Tengine 反向代理状态检测,tengine代理
Tengine 反向代理状态检测,tengine代理
Tengine 反向代理状态检测安装Tengine:编译安装./configure --prefix=/usr/loca/nginxmake && make install配置upstream server:#user nobody;user nginx nginx;worker_processes 1;error_log logs/error.log crit;#error_log logs/error.log notice;#error_log logs/error.log info;#error_log "pipe:rollback logs/error_log interval=1d baknum=7 maxsize=2G";#pid logs/nginx.pid;events { worker_connections 1024;}# load modules compiled as Dynamic Shared Object (DSO)##dso {# load ngx_http_fastcgi_module.so;# load ngx_http_rewrite_module.so;#}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 "pipe:rollback logs/access_log interval=1d baknum=7 maxsize=2G" main; sendfile on; #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; #access_log "pipe:rollback logs/host.access_log interval=1d baknum=7 maxsize=2G" 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; # } #}upstream tomcat { ip_hash; server 192.168.137.201:8080; server 192.168.137.202:8080; check interval=3000 rise=2 fall=5 timeout=1000 type=http; check_http_send "HEAD / HTTP/1.0\r\n\r\n"; check_http_expect_alive http_2xx http_3xx; }upstream tomcat-1 { ip_hash; server 192.168.137.201:8081; server 192.168.137.202:8081; check interval=3000 rise=2 fall=5 timeout=1000 type=http; #状态检测 check_http_send "HEAD / HTTP/1.0\r\n\r\n"; check_http_expect_alive http_2xx http_3xx; }server { listen 80; server_name 127.0.0.1; index index.jsp index.html; location / { proxy_pass http://tomcat; #以这种格式来使用后端的web服务器 proxy_redirect off; proxy_set_header Host $host; proxy_set_header X-Real-IP $remote_addr; proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; client_max_body_size 10m; client_body_buffer_size 128k; proxy_connect_timeout 90; proxy_send_timeout 90; proxy_read_timeout 90; proxy_buffer_size 4k; proxy_buffers 4 32k; proxy_busy_buffers_size 64k; proxy_temp_file_write_size 64k; } #location /status { # check_status; # access_log off; #}# location /nginx_status {# stub_status on;# access_log off;# }}server { listen 8000; server_name 127.0.0.1; index index.jsp index.html; location / { proxy_pass http://tomcat-1; #以这种格式来使用后端的web服务器 proxy_redirect off; proxy_set_header Host $host; proxy_set_header X-Real-IP $remote_addr; proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; client_max_body_size 10m; client_body_buffer_size 128k; proxy_connect_timeout 90; proxy_send_timeout 90; proxy_read_timeout 90; proxy_buffer_size 4k; proxy_buffers 4 32k; proxy_busy_buffers_size 64k; proxy_temp_file_write_size 64k; }}include /usr/local/nginx/conf/vhosts/*.conf;}状态检测模块可以为Tengine提供主动式后端服务器健康检查的功能。该模块在Tengine-1.4.0版本以前没有默认开启,它可以在配置编译选项的时候开启:./configure --with-http_upstream_check_module编辑/etc/nginx/nginx.confhttp { upstream cluster1 { # simple round-robin server 192.168.30.116:80; #server 192.168.0.2:80; check interval=3000 rise=2 fall=5 timeout=1000 type=http; check_http_send "HEAD / HTTP/1.0\r\n\r\n"; check_http_expect_alive http_2xx http_3xx; } upstream cluster2 { # simple round-robin server 192.168.30.113:80; server 192.168.30.114:80; check interval=3000 rise=2 fall=5 timeout=1000 type=http; check_keepalive_requests 100; check_http_send "HEAD / HTTP/1.1\r\nConnection: keep-alive\r\n\r\n"; check_http_expect_alive http_2xx http_3xx; } server { listen 80; location /1 { proxy_pass http://cluster1; } location /2 { proxy_pass http://cluster2; } location /status { check_status; access_log off; allow SOME.IP.ADD.RESS; deny all; } }}指令后面的参数意义是:interval:向后端发送的健康检查包的间隔。fall(fall_count): 如果连续失败次数达到fall_count,服务器就被认为是down。rise(rise_count): 如果连续成功次数达到rise_count,服务器就被认为是up。timeout: 后端健康请求的超时时间。default_down: 设定初始时服务器的状态,如果是true,就说明默认是down的,如果是false,就是up的。默认值是true,也就是一开始服务器认为是不可用,要等健康检查包达到一定成功次数以后才会被认为是健康的。type:健康检查包的类型,现在支持以下多种类型tcp:简单的tcp连接,如果连接成功,就说明后端正常。ssl_hello:发送一个初始的SSL hello包并接受服务器的SSL hello包。http:发送HTTP请求,通过后端的回复包的状态来判断后端是否存活。mysql: 向mysql服务器连接,通过接收服务器的greeting包来判断后端是否存活。ajp:向后端发送AJP协议的Cping包,通过接收Cpong包来判断后端是否存活。port: 指定后端服务器的检查端口。你可以指定不同于真实服务的后端服务器的端口,比如后端提供的是443端口的应用,你可以去检查80端口的状态来判断后端健康状况。默认是0,表示跟后端server提供真实服务的端口一样。该选项出现于Tengine-1.4.0。check_http_send http_packet:该指令可以配置http健康检查包发送的请求内容。为了减少传输数据量,推荐采用"HEAD"方法。当采用长连接进行健康检查时,需在该指令中添加keep-alive请求头,如:"HEAD / HTTP/1.1\r\nConnection: keep-alive\r\n\r\n"。 同时,在采用"GET"方法的情况下,请求uri的size不宜过大,确保可以在1个interval内传输完成,否则会被健康检查模块视为后端服务器或网络异常。check_http_expect_alive: 该指令指定HTTP回复的成功状态,默认认为2XX和3XX的状态是健康的。check_status:显示服务器的健康状态页面。该指令需要在http块中配置。在Tengine-1.4.0以后,你可以配置显示页面的格式。支持的格式有: html、csv、 json。默认类型是html。
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