Nginx是一款很优秀的基于event的webserver。吞吐量大。占用资源少，只是文档就很让人郁闷了，免费的Nginx和收费的Nginx+的文档共用一份，配置完之后才发现免费的Nginx启动某些命令失败。。
。。。。很伤感。
在我们的系统中，一直使用httpd做前端的7层负载均衡，近期想转换到Nginx。学习了下怎么配置，留作纪念。另外nginx的配置须要操作系统參数(linux)也做一些优化才干达到更好的效果
1.设置server location
- location / {
- proxy_pass http://appservers/;
- #health_check interval=10 fails=3 passes=2; match=server_ok;
- }
2. 设置appservers相应的server，server地址。尝试次数。尝试时间间隔。负载算法
ip_hash来取代默认的rr方式，即能够将某clientIP的请求通过哈希算法定位到同一台后端webserver上。这样避免了session丢失。攻克了session问题
设定Nginx与server通信的尝试失败的次数。
在fail_timeout參数定义的时间段内，假设失败的次数达到此值，Nginx就觉得server不可用。
在下一个fail_timeout时间段，server不会再被尝试
- <strong>upstream appservers {
- ip_hash # for session persistence</strong>
- #least_conn default: round-robin
- #zone appservers 64k; nginx plus function
- <strong>server localhost:8080 max_fails=1 fail_timeout=30s;</strong>
- # nginx plus function route=node1;
- <strong>server localhost:9090 max_fails=1 fail_timeout=30s;</strong>
- # nginx plus function route=node2;
- #sticky route $route_cookie $route_uri;
- <strong> }</strong>
3. 性能调优參数 （以后补充）
nginx.conf配置
user nginx nginx; worker_processes 4; # == cpu core number, total nginx process: one master + all workers #error_log logs/error.log; #error_log logs/error.log notice; #error_log logs/error.log info; #pid logs/nginx.pid; #http://nginx.org/en/docs/ngx_core_module.html#worker_connections events { worker_connections 1024; # need to check os limitation here} http { #include mime.types; #default_type application/octet-stream; #log_format main '$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; access_log off; #sendfile on; #tcp_nopush on; #timeout #client_body_timeout 12; #client_header_timeout 12; #send_timeout 10; #keepalive_timeout 0; keepalive_timeout 65; gzip on; gzip_comp_level 2; gzip_min_length 1000; gzip_proxied expired no-cache no-store private auth; gzip_types text/plain application/x-javascript text/xml text/css application/xml; # 防止cache不足频繁读写文件，header cache一般不会大于1k。最小设置系统分页大小(getconf PAGESIZE) client_body_buffer_size 10K; client_header_buffer_size 4k; client_max_body_size 8m; large_client_header_buffers 2 4k; #http://nginx.com/resources/admin-guide/load-balancer/ #http://nginx.org/en/docs/http/ngx_http_upstream_module.html#upstream_conf upstream appservers { ip_hash; # for session persistence #least_conn default: round-robin #zone appservers 64k; nginx plus function server localhost:8080 max_fails=3 fail_timeout=30s; # nginx plus function route=node1; server localhost:9090 max_fails=3 fail_timeout=30s; # nginx plus function route=node2; #sticky route $route_cookie $route_uri; } #map $cookie_jsessionid $route_cookie { # ~.+\.(?P \w+)$ $route; #} #map $request_uri $route_uri { # ~jsessionid=.+\.(?P \w+)$ $route; #} #match server_ok { # status 200-399; # body !~ "maintenance mode"; #} server { location / { proxy_pass http://appservers/; #health_check interval=10 fails=3 passes=2; match=server_ok; } # Location for configuration requests #location /upstream_conf { # upstream_conf; # allow 127.0.0.1; # deny all; #} listen 80; server_name localhost; charset UTF-8; #access_log logs/host.access.log main; #location / { # root html; # index index.html index.htm; #} #error_page 404 /404.html; # redirect server error pages to the static page /50x.html # #error_page 500 502 503 504 /50x.html; #location = /50x.html { # root html; #} # proxy the PHP scripts to Apache listening on 127.0.0.1:80 # #location ~ \.php$ { # proxy_pass http://127.0.0.1; #} # 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 ssl; # server_name localhost; # ssl_certificate cert.pem; # ssl_certificate_key cert.key; # ssl_session_cache shared:SSL:1m; # ssl_session_timeout 5m; # ssl_ciphers HIGH:!aNULL:!MD5; # ssl_prefer_server_ciphers on; # location / { # root html; # index index.html index.htm; # } #} } PS： Nginx和Httpd都是很优秀的Webserver，两者的比較能够看