nginx+keepalived高可用web架构
1、下载所需的软件包
（1）、keepalived软件包 keepalived-1.1.20.tar.gz （2）、nginx软件包 nginx-1.1.6.tar.gz （3）、nginx模块软件包 libunwind-0.99.tar.gz agentzh-encrypted-session-nginx-module-v0.02-0-gc752861.tar.gz chunkin-nginx-module-0.23rc2.tar.gz google-perftools-1.8.3.tar.gz pcre-8.11.tar.gz simpl-ngx_devel_kit-v0.2.17-10-g4192ba6.tar.gz
2、安装脚本
#!/bin/bash # # # this is install nginx # # keepalived_dir=/usr/local/keepalived tar_dir=/usr/src kernel=$(uname -r) software_dir=/root/software cd $software_dir yum install gcc gcc-c++ autoconf automake wget openssl-devel kernel-devel pcre-devel zlib-devel -y echo "tar and mv nginx module" tar -zxf agentzh-encrypted-session-nginx-module-v0.02-0-gc752861.tar.gz mv agentzh-encrypted-session-nginx-module-c752861 encrypted-session-nginx-module tar -zxf chunkin-nginx-module-0.23rc2.tar.gz mv chunkin-nginx-module-0.23rc2 chunkin-nginx-module tar -zxf simpl-ngx_devel_kit-v0.2.17-10-g4192ba6.tar.gz mv simpl-ngx_devel_kit-4192ba6 ngx_devel_kit echo "configure and install pcre" tar zxf pcre-8.11.tar.gz cd pcre-8.11 make clean ./configure make && make install echo "configure and install google-perftools use" cd $software_dir tar -zxf libunwind-0.99.tar.gz cd libunwind-0.99 make clean ./configure CFLAGS=-fPIC make CFLAGS=-fPIC make install CFLAGS=-fPIC echo "configure and install google-perftools" cd $software_dir tar zxf google-perftools-1.8.3.tar.gz cd google-perftools-1.8.3 ./configure --enable-frame-pointers #64 make -j 4 && make install ln -s /usr/local/lib/libprofiler.so.0 /lib/ ln -s /usr/local/lib/libprofiler.so.0 /usr/lib ln -s /usr/local/lib/libprofiler.so.0 /lib64 ln -s /usr/local/lib/libprofiler.so.0 /usr/lib64 ln -s /usr/local/lib/libunwind.so.7 /lib/ ln -s /usr/local/lib/libunwind.so.7 /usr/lib ln -s /usr/local/lib/libunwind.so.7 /lib64 ln -s /usr/local/lib/libunwind.so.7 /usr/lib64 echo "configure and install nginx" cd $software_dir tar -zxf nginx-1.1.6.tar.gz cd nginx-1.1.6 make clean ./configure --prefix=/usr/local/nginx --user=www --group=www --with-http_ssl_module --with-file-aio --with-http_stub_status_module --with-http_sub_module --with-http_addition_module --with-http_random_index_module --with-http_secure_link_module --with-http_dav_module --with-http_mp4_module --with-http_degradation_module --with-http_gzip_static_module --with-google_perftools_module --with-http_flv_module --add-module=/root/software/chunkin-nginx-module --add-module=/root/software/ngx_devel_kit/ --add-module=/root/software/encrypted-session-nginx-module --with-pcre make && make install cd $software_dir useradd www #or configure nginx.conf nobody /usr/local/nginx/sbin/nginx #启动nginx # # #this is for install keepalived bash # # cd $software_dir tar -zxf keepalived-*.tar.gz -C $tar_dir cd /usr/src/keepalived-* ./configure --prefix=$keepalived_dir --sysconf=/etc --with-kernel-dir=/usr/src/kernels/$kernel* make && make install cp /usr/local/keepalived/sbin/keepalived /usr/sbin cp /usr/local/keepalived/bin/genhash /usr/sbin/ /etc/init.d/keepalived restart
3、keepalived配置文件
! Configuration File for keepalived
global_defs {
notification_email {
mds@cdpc.com
}
notification_email_from master@cdpc.com
smtp_server 127.0.0.1
smtp_connect_timeout 30
router_id httpd
}
vrrp_script check_http {
script "/root/bash/check_httpd.sh"
weight -5
interval 1
}
vrrp_instance VI_1 {
state BACKUP
interface eth0
virtual_router_id 240
priority 98
advert_int 1
track_script {
check_http
}
authentication {
auth_type PASS
auth_pass 3333
}
virtual_ipaddress {
192.168.80.200/24 dev eth0
}
}4、check_httpd.sh监测脚本
#!/bin/bash
CHECK_TIME=2
check()
{
curl http://127.0.0.1/ >/dev/null 2>&1
ret=$?
if [ $ret -ne 0 ];then
return $ret;
fi
}
while [ $CHECK_TIME -ne 0 ]
do
let "CHECK_TIME -= 1"
check
HTTP_OK=$?
if [ $HTTP_OK -eq 0 ];then
exit 0
fi
if [ $HTTP_OK -ne 0 ] && [ $CHECK_TIME -eq 0 ]
then
exit 1
fi
done
