Getting container host metrics when running Telegraf inside Docker - telegraf

Question

I've got a docker compose service with a bunch of containers and I am attempting to collect both the docker container metrics from these containers but also the container host metrics from the Ubuntu server the containers are running on. I'm getting the docker container stats but I am not getting the Ubuntu container host metrics. The stats from the non-docker based input plugins (inputs.diskio,inputs.mem, etc) are from the telegraf container.
I found this and opened up the volumes but still nothing: https://community.influxdata.com/t/how-can-we-collect-host-machine-metrics-while-telegraf-is-running-in-docker-container/12005
Here is my compose file:
version: "3"
services:
telegraf:
image: telegraf:1.20.3
volumes:
- ./telegraf.conf:/etc/telegraf/telegraf.conf:ro
- /var/run/docker.sock:/var/run/docker.sock:ro
- /sys:/rootfs/sys:ro
- /proc:/rootfs/proc:ro
- /etc:/rootfs/etc:ro
environment:
HOST_PROC: /rootfs/proc
HOST_SYS: /rootfs/sys
HOST_ETC: /rootfs/etc
vote:
build: ./vote
# use python rather than gunicorn for local dev
command: python app.py
depends_on:
- redis
volumes:
- ./vote:/app
ports:
- "5000:80"
networks:
- front-tier
- back-tier
result:
build: ./result
# use nodemon rather than node for local dev
command: nodemon server.js
depends_on:
- db
volumes:
- ./result:/app
ports:
- "5001:80"
- "5858:5858"
networks:
- front-tier
- back-tier
worker:
build:
context: ./worker
depends_on:
- redis
- db
networks:
- back-tier
redis:
image: redis:5.0-alpine3.10
volumes:
- "./healthchecks:/healthchecks"
healthcheck:
test: /healthchecks/redis.sh
interval: "5s"
ports: ["6379"]
networks:
- back-tier
db:
image: postgres:9.4
environment:
POSTGRES_USER: "postgres"
POSTGRES_PASSWORD: "postgres"
volumes:
- "db-data:/var/lib/postgresql/data"
- "./healthchecks:/healthchecks"
healthcheck:
test: /healthchecks/postgres.sh
interval: "5s"
networks:
- back-tier
volumes:
db-data:
networks:
front-tier:
back-tier:
Here is the agent config:
[agent]
interval = "10s"
[[inputs.mem]]
[[inputs.disk]]
## Ignore mount points by filesystem type.
ignore_fs = ["tmpfs", "devtmpfs", "devfs", "iso9660", "overlay", "aufs", "squashfs"]
[[inputs.diskio]]
[[inputs.kernel]]
[[inputs.ethtool]]
[[inputs.procstat]]
pattern = ".*"
[[inputs.docker]]
endpoint = "unix:///var/run/docker.sock"
gather_services = false
container_names = []
source_tag = true
container_name_include = []
container_name_exclude = []
timeout = "5s"
perdevice = true
docker_label_include = []
docker_label_exclude = []
[[inputs.cpu]]
percpu = true
totalcpu = true
collect_cpu_time = true
report_active = true
How do I get the container host metrics??