strace输出上传到here.
当我使用-n标志进行keepalived(不要fork)时,在上面链接的输出后得到以下输出：
sendto(3,"<30>May 18 10:58:50 Keepalived: "...,68,MSG_NOSIGNAL,NULL,0) = 68
sendto(3,75,0) = 75
rt_sigaction(SIGCHLD,{0x411b60,[],SA_RESTORER|SA_RESTART,0x3db5a32a20},{SIG_DFL,0},8) = 0
select(1024,[4 6],{1,0}) = 0 (Timeout)
select(1024,0}) = 0 (Timeout)
[ etc ..]
这与在ServerA上工作keepalived的strace输出形成对比,在该输出中我可以看到正在进行的sendto(),sendmdg()和recmsg()调用.
解决方法
原文地址：https://www.jb51.cc/linux/397717.html
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