🍳 Mise-en-Tag Enforcer for Azure

Overview

The Mise-en-Tag Enforcer for Azure is a simple yet powerful tool that deploys an Azure Policy to enforce essential tags on all resource groups. This ensures proper governance, cost allocation, and resource management across your Azure environment without the complexity of enterprise-grade solutions.

This tool enforces four essential tags on all resource groups:

• Environment (Production, Development, Test, Staging)
• Owner (Team or individual responsible)
• CostCenter (For billing allocation)
• Application (Workload identification)

Features

Benefits

• Improved Cost Allocation: Accurately track and allocate costs by department, team, or project
• Enhanced Governance: Ensure all resource groups follow organizational standards
• Clear Ownership: Identify responsible teams or individuals for each resource group
• Simplified Management: Easily filter and organize resources by environment or application

Prerequisites

System Requirements

• PowerShell: Version 5.1 or later
• Azure PowerShell Module: Latest version installed
• Azure Authentication: User must be logged in with Connect-AzAccount

Required Permissions

• Policy Contributor: Role at the target scope (management group or subscription)

Azure PowerShell Setup

# Install Azure PowerShell module (if not already installed)
Install-Module -Name Az -AllowClobber -Scope CurrentUser

# Login to Azure
Connect-AzAccount

# Verify access
Get-AzContext

Quick Start (PowerShell - Recommended)

1. Download the Script

Download the script directly from GitHub or save it as Deploy-EssentialTagsPolicy.ps1

2. Deploy to Management Group

# Replace 'your-mg-id' with your management group ID
./Deploy-EssentialTagsPolicy.ps1 -Scope ManagementGroup -ScopeId "your-mg-id"

3. Deploy to Subscription

# Replace 'your-subscription-id' with your subscription ID
./Deploy-EssentialTagsPolicy.ps1 -Scope Subscription -ScopeId "your-subscription-id"

4. Test First (Recommended)

# Dry run to see what would happen
./Deploy-EssentialTagsPolicy.ps1 -Scope Subscription -ScopeId "your-subscription-id" -WhatIf

Manual Deployment (Azure Portal)

Step 1: Create Policy Definition

1. Navigate to Azure Policy

   Go to Azure Portal → Search "Policy" → Select "Policy"

2. Create Definition

   Click "Definitions" → "Policy definition" → "+ Policy definition"

3. Fill in Details
   • Definition location: Select your Management Group or Subscription
   • Name: require-essential-tags-resource-groups
   • Display name: Require Essential Tags on Resource Groups
   • Category: Create new → Governance
4. Copy Policy Rule

   Copy the entire content from essential-tags-policy.json and paste into the "Policy rule" text box

   Click "Save"

Step 2: Assign the Policy

1. Create Assignment

   Go to "Assignments" → "+ Assign policy"

2. Assignment Details
   • Scope: Select your Management Group or Subscription
   • Policy definition: Search for "Require Essential Tags on Resource Groups"
   • Assignment name: essential-tags-policy
3. Configure Parameters
   • Effect: Choose "Deny" (or "Audit" for testing)
   • Required Tags: Leave default or customize
4. Review and Create

   Click "Review + create" → "Create"

Usage Examples

Compliant Resource Groups

# Resource group with all required tags
az group create \
  --name "myapp-prod-rg" \
  --location "eastus" \
  --tags Environment=Production Owner=platform-team CostCenter=engineering Application=web-app

Non-Compliant Resource Groups

# Missing tags - will be denied
az group create \
  --name "random-rg" \
  --location "eastus"
# ERROR: Resource group must have all required tags

Customization Options

Custom Tags

You can customize which tags are required by modifying the RequiredTags parameter:

./Deploy-EssentialTagsPolicy.ps1 `
  -Scope Subscription `
  -ScopeId "your-subscription-id" `
  -RequiredTags @("Environment", "Owner", "CostCenter", "Application", "SecurityContact")

Enforcement Levels

Setting Audit Mode

Start with audit mode to see compliance without blocking:

./Deploy-EssentialTagsPolicy.ps1 `
  -Scope Subscription `
  -ScopeId "your-subscription-id" `
  -Effect "Audit"

Custom Assignment Name

You can customize the policy assignment name:

./Deploy-EssentialTagsPolicy.ps1 `
  -Scope Subscription `
  -ScopeId "your-subscription-id" `
  -AssignmentName "my-custom-policy"

Checking Compliance

PowerShell Method

# Check policy compliance
Get-AzPolicyState | Where-Object {$_.PolicyDefinitionName -eq "require-essential-tags-resource-groups"}

Azure Portal Method

1. Go to Azure Policy → Compliance
2. Find your "Essential Tags Policy" assignment
3. View compliant vs non-compliant resources

Troubleshooting

Common Issues

Debugging Commands

# Check your permissions
Get-AzRoleAssignment | Where-Object {$_.SignInName -eq (Get-AzContext).Account.Id}

# Validate policy assignment
Get-AzPolicyAssignment -Name "essential-tags-policy"

# Force policy evaluation (if needed)
Start-AzPolicyComplianceScan

Next Steps

Recommended Follow-up Actions

1. Enable Tag Inheritance

   Apply resource group tags to child resources

2. Set up Cost Allocation

   Use tags in Azure Cost Management

3. Automate Tag Application

   Use Infrastructure as Code (Terraform/ARM)

4. Create Tag Policies for Resources

   Extend beyond resource groups

Expected Outcomes

After deployment, you should see:

• ✅ 100% of new resource groups have required tags
• ✅ Clear cost allocation in Azure Cost Management
• ✅ Easy resource identification and ownership
• ✅ Improved governance and compliance scores

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