FreeBSD support

[Schueni1]

Does this work under FreeBSD? I could not find it in https://www.freshports.org/

[Subito]

Yes, as far as I can tell it compiles and runs fine on FreeBSD. A Port is missing so far, but a simple go get github.com/kumina/postfix_exporter should get you started.

[sgohl]

just confirming it works on FreeBSD with the binary copied from another FreeBSD system where I installed pkg install go and run go install github.com/kumina/postfix_exporter@latest so the actual target system does not need to have go installed.

./postfix_exporter --postfix.logfile_path="/var/log/maillog"

I've stolen the rc-script for /usr/local/etc/rc.d/postfix_exporter from node_exporter:

#!/bin/sh

# PROVIDE: postfix_exporter
# REQUIRE: LOGIN
# KEYWORD: shutdown
#
# Add the following lines to /etc/rc.conf.local or /etc/rc.conf
# to enable this service:
#
# postfix_exporter_enable (bool):          Set to NO by default.
#               Set it to YES to enable postfix_exporter.
# postfix_exporter_user (string):          Set user that postfix_exporter will run under
#               Default is "nobody".
# postfix_exporter_group (string):         Set group that postfix_exporter will run under
#               Default is "nobody".
# postfix_exporter_args (string):          Set extra arguments to pass to postfix_exporter
#               Default is "".
# postfix_exporter_listen_address (string):Set ip:port that postfix_exporter will listen on
#               Default is ":9154".
# postfix_exporter_textfile_dir (string):  Set directory that postfix_exporter will watch
#               Default is "/var/tmp/postfix_exporter".

. /etc/rc.subr

name=postfix_exporter
rcvar=postfix_exporter_enable

load_rc_config $name

: ${postfix_exporter_enable:="NO"}
: ${postfix_exporter_user:="root"}
: ${postfix_exporter_group:="postfix"}
: ${postfix_exporter_listen_address:=":9154"}
: ${postfix_exporter_textfile_dir:="/var/tmp/postfix_exporter"}
: ${postfix_exporter_logfile_path:="/var/log/maillog"}

pidfile=/var/run/postfix_exporter.pid
command="/usr/sbin/daemon"
procname="/usr/local/bin/postfix_exporter"
command_args="-f -p ${pidfile} -T ${name} \
    /usr/bin/env ${procname} \
    --postfix.logfile_path=${postfix_exporter_logfile_path} \
    --web.listen-address=${postfix_exporter_listen_address}"

start_precmd=postfix_exporter_startprecmd

postfix_exporter_startprecmd()
{
    if [ ! -e ${pidfile} ]; then
        install \
            -o ${postfix_exporter_user} \
            -g ${postfix_exporter_group} \
            /dev/null ${pidfile};
    fi
}

load_rc_config $name
run_rc_command "$1"