Deploy observability resources and set up logs

Article
11/19/2024

Observability provides visibility into every layer of your Azure IoT Operations configuration. It gives you insight into the actual behavior of issues, which increases the effectiveness of site reliability engineering. Azure IoT Operations offers observability through custom curated Grafana dashboards that are hosted in Azure. These dashboards are powered by Azure Monitor managed service for Prometheus and by Container Insights. This guide shows you how to set up Azure Managed Prometheus and Grafana and enable monitoring for your Azure Arc cluster.

Complete the steps in this article before deploying Azure IoT Operations to your cluster.

Prerequisites

An Arc-enabled Kubernetes cluster.
Azure CLI installed on your cluster machine. For instructions, see How to install the Azure CLI.
Helm installed on your cluster machine. For instructions, see Install Helm.
Kubectl installed on your cluster machine. For instructions, see Install Kubernetes tools.

Create resources in Azure

Register providers with the subscription where your cluster is located.

Note

This step only needs to be run once per subscription. To register resource providers, you need permission to do the /register/action operation, which is included in subscription Contributor and Owner roles. For more information, see Azure resource providers and types.
```
az account set -s <SUBSCRIPTION_ID>
az provider register --namespace Microsoft.AlertsManagement
az provider register --namespace Microsoft.Monitor
az provider register --namespace Microsoft.Dashboard
az provider register --namespace Microsoft.Insights
az provider register --namespace Microsoft.OperationalInsights
```
Install Azure CLI extensions for Metrics collection for Azure Arc-enabled clusters and Azure Managed Grafana.
```
az extension add --name k8s-extension
az extension add --name amg
```
Create an Azure Monitor workspace to enable metric collection for your Azure Arc-enabled Kubernetes cluster.
```
az monitor account create --name <WORKSPACE_NAME> --resource-group <RESOURCE_GROUP> --location <LOCATION> --query id -o tsv
```
Save the Azure Monitor workspace ID from the output of this command. You use the ID when you enable metrics collection in the next section.
Create an Azure Managed Grafana instance to visualize your Prometheus metrics.
```
az grafana create --name <GRAFANA_NAME> --resource-group <RESOURCE_GROUP> --query id -o tsv
```
Save the Grafana ID from the output of this command. You use the ID when you enable metrics collection in the next section.
Create a Log Analytics workspace for Container Insights.
```
az monitor log-analytics workspace create -g <RESOURCE_GROUP> -n <LOGS_WORKSPACE_NAME> --query id -o tsv
```
Save the Log Analytics workspace ID from the output of this command. You use the ID when you enable metrics collection in the next section.

Enable metrics collection for the cluster

Update the Azure Arc cluster to collect metrics and send them to the previously created Azure Monitor workspace. You also link this workspace with the Grafana instance.

az k8s-extension create --name azuremonitor-metrics --cluster-name <CLUSTER_NAME> --resource-group <RESOURCE_GROUP> --cluster-type connectedClusters --extension-type Microsoft.AzureMonitor.Containers.Metrics --configuration-settings azure-monitor-workspace-resource-id=<AZURE_MONITOR_WORKSPACE_ID> grafana-resource-id=<GRAFANA_ID>

Enable Container Insights logs for logs collection.

az k8s-extension create --name azuremonitor-containers --cluster-name <CLUSTER_NAME> --resource-group <RESOURCE_GROUP> --cluster-type connectedClusters --extension-type Microsoft.AzureMonitor.Containers --configuration-settings logAnalyticsWorkspaceResourceID=<LOG_ANALYTICS_WORKSPACE_ID>

Once these steps are completed, you have both Azure Monitor and Grafana set up and linked to your cluster for observability and metric collection.

Deploy OpenTelemetry Collector

Define and deploy an OpenTelemetry (OTel) Collector to your Arc-enabled Kubernetes cluster.

Create a file called otel-collector-values.yaml and paste the following code into it to define an OpenTelemetry Collector:

mode: deployment
fullnameOverride: aio-otel-collector
image:
  repository: otel/opentelemetry-collector
  tag: 0.107.0
config:
  processors:
    memory_limiter:
      limit_percentage: 80
      spike_limit_percentage: 10
      check_interval: '60s'
  receivers:
    jaeger: null
    prometheus: null
    zipkin: null
    otlp:
      protocols:
        grpc:
          endpoint: ':4317'
        http:
          endpoint: ':4318'
  exporters:
    prometheus:
      endpoint: ':8889'
      resource_to_telemetry_conversion:
        enabled: true
      add_metric_suffixes: false
  service:
    extensions:
      - health_check
    pipelines:
      metrics:
        receivers:
          - otlp
        exporters:
          - prometheus
      logs: null
      traces: null
    telemetry: null
  extensions:
    memory_ballast:
      size_mib: 0
resources:
  limits:
    cpu: '100m'
    memory: '512Mi'
ports:
  metrics:
    enabled: true
    containerPort: 8889
    servicePort: 8889
    protocol: 'TCP'
  jaeger-compact:
    enabled: false
  jaeger-grpc:
    enabled: false
  jaeger-thrift:
    enabled: false
  zipkin:
    enabled: false

In the otel-collector-values.yaml file, make a note of the following values that you use in the az iot ops create command when you deploy Azure IoT Operations on the cluster:
- fullnameOverride
- grpc.endpoint
- check_interval
Save and close the file.

Deploy the collector by running the following commands:

kubectl get namespace azure-iot-operations || kubectl create namespace azure-iot-operations
helm repo add open-telemetry https://open-telemetry.github.io/opentelemetry-helm-charts

helm repo update
helm upgrade --install aio-observability open-telemetry/opentelemetry-collector -f otel-collector-values.yaml --namespace azure-iot-operations

Configure Prometheus metrics collection

Configure Prometheus metrics collection on your cluster.

Create a file named ama-metrics-prometheus-config.yaml and paste the following configuration:

apiVersion: v1
data:
  prometheus-config: |2-
    scrape_configs:
      - job_name: otel
        scrape_interval: 1m
        static_configs:
          - targets:
            - aio-otel-collector.azure-iot-operations.svc.cluster.local:8889
      - job_name: aio-annotated-pod-metrics
        kubernetes_sd_configs:
          - role: pod
        relabel_configs:
          - action: drop
            regex: true
            source_labels:
              - __meta_kubernetes_pod_container_init
          - action: keep
            regex: true
            source_labels:
              - __meta_kubernetes_pod_annotation_prometheus_io_scrape
          - action: replace
            regex: ([^:]+)(?::\\d+)?;(\\d+)
            replacement: $1:$2
            source_labels:
              - __address__
              - __meta_kubernetes_pod_annotation_prometheus_io_port
            target_label: __address__
          - action: replace
            source_labels:
              - __meta_kubernetes_namespace
            target_label: kubernetes_namespace
          - action: keep
            regex: 'azure-iot-operations'
            source_labels:
              - kubernetes_namespace
        scrape_interval: 1m
kind: ConfigMap
metadata:
  name: ama-metrics-prometheus-config
  namespace: kube-system

Apply the configuration file by running the following command:
```
kubectl apply -f ama-metrics-prometheus-config.yaml
```

Deploy dashboards to Grafana

Azure IoT Operations provides a sample dashboard designed to give you many of the visualizations you need to understand the health and performance of your Azure IoT Operations deployment.

Complete the following steps to install the Azure IoT Operations curated Grafana dashboards.

Clone or download the azure-iot-operations repository to get the sample Grafana Dashboard json file locally: https://github.com/Azure/azure-iot-operations.
Sign in to the Grafana console. You can access the console through the Azure portal or use the az grafana show command to retrieve the URL.
```
az grafana show --name <GRAFANA_NAME> --resource-group <RESOURCE_GROUP> --query url -o tsv
```
In the Grafana application, select the + icon.
Select Import dashboard.
Browse to the sample dashboard directory in your local copy of the Azure IoT Operations repository, azure-iot-operations > samples > grafana-dashboard, then select the aio.sample.json dashboard file.
When the application prompts, select your managed Prometheus data source.
Select Import.

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