Spring Prometheus Grafana: Err reading Prometheus: Post "http://localhost:9090/api/v1/query-CodePudding

Hello I have an app in Spring Boot and I am exposing some metrics on Prometheus. My next goal is to provide these metrics on Grafana in order to obtain some beautiful dashboards. I am using docker on WSL Ubuntu and typed the next commands for Prometheus and Grafana:

docker run -d --name=prometheus -p 9090:9090 -v /mnt/d/Projects/Msc-Thesis-Project/prometheus.yml:/etc/prometheus/prometheus.yml prom/prometheus --config.file=/etc/prometheus/prometheus.yml

docker run -d --name=grafana -p 3000:3000 grafana/grafana

Below I am giving you the Prometheus dashboard in my browser and as you can see, everything is up and running. My problem is in Grafana configuration where I have to configure Prometheus as Data Source.

In the field URL I am providing the http://localhost:9090 but I am getting the following error:

Error reading Prometheus: Post "http://localhost:9090/api/v1/query": dial tcp 127.0.0.1:9090: connect: connection refused

I've searched everywhere and saw some workarounds that don't apply to me. To be specific I used the following:

CodePudding user response：

You can use the docker inspect command to find the IP address of the Prometheus container and then replace the localhost word with it.

CodePudding user response：

I'll suggest you to use docker-compose, which better supports in DNS resolving and your issues of localhost will get resolved.