#!/bin/sh

: <<=cut

=head CONFIGURATION

    Plugin to monitor php-fpm process manager, php-fpm >=5.3.3 is required

    INSTALLATION
    1. Install curl or wget
    2. Configure PHP to respond to status request by setting pm.status_path in your php fpm config file. 
    3. Configure your websever to respond to this path, it's advisable to restrict
    this to localhost
    4. Configure munin-node with a url environment variable for the url you wish to test

    You can use symlinks and config files to monitor multiple pools
    ln -s /usr/share/munin/php_fpm_status /usr/share/munin/php_fpm_status_www
    ln -s /usr/share/munin/php_fpm_status /usr/share/munin/php_fpm_status_www2

    [php_fpm_status_www]
    env.url http://127.0.0.1/fpm-status-www
    [php_fpm_status_www2]
    env.url http://127.0.0.1/fpm-status-www2

=head COPYRIGHT

    Copyright (C) 2020 Rowan Wookey <https://www.rwky.net>
    Copyright (C) 2011 Daniel Caillibaud
    Copyright (C) 2010 radar AT aol DOT pl

=head LICENSE

   This program is free software: you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation, either version 3 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program.  If not, see <https://www.gnu.org/licenses/>.

=head MAGIC MARKERS

    #%# family=auto
    #%# capabilities=autoconf

=cut

url=${url:-'http://127.0.0.1/fpm-status'}

if command -v wget > /dev/null 2>&1
then
    data=$(wget -O - -q "$url")
elif command -v curl > /dev/null 2>&1
then
    data=$(curl -s "$url")
else
    echo "wget or curl must be installed" >&2
    exit 1
fi

pool=$(echo "$data" | awk '/pool/{print $2}')

if [ "$1" = "autoconf" ]
then
    if [ -n "$pool" ]
    then
        echo 'yes'
    fi
    exit 0
fi

if [ "$1" = "config" ]; then
    echo "graph_title php-fpm status $pool"
    echo "graph_args --base 1000 -l 0"
    echo "graph_vlabel Processes"
    echo "graph_scale yes"
    echo "graph_category webserver"
    echo "graph_info This graph shows the php-fpm process manager status from pool: $pool"
    echo "active.label Active processes"
    echo "active.type GAUGE"
    echo "active.draw AREA"
    echo "active.info The number of active processes"
    echo "idle.label Idle processes"
    echo "idle.type GAUGE"
    echo "idle.draw STACK"
    echo "idle.info The number of idle processes"
    echo "total.label Total processes"
    echo "total.type GAUGE"
    echo "total.draw LINE2"
    echo "total.info The number of idle + active processes"
    exit 0
else
    echo "$data" | awk '
    /^idle/	{print "idle.value " $3}
    /^active/{print "active.value "   $3}
    /^total/ {print "total.value "  $3}
    '
fi