version: '3.7'
volumes:
  zabbix_alert_scripts:
    external: true
  zabbix_pgsql_database:
    external: true

services:
  postgresql-server:    # The Postgres Database Service
    image: postgres:13.5
    container_name: zabbix-postgresql
    restart: always
    environment:   # Username, password and database name variables
      POSTGRES_USER: zabbix_user
      POSTGRES_PASSWORD: TheVeryVeryBigzabbixPassw0rd_TobeReallyAndTotallySafe
      POSTGRES_DB: zabbix_db
      PG_DATA: /var/lib/postgresql/data/pgdata #data storage
    volumes:  # Volumes for databases
      - zabbix_pgsql_database:/var/lib/postgresql/data/pgdata
  
  zabbix-server:     # The main Zabbix Server Software Service
    image: zabbix/zabbix-server-pgsql:5.0-ubuntu-latest
    container_name: zabbix-mainserver
    restart: always
    environment:   # The Postgres database value variable
      POSTGRES_USER: zabbix_user
      POSTGRES_PASSWORD: TheVeryVeryBigzabbixPassw0rd_TobeReallyAndTotallySafe
      POSTGRES_DB: zabbix_db
      DB_SERVER_HOST: postgresql-server
      ZBX_HISTORYSTORAGETYPES: log,text #Zabbix configuration variables
      ZBX_DEBUGLEVEL: 1
      ZBX_HOUSEKEEPINGFREQUENCY: 1
      ZBX_MAXHOUSEKEEPERDELETE: 5000
    depends_on:
      - postgresql-server
    volumes:  # Volumes for scripts and related files you can add
      - zabbix_alert_scripts:/usr/lib/zabbix/alertscripts
  
  zabbix-web:    # The main Zabbix web UI or interface 
    image: zabbix/zabbix-web-apache-pgsql:5.0-ubuntu-latest
    restart: always
    container_name: zabbix-webserver
    environment:  # Postgre database variables
      POSTGRES_USER: zabbix_user
      POSTGRES_PASSWORD: TheVeryVeryBigzabbixPassw0rd_TobeReallyAndTotallySafe
      POSTGRES_DB: zabbix_db
      ZBX_SERVER_HOST: zabbix-server  # Zabbix related and Php variables
      ZBX_POSTMAXSIZE: 64M
      PHP_TZ: "Europe/Paris"
      ZBX_MAXEXECUTIONTIME: 500
    depends_on:
      - postgresql-server
      - zabbix-server
    ports:    # Port where Zabbix UI is available
      - 8090:80

  zabbix-agent:   # Zabbix agent service that tracks usage and send to zabbix server
    image: zabbix/zabbix-agent:latest
    privileged: true   #access mode for allowing resource access
    network_mode: "host"
    restart: unless-stopped
    environment:
      - ZBX_SERVER_HOST=127.0.0.1 #the IP/Dns of Zabbix server