On Monday 10 April 2017 09:46:54 Daniel Verite wrote:
> John Iliffe wrote:
> > Based on the reference that Joe sent earlier, I do have a second
> > domain socket on /var/pgsql but the problem is how do I get PHP to
> > look there?
>
> pg_connect("host=/var/pgsql [...other parameters...]")
>
> The fact that the value for host starts with a slash indicates
> without ambiguity that it's a path on disk rather than the name
> or address of a host on the network.
>
> However if apache runs in a chroot jail, it should no more see
> /var/pgsql than it sees /tmp
> Given an apache process id, on Linux you should be able
> to check the current filesystem-root of that process with
> # ls -ld /proc/$PID/root
> It should show a soft link to the directory that corresponds to
> the root from the point of view of the $PID process.
>
You are exceeding my level of understanding of Linux but the following
result suggests to me that Apache is using the common root directory (/) as
its base.
-------------------------------------
[root@prod04 John]# ls -ld /proc/27753/root
lrwxrwxrwx. 1 root root 0 Apr 10 10:52 /proc/27753/root -> /
--------------------------------------
Other than the rather odd requirement in the systemctl unit file that httpd
has a private /tmp (see arrow below) there should be no reason why Apache
can't see the /tmp directory. One of the earlier references in this series
mentioned I should check for that, which is the reason for the secondary
socket on /var/pgsql/ . I don't know how to make mod_php, or for that
matter php-fpm, look for the Postgresql socket on /var/pgsql/ though.
There is no conf file for mod_php and no directive that I can find in the
php-fpm configuration file.
--------------------------------
[root@prod04 John]# cat /etc/systemd/system/httpd.service
[Unit]
Description=The Apache HTTP Server
[Service]
Type=forking
EnvironmentFile=/usr/apache-2.4.25/bin/envvars
PIDFile=/var/run/httpd.pid
ExecStart=/usr/apache-2.4.25/bin/apachectl -k start
ExecReload=/usr/apache-2.4.25/bin/apachectl -k graceful
ExecStop=/usr/apache-2.4.25/bin/apachectl -k stop
KillSignal=SIGCONT
PrivateTmp=true <-----------
[Install]
WantedBy=multi-user.target
--------------------------------
FYI, changing the PrivateTmp directive to false doesn't fix the problem and
since I don't know why it is there I don't ant to touch it.
> But again, most people would use host=localhost in this setup.
>
> Best regards,
