nginx+php-fpm不记录php错误日志error log怎么办?
遇到问题,nginx中不记录php错误日志,php由php-fpm来控制执行,因此nginx在前端无法记录php错误日志,如何解决这个问题?
将架构从apache+mod_php迁移到nginx+fpm上,会发现如果php脚本出错,nginx的eror_log里不会有记录,只在access_log里记录了500状态码。
原因:nginx将php的脚本执行通过fastcgi转到fpm上,所以出错的信息不会记录在nginx的error_log中。
下面介绍下配置fpm错误日志的方法。
参考:
下面具体介绍下php-fpm下记录php错误日志的配置方法与步骤。
php5-fpm.conf
php5-fpm的错误日志是在php5-fpm.conf全局配置中进行设置,查看php5-fpm.conf日志:
 
复制代码 代码示例:
;;;;;;;;;;;;;;;;;;  
; Global Options ;  
;;;;;;;;;;;;;;;;;;  
  
[global]  
; Pid file  
; Note: the default prefix is /var  
; Default Value: none  
;pid = run/php-fpm.pid  
pid = /var/run/php5-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 /var  
; Default Value: log/php-fpm.log  
; error_log = log/php-fpm.log  
#配置error_log,设置error_log的存放位置  
error_log = /var/log/fpm/php5-fpm.error.log  
  
; syslog_facility is u
sed 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  
#错误级别(生产环境下应该提高错误级别,推荐error)  
log_level = notice  
  
#表示在emergency_restart_interval所设时间内出现SIGSEGV或者SIGBUS错误的php-cgi进程数如果超过emergency_restart_threshold个,php-fpm就会优雅重启  
emergency_restart_threshold = 60  
emergency_restart_interval = 60s  
  
; 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 = 0  
  
; 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  
  
; Send FPM to background. Set to 'no' to keep FPM in foreground for debugging.  
; Default Value: yes  
#后台执行fpm,设置为yes  
daemonize = yes 
pool.d目录下配置文件(例如:www.conf)
1)保证配置文件中一个参数的开启,参数定义看英文注释:
 
复制代码 代码示例:
; 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 
2)同时可以开启access_log和slow_log
 
复制代码 代码示例:
access.log = /var/log/fpm/php5-fpm.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: ouput 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 = /var/log/fpm/php5-fpm.log.slow  
   
; 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 = 3 
附,fpm日志按天分割脚本
 
复制代码 代码示例:
#!/bin/bash -   
  
#1.fpm日志存放路径  
php5_fpm_path="/var/log/php5-fpm"  
  
path_array=($php5_fpm_path)  
  
#2.日志标识前缀数组  
icontact_fpm_sign="test"  
test_fpm_sign="php5-fpm"  
  
prefix_array=($icontact_fpm_sign $test_fpm_sign)  
  
#3.日志success or slow 标识后缀数组  
bool_array=("access" "slow" "error")  
  
#4.
nginx日志切割备份后缀  
postfix=`date +%Y%m%d`".log"  
  
#5.备份当前的
日志文件,重命名改为日期后缀  
for path in ${path_array[*]}  
do  
    for prefix in ${prefix_array[*]}  
    do  
        for bool in ${bool_array[*]}  
        do  
            file=$path/$prefix.$bool.log  
            backfile=$path/$prefix.$bool.$postfix  
            if [ -e $file ]  
            then  
                mv $file    $backfile  
            fi  
        done  
    done  
done  
  
#6.查找nginx进程号,让其产生新的日志文件  
fpm_pid=`ps -aux |grep -E 'php-fpm: master process'|grep -v 'grep'|
linuxjishu/13830.html target=_blank class=infotextkey>awk '{print $2}'`  
#USR1:Reopen log files,刷新nginx日志文件  
kill -USR1 $fpm_pid 
问题
为了减少线上服务器的错误信息输出,将php-fpm.conf的Log_level = error,这种配置在php5-fpm的错误日志里再也看不到错误信息了。
原因定位
将Log_level = notice后的错误日志信息截图:

fpm将php中warning或error的错误全部定位成了notice级别,所以线上想看fpm的错误日志只能将错误级别定位成notice了。