Hello,
I am currently fighting a weird issue that I can’t seem to resolve : I am trying to mount a volume on / to allow some monitoring, but even though I am using the same version of docker on both, one server reports it correctly, but not the other one
docker-compose.yml
(Exactly the same on both servers)
version: '3.4'
networks:
monitor-net:
driver: bridge
services:
nodeexporter-text:
image: prom/node-exporter:v1.1.2
#image: quay.io/prometheus/node-exporter:latest
container_name: nodeexporter-test
volumes:
- /proc:/host/proc:ro
- /sys:/host/sys:ro
- /:/rootfs:ro
command:
- '--path.rootfs=/rootfs'
- '--path.procfs=/host/proc'
- '--path.sysfs=/host/sys'
#- '--collector.filesystem.mount-points-exclude=^/(sys|proc|dev|host|etc)($$|/)'
- '--collector.filesystem.ignored-mount-points=^/(sys|proc|dev|host|etc)($$|/)'
#- "--collector.filesystem.ignored-mount-points"
#- "^/(sys|proc|dev|host|etc|rootfs/var/lib/docker/containers|rootfs/var/lib/docker/overlay2|rootfs/run/docker/netns|rootfs/var/lib/docker/aufs)($$|/)"
pid: host
restart: unless-stopped
expose:
- 9100
networks:
- monitor-net
labels:
org.label-schema.group: "monitoring"
healthcheck:
test: ["CMD", "wget", "--tries=1", "--spider", "http://localhost:9100/metrics"]
interval: 10s
timeout: 5s
… started exactly the same way on both servers :
$ sudo docker-compose up -d
Starting nodeexporter-test ... done
Server “Jump” : /rootfs seen empty
$ df -h /
Filesystem Size Used Avail Use% Mounted on
/dev/md3 938G 31G 860G 4% /
$ sudo docker exec -it nodeexporter-test sh -c 'df -h /rootfs'
Filesystem Size Used Available Use% Mounted on
/dev/loop1 55.5M 55.5M 0 100% /rootfs
$ sudo docker --version
Docker version 20.10.7, build f0df350
$ sudo docker-compose --version
docker-compose version 1.29.2, build 5becea4c
$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 18.04.5 LTS
Release: 18.04
Codename: bionic
Server “API” /rootfs seen correctly
$ df -h /
Filesystem Size Used Avail Use% Mounted on
/dev/md2 848G 496G 309G 62% /
$ sudo docker exec -it nodeexporter-test sh -c 'df -h /rootfs'
Filesystem Size Used Available Use% Mounted on
/dev/md2 847.1G 495.0G 308.9G 62% /rootfs
$ sudo docker --version
Docker version 20.10.7, build f0df350
$ sudo docker-compose --version
docker-compose version 1.29.0, build 07737305
$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 18.04.5 LTS
Release: 18.04
Codename: bionic
Any suggestion would be greatly appreciated
Thanks in advance for your help
PS : I wasn’t sure where to post that in this forum, feel free to indicate a more appropriate section if needed !