三步安裝完成nginx負載均衡設置

Nginx負載均衡器的優點許多,簡單概括爲:

①實現了可彈性化的架構,在壓力增大的時候可以臨時添加tomcat服務器添加到這個架構裏面去;

②upstream具有負載均衡能力,可以自動判斷下面的機器,並且自動踢出不能正常提供服務的機器;而Keepalvied可保證單個nginx負載均衡器的有效性,避免單點故障.

IP地址

nginx(主負載均衡器):192.168.1.106
nginx(從負載均衡器):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

佈置整個環境用到的軟件爲:

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

①首先分別在3臺tomcat主機上佈置java環境,安裝tomcat,具體步驟爲:

安裝java環境:

JDK的安裝
#chmod +x jdk-6u16-linux-i586.bin
#./jdk-6u16-linux-i586.bin
到此JDK已經安裝完成
建立符號鏈接
# 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的安裝
#tar zxvf apache-tomcat-6.0.20.tar.gz
#mv apache-tomcat-6.0.20 /usr/local/tomcat

設置環境變量: vim /etc/rc.d/rc.local,以追加的形式添加如下內容

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
重啓服務器,啓動tomcat以檢查是否存在錯誤:
#cd /usr/local/tomcat/bin
#./startup.sh
http://IP地址:8080 可以看到貓頭:)成功了｡ 3.通過nbproc多設置幾個haproxy併發進程,這樣每個進程的task_queue相對就會短很多,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  #監控haproxy狀態
stats realm Haproxy\ statistics
stats auth netseek:52netseek#設置狀態監控的用戶名爲netseek密碼爲52netseek
balance roundrobin  #負載均衡算法
cookie SERVERID insert indirect
option httpclose #
option forwardfor#apache日誌轉發功能
option httpchk HEAD /check.txt HTTP/1.0#健康檢測
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 監控日誌
# ./haproxy -f haproxy.cfg 啓動服務.
監控狀態圖示http://192.168.169.137/haproxy-stats ,輸入用戶名密碼查看狀態｡