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This artical explains how to expose HiveMQ JMX metrics in DataDog using Kubernetes

\uD83D\uDCD8 Pre-requisites

  1. Helm version v3+

  2. Running Kubernetes cluster version 1.18.0 or higher

  3. kubectl lastest version

\uD83D\uDCD8 Instructions

  1. Configure DataDog agent using the Helm chart

    1. Add Datadog helm repository

      1. Code Block
        helm repo add datadog https://helm.datadoghq.com
helm repo update

    2. Create datadog-values.yaml. For full values check here
      Please refer to following the example of datadog-values.yaml

      1. Code Block
        logLevel: DEBUG
targetSystem: "linux"
datadog:
  apiKey: <your api key from your account>
  
  #Logs configurations
  logs:
    enabled: true
    containerCollectAll: true
    containerCollectUsingFiles: true
  
  #Plesse configure this setting based on your region
  site: datadoghq.eu
  
  
  tags: []
  # datadog.kubelet.tlsVerify should be `false` on kind and minikube
  # to establish communication with the kubelet
  kubelet:
    tlsVerify: false
  
  #Following settings are required to collect the Kubernetes events with the Cluster Agent  
  collectEvents: true
  clusterAgent:
    rbac:
      create: true
  

# setting to read JMX metrics from HiveMQ
agents:
  image:
    tagSuffix: "jmx"

    3. install Datadog agent using Helm

      1. Code Block
        kubectl create ns <namespace>
helm install -f datadog-values.yaml <release name> datadog/datadog

    4. Verify installation and check the agent pod’s status

      1. Code Block
        kubectl get pods

      2. Also, check the agent’s log’s to confirm.

  2. Install HiveMQ using Operator

    1. Configure hivemq-values.yaml based on your requirement and then add podAnnotations for Datadog to auto-discover HiveMQ metrics and logs. Check here for details.
      Please find below a minimalist config example of hivemq-values.yaml

      1. Code Block
        hivemq:
  image: hivemq/hivemq4:k8s-4.7.5
  imagePullPolicy: Always
  cpu: 8
  memory: 8Gi
  nodeCount: "3"


  podAnnotations:
    ad.datadoghq.com/hivemq.check_names: '[\"hivemq\"]'
    ad.datadoghq.com/hivemq.init_configs: '[{\"is_jmx\": true, \"collect_default_metrics\": true}]'
    ad.datadoghq.com/hivemq.instances: '[{\"host\": \"%%host%%\",\"port\":\"9010\"}]'
    ad.datadoghq.com/hivemq.logs: '[{\"source\":\"hivemq\",\"service\":\"hivemq-hivemq-1778-mqtt\"}]'
  
  ports:
    - name: "mqtt"
      port: 1883
      expose: true
      patch:
       - '[{"op":"add","path":"/spec/type","value":"LoadBalancer"}]'
    - name: "cc"
      port: 8080
      expose: true
      patch:
        - '[{"op":"add","path":"/spec/sessionAffinity","value":"ClientIP"}]'
    
operator:
  admissionWebhooks:
    # Enable the admission hook
    enabled: false

monitoring:
  enabled: false
  dedicated: false

    2. Install hivemq using the following command

      1. Code Block
        helm upgrade --install -f hivemq-values.yaml <release name> hivemq/hivemq-operator

    3. verify installation

      1. Code Block
        kubectl get pods

    4. Login to your Datadog account and click “Metrics” =>” Explorer” from the left navigation links. You will be redirected to the “Graph your data” page. By default, you will see “system.cpu.user“ metrics and its data.
      Type hivemq in the search box and you should be able to see the list of available metrics.

    5. a

  3. Uninstall DataDog an and HiveMQ

    1. Code Block
      helm list
helm uninstall <datadog release name>
helm uninstall <hivemq release name>
kubectl delete ns <namespce>