Task 09: Log Analytics Workspace
DOCUMENT CATEGORY: Runbook SCOPE: Log Analytics Workspace deployment PURPOSE: Establish centralized monitoring and logging MASTER REFERENCE: Microsoft Learn - Log Analytics
Status: Active
Overview
This task creates a Log Analytics workspace that serves as the centralized log destination for all management infrastructure — VMs, networking resources, Key Vault, and eventually the Azure Local cluster itself. Diagnostic settings for other resources will reference this workspace.
Task Classification
Execution Target: Azure-Only (control-plane API operation) Tab Profile: 3 tabs — Azure Portal · Azure CLI / PowerShell · Standalone Script
Terraform Reference
Module: azurelocal-toolkit
File: log.tf
Mode: Management
Components Created
| Resource | Name Pattern | Purpose |
|---|---|---|
| Log Analytics Workspace | log-azrlmgmt-{env}-{region}-01 | Centralized log collection |
Workspace Configuration
| Setting | Value | Source |
|---|---|---|
| Name | log-azrlmgmt-{env}-{region}-01 | azure_infrastructure.log_analytics.management.name |
| SKU | PerGB2018 | azure_infrastructure.log_analytics.management.sku |
| Retention | 90 days | azure_infrastructure.log_analytics.management.retention_days |
Prerequisites
- Resource group exists
- Log Analytics contributor role on target resource group
Variables from variables.yml
| Variable | Config Path | Example (IIC) |
|---|---|---|
| Subscription ID | azure.subscriptions.<name>.id | (per environment) |
| Resource Group | azure_infrastructure.log_analytics.management.resource_group | rg-azrlmgmt-azl-eus-01 |
| Workspace Name | azure_infrastructure.log_analytics.management.name | log-azrlmgmt-azl-eus-01 |
| SKU | azure_infrastructure.log_analytics.management.sku | PerGB2018 |
| Retention (days) | azure_infrastructure.log_analytics.management.retention_days | 90 |
Single Subscription Model
Landing Zone Placement
| Field | Value | Config Path |
|---|---|---|
| Subscription | Customer subscription | azure.subscriptions.<name>.id |
| Resource Group | rg-azrlmgmt-{env}-{region}-01 | azure_infrastructure.log_analytics.management.resource_group |
| Workspace Name | log-azrlmgmt-{env}-{region}-01 | azure_infrastructure.log_analytics.management.name |
Execution Options
- Azure Portal
- Azure CLI / PowerShell
- Standalone Script
Azure Portal
When to use: Learning Azure Local, single deployment, prefer visual interface
Procedure
- Create Log Analytics Workspace:
- Search for Log Analytics workspaces → + Create
| Field | Value | Source |
|-------|-------|--------|
| Name |
log-azrlmgmt-{env}-{region}-01|azure_infrastructure.log_analytics.management.name| | Subscription | Target subscription |azure.subscriptions.<name>.id| | Resource Group | Management RG |azure_infrastructure.log_analytics.management.resource_group| | Region | Your region |azure.region|
- Configure Pricing Tier (optional):
- Go to Usage and estimated costs → Select Pay-As-You-Go (Per GB 2018)
- Configure Retention:
- Go to Usage and estimated costs → Data Retention → Set to value from config
| Field | Value | Source |
|-------|-------|--------|
| Retention | 90 days |
azure_infrastructure.log_analytics.management.retention_days|
- Review + create: Verify → Click Create
Validation
- Workspace provisioning state: Succeeded
- SKU is PerGB2018
- Retention set to configured value
- Workspace ID can be retrieved
Links
Azure CLI / PowerShell
When to use: Scripted Azure operations from management workstation or pipeline — config-driven via
variables.yml
Script
Primary: scripts/deploy/02-azure-foundation/phase-04-azure-management-infrastructure/task-09-log-analytics/powershell/New-LogAnalyticsWorkspace.ps1
Alternatives:
| Variant | Path |
|---|---|
| PowerShell + Azure CLI | task-09-log-analytics/azure-cli/New-LogAnalyticsWorkspace.azcli.ps1 |
| Bash + Azure CLI | task-09-log-analytics/bash/invoke-log-analytics.sh |
Code
# ============================================================================
# Script: New-LogAnalyticsWorkspace.ps1
# Execution: Run from management workstation — reads variables.yml
# Prerequisites: Az.OperationalInsights module, authenticated to Azure
# ============================================================================
#Requires -Modules Az.OperationalInsights, Az.Resources
param(
[Parameter(Mandatory = $false)]
[ValidateScript({Test-Path $_})]
[string]$ConfigPath = "config/variables.yml"
)
$ErrorActionPreference = "Stop"
$scriptRoot = $PSScriptRoot
. "$scriptRoot/../../../../../common/utilities/helpers/config-loader.ps1"
. "$scriptRoot/../../../../../common/utilities/helpers/logging.ps1"
$config = Get-InfrastructureConfig -ConfigPath $ConfigPath
$SubscriptionId = $config.azure.subscriptions.($config.azure_infrastructure.log_analytics.management.subscription).id
$ResourceGroup = $config.azure_infrastructure.log_analytics.management.resource_group
$WorkspaceName = $config.azure_infrastructure.log_analytics.management.name
$Location = $config.network.azure_vnets.management.location
$RetentionDays = $config.azure_infrastructure.log_analytics.management.retention_days
$Sku = $config.azure_infrastructure.log_analytics.management.sku
Set-AzContext -SubscriptionId $SubscriptionId | Out-Null
Write-LogInfo "Creating Log Analytics workspace: $WorkspaceName"
$workspace = New-AzOperationalInsightsWorkspace `
-ResourceGroupName $ResourceGroup `
-Name $WorkspaceName `
-Location $Location `
-Sku $Sku `
-RetentionInDays $RetentionDays
Write-LogSuccess "Log Analytics workspace created: $($workspace.Name)"
Write-LogInfo "Workspace ID: $($workspace.CustomerId)"
$workspace
Validation
Get-AzOperationalInsightsWorkspace -ResourceGroupName $ResourceGroup -Name $WorkspaceName | Format-List Name, Sku, RetentionInDays, ProvisioningState, CustomerId
Validation Script: scripts/validation/02-azure-foundation/phase-04/Test-LogAnalytics.ps1
Standalone Script
When to use: Copy-paste ready script — no config file, no helpers needed.
Code
# ============================================================================
# Script: New-LogAnalyticsWorkspace-Standalone.ps1
# Execution: Run anywhere — fully self-contained
# Prerequisites: Az.OperationalInsights module, authenticated to Azure
# ============================================================================
#Requires -Modules Az.OperationalInsights, Az.Resources
#region CONFIGURATION
$SubscriptionId = "00000000-0000-0000-0000-000000000000"
$ResourceGroup = "rg-azrlmgmt-azl-eus-01"
$WorkspaceName = "log-azrlmgmt-azl-eus-01"
$Location = "eastus"
$RetentionDays = 90
$Sku = "PerGB2018"
#endregion CONFIGURATION
Set-AzContext -SubscriptionId $SubscriptionId | Out-Null
Write-Host "Creating Log Analytics workspace: $WorkspaceName" -ForegroundColor Cyan
$workspace = New-AzOperationalInsightsWorkspace -ResourceGroupName $ResourceGroup `
-Name $WorkspaceName -Location $Location -Sku $Sku -RetentionInDays $RetentionDays
Write-Host "Workspace '$WorkspaceName' created — ID: $($workspace.CustomerId)" -ForegroundColor Green
No External Dependencies
Self-contained. Edit the #region CONFIGURATION block and run.
Validation
- Workspace provisioned
- SKU: PerGB2018
- Retention: 90 days (or configured value)
- Workspace ID retrievable
CAF/WAF Landing Zone Model
In the CAF/WAF model, the Log Analytics workspace is deployed in the Management subscription for centralized observability.
Landing Zone Placement
| Field | Value | Config Path |
|---|---|---|
| Subscription | Management subscription | azure.subscriptions.management.id |
| Resource Group | rg-azrlmgmt-{env}-{region}-01 | azure_infrastructure.log_analytics.management.resource_group |
| Workspace Name | log-azrlmgmt-{env}-{region}-01 | azure_infrastructure.log_analytics.management.name |
Execution Options
- Azure Portal
- Azure CLI / PowerShell
- Standalone Script
Azure Portal
Follow the same procedure as Single Subscription → Azure Portal, targeting the Management subscription.
Validation
- Workspace in Management subscription
- Cross-subscription diagnostic settings can target this workspace
Azure CLI / PowerShell
Same Script — Different Config
The orchestrated script is identical. variables.yml references the correct Management subscription for CAF/WAF.
Standalone Script
Update #region CONFIGURATION for Management subscription:
#region CONFIGURATION
$SubscriptionId = "00000000-0000-0000-0000-000000000000" # Management subscription
$ResourceGroup = "rg-azrlmgmt-azl-eus-01"
# ...
#endregion CONFIGURATION
Validation
- Workspace in Management subscription
- Diagnostic settings from other subscriptions can send logs here
Troubleshooting
| Issue | Root Cause | Remediation |
|---|---|---|
| Workspace name already taken | Names are globally unique | Choose a different name or check for soft-deleted workspace |
| Data not appearing | Diagnostic settings not configured | Configure diagnostic settings on source resources |
| Retention change not applied | UI caching | Refresh portal; verify via CLI |
| Cost unexpectedly high | High data ingestion volume | Review data collection rules and reduce unnecessary tables |
Navigation
| Previous | Up | Next |
|---|---|---|
| Task 08: Arc Gateway | Manual Deployment Index | Task 10: Key Vault |
Version Control
- Created: 2025-09-15 by Hybrid Cloud Solutions
- Last Updated: 2026-03-03 by Hybrid Cloud Solutions
- Version: 4.0.0
- Tags: azure-local, log-analytics, monitoring, observability
- Keywords: Log Analytics, Azure Monitor, workspace, logging, diagnostics, retention
- Author: Hybrid Cloud Solutions