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File: //lib64/nagios/plugins/check_a2_extra_ips.shared
#!/bin/bash
# Ref - SYSENG-21578 - add backup network IP to cPanel Reserved IP list if not exists already
#                    - alert if an SRT has less than 2 dedicated IPs available
#

local_ip=$(ifconfig | grep "inet 10\." | awk '{print $2}')
reserved_ips="/etc/reservedips"
available_ips=$(wc -l < /etc/ipaddrpool)
minimum_ips="2"

# if local IP 10. exists, reserve it and rebuild ip pool
reserve_private_ip() {
  if [ -n "${local_ip}" ]; then
    if ! grep -q "${local_ip}" "${reserved_ips}"; then
      echo "Adding ${local_ip} and rebuilding ip pool"
      echo "${local_ip}" >> "${reserved_ips}"
      /scripts/rebuildippool
    fi
  fi
}

reserve_private_ip >> /var/log/check_extra_ips.log

if [ "${available_ips}" -lt "${minimum_ips}" ]; then
  echo "this server has ${available_ips} dedicated ip(s) available, please add /28 ips"
  exit 1
fi