How to make Prometheus setup via docker-compose reads a certain prometheus.yml file

[Shutima Potivorakun]

Hello all,

I am new to Prometheus and docker-compose. I have a project structure with docker-compose.yml file that setup Prometheus and Grafana:

"/prometheus-grafana/prometheus/docker-compose.yml"

version: '3'

services:

prometheus:

image: prom/prometheus:v2.21.0

ports:

- 9000:9090

volumes:

- ./prometheus:/etc/prometheus

- prometheus-data:/prometheus

command: --web.enable-lifecycle --config.file=/etc/prometheus/prometheus.yml

grafana:

image: grafana/grafana:$GRAFANA_VERSION

environment:

GF_SECURITY_ADMIN_USER: $GRAFANA_ADMIN_USER

GF_SECURITY_ADMIN_PASSWORD: $GRAFANA_ADMIN_PASSWORD

ports:

- 3000:3000

volumes:

- grafana-storage:/var/lib/grafana

depends_on:

- prometheus

networks:

- internal

networks:

internal:

volumes:

prometheus-data:

grafana-storage:

I just added more config in "/prometheus-grafana/prometheus/prometheus/prometheus.yml" like this, the part that I added is yellow highlighted:

global:

scrape_interval: 30s

scrape_timeout: 10s

rule_files:

- alert.yml

scrape_configs:

- job_name: services

metrics_path: /metrics

static_configs:

- targets:

- 'prometheus:9090'

- 'idonotexists:564'

- job_name: myapp

scrape_interval: 10s

static_configs:

- targets:

- localhost:2112

I started Prometheus by running: "docker-compose up -d", I got to Prometheus on "http://localhost:9000/graph" but I don't see the new config I added to "prometheus.yml", in docker-compose.yml file, there is a line "command: --web.enable-lifecycle --config.file=/etc/prometheus/prometheus.yml" Am I supposed to change this to refers to the path of my another Prometheus.yml in my project?

Thank you in advance.

Rgds,

Shutima Potivorakun

[sayf.eddi...@gmail.com]

If you have an error in the config file, prometheus will just ignore the new config and stays with the old one, check the logs of the container and make sure there are not errors

[Shutima Potivorakun]

Hello, I checked docker-compose log, I don't see any error but I saw that it loads prometheus.yml file from here and NOT from my project. I should change this directory to load instead from my project and not from /etc/prometheus ?

prometheus_1  | 2021-04-12T09:34:28.726678910Z level=info ts=2021-04-12T09:34:28.726Z caller=main.go:850 msg="Loading configuration file" filename=/etc/prometheus/prometheus.yml