Using Prometheus with Aurora

[Brian Brazil]

Hi,

I've added support to Prometheus to use Twitter serversets for service discovery, and we're now got this deployed in production. A key point is that you can configure it to look at a tree of ZNodes in Zookeeper, so that it can automatically pick up any new jobs announced by the Aurora executor with no additional configuration required.

The scrape config we have in ansible for this is:

  - job_name: "aurora_job"
    serverset_sd_configs:
      - servers:
{% for host in groups["zookeeper"] %}
          - "{{ host }}:2181"
{% endfor %}
        paths:
          - "/aurora/serversets"
    relabel_configs:
      - source_labels: [ __meta_serverset_path ]
        regex: '^/aurora/serversets/[^/]+/[^/]+/([^/]+)/.*'
        target_label: job
        replacement: "${1}"
      - source_labels: [ __address__ ]
        regex: '(ip-\d+-\d+-\d+-\d+)\..*:(\d+)'
        target_label: __address__
        replacement: "${1}:${2}"

The relabel of the addresses is as our mesos slaves have the externally visible host names so they work nicely in the browser, but which don't actually exist in DNS so need some munging.

Note that you'll need the Prometheus at head to use this, and that this should also work for non-Aurora created serversets such as if you're using Finagle.

Relevant docs: 

http://aurora.apache.org/documentation/latest/configuration-reference/#announcer-objects 

http://prometheus.io/docs/operating/configuration/#zookeeper-serverset-sd-configurations-serverset_sd_config

Brian

[Bill Farner]

Great work, Brian!  This is awesome!

-=Bill

[Erb, Stephan]

Hi Brian,

that will come in handy. Thanks for that!

I have thought about using prometheus together with the Mesos and Aurora exporters. Your feature would even allow us to start both exports on Aurora and let Prometheus discover them automatically. However, it might be a bit risky to use Aurora/Mesos to host its own monitoring solution...

How have you organized the deployment of your Prometheus components?

Regards,
Stephan
________________________________________
From: Brian Brazil <brian....@boxever.com>
Sent: Wednesday, July 1, 2015 4:54 PM
To: d...@aurora.apache.org; prometheus-developers
Subject: Using Prometheus with Aurora

[Brian Brazil]

On 1 July 2015 at 18:06, Erb, Stephan <Steph...@blue-yonder.com> wrote:

Hi Brian,

that will come in handy. Thanks for that!

I have thought about using prometheus together with the Mesos and Aurora exporters. Your feature would even allow us to start both exports on Aurora and let Prometheus discover them automatically. However, it might be a bit risky to use Aurora/Mesos to host its own monitoring solution...

How have you organized the deployment of your Prometheus components?

Prometheus as-is is best considered a storage system in Mesos terms, so isn't really suitable for putting on Mesos unless you've a quite short retention period (hours?).

We're currently running Prometheus outside of Mesos via ansible+monit. 

When I get around to exporting metrics from the mesos, that'll also be via ansible+monit on each machine as that's cluster infrastructure and running it on mesos itself would just complicate things. I'll likely end up using EC2 service discovery for that (once it exists).

Brian

 

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