Enable prometheus metrics using helm chart

[jannotti-glaucio]

Guys, how can I enable Prometheus metrics using the official helm chart (https://github.com/distribworks/dkron-helm) ?

I did not find any way to set a config.yaml file to enable the enable-prometheus (as defined at https://dkron.io/docs/usage/metrics ) and tried to set this using env variables like DKRON_ENABLE_PROMETHEUS or DKRON_ENABLE-PROMETHEUS (as defined at https://dkron.io/docs/basics/configuration), but it did not work too.

Does anyone know another way to make it work ?

[xBlaz3kx]

I managed to expose metrics (on Docker) by setting DKRON_ENABLE_PROMETHEUS=true env variable and scraping the metrics on http://localhost:8080/metrics.

The docs have a typo in the configuration:

scrape_configs:
  ... #initial configuration
  
  - job_name: "dkron_metrics"
    # metrics_path defaults to '/metrics'
    static_configs:
      - targets: ["localhost:6080"] # should be localhost:8080

[jannotti-glaucio]

I'm using the helm chart version and it is not working.

I put the env variable using the envs tag like below:

  envs:
  - name: DKRON_ENABLE_PROMETHEUS
    value: true

And tried to access the endpoint http://localhost:8080/metrics locally in the pod and received HTTP 404.

[xBlaz3kx]

What does your values.yaml file look like? Have you overriden the image tag with the latest (v4.0.4)?

Seems like the chart is outdated, since it is using version 3.2.1 as a default:

apiVersion: v2
name: dkron
description: A Helm chart for dkron

# A chart can be either an 'application' or a 'library' chart.
#
# Application charts are a collection of templates that can be packaged into versioned archives
# to be deployed.
#
# Library charts provide useful utilities or functions for the chart developer. They're included as
# a dependency of application charts to inject those utilities and functions into the rendering
# pipeline. Library charts do not define any templates and therefore cannot be deployed.
type: application

# This is the chart version. This version number should be incremented each time you make changes
# to the chart and its templates, including the app version.
# Versions are expected to follow Semantic Versioning (https://semver.org/)
version: 2.0.3

# This is the version number of the application being deployed. This version number should be
# incremented each time you make changes to the application. Versions are not expected to
# follow Semantic Versioning. They should reflect the version the application is using.
# It is recommended to use it with quotes.
appVersion: "3.2.1"


icon: "https://www.google.com/images/branding/googlelogo/2x/googlelogo_color_272x92dp.png" 

Im not sure if prometheus metrics were already introduced in that version, but you could try to deploy the latest

[jannotti-glaucio]

I updated it to version 4.0.4 and it still does not working.

This is my values.yaml file content:

dkron:
  image:
    tag: 4.0.4

  server:
    replicaCount: 1
    autoscaling:
      enabled: false
    persistence:
      size: 1Gi

  agent:
    replicaCount: 1
    autoscaling:
      enabled: false    

  ingress:
    certificate: arn:aws:acm:sa-east-1:016052961033:certificate/77c845fc-c9cd-49a2-b74d-90ed17cf85e8
    hostname: dkron.dev.confia.net.br

  envs:
  - name: DKRON_ENABLE_PROMETHEUS
    value: true

[jannotti-glaucio]

Can help me @vcastellm ?