Nagios + nginx (php-fpm) + fcgiwrap

leebrown66

Well-Known Member

Reaction score: 142
Messages: 422

NOTES - General
This is NOT a guide to configure Nagios. Rather it shows how to configure nginx, serving PHP via php-fpm and CGI via fcgiwrap for the Nagios server.

Notes - php-fpm
The default is to use a tcp socket. This configuration instead uses a unix socket for better performance/lower overhead.

pkg install net-mgmt/nagios4 www/nginx www/fcgiwrap
Using the quarterly packages on FreeBSD 11.1-RELEASE, this resulted in:
www/fcgiwrap-1.1.0_8
net-mgmt/nagios4-4.3.4_1,1
www/nginx-1.12.2_11,2

EDIT: I discovered later that in order for the map functionality to work I also needed to install php56-filter. However this does not prevent Nagios from being usable. You should check which version of php is installed though.

Edit these files accordingly:
/usr/local/etc/php-fpm.conf
Code:
#listen = 127.0.0.1:9000
listen = /var/run/php-fpm.sock
listen.owner = www
listen.group = www
listen.mode = 0660
/etc/rc.conf
Code:
nagios_enable="YES"
fcgiwrap_enable="YES"
fcgiwrap_user="www"
fcgiwrap_group="www"
fcgiwrap_socket_mode="0660"
fcgiwrap_socket_owner="www"
fcgiwrap_socket_group="www"
nginx_enable="YES"
php_fpm_enable="YES"
/usr/local/etc/nginx.conf
Inside the server declaration
Code:
location /nagios {
auth_basic "Restricted";
auth_basic_user_file /usr/local/www/nagios/.htpasswd;

alias /usr/local/www/nagios;
index index.php;
location ~ \.php$ {
  fastcgi_index index.php;
  fastcgi_pass unix:/var/run/php-fpm.sock;
  fastcgi_param SCRIPT_FILENAME $request_filename;
  include fastcgi_params;
}
location ~ \.cgi$ {
  try_files $uri =404;
  include fastcgi_params;
  fastcgi_pass unix:/var/run/fcgiwrap/fcgiwrap.sock;
  fastcgi_param SCRIPT_FILENAME $request_filename;
  fastcgi_param REMOTE_USER $remote_user;
}
}
( echo -n "[B]nagiosadmin[/B]:" ; openssl passwd -salt SALT -crypt [B]admin[/B] ) > /usr/local/www/nagios/.htpasswd;
service php-fpm start
service fcgiwrap start
service nginx start
service nagios start


visit the /nagios folder on the server, you should be asked to authenticate (user: nagiosadmin, passwd: admin).

If everything is successful, you should be seeing this. The column on the left was generated with PHP, while the text was from CGI.

nagios-good.png


Problems
These are the files to look in:

/var/log/nginx/*.log
/var/log/php-fpm.log

You may also want to add to /etc/rc.conf
fcgiwrap_flags="-f"
which redirects errors into the web server log (/dev/null is the default).

sockstat -l
Code:
USER CMD      PROTO  LOCAL ADDRESS
www  fcgiwrap stream /var/run/fcgiwrap/fcgiwrap.sock
www  nginx    tcp4   *:80
www  php-fpm  stream /var/run/php-fpm.sock
ls -l /var/run/fcgiwrap/fcgiwrap.sock /var/run/pgp-fpm.sock
Code:
srwxr-xr-x www wheel /var/run/fcgiwrap/fcgiwrap.sock
srw-rw---- www www   /var/run/php-fpm.sock
 
Last edited:

gutiersa

Member

Reaction score: 6
Messages: 61

Hi, thanks so much for posting this tutorial. I actually tried this, but I am getting this error:
"nagios assertion failed: (!argv[argc]), function perl_parse, file perl.c line 1696"
I am kind of lost. I would appreciate some insight.
Thanks.
 

gutiersa

Member

Reaction score: 6
Messages: 61

The problem was that I had installed nagios version 3 rather than version 4 which was compatible with my version of FreeBSD 12.1
 
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