Heartbeat学习笔记--HA高可用集群实现
# /etc/init.d/heartbeat startStarting High-Availability services: INFO:Resource is stopped
INFO:Resource is stopped
Done.
# ip add|grep 192.168.3 # 发现VIP已经绑定
inet 192.168.3.23/24 brd 192.168.3.255 scope global eth1
inet 192.168.3.30/24 brd 192.168.3.255 scope global secondary eth1
# iptables -vL # 看到udp端口已经有心跳流量了
Chain INPUT (policy ACCEPT 0 packets, 0 bytes)
pkts bytes target prot opt in out source destination
48 12296 ACCEPT udp--any any anywhere anywhere udp dpt:ha-cluster
362376 ACCEPT all--any any anywhere anywhere state RELATED,ESTABLISHED
0 0 ACCEPT icmp --any any anywhere anywhere
0 0 ACCEPT all--lo any anywhere anywhere
0 0 ACCEPT tcp--any any anywhere anywhere state NEW tcp dpt:ssh
1 229 REJECT all--any any anywhere anywhere reject-with icmp-host-prohibited
# tcpdump -i eth2 udp -s 1500 # 对心跳线所在网卡udp端口抓包的话可以看到心跳流量
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on eth2, link-type EN10MB (Ethernet), capture size 1500 bytes
16:55:16.399325 IP 192.168.5.23.35912 > 225.0.0.1.ha-cluster: UDP, length 226
16:55:17.216819 IP 192.168.5.24.53014 > 225.0.0.1.ha-cluster: UDP, length 226
16:55:17.371805 IP 192.168.5.23.35912 > 225.0.0.1.ha-cluster: UDP, length 239
16:55:18.399199 IP 192.168.5.23.35912 > 225.0.0.1.ha-cluster: UDP, length 226
16:55:19.222381 IP 192.168.5.24.53014 > 225.0.0.1.ha-cluster: UDP, length 226
...
^C
16 packets captured
16 packets received by filter
0 packets dropped by kernel
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