三步安装完成nginx负载均衡设置

Nginx负载均衡器的优点许多,简单概括为:

①实现了可弹性化的架构,在压力增大的时候可以临时添加tomcat服务器添加到这个架构里面去;

②upstream具有负载均衡能力,可以自动判断下面的机器,并且自动踢出不能正常提供服务的机器;而Keepalvied可保证单个nginx负载均衡器的有效性,避免单点故障.

IP地址

nginx(主负载均衡器):192.168.1.106
nginx(从负载均衡器):192.168.1.107
VIP地址:192.168.1.108
tomcat1的IP:192.168.1.102
tomcat2的IP:192.168.1.103
tomcat3的IP:192.168.1.105

布置整个环境用到的软件为:

apache-tomcat-6.0.20.tar.gz
jdk-6u16-linux-i586.bin
nginx-0.7.17.tar.gz
prce-7.7.tar.gz

①首先分别在3台tomcat主机上布置java环境,安装tomcat,具体步骤为:

安装java环境:

JDK的安装
#chmod +x jdk-6u16-linux-i586.bin
#./jdk-6u16-linux-i586.bin
到此JDK已经安装完成
建立符号链接
# ln -s /usr/local/jdk-1.6.0-16/bin/java /usr/bin/java
# ln -s /usr/local/jdk-1.6.0-16/bin/javac /usr/bin/javac
ln -s /usr/local/jdk-1.6.0-16 /usr/local/jdk
ln -s /usr/local/jdk-1.6.0-16/jre /usr/local/jre
TOMCAT的安装
#tar zxvf apache-tomcat-6.0.20.tar.gz
#mv apache-tomcat-6.0.20 /usr/local/tomcat

设置环境变量: vim /etc/rc.d/rc.local,以追加的形式添加如下内容

JAVA_HOME=/usr/local/jdk
export JAVA_HOME
JRE_HOME=/usr/local/jre
export JRE_HOME
CLASSPATH=/usr/local/tomcat/common/lib/:/usr/local/jdk/lib:/usr/local/jre/lib
export CLASSPATH
PATH=$PATH:/usr/local/tomcat/bin/:/usr/local/apache/bin:/usr/local/jdk/bin:/usr/local/jre/bin
export PATH
TOMCAT_HOME=/usr/local/tomcat
export TOMCAT_HOME
重启服务器,启动tomcat以检查是否存在错误:
#cd /usr/local/tomcat/bin
#./startup.sh
http://IP地址:8080 可以看到猫头:)成功了｡ 3.通过nbproc多设置几个haproxy并发进程,这样每个进程的task_queue相对就会短很多,性能自然就能提高不少 #pidfile /var/run/haproxy-private.pid
defaults
log  global
mode http
optionhttplog
optiondontlognull
log 127.0.0.1 local3
retries 3
option redispatch
maxconn 2000
contimeout 5000
clitimeout 50000
srvtimeout 50000

listen webfarm 0.0.0.0:80
mode http
stats uri /haproxy-stats  #监控haproxy状态
stats realm Haproxy\ statistics
stats auth netseek:52netseek#设置状态监控的用户名为netseek密码为52netseek
balance roundrobin  #负载均衡算法
cookie SERVERID insert indirect
option httpclose #
option forwardfor#apache日志转发功能
option httpchk HEAD /check.txt HTTP/1.0#健康检测
server app_bbs1 192.168.169.117:80 cookie app1inst1 check inter 2000 rise 2 fall 5
server app_bbs2 192.168.169.118:80 cookie app1inst2 check inter 2000 rise 2 fall 5
syslog.conf里加一行
local3.*/var/log/haproxy.log
# touch /var/log/haproxy.log
# chown haproxy:haproxy /var/log/haproxy.log
# chmod u+x /var/log/haproxy.log
# tail –f /var/log/harpoxy.log 监控日志
# ./haproxy -f haproxy.cfg 启动服务.
监控状态图示http://192.168.169.137/haproxy-stats ,输入用户名密码查看状态｡