#!/bin/bash

# install snmp monitoring and configures it

# createUser <username> SHA "<auth password>" AES "<priv password>"
# rouser <username>
# #rwuser <username>

# make sure we are running as sudo
if [ "$EUID" -ne 0 ]; then
  echo "Please run as root"
  exit
fi

if [ -f /etc/debian_version ]; then
    apt update
    apt install -y snmpd curl
elif [ -f /etc/redhat-release ]; then
    yum install -y net-snmp net-snmp-utils
    firewall-cmd --zone=public --add-service=snmp --permanent
    firewall-cmd --reload
else
    echo "You are running an unsupported OS"
    echo "Support OSes: Debian, Ubuntu, CentOS"
    echo "Your OS: ${OS} ${OS_VER}"
    exit
fi


# back the original config file
mv /etc/snmp/snmpd.conf /etc/snmp/snmpd.conf.bak

# create new config file
cat <<EOF >> /etc/snmp/snmpd.conf
# Change RANDOMSTRINGGOESHERE to your preferred SNMP community string
com2sec readonly  default         GauntSNMP

group MyROGroup v2c        readonly
view all    included  .1                               80
access MyROGroup ""      any       noauth    exact  all    none   none

syslocation Rack, Room, Building, City, Country [GPSX,Y]
syscontact Your Name <your@email.address>

#Distro Detection
extend .1.3.6.1.4.1.2021.7890.1 distro /usr/bin/distro
EOF

# download distro script 
curl -o /usr/bin/distro https://raw.githubusercontent.com/librenms/librenms-agent/master/snmp/distro
chmod +x /usr/bin/distro

systemctl restart snmpd 

systemctl enable snmpd