https://repo.zabbix.com/zabbix/5.2/debian/pool/main/z/zabbix-release/

* Debian 10.0
wget https://repo.zabbix.com/zabbix/5.2/debian/pool/main/z/zabbix-release/zabbix-release_5.2-1+debian10_all.deb
dpkg -i zabbix-release_5.2-1+debian10_all.deb
apt update

* Install Zabbix Agent
apt install zabbix-agent -y  or 
apt install zabbix-agent2 -y

* Configuration
vim /etc/zabbix/zabbix-agent.conf ou vim /etc/zabbix/zabbix-agent2.conf 
############ GENERAL PARAMETERS #################
# Option: PidFile
PidFile=/run/zabbix/zabbix_agentd.pid

# Option: LogFile
LogFile=/var/log/zabbix/zabbix_agentd.log

# Option: LogFileSize
#	0 - disable automatic log rotation.
#
# Mandatory: no
# Range: 0-1024
# Default:
# LogFileSize=1

LogFileSize=0
# Passive checks
Server=127.0.0.1
# Active checks
ServerActive=127.0.0.1

# Option: Hostname
Hostname=zabbixserver

# Option: Include
Include=/etc/zabbix/zabbix_agentd.d/*.conf
--------------------------------------------------

* Monitoramento Mysql com Agente
cp /usr/share/doc/zabbix-agent/userparameter_mysql.conf /etc/zabbix/zabbix-agent.d/

CREATE USER 'zabbixmon'@'%' IDENTIFIED BY '<sua_senha>';
GRANT USAGE,REPLICATION CLIENT,PROCESS,SHOW DATABASES,SHOW VIEW ON *.* TO 'zabbixmon'@'%';
FLUSH PRIVILEGES;
quit;

mkdir -p /var/lib/zabbix
chown zabbix. -R /var/lib/zabbix/

vim /var/lib/zabbix/.my.cnf
[client]
user=zabbixmon
password=

systemctl restart zabbix-agent

#Teste
su zabbix -s /bin/bash
zabbix_agentd -t mysql.ping[localhost,3306]