generate_latest() for MultiProcessing writes both the MultiProcess Metrics and per Process Metrics

[Mariam Sawires]

Hi,

I guess the title says it all but using Gunicorn multiprocessing environment and creating a CollectorRegistry() that is passed into MultiProcessorCollector()... then doing generate_latest() on that registry, I get both keys for MultiProcess metrics and per Process Metrics. However, I would like to only see the MultiProcess Metrics and ignore the per Process Metrics. Is there a way to do that?

Here's my code for clarity:

```

import time

from flask import request, Response

from prometheus_client.multiprocess import MultiProcessCollector

from prometheus_client import generate_latest, CollectorRegistry, Counter, Histogram, CONTENT_TYPE_LATEST

REGISTRY = CollectorRegistry()

FLASK_REQUEST_LATENCY = Histogram(

    'flask_request_latency_seconds',

    'Flask Request Latency',

    ['method', 'endpoint'],

    registry=REGISTRY

)

FLASK_REQUEST_COUNT = Counter(

    'flask_request_count',

    'Flask Request Count',

    ['method', 'endpoint', 'http_status'],

    registry=REGISTRY

)

def configure_metrics(app):

    MultiProcessCollector(REGISTRY)

    @app.before_request

    def before_request():

        request.start_time = time.time()

    @app.after_request

    def after_request(response):

        request_latency = time.time() - request.start_time

        FLASK_REQUEST_LATENCY.labels(request.method, request.path).observe(request_latency)

        FLASK_REQUEST_COUNT.labels(request.method, request.path, response.status_code).inc()

        return response

    @app.route('/metrics')

    def metrics():

        output = generate_latest(REGISTRY)

        return Response(output, mimetype=CONTENT_TYPE_LATEST)

```

Thanks,
Mariam

[Brian Brazil]

On 17 March 2017 at 20:22, Mariam Sawires <mar...@unata.com> wrote:

Hi,

I guess the title says it all but using Gunicorn multiprocessing environment and creating a CollectorRegistry() that is passed into MultiProcessorCollector()... then doing generate_latest() on that registry, I get both keys for MultiProcess metrics and per Process Metrics. However, I would like to only see the MultiProcess Metrics and ignore the per Process Metrics. Is there a way to do that?

Here's my code for clarity:

```

import time

from flask import request, Response

from prometheus_client.multiprocess import MultiProcessCollector

from prometheus_client import generate_latest, CollectorRegistry, Counter, Histogram, CONTENT_TYPE_LATEST

REGISTRY = CollectorRegistry()

You should follow the example at https://github.com/prometheus/client_python#multiprocess-mode-gunicorn exactly, and create the registry only per metrics request.

Brian

 

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Brian Brazil

www.robustperception.io