Custom metrics is not showing in prometheus web ui so does in grafana - docker

Question

First of all I tried this solution didn't work for me.
I need to log some custom metrics using Prometheus.
docker-compose.yml
version: "3"
volumes:
prometheus_data: {}
grafana_data: {}
services:
prometheus:
image: prom/prometheus:latest
container_name: prometheus
hostname: my_service
ports:
- 9090:9090
depends_on:
- my_service
my-service:
build: .
ports:
- 8080:8080
grafana:
image: grafana/grafana:latest
container_name: grafana
hostname: grafana
ports:
- 3000:3000
depends_on:
- prometheus
prometheus.yml
global:
scrape_interval: 5s
scrape_timeout: 10s
external_labels:
monitor: 'my-project'
rule_files:
scrape_configs:
- job_name: myapp
scrape_interval: 10s
static_configs:
- targets:
- my_service:8080
I tried external ip as well, but i can't see my metrics in prometheus UI. Also, the target page is showing localhost:9090 is up.
What could be the problem? Can anyone correct the docker compose and prometheus file?
Thanks

Answer 1

So I found it. I have to set my scrape configs with the container name. something like this
scrape_configs:
- job_name: my-service
scrape_interval: 15s
scrape_timeout: 10s
metrics_path: /metrics
static_configs:
- targets:
- 'prometheus:9090'
- 'my-service:8080'
Once you fix your Prometheus volumes to your data, you will see your service is up and running at http://localhost:9090/targets