Telegraf docker input reports 0 bytes memory usage on Raspberry Pi OS

[Barsonax]

Relevant telegraf.conf:

[agent]
  interval = "10s"

[[outputs.influxdb]]
  urls = ["http://influxdb:8086"]
  skip_database_creation = true
   database = "db0"
  password = "admin"

[[inputs.docker]]
  endpoint = "unix:///var/run/docker.sock"

System info:

• Telegraf 1.15.2 running in a docker container
• Raspberry pi 4 running Raspberry Pi OS (32-bit) Lite

Docker

Below is my full compose file to help reproducing:

version: '3'
services:
  reverse-proxy:
    # The official v2 Traefik docker image
    image: traefik:v2.2
    # Enables the web UI and tells Traefik to listen to docker
    command:   
      - "--log.level=DEBUG"
      - "--api.insecure=true"
      - "--providers.docker"
      - "--providers.docker.exposedbydefault=false"
      - "--entrypoints.mqtt.address=:1883"
      - "--entrypoints.http.address=:80"
    ports:
      # The HTTP port
      - "80:80"
      # The Web UI (enabled by --api.insecure=true)
      - "8080:8080"
      # Mosquitto
      - "1883:1883"
    volumes:
      # So that Traefik can listen to the Docker events
      - /var/run/docker.sock:/var/run/docker.sock
      - ./docker/treafik:/etc/traefik/

  telegraf:
    image: telegraf:1.15.2
    command: telegraf -config /etc/telegraf/telegraf.toml
    volumes:
      - ./docker/telegraf:/etc/telegraf
      - /var/run/docker.sock:/var/run/docker.sock

  homeassistant:
    image: homeassistant/home-assistant:stable
    depends_on: 
      - influxdb
      - mqtt
    volumes:
      - ./docker/homeassistant/config:/config
    environment:
      - TZ=Netherlands/Amsterdam
    labels:
      - "traefik.enable=true"
      - traefik.http.routers.homeassistant.entrypoints=http
      - traefik.http.routers.homeassistant.rule=Host(`homeassistant.local`,`homeassistant.localhost`)
      - traefik.http.services.homeassistant.loadbalancer.server.port=8123

  mqtt:
    image: eclipse-mosquitto
    volumes:
      - ./docker/mqtt/config:/mosquitto/config:ro
    labels:
      - "traefik.enable=true"
      - traefik.tcp.routers.mqtt.rule=HostSNI(`*`)
      - traefik.tcp.routers.mqtt.entrypoints=mqtt
      - traefik.tcp.services.mqtt.loadbalancer.server.port=1883

  grafana:
    image: grafana/grafana:7.1.5
    depends_on: 
      - influxdb
    volumes:
      - grafana-data:/var/lib/grafana
      - ./docker/grafana/provisioning/:/etc/grafana/provisioning:ro
    environment:
      - GF_SECURITY_ADMIN_USER=${GRAFANA_USERNAME}
      - GF_SECURITY_ADMIN_PASSWORD=${GRAFANA_PASSWORD}
      - GF_DASHBOARDS_DEFAULT_HOME_DASHBOARD_PATH=/etc/grafana/provisioning/dashboards/home.json
      - GF_AUTH_DISABLE_LOGIN_FORM=true
      - GF_AUTH_ANONYMOUS_ENABLED=true
      - GF_AUTH_ANONYMOUS_ORG_NAME=Main Org.
      - GF_AUTH_ANONYMOUS_ORG_ROLE=Editor
      - GF_USERS_ALLOW_SIGN_UP=false
    labels:
      - "traefik.enable=true"
      - traefik.http.routers.grafana.entrypoints=http
      - traefik.http.routers.grafana.rule=Host(`homedashboard.local`,`homedashboard.localhost`)
      - traefik.http.services.grafana.loadbalancer.server.port=3000

  influxdb:
    image: influxdb:1.8.1
    volumes:
      - influxdb-data:/var/lib/influxdb
    environment:
      - INFLUXDB_DB=db0
      - INFLUXDB_ADMIN_USER=${INFLUXDB_USERNAME}
      - INFLUXDB_ADMIN_PASSWORD=${INFLUXDB_PASSWORD}

  portainer:
    image: portainer/portainer
    volumes:
      - /var/run/docker.sock:/var/run/docker.sock
      - portainer_data:/data
    labels:
      - "traefik.enable=true"
      - traefik.http.routers.portainer.entrypoints=http
      - "traefik.http.routers.portainer.rule=Host(`portainer.local`,`portainer.localhost`)"
      - traefik.http.services.portainer.loadbalancer.server.port=9000

volumes:
  grafana-data:
  influxdb-data:
  portainer_data:

Steps to reproduce:

1. Check telegraf output in grafana
2. It will report 0 bytes memory usage

Expected behavior:

Seeing the memory usage. Locally on my windows 10 machine this does work.

Actual behavior:

Memory usage is 0 bytes.

Additional info:

Cpu metrics seem to be fine. Its just the memory thats somehow being reported as 0.

Query for the panel above: SELECT mean("usage") FROM "docker_container_mem" WHERE $timeFilter GROUP BY time($__interval), "com.docker.compose.service" fill(null)

[amuttsch]

Memory control groups are disabled on raspberry pi. Add the following to your /boot/cmdline.txt to enable this metic:

cgroup_enable=memory cgroup_memory=1.

See also: https://stackoverflow.com/questions/47520693/raspbian-docker-error-response-from-daemon-cgroups-memory-cgroup-not-supporte