docker - prometheus with snmp_exporter, node_exporter, and cadvisor

docker-compose.yml

version: "3"
services:
  prometheus:
    image: prom/prometheus
    volumes:
      - /opt/docker-persist/prometheus/data:/prometheus-data
    ports:
      - 9090:9090
    restart: always
    command: --config.file=/prometheus-data/prometheus.yml

  snmp:
    image: quay.io/prometheus/snmp-exporter
    volumes:
      - /opt/docker-persist/snmp-exporter:/etc/snmp_exporter
    ports:
      - 9116:9116
      - 116:116/udp
    restart: always
    command: --config.file=/etc/snmp_exporter/snmp.yml

  node_exporter:
    image: quay.io/prometheus/node-exporter
    volumes:
      - /proc:/host/proc:ro
      - /sys:/host/sys:ro
      - /:/rootfs:ro
    ports:
      - 9100:9100
    network_mode: host
    restart: always
    command:
      - --path.procfs=/host/proc
      - --path.sysfs=/host/sys
      - --collector.filesystem.ignored-mount-points="^/(sys|proc|dev|host|etc)($$|/)"

  cadvisor:
    image: google/cadvisor:latest
    volumes:
      - /:/rootfs:ro
      - /var/run:/var/run:rw
      - /sys:/sys:ro
      - /var/lib/docker/:/var/lib/docker:ro
      - /dev/disk/:/dev/disk:ro
    ports:
      - 8084:8080
    restart: always

Shouldn't the snmp UDP port be 161?

Shouldn't the snmp UDP port be 161?

snmp can be configured to listen on a different port but 161 is the default.