check_haproxy_health

#!/bin/bash
# ======================================================================
#
# NAGIOS CLIENT CHECK :: haproxy healthcheck
#
# ----------------------------------------------------------------------
# 
# ----------------------------------------------------------------------
# 2020-04-27  v1.0  <axel.hahn@iml.unibe.ch>
# 2020-05-04  v1.1  <axel.hahn@iml.unibe.ch>  show message if monitor-uri was not set
# ======================================================================

. `dirname $0`/inc_pluginfunctions

cfgfile=/etc/haproxy/haproxy.cfg
tmpfile=/tmp/check_haproxy_healthcheck_$$



# ----------------------------------------------------------------------
# pre checks
# ----------------------------------------------------------------------
ph.reqire wget

cat $cfgfile >/dev/null
if [ $? -ne 0 ]; then
  ph.abort "UNKNOWN: unable to read ha proxy config $cfgfile ... `ls -l $cfgfile`"
fi

cat $cfgfile | grep "\ mode\ .*http" >/dev/null
if [ $? -ne 0 ]; then
  ph.abort "UNKNOWN: haproxy is not in http mode"
fi


# ----------------------------------------------------------------------
# build url
# ----------------------------------------------------------------------

proto=http
auth=
host=localhost
port=80
uri=

uri=` cat $cfgfile | grep "\ monitor-uri\ " | awk '{ print $2 }'`

if [ -z "$uri" ]; then
  ph.abort "UNKNOWN: no monitor-uri setting was found in the config $cfgfile."
fi

cat $cfgfile | grep "bind\ .*\ ssl\ " >/dev/null && proto=https
port=`cat $cfgfile | grep "\ bind\ "        | awk '{ print $2 }' | cut -f 2 -d ':'`

url="$proto://${host}:${port}${uri}"


# ----------------------------------------------------------------------
# check output
# ----------------------------------------------------------------------

# --- get status page
wget --no-check-certificate -O $tmpfile $url 2>/dev/null
if [ $? -ne 0 ]; then
  rm -f $tmpfile
  ph.abort "UNKNOWN: url $url did not respond. `wget --no-check-certificate -O - -S $url`"
fi

grep "200 OK" $tmpfile >/dev/null
if [ $? -ne 0 ]; then
  ph.setStatus "error"
  ph.status "url did not contain 200 OK. `wget --no-check-certificate -O - -S $url`"
else
  ph.status "HA Proxy is up and running."
fi

rm -f $tmpfile

ph.exit

# ----------------------------------------------------------------------