keepalived编译安装

Update: 2012-12-10

编译环境

CentOS 6.3
RedHat 6.0
CentOS 6.4源中已添加keepalived，直接用yum安装即可。

yum -y install unzip wget gcc autoconf automake make libtool pkgconfig glib2-devel \
    libxml2 libxml2-devel bzip2-devel libtool-ltdl-devel libuuid-devel libxslt-devel;
yum -y install ipvsadm kernel-devel;
yum -y install openssl openssl-devel popt-devel popt libnl libnl-devel;

keepalived编译安装

mkdir -p ~/down && cd ~/down \
&& wget http://www.keepalived.org/software/keepalived-1.2.7.tar.gz

cd ~/down \
&& tar zxvf keepalived-1.2.7.tar.gz \
&& cd keepalived-1.2.7 \
&& CFLAGS="-O3 -pipe" ./configure --sysconf=/etc --with-kernel-dir=/usr/src/kernels/$(uname -r) \
&& make && make install \
&& ln -sf /usr/local/sbin/keepalived /usr/sbin/keepalived

    Keepalived configuration
    ------------------------
    Keepalived version       : 1.2.7
    Compiler                 : gcc
    Compiler flags           : -O3 -pipe
    Extra Lib                : -lpopt -lssl -lcrypto  -lnl
    Use IPVS Framework       : Yes
    IPVS sync daemon support : Yes
    IPVS use libnl           : Yes
    Use VRRP Framework       : Yes
    Use VRRP VMAC            : Yes
    SNMP support             : No
    Use Debug flags          : No

keepalived配置

/etc/keepalived/keepalived.conf

keepalived启动

/etc/init.d/keepalived start|stop|restart

其他

arping

/sbin/arping -I eth0 -c 5 -s $WEB_VIP $GW

ifconfig可能看不到vip，用ip addr试试

LVS监控

引用：http://salogs.com

用ipvsadm命令

通常情况下lvs的运行情况以及资源使用情况是无法使用top或vmstat命令时来查看的。对于LVS-DR结构的LVS来说，其只会转发网络包。几乎不会耗费CPU资源，这时我们查看系统负载应该为0.00。

通过使用ipvsadm命令可以查看当前LVS的运行情况，如下：

[root@LVS-Master]# ipvsadm
Prot LocalAddress:Port Scheduler Flags
-> RemoteAddress:Port Forward Weight ActiveConn InActConn
TCP localhost:https wlc persistent 50
-> localhost:https Route 1 0 0
-> localhost:https Route 1 0 0
TCP localhost:http wlc persistent 50
-> localhost:http Route 1 0 0
-> localhost:http Route 3 0 0

当有新连接过来时，其相关的计数就会增加。

查看连接数/进入包（字节）/输出包（字节）：

命令：ipvsadm -Ln --stats -t |u|f service-address
-t, --tcp-service
-u, --udp-service
-f, --fwmark-service
-L, -l, --list List the virtual server table if no argument is specified.
-n, --numeric Numeric output.
--stats Output of statistics information.

示例：

[root@experiment ~]# ipvsadm -Ln --stats -t 192.168.108.180:80
Prot LocalAddress:Port Conns InPkts OutPkts InBytes OutBytes
-> RemoteAddress:Port
TCP 192.168.108.180:80 5771754 101697K 0 5338M 0
-> 192.168.108.162:80 454297 13736280 0 761572K 0
-> 192.168.108.161:80 5317457 87961304 0 4576M 0

另外通过查看cat /proc/net/ip_vs_stats 也可以查看lvs信息，只不过这里的输出时16进制的。

[root@LVS-Master] # cat /proc/net/ip_vs_stats
Total Incoming Outgoing         Incoming         Outgoing
Conns  Packets  Packets            Bytes            Bytes
594BFC  6335751        0        145F90EC1                0
Conns/s   Pkts/s   Pkts/s          Bytes/s          Bytes/s
0              0             0                     0                     0