I've done this setup quite often but this time I'm overseeing something surely.
Goal
Having an Apache 2.4 vhosts using different PHP-FPM pools for each vhost using their own system user within an LXD container.
The problem
Everything is working fine except that when a file is uploaded, the upload directory must be set on www-data which shouldn't be needed in PHP-FPM.
System
Ubuntu 16.04 LXD contianer
Code
/etc/apache2/conf-enabled/php7.0-fpm.conf
root@web1:~# cat /etc/apache2/conf-enabled/php7.0-fpm.conf
# Redirect to local php-fpm if mod_php is not available
<IfModule !mod_php7.c>
# Enable http authorization headers
SetEnvIfNoCase ^Authorization$ "(.+)" HTTP_AUTHORIZATION=$1
<FilesMatch ".+\.ph(p[3457]?|t|tml)$">
SetHandler "proxy:unix:/run/php/php7.0-fpm.sock|fcgi://localhost"
</FilesMatch>
<FilesMatch ".+\.phps$">
# Deny access to raw php sources by default
# To re-enable it's recommended to enable access to the files
# only in specific virtual host or directory
Require all denied
</FilesMatch>
# Deny access to files without filename (e.g. '.php')
<FilesMatch "^\.ph(p[3457]?|t|tml|ps)$">
Require all denied
</FilesMatch>
</IfModule>/etc/apache2/sites-enabled/hs2.nl.conf
root@web1:~# cat /etc/apache2/sites-enabled/hs2.nl.conf
<VirtualHost *:80>
ServerAdmin webmaster@hs2.nl
ServerName hs2.nl
ServerAlias www.hs2.nl
DocumentRoot /var/www/html/hs2.nl/web
ErrorLog ${APACHE_LOG_DIR}/hs2.nl-error.log
CustomLog ${APACHE_LOG_DIR}/hs2.nl-access.log combined
#LogFormat "%h %l %u %t \"%r\" %>s %b %{X-Forwarded-For}i" common
<Directory /var/www/html/hs2.nl/web>
Options -Indexes +FollowSymLinks
AllowOverride All
Require all granted
</Directory>
<Directory /usr/lib/cgi-bin>
Require all granted
</Directory>
<IfModule mod_fastcgi.c>
AddHandler php7-fcgi .php
Action php7-fcgi /php7-fcgi
Alias /php7-fcgi /usr/lib/cgi-bin/hs2.nl-fcgi
FastCgiExternalServer /usr/lib/cgi-bin/hs2.nl-fcgi -socket /var/run/php/hs2.nl-fpm.sock -pass-header Authorization
</IfModule>
</VirtualHost>/etc/php/7.0/fpm/pool.d/hs2.nl.conf
root@web1:~# cat /etc/php/7.0/fpm/pool.d/hs2.nl.conf
[hs2.nl]
user = hs2.nl
group = hs2.nl
listen = /var/run/php/hs2.nl-fpm.sock
listen.owner = hs2.nl
listen.group = hs2.nl
prefix = /var/www/html/hs2.nl
chroot = $prefix
pm = dynamic
pm.max_children = 5
pm.start_servers = 2
pm.min_spare_servers = 1
pm.max_spare_servers = 3Directory permissions
hs2.nl@web1:~/web/uploads$ ls -ald .
drwxr-xr-x 2 hs2.nl hs2.nl 2 Oct 26 15:15 .
hs2.nl@web1:~/web/uploads$ pwd
/var/www/html/hs2.nl/web/uploadsProcesses running as their respective user
root@web1:~# ps aux | egrep "USER|php-fpm: master|pool hs2.nl"
USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND
root 16470 0.0 0.3 365880 20220 ? Ss 14:55 0:00 php-fpm: master process (/etc/php/7.0/fpm/php-fpm.conf)
hs2.nl 16479 0.0 0.0 365688 4764 ? S 14:55 0:00 php-fpm: pool hs2.nl
hs2.nl 16480 0.0 0.0 365688 4764 ? S 14:55 0:00 php-fpm: pool hs2.nlphpinfo
hs2.nl@web1:~/web$ cat phpinfo.php
<?php
$id = shell_exec(id);
$whoami = shell_exec(whoami);
echo "Id: " . $id . "<br />";
echo "Who am I?: " . $whoami . "<br />";
phpinfo();
?>Output
Id: uid=33(www-data) gid=33(www-data) groups=33(www-data)
Who am I?: www-data Further thoughts
I thought it might have something to do with LXD but as it seems all pools run under their own users.
Edit: to eliminate this theory I've loaded the very same configuration onto a normal KVM virtual machine where I was able to reproduce the problem in exactly the same way so I must've done something wrong in my configuration, it's nothing to do with LXD.
