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Battle-tested patterns for deploying and operating Azure services in production.
Scope: Inheritable skill. Covers SWA, Container Apps, App Service, security posture, rate limiting, production checklists, and multi-subscription management.
Azure Static Web Apps (SWA)
Deployment Method
Prefer GitHub Actions over SWA CLI. SWA CLI v2.0.8 silently fails deploys (reports success, uploads nothing). Use Azure/static-web-apps-deploy@v1:
-uses:Azure/static-web-apps-deploy@v1with:azure_static_web_apps_api_token:${{secrets.SWA_DEPLOY_TOKEN}}repo_token:${{secrets.GITHUB_TOKEN}}action:uploadapp_location:dist# adjust to your output folderskip_app_build:true# if pre-builtskip_api_build:true# if using linked backend
Critical: If the SWA has a linked backend (Azure Functions via az staticwebapp backends link), do NOT include api_location — it creates embedded functions that override the linked backend.
Get the deploy token: az staticwebapp secrets list --name <name> --query "properties.apiKey" -o tsv
Environment Deployment
SWA defaults to preview environments. Always specify production explicitly in any CLI fallback:
swa deploy --env production
Custom Domain Registration
Custom domains require a two-step process:
Step
Action
Validates
1. CNAME record
Point domain to SWA default hostname
DNS ownership
2. Hostname registration
az staticwebapp hostname set
Azure binding
Common error: Adding CNAME but forgetting hostname registration. Both steps are required.
Container Apps health probes have specific threshold ranges:
Parameter
Min
Max
Recommended
failureThreshold
1
48
3-5 for liveness, 10-30 for startup
periodSeconds
1
240
10 for liveness, 5 for startup
initialDelaySeconds
0
60
0 for liveness (use startup probe instead)
timeoutSeconds
1
240
5
Pattern: Use a startup probe with high failure threshold (30) for slow-starting apps instead of a high initialDelaySeconds on the liveness probe.
Container Apps Deployment
# Update with new image
az containerapp update \
--name myapp \
--resource-group myrg \
--image myregistry.azurecr.io/myapp:v1.2.3
# Scale configuration
az containerapp update \
--name myapp \
--resource-group myrg \
--min-replicas 1 \
--max-replicas 10
Azure App Service
11-Step Deployment Pipeline
Typical App Service deployment takes ~7 minutes:
Step
Duration
Action
1
5s
Authenticate to Azure
2
10s
Validate resource group exists
3
30s
Build application
4
15s
Run tests
5
20s
Package artifacts
6
10s
Upload to staging slot
7
60s
Warm up staging slot
8
5s
Run smoke tests on staging
9
30s
Swap staging → production
10
10s
Validate production health
11
5s
Tag release in source control
Rule: Always use staging slots for zero-downtime deployment. Direct-to-production deployments cause cold-start downtime.
Production Readiness Checklist
Category
Requirement
Why
Compute
P1v3 or higher
Burstable tiers have CPU throttling
Networking
VNet integration
Isolate from public internet
Data
Private endpoints for storage/DB
No public connection strings
Identity
Managed identity (no connection strings)
Eliminates secret rotation
Monitoring
Application Insights enabled
Observability
Scaling
Auto-scale rules configured
Handle load spikes
Backup
Automated backup policy
Disaster recovery
SSL
Custom domain + managed certificate
Trust and security
Security Posture Assessment
Pass/Fail Matrix
Use a matrix to track security controls across all resources:
Control
App Service
SQL DB
Storage
Key Vault
Managed Identity
✅
✅
✅
✅
Private Endpoint
✅
✅
❌
✅
Diagnostic Logs
✅
❌
✅
✅
RBAC (no keys)
✅
✅
❌
✅
Encryption at Rest
✅
✅
✅
✅
Rule: Any ❌ in the matrix is a tracked remediation item with a priority (P0-P3) and SLA.
Rate Limiting
Spread vs. Burst
For API calls and deployment operations:
Strategy
Pattern
Use When
Spread
10 calls/sec evenly spaced
Sustained throughput
Burst
100 calls then wait
Quick batch operations
Rule: Prefer spread over burst for production workloads. Azure APIs throttle based on request rate, and burst patterns hit throttle limits earlier than spread patterns with the same total throughput.
Before any infrastructure changes, document what exists:
# List all resources in subscription
az resource list --subscription "My Subscription" \
--output table \
--query "[].{Name:name, Type:type, RG:resourceGroup, Location:location}"# Export to JSON for diff tracking
az resource list --subscription "My Subscription" -o json > inventory.json
Subscription Documentation Template
Each subscription should have a living document with:
Section
Content
Purpose
What this subscription is for
Owner
Team/person responsible
Budget
Monthly spend limit and alerts
Resources
Link to inventory command output
Access
RBAC assignments and justification
Networking
VNet topology, peering, DNS zones
Known Gotchas
Mail.Send on Corporate Tenants
Microsoft 365 corporate tenants often blockMail.Send permission for third-party apps. If your app needs to send email:
Check tenant admin consent policies first
Consider SendMail via Graph with delegated (not application) permissions
Have a fallback (SMTP, SendGrid) for blocked tenants
Document the limitation clearly for users
Azure CLI Context
# Always verify which subscription is active
az account show --query "{Name:name, Id:id}" -o table
# Set explicitly before operations
az account set --subscription "Target Subscription"
Rule: Never assume the correct subscription is active. Always verify or set explicitly in scripts.
Infrastructure as Code
Bicep Best Practices for Deployment
Practice
Why
Use modules for reusable components
DRY principle
Parameters file per environment
Environment isolation
@secure() decorator for secrets
Prevents logging
existing keyword for references
No accidental recreation
What-if before deploy
Catch unintended changes
# Always preview changes before deploying
az deployment group what-if \
--resource-group myrg \
--template-file main.bicep \
--parameters @parameters.prod.json
