sampleseqproject 1.0.3

Azure monitor service

• Azure monitor helps us to understand how our applications are performing and proactively indentifies issues affecting them and the resources they depend on.
• Azure monitor allows us to create alerts on different resources using metrics provided for each resource.

Metrics :

The following are the metrics which are useful for monitoring for different resources in azure -

Metrics we can monitor for Service Bus Queue :

• Count of active messages in Queue/Topic
• Count of dead-lettered messages in Queue/Topic
• Count of messages in Queue/Topic
• Size
• Incoming requests

Metrics we can monitor for Webapp :

• CPU time
• Requests
• Average memory working set
• Average response time
• HTTP 401
• HTTP server errors
• Connections

Metrics we can monitor for PostgreSQL :

• CPU percentage
• Memory percentage
• Storage percentage
• Storage limit
• Active connections
• Failed connections

Metrics we can monitor for Storage Account :

• Used capacity

How to setup alerts for metrics in azure monitor:

1. Go to Azure portal, click on Monitor

2. Click Alerts then click + New alert rule

3. Click Select target, select a target resource that you want to alert on. Use Subscription and Resource type drop-downs to find the resource you want to monitor.

4. click on Add condition. we will be able to see all the available metrics for monitoring for particular resource type. Select a metric you want to monitor on

5. Define the alert parameters Aggregation Type, Frequency, Operator and Threshold

6. Add an action group to the alert either by selecting an existing action group or creating a new action group.

7. Fill Alert details Alert rule name, Description, Severity

Here is an example of how we can scrape Azure Service Bus queue

azureMetadata:
tenantId: xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx
subscriptionId: xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx
metricDefaults:
aggregation:
  interval: 00:05:00
scraping:
  schedule: "0 * * ? * *"
metrics:
- name: Queue_size_test_queue
  description: "Amount of active messages in the queue"
  resourceType: ServiceBusQueue
  resourceGroupName: Helm_test_woq
  namespace: Helmtest
  queueName: test_queue
  azureMetricConfiguration:
    metricName: ActiveMessages
    aggregation:
      type: Average

Generic Azure Resource allows us to scrape every Azure service supported by Azure Monitor

azureMetadata:
  tenantId: xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx
  subscriptionId: xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx
metricDefaults:
  aggregation:
    interval: 00:05:00
  scraping:
    schedule: "0 * * ? * *"
metrics:
  - name: webapp_preprod_cpu_time
    description: "CPU time for webapp preprod"
    resourceType: Generic
    resourceGroupName: kmd-logic-api-preprod-rg
    resourceUri:  /Microsoft.Web/sites/kmd-logic-api-preprod-webapp
    azureMetricConfiguration:
      metricName: cpu_percent
      aggregation:
        type: Average

• Resource Uri is available from resource explorer

• metricName is available from debugger console

• name : Name of the metric that will be exposed in the scrape endpoint for Prometheus
• description : Description of the metric that will be exposed in the scrape endpoint for Prometheus
• resourceType : Type of resource
• resourceGroupName : The resource group to scrape for the metric