下载：
安装编译：
keeepalived时需要支持LVS时才可以做LVS调度，执行./configure 出现下面情况，将不支持lvs！：
Keepalived configuration
------------------------
Keepalived version : 1.2.2
Compiler : gcc
Compiler flags : -g -O2 -DETHERTYPE_IPV6=0x86dd
Extra Lib : -lpopt -lssl -lcrypto
Use IPVS Framework : No
IPVS sync daemon support : No
Use VRRP Framework : Yes
Use Debug flags : No
原因：是keepalived需要kernelsource的支持。
解决办法：指定kernel目录（没有安装kernel-devel的同学，请自行安装匹配版本的kernel-devel包）：
./configure --with-kernel-dir=/usr/src/kernels/2.6.18-164.el5PAE-i686/ (rhel5.4_32平台）
正确情况：
Keepalived configuration
------------------------
Keepalived version : 1.2.2
Compiler : gcc
Compiler flags : -g -O2 -DETHERTYPE_IPV6=0x86dd
Extra Lib : -lpopt -lssl -lcrypto
Use IPVS Framework : Yes
IPVS sync daemon support : Yes
IPVS use libnl : No
Use VRRP Framework : Yes
Use Debug flags : No
然后在make，make install
编译过程出现的各种问题和解决方法：
1.
checking openssl/ssl.h usability... no
checking openssl/ssl.h presence... no
checking for openssl/ssl.h... no
configure: error:
!!! OpenSSL is not properly installed on your system. !!!
!!! Can not include OpenSSL headers files. !!!
解决方式：安装openssl-devel
2.
In file included from /usr/include/stdlib.h:438,
from ../../lib/memory.h:30,
from vrrp_arp.c:28:
/usr/include/sys/types.h:62: 错误：与 ‘dev_t’ 类型冲突
/usr/include/linux/types.h:13: 错误：‘dev_t’ 的上一个声明在此
/usr/include/sys/types.h:67: 错误：与 ‘gid_t’ 类型冲突
/usr/include/linux/types.h:27: 错误：‘gid_t’ 的上一个声明在此
/usr/include/sys/types.h:72: 错误：与 ‘mode_t’ 类型冲突
/usr/include/linux/types.h:15: 错误：‘mode_t’ 的上一个声明在此
/usr/include/sys/types.h:77: 错误：与 ‘nlink_t’ 类型冲突
/usr/include/linux/types.h:16: 错误：‘nlink_t’ 的上一个声明在此
/usr/include/sys/types.h:82: 错误：与 ‘uid_t’ 类型冲突
/usr/include/linux/types.h:26: 错误：‘uid_t’ 的上一个声明在此
In file included from /usr/include/sys/types.h:133,
from /usr/include/stdlib.h:438,
from ../../lib/memory.h:30,
from vrrp_arp.c:28:
/usr/include/time.h:105: 错误：与 ‘timer_t’ 类型冲突
/usr/include/linux/types.h:22: 错误：‘timer_t’ 的上一个声明在此
In file included from /usr/include/sys/types.h:220,
from /usr/include/stdlib.h:438,
from ../../lib/memory.h:30,
from vrrp_arp.c:28:
/usr/include/sys/select.h:78: 错误：与 ‘fd_set’ 类型冲突
/usr/include/linux/types.h:12: 错误：‘fd_set’ 的上一个声明在此
In file included from /usr/include/stdlib.h:438,
from ../../lib/memory.h:30,
from vrrp_arp.c:28:
/usr/include/sys/types.h:235: 错误：与 ‘blkcnt_t’ 类型冲突
/usr/include/linux/types.h:114: 错误：‘blkcnt_t’ 的上一个声明在此
解决方式：安装iptraf
3.
In file included from /usr/include/sys/uio.h:24,
from /usr/include/sys/socket.h:27,
from /usr/include/netinet/in.h:24,
from ip_vs.h:12,
from ip_vs_nl_policy.c:1:
/usr/include/sys/types.h:62: 错误：与 ‘dev_t’ 类型冲突
/usr/src/kernels/2.6.18-164.el5-i686//include/linux/types.h:22: 错误：‘dev_t’ 的上一个声明在此
/usr/include/sys/types.h:67: 错误：与 ‘gid_t’ 类型冲突
/usr/src/kernels/2.6.18-164.el5-i686//include/linux/types.h:54: 错误：‘gid_t’ 的上一个声明在此
/usr/include/sys/types.h:72: 错误：与 ‘mode_t’ 类型冲突
/usr/src/kernels/2.6.18-164.el5-i686//include/linux/types.h:24: 错误：‘mode_t’ 的上一个声明在此
/usr/include/sys/types.h:77: 错误：与 ‘nlink_t’ 类型冲突
/usr/src/kernels/2.6.18-164.el5-i686//include/linux/types.h:25: 错误：‘nlink_t’ 的上一个声明在此
/usr/include/sys/types.h:82: 错误：与 ‘uid_t’ 类型冲突
/usr/src/kernels/2.6.18-164.el5-i686//include/linux/types.h:53: 错误：‘uid_t’ 的上一个声明在此
In file included from /usr/include/sys/types.h:133,
from /usr/include/sys/uio.h:24,
from /usr/include/sys/socket.h:27,
from /usr/include/netinet/in.h:24,
from ip_vs.h:12,
from ip_vs_nl_policy.c:1:
/usr/include/time.h:105: 错误：与 ‘timer_t’ 类型冲突
/usr/src/kernels/2.6.18-164.el5-i686//include/linux/types.h:31: 错误：‘timer_t’ 的上一个声明在此
In file included from /usr/include/sys/types.h:220,
from /usr/include/sys/uio.h:24,
from /usr/include/sys/socket.h:27,
from /usr/include/netinet/in.h:24,
from ip_vs.h:12,
from ip_vs_nl_policy.c:1:
/usr/include/sys/select.h:78: 错误：与 ‘fd_set’ 类型冲突
/usr/src/kernels/2.6.18-164.el5-i686//include/linux/types.h:21: 错误：‘fd_set’ 的上一个声明在此
In file included from /usr/include/sys/uio.h:24,
from /usr/include/sys/socket.h:27,
from /usr/include/netinet/in.h:24,
from ip_vs.h:12,
from ip_vs_nl_policy.c:1:
/usr/include/sys/types.h:235: 错误：与 ‘blkcnt_t’ 类型冲突
/usr/src/kernels/2.6.18-164.el5-i686//include/linux/types.h:142: 错误：‘blkcnt_t’ 的上一个声明在此
解决方法：修改./keepalived/libipvs-2.6/ip_vs.h文件，将#include linux/types.h行移到#include sys/types.h行之后
服务脚本和配置文件的位置：
1.如果configure时不指定prefix，按默认路径安装，则：
启动命令位置：/usr/sbin/keepalived
服务脚本位置：/etc/init.d/keepalived
配置文件位置：/etc/keepalived/keepalived.conf
附加选项配置文件：/etc/sysconfig/keepalived
可执行此命令启动：/usr/sbin/keepalived -D -f /etc/keepalived/keepalived.conf
开机自启动可如下操作：
[root@localhost ~]# chkconfig --add keepalived
[root@localhost ~]# chkconfig --level 2345 keepalived on
2.如果configure时指定了prefix，如： --prefix=/opt/keepalived/，则：
启动命令位置：/opt/keepalived/sbin/keepalived
服务脚本位置：/opt/keepalived/etc/rc.d/init.d/keepalived
配置文件位置：/opt/keepalived/etc/keepalived/keepalived.conf
附加选项配置文件：/opt/keepalived/etc/sysconfig/keepalived
可执行此命令启动：/opt/keepalived/sbin/keepalived -D -f /opt/keepalived/etc/keepalived/keepalived.conf
开机自启动可如下操作：
[root@localhost ~]# cp /opt/keepalived/etc/rc.d/init.d/keepalived /etc/init.d/keepalived (注意该文件中关于配置文件和附加选项配置文件的位置定义)
[root@localhost ~]# chkconfig --add keepalived
[root@localhost ~]# chkconfig --level 2345 keepalived on
配置文件样例：(分发模式：DR，分配策略：lc，保持时间：180s)
! Configuration File for keepalived
global_defs {
# notification_email {
#
#
#
# }
# notification_email_from
# smtp_server 192.168.200.1
# smtp_connect_timeout 30
router_id LVS_DEVEL
}
vrrp_instance VI_1 {
state MASTER
interface eth0
virtual_router_id 51
priority 100
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
192.168.1.48
}
}
virtual_server 192.168.1.48 8080 {
delay_loop 6
lb_algo lc
lb_kind DR
persistence_timeout 180
protocol TCP
real_server 192.168.1.45 8080 {
weight 1
TCP_CHECK {
connect_timeout 3
nb_get_retry 3
delay_before_retry 3
connect_port 8080
}
}
real_server 192.168.1.46 8080 {
weight 1
TCP_CHECK {
connect_timeout 3
nb_get_retry 3
delay_before_retry 3
connect_port 8080
}
}
}
日志：
/var/log/messages
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