一、用户对动态PHP网页访问过程
用户浏览器发起对网页的访问：http://*.*.*.*/index.php
用户和nginx服务器进行三次握手进行TCP连接（忽略包括nginx访问控制策略、nginx防火墙等访问控制策略）
第一步：用户将http请求发送给nginx服务器
第二步：nginx会根据用户访问的URI和后缀对请求进行判断
1、例如用户访问的index.php，nginx则会根据配置文件中的location进行匹配，例如：
server { root /home/work/blog/; index index.html index.htm; server_name www.xxx.com; location / { try_files $uri $uri/ /index.html; } location /blog/ { #alias /usr/share/doc/; auth_basic "authorized users only"; auth_basic_user_file /etc/nginx/passwd.conf; #autoindex on; allow *.*.*.*; deny all; } location ~ \.php$ { include /etc/nginx/fastcgi_params; fastcgi_intercept_errors on; fastcgi_pass 127.0.0.1:9000; } }用户访问的是index.php，则会匹配到location～.php$，这个的含义是对用户通过URI访问的资源进行区分大小的匹配，并且访问的资源是以.php结尾的。
nginx根据用户请求的资源匹配到具体的location后，会执行location对应的动作，location中动作的含义是：
include/etc/nginx/fastcgi_params; #表示nginx会调用fastcgi这个接口
fastcgi_intercept_errors on; #表示开启fastcgi的中断和错误信息记录
fastcgi_pass 127.0.0.1:9000; #表示nginx通过fastcgi_pass将用户请求的资源发给127.0.0.1:9000进行解析，这里的nginx和php脚本解析服务器是在同一台机器上，所以127.0.0.1:9000表示的就是本地的php脚本解析服务器。
根据nginx服务器的配置，可以看出，用户访问的是动态的php资源，nginx会调用php相关脚本解析程序对用户访问的资源进行解析。
第三步：通过第二步可以看出，用户请求的是动态内容，nginx会将请求交给fastcgi客户端，通过fastcgi_pass将用户的请求发送给php-fpm
如果用户访问的是静态资源呢，那就简单了，nginx直接将用户请求的静态资源返回给用户；
第四步：fastcgi_pass将动态资源交给php-fpm后，php-fpm会将资源转给php脚本解析服务器的wrapper；
第五步：wrapper收到php-fpm转过来的请求后，wrapper会生成一个新的线程调用php动态程序解析服务器；
如果用户请求的是需要读取例如MySQL数据库等，将会触发读库操作；
如果用户请求的是如图片/附件等，PHP会触发一次查询后端存储服务器如通过NFS进行存储的存储集群;
第六步：php会将查询到的结果返回给nginx；
第七步：nginx构造一个响应报文将结果返回给用户；
这只是nginx的其中一种，用户请求的和返回用户请求结果是异步进行，即为用户请求的资源在nginx中做了一次中转，nginx可以同步，即为解析出来的资源，服务器直接将资源返回给用户，不用在nginx中做一次中转。
二、相关疑问
1、是不是每次用户对动态资源的请求都需要触发一次完整的动态资源解析过程？
不是，可以有两种方法解决这个问题：
第一，启用nginx本身具备的缓存功能，将动态资源解析结果缓存起来，下次用户进行对应资源访问时，nginx进行本次缓存查询，如果查询成功，则直接动态资源被解析后的静态资源返回给用户;
第二，在nginx后端部署缓存机器，如部署varnish缓存集群，对资源进行缓存，用户请求的资源，可以先在缓存集群上进行查找;
2、用nginx做缓存是否可行？看实际情况，如果在整个web架构中，nginx不是瓶颈的前提下，nginx可以用来做缓存，但是不建议这么做，因为nginx是用户请求和应答用户请求的必经之路，如果nginx出现了瓶颈，后端的其他如存储集群等性能再好也没用，所以在实际的部署中，不建议启用nginx的缓存功能（在将nginx作为http server的情况下）。因为启用nginx缓存功能，一是会降低nginx性能，二是会消耗部署nginx的对应服务器的硬件资源。
3、如果用一张图表示nginx fastcgi wrapper php之间的关系
4、fastcgi具体是个什么东西
CGI全称通用网关接口Commmon Gateway Interface
用于HTTP服务上的程序服务通信交流的一种工具，CGI程序须运行在网络服务器上。
传统CGI接口方式性能较差，由于每次HTTP服务器遇到动态程序需要重启解析器来执行解析，然后结果被返回给HTTP服务器。这在处理高并发时，几乎是不可能的，因此诞生了FastCGI。另外传统的CGI接口方式安全性也很差
一个可伸缩地。高速地在HTTP服务器和动态脚本语言间通信的接口
接口在linux下是socket（这个socket可以是文件socket也可以是ip socket）
主要优点把动态语言和HTTP服务器分离开来。多数流行的HTTP服务器都支持FsatCGI包括Apache/Nginx/lighttpd等
支持语言比较流行的是PHP，接口方式采用C/S架构，可以将HTTP服务器和脚本解析器分开，同时在脚本解析服务器上启动一个或者多个脚本解析守护进程。
当HTTP服务器每次遇到动态程序时，可以将其直接交付给FastCGI进程来执行，然后将得到的结果返回给浏览器。这种方式可以让HTTP服务器专一地处理静态请求或者将动态脚本服务器的结果返回给客户端，这在很大程度上提高了整个应用系统的性能。
5、具体的nginx+php的nginx相关配置
[work@daiyuanpei-yun conf]$ cat nginx.conf #user nobody; worker_processes 2; worker_rlimit_nofile 8192; #error_log logs/error_log debug; error_log /home/work/acct-platform/log/error_log notice; pid /home/work/acct-platform/var/nginx.pid; events { use epoll; worker_connections 8192; } http { include mime.types; default_type application/octet-stream; ignore_invalid_headers off; log_format main '$remote_addr - $remote_user [$time_local] "$request" ' '$status $body_bytes_sent "$http_referer" "$no_bduss_http_cookie" "$http_user_agent" ' '$request_time $http_x_bd_logid $http_x_bd_routerip $server_addr $upstream_addr $host ' '"$http_x_forwarded_for" $product $subsys $tracecode $msec'; access_log "/home/work/acct-platform/log/access_log" main; client_body_temp_path /home/work/acct-platform/webserver/cache/client_body; fastcgi_temp_path /home/work/acct-platform/webserver/cache/fastcgi; proxy_temp_path /home/work/acct-platform/webserver/cache/proxy; uwsgi_temp_path /home/work/acct-platform/webserver/cache/uwsgi; scgi_temp_path /home/work/acct-platform/webserver/cache/scgi; server_names_hash_bucket_size 128; client_header_buffer_size 4k; large_client_header_buffers 4 32k; client_max_body_size 4m; client_body_buffer_size 513k; client_body_timeout 15; client_header_timeout 10; send_timeout 240; sendfile on; tcp_nopush on; tcp_nodelay on; fastcgi_connect_timeout 600; fastcgi_send_timeout 600; fastcgi_read_timeout 600; fastcgi_buffer_size 64k; fastcgi_buffers 4 64k; fastcgi_busy_buffers_size 128k; fastcgi_temp_file_write_size 128k; fastcgi_intercept_errors on; keepalive_timeout 0; #keepalive_timeout 65; gzip on; gzip_min_length 10k; 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; policy_frame off; policy_path "/home/work/acct-platform/webserver/conf/"; policy_dtdname policy.dtd; policy_docname policy.xml; policy_logpath "/home/work/acct-platform/log/webserver"; policy_logfile policy.; policy_logsize 1600; policy_loglevel 16; proxy_connect_timeout 15s; proxy_read_timeout 24s; proxy_send_timeout 10s; proxy_buffer_size 64k; proxy_buffers 4 64k; proxy_busy_buffers_size 128k; proxy_temp_file_write_size 128k; proxy_set_header LOGID $logid; proxy_set_header Host $http_host; # charset GBK; uninitialized_variable_warn off; set_real_ip_from 10.0.0.0/8; real_ip_header CLIENTIP; # pblog config pblog_switch off; include vhost/php.conf; } [work@daiyuanpei-yun conf]$ cat vhost/php.conf server { listen 8081; more_set_headers 'Server: Apache'; #set $php_upstream 'unix:/home/work/acct-platform/php/var/php-cgi.sock'; set $php_upstream 'unix:/home/work/acct-platform/var/hhvm.sock'; #set $php_upstream 'unix:/home/work/acct-platform/var/phaster.hhvm.sock'; #########域名适配模块配置############### dna off; dna_adapt_path "/home/work/acct-platform/webserver/conf/adaption"; dna_url_adaption "device"; dna_cookie_adaption "device"; #########OMP支持####################### #设置产品线 set $product odp; #设置子系统 set $subsys odp; if ($http_x_bd_product) { #从接入层获取产品线 set $product $http_x_bd_product; } if ($http_x_bd_subsys) { #从接入层获取子系统 set $subsys $http_x_bd_subsys; } #设置no_bduss_http_cookie set $no_bduss_http_cookie $http_cookie; if ($http_cookie ~* "(.*)BDUSS=(.+?)(?:;|$)(.*)") { set $no_bduss_http_cookie $1$3; } underscores_in_headers on; logid_name x_bd_logid; #防盗链 if ($host !~ "^((.*\.)?(baidu\.(com|com\.cn|cn)|91\.com)|localhost|\d{1,3}(\.\d{1,3}){3})(:\d+)?$") { return 403; } location ~* /(\.svn|CVS|Entries){ deny all; } location ~* /((.*)\.(.*)\/(.*)\.php){ deny all; } location ~* /\.(sql|bak|inc|old)$ { deny all; } location ~ ^/(favicon.ico|static) { root /home/work/acct-platform/webroot; } location ~ \.php$ { root /home/work/acct-platform/webroot; fastcgi_pass $php_upstream; fastcgi_index index.php; include fastcgi.conf; } location / { root /home/work/acct-platform/webroot; index index.php; fastcgi_pass $php_upstream; include fastcgi.conf; rewrite ^/([^/.]*)(/[^\?]*)?((\?.*)?)$ /$1/index.php$2$3 break; } location ~* \.(content|static|resource|images|css|js|png|jpg|ico) { root /home/work/acct-platform/webroot; rewrite ^/(.*)/layer.css$ /$1/layer.min.css; expires 1m; } } [work@daiyuanpei-yun conf]$ cat fastcgi.conf fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name; fastcgi_param QUERY_STRING $query_string; fastcgi_param REQUEST_METHOD $request_method; fastcgi_param CONTENT_TYPE $content_type; fastcgi_param CONTENT_LENGTH $content_length; fastcgi_param PATH_INFO $fastcgi_script_name; fastcgi_param SCRIPT_NAME $fastcgi_script_name; fastcgi_param REQUEST_URI $request_uri; fastcgi_param DOCUMENT_URI $document_uri; fastcgi_param DOCUMENT_ROOT $document_root; fastcgi_param SERVER_PROTOCOL $server_protocol; fastcgi_param HTTPS $https if_not_empty; fastcgi_param GATEWAY_INTERFACE CGI/1.1; fastcgi_param SERVER_SOFTWARE nginx/$nginx_version; fastcgi_param REMOTE_ADDR $remote_addr; fastcgi_param REMOTE_PORT $remote_port; fastcgi_param SERVER_ADDR $server_addr; fastcgi_param SERVER_PORT $server_port; fastcgi_param SERVER_NAME $server_name; fastcgi_param LOGID $logid; fastcgi_param HTTP_X_BD_IDC $http_xbdidc; fastcgi_param HTTP_X_BD_PRODUCT $product; fastcgi_param HTTP_X_BD_SUBSYS $subsys; fastcgi_param HTTP_X_BD_LOGID $logid; fastcgi_param HTTP_X_BD_ROUTERIP $server_addr; # PHP only, required if PHP was built with --enable-force-cgi-redirect fastcgi_param REDIRECT_STATUS 200; [work@daiyuanpei-yun conf]$ cat fastcgi_params fastcgi_param QUERY_STRING $query_string; fastcgi_param REQUEST_METHOD $request_method; fastcgi_param CONTENT_TYPE $content_type; fastcgi_param CONTENT_LENGTH $content_length; fastcgi_param SCRIPT_NAME $fastcgi_script_name; fastcgi_param REQUEST_URI $request_uri; fastcgi_param DOCUMENT_URI $document_uri; fastcgi_param DOCUMENT_ROOT $document_root; fastcgi_param SERVER_PROTOCOL $server_protocol; fastcgi_param GATEWAY_INTERFACE CGI/1.1; fastcgi_param SERVER_SOFTWARE nginx/$nginx_version; fastcgi_param REMOTE_ADDR $http_x_forwarded_for; fastcgi_param REMOTE_PORT $remote_port; fastcgi_param SERVER_ADDR $server_addr; fastcgi_param SERVER_PORT $server_port; fastcgi_param SERVER_NAME $server_name; # PHP only, required if PHP was built with --enable-force-cgi-redirect fastcgi_param REDIRECT_STATUS 200; [work@daiyuanpei-yun acct-platform]$ find ./ -name php-fpm.conf ./php/etc/php-fpm.conf [work@daiyuanpei-yun acct-platform]$ cat ./php/etc/php-fpm.conf ;;;;;;;;;;;;;;;;;;;;; ; FPM Configuration ; ;;;;;;;;;;;;;;;;;;;;; ; All relative paths in this configuration file are relative to PHP's install ; prefix (/home/work/acct-platform/php). This prefix can be dynamically changed by using the ; '-p' argument from the command line. ; Include one or more files. If glob(3) exists, it is used to include a bunch of ; files from a glob(3) pattern. This directive can be used everywhere in the ; file. ; Relative path can also be used. They will be prefixed by: ; - the global prefix if it's been set (-p argument) ; - /home/work/acct-platform/php otherwise ;include=etc/fpm.d/*.conf ;;;;;;;;;;;;;;;;;; ; Global Options ; ;;;;;;;;;;;;;;;;;; [global] ; Pid file ; Note: the default prefix is /home/work/acct-platform/php/var ; Default Value: none pid = /home/work/acct-platform/var/php-fpm.pid ; Error log file ; If it's set to "syslog", log is sent to syslogd instead of being written ; in a local file. ; Note: the default prefix is /home/work/acct-platform/php/var ; Default Value: log/php-fpm.log error_log = /home/work/acct-platform/log/php/php-fpm.log ; syslog_facility is used to specify what type of program is logging the ; message. This lets syslogd specify that messages from different facilities ; will be handled differently. ; See syslog(3) for possible values (ex daemon equiv LOG_DAEMON) ; Default Value: daemon ;syslog.facility = daemon ; syslog_ident is prepended to every message. If you have multiple FPM ; instances running on the same server, you can change the default value ; which must suit common needs. ; Default Value: php-fpm ;syslog.ident = php-fpm ; Log level ; Possible Values: alert, error, warning, notice, debug ; Default Value: notice log_level = notice ; If this number of child processes exit with SIGSEGV or SIGBUS within the time ; interval set by emergency_restart_interval then FPM will restart. A value ; of '0' means 'Off'. ; Default Value: 0 emergency_restart_threshold = 10 ; Interval of time used by emergency_restart_interval to determine when ; a graceful restart will be initiated. This can be useful to work around ; accidental corruptions in an accelerator's shared memory. ; Available Units: s(econds), m(inutes), h(ours), or d(ays) ; Default Unit: seconds ; Default Value: 0 emergency_restart_interval = 1m ; Time limit for child processes to wait for a reaction on signals from master. ; Available units: s(econds), m(inutes), h(ours), or d(ays) ; Default Unit: seconds ; Default Value: 0 process_control_timeout = 5s ; The maximum number of processes FPM will fork. This has been design to control ; the global number of processes when using dynamic PM within a lot of pools. ; Use it with caution. ; Note: A value of 0 indicates no limit ; Default Value: 0 ; process.max = 128 ; Specify the nice(2) priority to apply to the master process (only if set) ; The value can vary from -19 (highest priority) to 20 (lower priority) ; Note: - It will only work if the FPM master process is launched as root ; - The pool process will inherit the master process priority ; unless it specified otherwise ; Default Value: no set ; process.priority = -19 ; Send FPM to background. Set to 'no' to keep FPM in foreground for debugging. ; Default Value: yes daemonize = yes ; Set open file descriptor rlimit for the master process. ; Default Value: system defined value ;rlimit_files = 1024 ; Set max core size rlimit for the master process. ; Possible Values: 'unlimited' or an integer greater or equal to 0 ; Default Value: system defined value ;rlimit_core = 0 ; Specify the event mechanism FPM will use. The following is available: ; - select (any POSIX os) ; - poll (any POSIX os) ; - epoll (linux >= 2.5.44) ; - kqueue (FreeBSD >= 4.1, OpenBSD >= 2.9, NetBSD >= 2.0) ; - /dev/poll (Solaris >= 7) ; - port (Solaris >= 10) ; Default Value: not set (auto detection) ;events.mechanism = epoll ; When FPM is build with systemd integration, specify the interval, ; in second, between health report notification to systemd. ; Set to 0 to disable. ; Available Units: s(econds), m(inutes), h(ours) ; Default Unit: seconds ; Default value: 10 ;systemd_interval = 10 ;;;;;;;;;;;;;;;;;;;; ; Pool Definitions ; ;;;;;;;;;;;;;;;;;;;; ; Multiple pools of child processes may be started with different listening ; ports and different management options. The name of the pool will be ; used in logs and stats. There is no limitation on the number of pools which ; FPM can handle. Your system will tell you anyway :) ; Start a new pool named 'www'. ; the variable $pool can we used in any directive and will be replaced by the ; pool name ('www' here) [www] ; Per pool prefix ; It only applies on the following directives: ; - 'slowlog' ; - 'listen' (unixsocket) ; - 'chroot' ; - 'chdir' ; - 'php_values' ; - 'php_admin_values' ; When not set, the global prefix (or /home/work/acct-platform/php) applies instead. ; Note: This directive can also be relative to the global prefix. ; Default Value: none ;prefix = /path/to/pools/$pool ; Unix user/group of processes ; Note: The user is mandatory. If the group is not set, the default user's group ; will be used. ; user = nobody ; group = nobody ; The address on which to accept FastCGI requests. ; Valid syntaxes are: ; 'ip.add.re.ss:port' - to listen on a TCP socket to a specific address on ; a specific port; ; 'port' - to listen on a TCP socket to all addresses on a ; specific port; ; '/path/to/unix/socket' - to listen on a unix socket. ; Note: This value is mandatory. listen = /home/work/acct-platform/php/var/php-cgi.sock ; Set listen(2) backlog. ; Default Value: 128 (-1 on FreeBSD and OpenBSD) listen.backlog = -1 ; Set permissions for unix socket, if one is used. In Linux, read/write ; permissions must be set in order to allow connections from a web server. Many ; BSD-derived systems allow connections regardless of permissions. ; Default Values: user and group are set as the running user ; mode is set to 0666 ;listen.owner = nobody ;listen.group = nobody listen.mode = 0666 ; List of ipv4 addresses of FastCGI clients which are allowed to connect. ; Equivalent to the FCGI_WEB_SERVER_ADDRS environment variable in the original ; PHP FCGI (5.2.2+). Makes sense only with a tcp listening socket. Each address ; must be separated by a comma. If this value is left blank, connections will be ; accepted from any ip address. ; Default Value: any listen.allowed_clients = 127.0.0.1 ; Specify the nice(2) priority to apply to the pool processes (only if set) ; The value can vary from -19 (highest priority) to 20 (lower priority) ; Note: - It will only work if the FPM master process is launched as root ; - The pool processes will inherit the master process priority ; unless it specified otherwise ; Default Value: no set ; priority = -19 ; Choose how the process manager will control the number of child processes. ; Possible Values: ; static - a fixed number (pm.max_children) of child processes; ; dynamic - the number of child processes are set dynamically based on the ; following directives. With this process management, there will be ; always at least 1 children. ; pm.max_children - the maximum number of children that can ; be alive at the same time. ; pm.start_servers - the number of children created on startup. ; pm.min_spare_servers - the minimum number of children in 'idle' ; state (waiting to process). If the number ; of 'idle' processes is less than this ; number then some children will be created. ; pm.max_spare_servers - the maximum number of children in 'idle' ; state (waiting to process). If the number ; of 'idle' processes is greater than this ; number then some children will be killed. ; ondemand - no children are created at startup. Children will be forked when ; new requests will connect. The following parameter are used: ; pm.max_children - the maximum number of children that ; can be alive at the same time. ; pm.process_idle_timeout - The number of seconds after which ; an idle process will be killed. ; Note: This value is mandatory. pm = static ; The number of child processes to be created when pm is set to 'static' and the ; maximum number of child processes when pm is set to 'dynamic' or 'ondemand'. ; This value sets the limit on the number of simultaneous requests that will be ; served. Equivalent to the ApacheMaxClients directive with mpm_prefork. ; Equivalent to the PHP_FCGI_CHILDREN environment variable in the original PHP ; CGI. The below defaults are based on a server without much resources. Don't ; forget to tweak pm.* to fit your needs. ; Note: Used when pm is set to 'static', 'dynamic' or 'ondemand' ; Note: This value is mandatory. pm.max_children = 8 ; The number of child processes created on startup. ; Note: Used only when pm is set to 'dynamic' ; Default Value: min_spare_servers + (max_spare_servers - min_spare_servers) / 2 pm.start_servers = 20 ; The desired minimum number of idle server processes. ; Note: Used only when pm is set to 'dynamic' ; Note: Mandatory when pm is set to 'dynamic' pm.min_spare_servers = 5 ; The desired maximum number of idle server processes. ; Note: Used only when pm is set to 'dynamic' ; Note: Mandatory when pm is set to 'dynamic' pm.max_spare_servers = 35 ; The number of seconds after which an idle process will be killed. ; Note: Used only when pm is set to 'ondemand' ; Default Value: 10s ;pm.process_idle_timeout = 10s; ; The number of requests each child process should execute before respawning. ; This can be useful to work around memory leaks in 3rd party libraries. For ; endless request processing specify '0'. Equivalent to PHP_FCGI_MAX_REQUESTS. ; Default Value: 0 pm.max_requests = 10000 ; The URI to view the FPM status page. If this value is not set, no URI will be ; recognized as a status page. It shows the following informations: ; pool - the name of the pool; ; process manager - static, dynamic or ondemand; ; start time - the date and time FPM has started; ; start since - number of seconds since FPM has started; ; accepted conn - the number of request accepted by the pool; ; listen queue - the number of request in the queue of pending ; connections (see backlog in listen(2)); ; max listen queue - the maximum number of requests in the queue ; of pending connections since FPM has started; ; listen queue len - the size of the socket queue of pending connections; ; idle processes - the number of idle processes; ; active processes - the number of active processes; ; total processes - the number of idle + active processes; ; max active processes - the maximum number of active processes since FPM ; has started; ; max children reached - number of times, the process limit has been reached, ; when pm tries to start more children (works only for ; pm 'dynamic' and 'ondemand'); ; Value are updated in real time. ; Example output: ; pool: www ; process manager: static ; start time: 01/Jul/2011:17:53:49 +0200 ; start since: 62636 ; accepted conn: 190460 ; listen queue: 0 ; max listen queue: 1 ; listen queue len: 42 ; idle processes: 4 ; active processes: 11 ; total processes: 15 ; max active processes: 12 ; max children reached: 0 ; ; By default the status page output is formatted as text/plain. Passing either ; 'html', 'xml' or 'json' in the query string will return the corresponding ; output syntax. Example: ; http://www.foo.bar/status ; http://www.foo.bar/status?json ; http://www.foo.bar/status?html ; http://www.foo.bar/status?xml ; ; By default the status page only outputs short status. Passing 'full' in the ; query string will also return status for each pool process. ; Example: ; http://www.foo.bar/status?full ; http://www.foo.bar/status?json&full ; http://www.foo.bar/status?html&full ; http://www.foo.bar/status?xml&full ; The Full status returns for each process: ; pid - the PID of the process; ; state - the state of the process (Idle, Running, ...); ; start time - the date and time the process has started; ; start since - the number of seconds since the process has started; ; requests - the number of requests the process has served; ; request duration - the duration in µs of the requests; ; request method - the request method (GET, POST, ...); ; request URI - the request URI with the query string; ; content length - the content length of the request (only with POST); ; user - the user (PHP_AUTH_USER) (or '-' if not set); ; script - the main script called (or '-' if not set); ; last request cpu - the %cpu the last request consumed ; it's always 0 if the process is not in Idle state ; because CPU calculation is done when the request ; processing has terminated; ; last request memory - the max amount of memory the last request consumed ; it's always 0 if the process is not in Idle state ; because memory calculation is done when the request ; processing has terminated; ; If the process is in Idle state, then informations are related to the ; last request the process has served. Otherwise informations are related to ; the current request being served. ; Example output: ; ************************ ; pid: 31330 ; state: Running ; start time: 01/Jul/2011:17:53:49 +0200 ; start since: 63087 ; requests: 12808 ; request duration: 1250261 ; request method: GET ; request URI: /test_mem.php?N=10000 ; content length: 0 ; user: - ; script: /home/fat/web/docs/php/test_mem.php ; last request cpu: 0.00 ; last request memory: 0 ; ; Note: There is a real-time FPM status monitoring sample web page available ; It's available in: ${prefix}/share/fpm/status.html ; ; Note: The value must start with a leading slash (/). The value can be ; anything, but it may not be a good idea to use the .php extension or it ; may conflict with a real PHP file. ; Default Value: not set ;pm.status_path = /status ; The ping URI to call the monitoring page of FPM. If this value is not set, no ; URI will be recognized as a ping page. This could be used to test from outside ; that FPM is alive and responding, or to ; - create a graph of FPM availability (rrd or such); ; - remove a server from a group if it is not responding (load balancing); ; - trigger alerts for the operating team (24/7). ; Note: The value must start with a leading slash (/). The value can be ; anything, but it may not be a good idea to use the .php extension or it ; may conflict with a real PHP file. ; Default Value: not set ;ping.path = /ping ; This directive may be used to customize the response of a ping request. The ; response is formatted as text/plain with a 200 response code. ; Default Value: pong ;ping.response = pong ; The access log file ; Default: not set ;access.log = log/$pool.access.log ; The access log format. ; The following syntax is allowed ; %%: the '%' character ; %C: %CPU used by the request ; it can accept the following format: ; - %{user}C for user CPU only ; - %{system}C for system CPU only ; - %{total}C for user + system CPU (default) ; %d: time taken to serve the request ; it can accept the following format: ; - %{seconds}d (default) ; - %{miliseconds}d ; - %{mili}d ; - %{microseconds}d ; - %{micro}d ; %e: an environment variable (same as $_ENV or $_SERVER) ; it must be associated with embraces to specify the name of the env ; variable. Some exemples: ; - server specifics like: %{REQUEST_METHOD}e or %{SERVER_PROTOCOL}e ; - HTTP headers like: %{HTTP_HOST}e or %{HTTP_USER_AGENT}e ; %f: script filename ; %l: content-length of the request (for POST request only) ; %m: request method ; %M: peak of memory allocated by PHP ; it can accept the following format: ; - %{bytes}M (default) ; - %{kilobytes}M ; - %{kilo}M ; - %{megabytes}M ; - %{mega}M ; %n: pool name ; %o: output header ; it must be associated with embraces to specify the name of the header: ; - %{Content-Type}o ; - %{X-Powered-By}o ; - %{Transfert-Encoding}o ; - .... ; %p: PID of the child that serviced the request ; %P: PID of the parent of the child that serviced the request ; %q: the query string ; %Q: the '?' character if query string exists ; %r: the request URI (without the query string, see %q and %Q) ; %R: remote IP address ; %s: status (response code) ; %t: server time the request was received ; it can accept a strftime(3) format: ; %d/%b/%Y:%H:%M:%S %z (default) ; %T: time the log has been written (the request has finished) ; it can accept a strftime(3) format: ; %d/%b/%Y:%H:%M:%S %z (default) ; %u: remote user ; ; Default: "%R - %u %t \"%m %r\" %s" ;access.format = "%R - %u %t \"%m %r%Q%q\" %s %f %{mili}d %{kilo}M %C%%" ; The log file for slow requests ; Default Value: not set ; Note: slowlog is mandatory if request_slowlog_timeout is set slowlog = /home/work/acct-platform/log/php/php-fpm-slow.log ; The timeout for serving a single request after which a PHP backtrace will be ; dumped to the 'slowlog' file. A value of '0s' means 'off'. ; Available units: s(econds)(default), m(inutes), h(ours), or d(ays) ; Default Value: 0 request_slowlog_timeout = 1s ; The timeout for serving a single request after which the worker process will ; be killed. This option should be used when the 'max_execution_time' ini option ; does not stop script execution for some reason. A value of '0' means 'off'. ; Available units: s(econds)(default), m(inutes), h(ours), or d(ays) ; Default Value: 0 request_terminate_timeout = 30s ; Set open file descriptor rlimit. ; Default Value: system defined value rlimit_files = 1024 ; Set max core size rlimit. ; Possible Values: 'unlimited' or an integer greater or equal to 0 ; Default Value: system defined value rlimit_core = 0 ; Chroot to this directory at the start. This value must be defined as an ; absolute path. When this value is not set, chroot is not used. ; Note: you can prefix with '$prefix' to chroot to the pool prefix or one ; of its subdirectories. If the pool prefix is not set, the global prefix ; will be used instead. ; Note: chrooting is a great security feature and should be used whenever ; possible. However, all PHP paths will be relative to the chroot ; (error_log, sessions.save_path, ...). ; Default Value: not set ;chroot = ; Chdir to this directory at the start. ; Note: relative path can be used. ; Default Value: current directory or / when chroot ;chdir = /var/www ; Redirect worker stdout and stderr into main error log. If not set, stdout and ; stderr will be redirected to /dev/null according to FastCGI specs. ; Note: on highloaded environement, this can cause some delay in the page ; process time (several ms). ; Default Value: no catch_workers_output = yes ; Limits the extensions of the main script FPM will allow to parse. This can ; prevent configuration mistakes on the web server side. You should only limit ; FPM to .php extensions to prevent malicious users to use other extensions to ; exectute php code. ; Note: set an empty value to allow all extensions. ; Default Value: .php ;security.limit_extensions = .php .php3 .php4 .php5 ; Pass environment variables like LD_LIBRARY_PATH. All $VARIABLEs are taken from ; the current environment. ; Default Value: clean env env[HOSTNAME] = $HOSTNAME env[PATH] = $PATH env[TMP] = /tmp env[TMPDIR] = /tmp env[TEMP] = /tmp env[OSTYPE] = $OSTYPE env[MACHTYPE] = $MACHTYPE env[MALLOC_CHECK_] = 2 env[GCONV_PATH] = $GCONV_PATH ; Additional php.ini defines, specific to this pool of workers. These settings ; overwrite the values previously defined in the php.ini. The directives are the ; same as the PHP SAPI: ; php_value/php_flag - you can set classic ini defines which can ; be overwritten from PHP call 'ini_set'. ; php_admin_value/php_admin_flag - these directives won't be overwritten by ; PHP call 'ini_set' ; For php_*flag, valid values are on, off, 1, 0, true, false, yes or no. ; Defining 'extension' will load the corresponding shared extension from ; extension_dir. Defining 'disable_functions' or 'disable_classes' will not ; overwrite previously defined php.ini values, but will append the new value ; instead. ; Note: path INI options can be relative and will be expanded with the prefix ; (pool, global or /home/work/acct-platform/php) ; Default Value: nothing is defined by default except the values in php.ini and ; specified at startup with the -d argument ;php_admin_value[sendmail_path] = /usr/sbin/sendmail -t -i -f www@my.domain.com ;php_flag[display_errors] = off ;php_admin_value[error_log] = /var/log/fpm-php.www.log ;php_admin_flag[log_errors] = on ;php_admin_value[memory_limit] = 32M
