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Martin Hope
user2265529
Asked: 2016-08-29 00:34:30 +0800 CST
  • 2

I need to increase max number of allowed opened files for Nginx 1.10 and PHP-FPM 7 on Ubuntu 16.04. According to some tutorials i changed the max number of opened files per user in /etc/security/limits.conf

*    soft nofile 64000
*    hard nofile 68000

I also changed the max number of opened files for entire system in /etc/sysctl.conf

fs.file-max = 200500

After reloading my virtual machine i checked soft and hard limits for the user i login to the system with

igor@ubuntu:~$ ulimit -Sn
64000
igor@ubuntu:~$ ulimit -Hn
68000

As you see, the limits applied to users. My problem is that i can't change the limits for Nginx and PHP

igor@ubuntu:~$ sudo ps aux|grep nginx
root      1124  0.0  0.0  45988   980 ?        Ss   01:04   0:00 nginx: master process /usr/sbin/nginx -g daemon on; master_process on;
www-data  1125  0.0  0.2  46164  2372 ?        S    01:04   0:00 nginx: worker process
igor      2754  0.0  0.0   5108   848 pts/6    S+   01:14   0:00 grep --color=auto nginx
igor@ubuntu:~$ cat /proc/1124/limits
Limit                     Soft Limit           Hard Limit           Units     

.....
Max open files            1024                 4096                 files     
.....

And the same thing for php

igor@ubuntu:~$ sudo ps aux|grep php
root      1097  0.0  2.1 118388 22496 ?        Ss   01:04   0:00 php-fpm: master process (/etc/php/7.0/fpm/php-fpm.conf)
www-data  1140  0.0  0.5 118388  5532 ?        S    01:04   0:00 php-fpm: pool www
www-data  1141  0.0  0.5 118388  5532 ?        S    01:04   0:00 php-fpm: pool www
igor      2795  0.0  0.0   5108   852 pts/6    S+   01:20   0:00 grep --color=auto php
igor@ubuntu:~$ cat /proc/1097/limits
Limit                     Soft Limit           Hard Limit           Units     
.....
Max open files            1024                 4096                 files     
.....

How can i change the limits for PHP and NGINX?

ubuntu php nginx php-fpm
Martin Hope
user2265529
Asked: 2016-08-27 17:17:33 +0800 CST
  • 0

I'm setting a new web server. I have NGINX with php-fpm on ubuntu 16.04. Everything works great except one thing: after 2-3 days of correct working PHP can't run any external system command. What do i mean when i say "system command"? For example when i run function shell_exec with argument 'whoami'

echo shell_exec('whoami');

i get the following

Warning: shell_exec(): Unable to execute 'whoami'

And it happens for every Linux command that php script tries to execute

When i trying to send mail using the mail() function i get a similar error

Warning: mail(): Could not execute mail delivery program '/usr/sbin/sendmail -t -i '

It happens only when i run PHP-script from browser. If i try to run it from terminal like so

sudo -u www-data php /path/to/my/script.php

then everything works OK.

Again: the problem appears only after some time of correct working and disappears(for some time) after VDS restart. It appears only when i run a script from browser, that means it served by NGINX.

Please, help me find a solution for my problem.

P.S Logs: Php errors logs

[27-Aug-2016 04:19:37 Europe/Moscow] PHP Fatal error:  Uncaught Error: Call to a member function is_logged() on null in /home/serv/www/templates/page_parts/header_tpl.php:6
Stack trace:
#0 /home/serv/www/templates/index_tpl.php(9): require()
#1 /home/serv/www/php_classes/templater_class.php(116): include('/home/serv/www/...')
#2 /home/serv/www/functions.php(827): templater->load_template()
#3 /home/serv/www/functions.php(804): error_wrong_csrf()
#4 /home/serv/www/index.php(16): csrf_check_post('1b46edd81f1563a...')
#5 {main}
  thrown in /home/serv/www/templates/page_parts/header_tpl.php on line 6
[27-Aug-2016 04:19:48 Europe/Moscow] PHP Warning:  mail(): Could not execute mail delivery program '/usr/sbin/sendmail -t -i ' in /home/serv/www/php_classes/mail_class.php on line 84
[27-Aug-2016 04:27:42 Europe/Moscow] PHP Warning:  shell_exec(): Unable to execute 'whoami' in /home/serv/www/test_mail.php on line 29

Syslog:

Aug 27 04:39:01 frankfurt CRON[30551]: (root) CMD (  [ -x /usr/lib/php/sessionclean ] && /usr/lib/php/sessionclean)
Aug 27 04:39:01 frankfurt CRON[30552]: (root) CMD (   test -x /etc/cron.daily/popularity-contest && /etc/cron.daily/popularity-contest --crond)

in php7.0-fpm.log there is nothing from today

nginx php-fpm ubuntu-16.04
Martin Hope
user2265529
Asked: 2016-07-04 08:52:38 +0800 CST
  • 1

I'm configuring a new web server and i need to make emails from my PHP scripts to be sent. Most messages should be sent using mandrill SMTP and some "directly" from my server to email services. I registered an account at mandrill and configured postfix server according to this tutorial. I created /etc/postfix/sasl_passwd and edited main.cf file. I set relayhost to mandrill SMTP.

relayhost = [smtp.mandrillapp.com]

If i try sending messages when postfix configured this way - all messages being sent using mandrill SMTP. I tried it and it works. But as i said, i need some messages to be sent directly. I determine, which emails should be sent using SMTP and which directly, by setting different sender("from") email addresses. In the tutorial i mentioned i found that to do what i need, i need to use sender_dependent_relayhost_maps option and remove the value of relayhost.
I use the following config

relayhost =
sender_dependent_relayhost_maps = hash:/etc/postfix/relayhost_maps

I created /etc/postfix/relayhost_maps and it looks like this

[email protected]   [smtp.mandrillapp.com]

Now all messages should be sent directly, except for messages from [email protected] that must be sent using external SMTP. The problem is when i try to send messages with this configuration - all messages being sent directly(i see this in gmail when i receive it).

I tried putting in /etc/postfix/relayhost_maps different SMTP hosts, different email addresses but all messages still being sent directly.

Please, help me solve this problem.

email smtp postfix mandrill