Docker Container with multiple instances -> Change Port

Grafana
1

Hi Guys,

i created a new docker-stack where i would need several influxdb instances, which i can’t connect to my grafana container atm. Here is a port of my docker-compose.yml

services:
grafana:
image: grafana/grafana
container_name: grafana
restart: always
ports:
- 3000:3000
networks:
- monitoring
volumes:
- grafana-volume:/var/lib/grafana

influxdb:
image: influxdb
container_name: influxdb
restart: always
ports:
- 8086:8086
networks:
- monitoring
volumes:
- influxdb-volume:/var/lib/influxdb

influxdb-2:
image: influxdb
container_name: influxdb-2
restart: always
ports:
- 12380:12380
networks:
- monitoring
volumes:
- influxdb-volume-2:/var/lib/influxdb

When i try to create a new influxdb datasource in grafana with influxdb-2 i get a Network Error: Bad Gateway(502), the logfile is showing:

2782ca98a4d7_grafana | 2019/10/05 13:18:50 http: proxy error: dial tcp 172.20.0.4:12380: connect: connection refused

Any ideas?

Thanks