我正在学习使用keepalived; 现在在一台机器内 – 只是为了确保转发工作。
我开始在192.168.56.200:8080上侦听一个模拟networking服务器。 它只是回复主机名。
$ curl http://192.168.56.200:8080/ controller-1 现在我configuration了keepalived（/etc/keepalived/keepalived.conf）：
virtual_server 192.168.111.1 8082 { delay_loop 30 lb_algo rr lb_kind DR persistence_timeout 50 protocol TCP real_server 192.168.56.200 8080 { weight 1 TCP_CHECK { } } } vrrp_instance VI_1 { state MASTER interface eth0 virtual_router_id 1 priority 100 virtual_ipaddress { 192.168.111.1/24 } }
但是，似乎并不奏效。
$ curl http://192.168.111.1:8082/ curl: (7) couldn't connect to host $ telnet 192.168.111.1 8082 Trying 192.168.111.1... telnet: Unable to connect to remote host: Connection refused
实际上，根据netstat -apn | grep 8082，没有人在8082端口上收听，尽pipekeepalived可能应该。
我的configuration有什么问题？
一些更有用的信息：
$ ip a ... 2: eth0: <BROADCAST,MULTICAST,PROMISC,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000 link/ether 08:00:27:4e:4b:c6 brd ff:ff:ff:ff:ff:ff inet 192.168.111.1/24 scope global eth0 inet6 fe80::a00:27ff:fe4e:4bc6/64 scope link valid_lft forever preferred_lft forever 3: eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UNKNOWN qlen 1000 link/ether 08:00:27:9d:c4:b0 brd ff:ff:ff:ff:ff:ff inet 192.168.56.200/24 scope global eth1 inet6 fe80::a00:27ff:fe9d:c4b0/64 scope link valid_lft forever preferred_lft forever
和syslog：
Aug 10 22:58:36 controller-1 Keepalived: Starting Keepalived v1.2.2 (12/23,2011) Aug 10 22:58:36 controller-1 Keepalived: Starting Healthcheck child process, pid=5257 Aug 10 22:58:36 controller-1 Keepalived: Starting VRRP child process, pid=5258 Aug 10 22:58:36 controller-1 Keepalived_healthcheckers: Initializing ipvs 2.6 Aug 10 22:58:36 controller-1 Keepalived_healthcheckers: Registering Kernel netlink reflector Aug 10 22:58:36 controller-1 Keepalived_healthcheckers: Registering Kernel netlink command channel Aug 10 22:58:36 controller-1 Keepalived_healthcheckers: Opening file '/etc/keepalived/keepalived.conf'. Aug 10 22:58:36 controller-1 Keepalived_healthcheckers: Configuration is using : 8775 Bytes Aug 10 22:58:36 controller-1 Keepalived_vrrp: Registering Kernel netlink reflector Aug 10 22:58:36 controller-1 Keepalived_vrrp: Registering Kernel netlink command channel Aug 10 22:58:36 controller-1 Keepalived_vrrp: Registering gratutious ARP shared channel Aug 10 22:58:36 controller-1 Keepalived_vrrp: Initializing ipvs 2.6 Aug 10 22:58:36 controller-1 Keepalived_vrrp: Opening file '/etc/keepalived/keepalived.conf'. Aug 10 22:58:36 controller-1 Keepalived_vrrp: Configuration is using : 59356 Bytes Aug 10 22:58:36 controller-1 Keepalived_vrrp: Using LinkWatch kernel netlink reflector... Aug 10 22:58:36 controller-1 Keepalived_healthcheckers: Using LinkWatch kernel netlink reflector... Aug 10 22:58:36 controller-1 Keepalived_healthcheckers: Activating healtchecker for service [192.168.56.200]:8080 Aug 10 22:58:37 controller-1 ntpd[1318]: Deleting interface #22 eth0, 192.168.111.1#123, interface stats: received=0, sent=0, dropped=0, active_time=76 secs Aug 10 22:58:37 controller-1 ntpd[1318]: peers refreshed Aug 10 22:58:37 controller-1 Keepalived_vrrp: VRRP_Instance(VI_1) Transition to MASTER STATE Aug 10 22:58:38 controller-1 Keepalived_vrrp: VRRP_Instance(VI_1) Entering MASTER STATE Aug 10 22:58:38 controller-1 avahi-daemon[775]: Joining mDNS multicast group on interface eth0.IPv4 with address 192.168.111.1. Aug 10 22:58:38 controller-1 avahi-daemon[775]: New relevant interface eth0.IPv4 for mDNS. Aug 10 22:58:38 controller-1 avahi-daemon[775]: Registering new address record for 192.168.111.1 on eth0.IPv4. Aug 10 22:58:40 controller-1 ntpd[1318]: Listen normally on 23 eth0 192.168.111.1 UDP 123 Aug 10 22:58:40 controller-1 ntpd[1318]: peers refreshed Aug 10 22:58:40 controller-1 ntpd[1318]: new interface(s) found: waking up resolver Aug 10 22:58:42 controller-1 ntpd_intres[1320]: host name not found: 0.ubuntu.pool.ntp.org Aug 10 22:58:42 controller-1 ntpd_intres[1320]: host name not found: 1.ubuntu.pool.ntp.org Aug 10 22:58:42 controller-1 ntpd_intres[1320]: host name not found: 2.ubuntu.pool.ntp.org Aug 10 22:58:42 controller-1 ntpd_intres[1320]: host name not found: 3.ubuntu.pool.ntp.org Aug 10 22:58:42 controller-1 ntpd_intres[1320]: host name not found: ntp.ubuntu.com
在sysctl中，启用了ip_forward和ip_nonlocal_bind。
您的服务器应用程序需要在0.0.0.0:8080上进行监听，而不是在192.168.56.200:8080上进行监听。
使用此来validation服务器正在侦听的位置：
netstat -nlta | grep 8080
你可能会发现这个：
tcp 0 0 192.168.56.200:8080 0.0.0.0:* LISTEN
这表明服务正在该地址上显式侦听，而不是系统上可能configuration的任何其他地址。 您也可以使用notify_指令来指示状态更改时的活动（例如，重新启动服务以使其知道新的IP地址）。
notify_master "/etc/init.d/service start" notify_backup "/etc/init.d/service stop" notify_fault "/etc/init.d/service stop"