nginx+keepalived+proxy_cache 配置高可用nginx群集和高速缓存

环境： CentOS release 5.8 192.168.10.108 cat CentOS release 5.5 912.168.200.208 主调度器：192.168.10.108 192.169.10.251 备调度器：192.168.200.208 192.168.200.148 real ip : 192.169.10.251 192.168.200.148 vip : 192.168.10.104   一、在主备服务器上部署nginx 1、下载 wget http://nginx.org/download/nginx-1.0.11.tar.gz wget http://labs.frickle.com/files/ngx_cache_purge-1.4.tar.gz   2、安装 yum -y install zlib-devel pcre-devel openssl-devel  # 安装依赖 tar –xvf ngx_cache_purge-1.4.tar.gz tar –xvf nginx-1.0.11.tar.gz cd nginx-1.0.11/ ./configure --prefix=/usr/local/nginx --add-module=../ngx_cache_purge-1.4 --with-http_stub_status_module --with-http_ssl_module --with-http_flv_module --with-http_gzip_static_module Make && make install   vi /usr/local/nginx/conf/nginx.conf user nobody; worker_processes 8; #error_log logs/error.log error; error_log /data/logs/error.log crit; #error_log logs/error.log notice; #error_log logs/error.log info; #pid logs/nginx.pid; events { worker_connections 1024; } http { include mime.types; default_type application/octet-stream; charset utf-8; server_names_hash_bucket_size 128; client_header_buffer_size 32k; large_client_header_buffers 4 32k; client_max_body_size 300m; tcp_nopush on; tcp_nodelay on; client_body_buffer_size 512k; proxy_connect_timeout 5; proxy_read_timeout 60; proxy_send_timeout 5; proxy_buffer_size 16k; proxy_buffers 4 64k; proxy_busy_buffers_size 128k; proxy_temp_file_write_size 128k; #log_format main '$remote_addr - $remote_user [$time_local] "$request" ' # '$status $body_bytes_sent "$http_referer" ' # '"$http_user_agent" "$http_x_forwarded_for"'; #access_log logs/access.log main; sendfile on; #keepalive_timeout 65; gzip on; gzip_min_length 1k; gzip_buffers 4 16k; gzip_http_version 1.1; gzip_comp_level 2; gzip_types text/plain application/x-javascript text/css application/xml; gzip_vary on; proxy_temp_path /data/proxy_temp_dir; proxy_cache_path /data/proxy_cache_dir levels=1:2 keys_zone=cache_one:50m inactive=1m max_size=2g; upstream real_server_pool{ server 192.168.200.148:80 weight=1 max_fails=2 fail_timeout=30s; server 192.168.10.251:80 weight=1 max_fails=2 fail_timeout=30s; } #tcp_nopush on; #keepalive_timeout 0; keepalive_timeout 65; #gzip on; server { listen 80; server_name localhost; #charset koi8-r; #access_log logs/host.access.log main; location / { root html; index index.html index.htm; proxy_next_upstream http_502 http_504 error timeout invalid_header; proxy_cache cache_one; proxy_cache_valid 200 304 12h; proxy_cache_key $host$uri$is_args$args; proxy_set_header Host $host; proxy_set_header X-Forwarded-For $remote_addr; proxy_pass http://real_server_pool; expires 1d;   } #error_page 404 /404.html; # redirect server error pages to the static page /50x.html # error_page 500 502 503 504 /50x.html; location = /50x.html { root html; } # proxy the PHP scripts to Apache listening on 127.0.0.1:80 # #location ~ \.php$ { # proxy_pass http://127.0.0.1; #} location ~ .*\.(php|jsp|cgi)?$ { proxy_set_header Host $host; proxy_set_header X-Forwarded-For $remote_addr; proxy_pass http://real_server_pool; } log_format access '$remote_addr - $remote_user [$time_local] "$request"' '$status $body_bytes_sent "$http_referer" ' '"$http_user_agent" $http_x_forwarded_for'; access_log /data/logs/access.log access; }   # pass the PHP scripts to FastCGI server listening on 127.0.0.1:9000 # #location ~ \.php$ { # root html; # fastcgi_pass 127.0.0.1:9000; # fastcgi_index index.php; # fastcgi_param SCRIPT_FILENAME /scripts$fastcgi_script_name; # include fastcgi_params; #} # deny access to .htaccess files, if Apache's document root # concurs with nginx's one # #location ~ /\.ht { # deny all; #} } # another virtual host using mix of IP-, name-, and port-based configuration # #server { # listen 8000; # listen somename:8080; # server_name somename alias another.alias; # location / { # root html; # index index.html index.htm; # } #} # HTTPS server # #server { # listen 443; # server_name localhost; # ssl on; # ssl_certificate cert.pem; # ssl_certificate_key cert.key; # ssl_session_timeout 5m; # ssl_protocols SSLv2 SSLv3 TLSv1; # ssl_ciphers HIGH:!aNULL:!MD5; # ssl_prefer_server_ciphers on; # location / { # root html; # index index.html index.htm; # } #}   备用调度器的nginx配置文件和主调度器的配置文件一样。 启动nginx /usr/local/nginx/sbin/nginx   二、安装keepalived（在nginx的mater和backup都安装）   1、  下载 wget http://www.keepalived.org/software/keepalived-1.1.19.tar.gz   2、  安装 tar zxvf keepalived-1.1.19.tar.gz cd keepalived-1.1.19 ./configure --prefix=/usr/local/keepalived make make install cp /usr/local/keepalived/sbin/keepalived /usr/sbin/ cp /usr/local/keepalived/etc/sysconfig/keepalived /etc/sysconfig/ cp /usr/local/keepalived/etc/rc.d/init.d/keepalived /etc/init.d/ mkdir /etc/keepalived   vi /etc/keepalived/keepalived.conf vrrp_instance VI_INET1 { state MASTER interface eth0 virtual_router_id 53 priority 100 advert_int 1 authentication { auth_type pass auth_pass 1111 } virtual_ipaddress { 192.168.10.104/24 } } virtual_server 192.168.10.104 80 { delay_loop 6 lb_algo rr lb_kind NAT nat_mask 255.255.255.0 persistence_timeout 50 protocol TCP real_server 192.168.10.251 80 { weight 3 TCP_CHECK { connect_timeout 10 nb_get_retry 3 delay_before_retry 3 connect_port 80 } } real_server 192.168.200.148 80 { weight 3 TCP_CHECK { connect_timeout 10 nb_get_retry 3 delay_before_retry 3 connect_port 80 } } } 4、配置备用调度器的keepalived,只需要将state MASTER 改为state BACKUP,降低priority 100 的值: state MASTER ---> state BACKUP priority 100 --->  priority 99 （此值必须低于主的） 主备启动 /etc/init.d/keepalived start   三、测试 建立虚拟主机（自己测试啊    O(∩_∩)O~）