Can i change distributor's base url in Grafana Tempo with Spring Boot?

Question

I have an application that consists of several microservices that I run in Docker. I'm currently learning observation and have already managed to connect logs with Loki, metrics with Prometheus and traces with Tempo. Logs and metrics works fine, but when I run the app, I get the following error from the services that are supposed to send their data:

Dropped 1 spans due to ResourceAccessException(I/O error on POST request for
"http://localhost:9411/api/v2/spans": Connect to http://localhost:9411
[localhost/127.0.0.1] failed: Connection refused)

As far as I understand, the problem is that the services cannot connect to the Tempo zipkin distributor service through http://localhost:9411 because it is located in container http://tempo:9411 (tempo - container name).

Here is the configuration:

tempo.yml

server:
  http_listen_port: 3110

distributor:
  receivers:
    zipkin:

storage:
  trace:
    backend: local
    local:
      path: /tmp/tempo/blocks

compose.yml

// Other services...

  tempo:
    container_name: tempo
    image: grafana/tempo:2.2.2
    command: [ "-config.file=/etc/tempo.yaml" ]
    volumes:
      - ./docker/tempo/tempo.yml:/etc/tempo.yaml:ro
      - ./docker/tempo/tempo-data:/tmp/tempo

    ports:
      - "3110:3100"  # Tempo
      - "9411:9411" # zipkin
    networks:
      - application-network

And my question is how can i change my distributor's base url from http://localhost:9411 to http://tempo:9411?

I looked for the answer on various sites and in the documentation but nothing worked.

Is this the whole compose.yml file ? It seems to be an excerpt. If so, could you please copy the whole content ? — nquincampoix
– nquincampoix, Commented Jan 5, 2024 at 7:37
No, it's not, i pasted only needed information from compose file. But i have already found the answer. This did not solve my problem, but it answers the question, so I will write below what needs to be done for this. Thank you for your interest! — Nikent
– Nikent, Commented Jan 6, 2024 at 10:10

Nikent · Accepted Answer · 2024-01-06 10:13:05Z

1

If someone is also facing this problem, it is solved very easily. All you have to do is to add parameter endpoint and provide needed url:

distributor:
  receivers:
    zipkin:
      endpoint: http://tempo:9411/api/v2/spans

answered Jan 6, 2024 at 10:13

Nikent

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