Docker cadvisor connection refused - docker

Question

I'm having this issue with docker compose running cadvisor and prometheus.
DNS resolution is working for cadvisor
When internet is allowed for cadvisor, prometheus is able to connect to agent using public-ip:8081.
version: '3.7' networks: monitoring:
driver: bridge volumes: prometheus_data: {} services: prometheus:
image: prom/prometheus:latest
user: "1000"
environment:
- PUID=1000
- PGID=1000
container_name: prometheus
restart: unless-stopped
volumes:
- /home/sammantar/sammantar/Project/OpenSourceMonitoring/promgrafnode/prometheus/prometheus.yml:/etc/prometheus/prometheus.yml
- /home/sammantar/sammantar/Project/OpenSourceMonitoring/promgrafnode/prometheus:/prometheus
command:
- '--config.file=/etc/prometheus/prometheus.yml'
- '--storage.tsdb.path=/prometheus'
- '--web.console.libraries=/etc/prometheus/console_libraries'
- '--web.console.templates=/etc/prometheus/consoles'
- '--web.enable-lifecycle'
ports:
- "9090:9090"
networks:
- monitoring
cadvisor:
image: gcr.io/cadvisor/cadvisor:latest
container_name: cadvisor
ports:
- "127.0.0.1:8081:8080"
# network_mode: "host"
networks:
- monitoring
volumes:
- /:/rootfs:ro
- /var/run:/var/run:rw
- /sys:/sys:ro
- /var/lib/docker/:/var/lib/docker:ro
depends_on:
- redis
deploy:
mode: global
networks:
- monitoring
```
Is there any allowed-ip list in the cadvisor or a issue with iptables.
yaml
global:
scrape_interval: 1m
scrape_configs:
- job_name: "prometheus" (Working)
scrape_interval: 1m
static_configs:
- targets: ["localhost:9090"]
- job_name: "node" (Working)
static_configs:
- targets: ["node-exporter:9100"]
- job_name: "cadvisor" (not working)
scrape_interval: 5s
static_configs:
- targets: ["cadvisor:8081"]
Tried to using private ip address for cadvisor container, connection refused
Tried using container alias name, connection refused
Published cadvisor contianer to internet, connection accepted to public-ip:8081
I don't want to publish cadvisor over internet.
[RESOLVED]
global:
scrape_interval: 1m
scrape_configs:
- job_name: "prometheus" (Working)
scrape_interval: 1m
static_configs:
- targets: ["localhost:9090"]
- job_name: "node" (Working)
static_configs:
- targets: ["node-exporter:9100"]
- job_name: "cadvisor" (not working)
scrape_interval: 5s
static_configs:
- targets: ["cadvisor:**8080**"]
I thought the mapped port on the left side was used when containers connect to each other. 8081:8080, switched to 8080 and it worked thanks to #anemyte