PHP-FPM可以创建slow.log但不能将内容写入slow.log

Question

Today, I want to enable the slow-logs with PHP-FPM , and then I configured some parameters into the php-fpm.conf . In the end, I have a problem, it can create the slow-log, but can't write any contents into the slow-log. Can someone help me, thanks a lot?

My website is running in Docker, and my Nginx use Unix Sockets to communicate with PHP-FPM , and Nginx running as Root

location ~ \.php$ {
   try_files $uri =404;
   fastcgi_pass unix:/var/run/php-fpm7.sock;
}

My php-fpm.conf is

[www123]
user = app
group = app
listen = /var/run/php-fpm7.sock
listen.owner = app
listen.group = app
listen.mode = 0666

pm = dynamic
pm.max_children = 5
pm.start_servers = 2
pm.min_spare_servers = 1
pm.max_spare_servers = 3

slowlog = /app/logs/my_slow_log/$pool.log.slow
request_slowlog_timeout = 1s

Next step, I created the directory app/logs/my_slow_log and restart the PHP-FPM. It created the file www123.log.slow in directory app/logs/my_slow_log , but the file permission/user/group is wrong. It was 600 / root / root

/app/logs/my_slow_log # ls -al
total 4
drwxr-xr-x    2 app      app             28 May 16 19:32 .
drwxrwxrwx    3 app      app           4096 May 16 19:00 ..
-rw-------    1 root     root             0 May 16 19:32 www123.log.slow

There are some running processes

app/logs/my_slow_log # ps -ef
PID   USER     TIME   COMMAND
    1 root       0:00 runsvdir /etc/service
    7 root       0:00 runsv nginx
    8 root       0:00 runsv javabridge
    9 root       0:00 runsv php7
   10 root       0:00 java -jar /usr/lib/jvm/java-1.8-openjdk/jre/lib/ext/JavaBridge.jar SERVLET_LOCAL:8080
   11 root       0:00 nginx: master process /usr/sbin/nginx -c /etc/nginx/nginx.conf -g daemon off;
   12 root       0:00 {php-fpm7} php-fpm: master process (/etc/php7/php-fpm.conf)
   13 root       0:00 nginx: worker process
   14 root       0:00 nginx: worker process
   15 root       0:00 nginx: worker process
   16 root       0:00 nginx: worker process
   22 app        0:00 {php-fpm7} php-fpm: pool www123
   23 app        0:00 {php-fpm7} php-fpm: pool www123

I find the master php-fpm process was run as Root , but the child process was run as app , so I modified the php-fpm.conf change

user = root
group = root
listen.owner = root
listen.group = root

then restart PHP-FPM, I got some error message

ERROR: [pool www123] please specify user and group other than root
ERROR: FPM initialization failed

It can't work as Root . I think the problem was /app/logs/my_slow_log/www123.log.slow created by PHP-FPM master process with root , and my child process was user app , so it can't write anything into the slow-log.

I didn't know what truly happened, can anybody help me? Thanks.

Answer 1

你可以使用这个命令（chmod 777 my_slow_log），我认为Log目录权限并不重要。