🛡️ Part 7 — Security & Governance
Where Architecture Becomes Control
Up to now, you have:
- MG structure ✔
- Subscription model ✔
- Network design ✔
- Identity model ✔
But none of this matters if:
People can bypass it
🔥 First Principle
In cloud, governance is not a document — it is enforced through policy
❌ The Most Common Mistake
Teams do:
- define standards in PPT
- write governance documents
- share guidelines
But never enforce them.
👉 Result:
Everyone builds differently anyway
🧠 What Governance Actually Means
Governance is:
- what is allowed
- what is denied
- what is monitored
- what is enforced automatically
🔷 Core Governance Components
1. Azure Policy (Most Critical)
This is your enforcement engine
What it does
- Deny non-compliant deployments
- Enforce configurations
- Audit resources
- Auto-remediate
Real Examples
- ❌ Deny public IP creation
- ❌ Deny deployment outside approved regions
- ✔ Enforce tagging
- ✔ Require encryption
- ✔ Enable diagnostic logs
🔥 Policy Types
| Type | Purpose |
|---|---|
| Deny | Block non-compliant resources |
| Audit | Detect issues |
| DeployIfNotExists | Auto-fix |
| Modify | Enforce configuration |
Real Example (PCI MG)
At PCI MG:
- Deny public IP
- Require private endpoints
- Enforce Defender
- Require logging
👉 All workloads inherit automatically
2. Policy Initiatives (Policy Sets)
Group policies into logical bundles
For Example:
“PCI Baseline Initiative”
- No public IP
- Encryption required
- Logging mandatory
- Approved regions
👉 Applied once → enforces everything
3. Microsoft Defender for Cloud
Security posture + threat protection
What it does
- vulnerability assessment
- security recommendations
- threat detection
- compliance scoring
Real Example
- detects exposed ports
- flags missing patches
- alerts suspicious activity
4. Microsoft Sentinel (SIEM/SOAR)
Central security monitoring
What it does
- collects logs
- correlates events
- detects threats
- automates response
Real Example
- detects brute-force attempts
- flags unusual login patterns
- triggers incident workflows
5. Key Vault
Secure secrets management
Stores:
- passwords
- certificates
- API keys
Real Example
- app retrieves secrets securely
- no hardcoded credentials
6. Backup & DR Governance
Tools
- Recovery Services Vault
- Azure Backup
- Site Recovery
Enforced via policy
- backup must be enabled
- retention rules
- geo-redundancy
7. Tagging Governance
Critical for cost + ownership
Example tags
- Application
- Owner
- Environment
- Cost Center
Enforced via:
- policy (mandatory tags)
- automation
⚠️ Common Mistakes
❌ Too many policies too early
👉 blocks teams
❌ Audit-only mode forever
👉 no real enforcement
❌ No exception process
👉 teams bypass governance
❌ Policies without testing
👉 break deployments
🧠 Architect Thinking
You don’t ask:
“What policies should I create?
You ask:
“What behavior must never be allowed in this environment?”
If it’s not enforced, it’s not governance
🔁 How Everything Connects
| Layer | Role |
|---|---|
| Identity | Who can access |
| Network | How traffic flows |
| Policy | What is allowed |
Governance is what turns architecture into a platform
Without it:
- you have cloud
With it:
- you have controlled cloud
What Comes Next
Now we move into:
⚙️ Deployment & Automation (IaC, CI/CD, Platform Engineering)
Because:
If governance defines rules
Automation ensures they are followed consistently
| ⬅ Back to Series Home | ⬅ Back to: Identity Design ➡ | Next: Deployment & Automation ➡ |