Can I use prometheus to read another prometheus data?

[songjiayang]

I guess remote_read is the key word, So I do a test, there are my configs

prometheus1: (slave node)

scrape_configs:
  - job_name: 'prometheus1'
    static_configs:
      - targets: ['localhost:9090']

  - job_name: "node"
    static_configs:
      - targets: ["localhost:9100"]

prometheus 2: (master node)

scrape_configs:
  - job_name: 'prometheus2'
    static_configs:
      - targets: ['localhost:9091']

remote_read:
  - url: 'http://localhost:9090/api/v1/read'
    remote_timeout: 8s

I want prometheus2's query can list prometheus1's data, but it not.

My question is that remote_read is the right way and how to config it?

[juliusv]

Which Prometheus version(s) are you using? Remote read only got implemented Aug 3 in Prometheus 1.8.x and AFAIK does not exist in Prometheus 2.x yet.

[juliusv]

(and with that I mean the remote read server endpoint in Prometheus itself, not Prometheus being able to read remotely as a client, which has been there for a while)

[songjiayang]

@juliusv thank you, I use Prometheus 1.8.0.

You mean the remote read only can read data from remote storage rather than another Prometheus server ?

[juliusv]

@songjiayang No, starting with Prometheus 1.8.0, Prometheus itself should also be able to act as a remote read server, meaning that another Prometheus should be able to remotely read from it.

So I am not sure why it does not work for you. Are you just getting the results of the local server, or are you getting a query error? What query are you sending?

[songjiayang]

@juliusv I run two Prometheus server on my computer, I get data from the local server.

 ./prometheus -version

prometheus, version 1.8.0 (branch: HEAD, revision: 3569eef8b1bc062bb5df43181b938277818f365b)
  build user:       root@bd4857492255
  build date:       20171006-22:16:15
  go version:       go1.9.1

[Wing924]

Ability to act as a remote read endpoint for other Prometheus
servers.

I also want to know this detail about new feature from 1.8.0 :)

[grobie]

Please ask such questions on our mailing list. The issue tracker is only for bug reports and feature requests. See https://prometheus.io/community/ for more information.

[lock]

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