check server availability from zabbix proxies

zabbix_check_availability.sh

#!/bin/bash
# Usage: ./zabbix_check_availability.sh my-server.local
#
# If you run it as root:
# You need to have "zabbix_get" executable binary on each proxy 
# in the /root dir, and set passwordless ssh authentication.
# v. 20240118
# https://gist.github.com/qiwichupa/39e47db270a070e1dafa2eb14033d1c5

PROXYLIST=(zabbix-proxy1.local
           zabbix-proxy2.local
           zabbix-proxy3.local)

R='\033[0;31m'
G='\033[0;32m'
N='\033[0m'

check_agent_port() {
  proxy=$1
  server=$2
  port=$3

  echo -n "${port}: "
  r=$(ssh $proxy "timeout 3 ./zabbix_get -k agent.version -p $port -s $server  > /tmp/zget_resp  2>&1  && echo open || if [[ "\$?" == "124" ]]; then echo timeout > /tmp/zget_resp; echo failed, \$(cat /tmp/zget_resp); else  echo failed, \$(cat /tmp/zget_resp); fi;")
  if [[ "$r" == "open" ]];
  then
     echo -e ${G}${r}, $(ssh $proxy "timeout 3 ./zabbix_get -k agent.version -p $port -s $server "), $(ssh $proxy "timeout 3 ./zabbix_get -k system.uname -p $port -s $server")${N}
  else
     echo -e ${R}${r}${N}
  fi
}


echo $server
echo ---------------------------------
for PRX in ${PROXYLIST[@]}; do
  echo ${PRX}:
  echo -n "ping: "
  r=$(ssh $PRX "timeout 3 ping -c 2 $server  > /dev/null 2>&1  && echo ok || echo failed")
  if [[ "$r" == "ok" ]];
  then
     echo -e ${G}${r}${N}
  else
     echo -e ${R}${r}${N}
  fi

  check_agent_port "${PRX}" "$server" "10050"
  # custom port check: 
  # check_agent_port "${PRX}" "$server" "10060"
done