Microsoft AZ-700: Monitor Your Networks Using Azure Monitor

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Notes from MS Learn AZ-700 Module 8: Design and Implement Network Monitoring – Unit 2: Monitor Your Networks Using Azure Monitor

  • What is Azure Monitor
    • Helps to maximize availability/performance of apps and services
    • Delivers comprehensive solution for collecting/analyzing/acting on telemetry from cloud and on-prem
    • Info helps understand how apps are performing and identify issues affecting them and depended upon resources
    • Sample list of features
      • Use App Insights to detect/diagnose issues across apps
      • Correlate infra issues with VM and Container insights
      • Use log analytics for troubleshooting/diagnostics of monitoring data
      • Support ops at scale with smart alerts/automated actions
      • Create visual dashboards and workbooks in Azure
      • Collect data from monitored resources using. Azure Monitor Metrics
    • Diagram below offers high-level overview of Azure Monitor
    • Two fundamental types of data
      • Metrics
      • Logs
    • Left Panel is monitoring source to populate data stores
    • Right Panel is actions that can be performed on said data
      • Analysis
      • Alerting
      • Stream to ext sources
    • (Image taken from MS Learn)
  • Monitor data types in Azure Monitor
    • Two types of data collected
      • Metrics
        • Azure Monitor Metrics is feature collecting numeric data from monitored resources into time series DB
        • Metrics are numerical and collected at regular intervals
        • Describe aspects of system at a particular time
        • Lightweight/Capable of supporting near real-time – useful for alerting
      • Logs
        • Contain diff kinds of data organized into records with diff properties for each type
        • Telemetry(events and traces) stored as logs in addition for perf data for analysis
  • Azure Monitor metric sources
    • 4 key sources of collected
      • Azure resources
        • Create platform metrics giving visibility into resource health/perf
        • Each resource type creates distinct metrics
        • Platform metrics collected from Azure resource at 1min unless defined differently
      • Applications
        • App insights show metrics for monitored apps to aid in perf issue and trend detection
        • Includes server response time and browser exceptions
      • VM Agents
        • Collected from guest OS
        • Enable guest OS for Windows VM with Windows Diagnostic Extension (WAD)
        • Linux VMs with InfluxData Telegraf Agent
      • Custom
        • Defined metrics in app monitored with App Insights
        • Also custom metrics for Azure service using custom API
  • Azure Monitor Metric tasks
    • Table summarized tasks possible for using metrics
    • (Table below from MS Learn)
  • Metrics Explorer
    • Data collected is shown in the Monitoring tab of a resource Overview Page
    • Example for a VM
      • CPU
      • Network
      • Disk
  • Monitor network resources with Azure Monitor Network Insights
    • Use Insights > Networks section of Azure Monitor for high-level network resource health and metrics
    • Provides access to network monitoring features
      • Connection Monitor
      • Flow Logging for NSG
      • Traffic Analytics
    • Key components
      • Network Health/Metrics
        • Offers simple method of visualizing inventory of net resources along with resource health and alerts
        • Health divided into 4 areas
          • Search & filtering
          • Resource health & metrics
          • Alerts
          • Dependency view
      • Connectivity
        • Providing visualization of Connection Monitor tests
        • Test grouped by SRC/DST
      • Traffic
        • Providing access to NSG flow logs & Traffic analytics for selected subscriptions
        • Grouped by location
        • Searchable by any IP addr in environment
      • Diagnostic Toolkit
        • Providing access to all diag feature available for shoot of network/components
        • Most user Network Watcher
          • Capture packets for anomaly diagnoses
          • Troubleshoot VPN
            • Diagnose Virtual Network Gateway/Connection health
          • Troubleshoot connectivity
            • Check TCP connections
            • Includes FQDN, URI, or IPv4 Addr
          • Identify Next Hops
            • Obtain next hop type/IP of packet from VM and NIC
            • Knowing can help establish traffic direction to expected DST or drops
          • Diagnose traffic filtering issues
            • Verify packet is allowed/denied to/from VM
            • Security group decision and name of rule denying traffic returned
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