500-zabbix-agent

#!/bin/bash
# Setup the Zabbix agent

source common

INIT apt-remove --header "Removing existing Zabbix agents" -m purge --lazy zabbix-agent zabbix-agent2

INIT status "Setup Zabbix-Agent (+Plugins)"
INIT apt-install-url "https://repo.zabbix.com/zabbix/7.4/release/ubuntu/pool/main/z/zabbix-release/zabbix-release_7.4-0.2+ubuntu$(lsb_release -rs)_all.deb"
INIT apt-update

INIT apt-install \
	zabbix-agent2 \
	zabbix-agent2-plugin-mongodb \
	zabbix-agent2-plugin-postgresql \


if [ -e "/etc/zabbix/zabbix_agentd.psk" ]; then
	INIT skip "Generate Zabbix PSK Key"
else
	INIT status "Generate Zabbix PSK key"
	sudo sh -c "openssl rand -hex 32 > /etc/zabbix/zabbix_agentd.psk"
	PSK=`cat /etc/zabbix/zabbix_agentd.psk`

	echo
	echo "Zabbix agent setup to continue with PSK [name = `hostname`] [PSK = [ $PSK ]]"
	echo
	echo "Press enter to continue, when this has been noted"
	echo
	read
fi


echo
echo "Enter upstream Zabbix server address"
ZABBIX_SERVER=`INIT ask --prompt "Zabbix Server" --var "PROFILE_ZABBIX_SERVER"`
echo

INIT status "Configure Zabbix-agent"
THIS_HOST=`hostname`
INIT file-set "/etc/zabbix/zabbix_agent2.conf" <<EOF
# Zabbix+Init v1.4
PidFile=/var/run/zabbix/zabbix_agentd.pid
LogFile=/var/log/zabbix/zabbix_agentd.log
LogFileSize=128

# Enable for debugging
# DebugLevel=4

Server=$ZABBIX_SERVER
ServerActive=$ZABBIX_SERVER
Hostname=$THIS_HOST
TLSConnect=psk
TLSAccept=psk
TLSPSKIdentity=$THIS_HOST
TLSPSKFile=/etc/zabbix/zabbix_agentd.psk

EnablePersistentBuffer=1
PersistentBufferPeriod=3h
PersistentBufferFile=/run/zabbix/zabbix-buffer.sqli

PluginSocket=/run/zabbix/agent.plugin.sock
ControlSocket=/run/zabbix/agent.sock

ForceActiveChecksOnStart=1
Include=/etc/zabbix/zabbix_agent2.d/plugins.d/*.conf
EOF

sudo systemctl restart zabbix-agent2
sudo systemctl enable zabbix-agent2


INIT status "Installing Firewall rule"
sudo ufw allow 10050/tcp