배포 슬롯 및 교체

배포 슬롯이란?

배포 슬롯 만들기

# Create a staging deployment slot
az webapp deployment slot create \
  --name MyUniqueWebApp \
  --resource-group MyRG \
  --slot staging

# Deploy code to the staging slot
az webapp deploy \
  --name MyUniqueWebApp \
  --resource-group MyRG \
  --slot staging \
  --src-path app.zip

# The staging slot is live at:
# https://MyUniqueWebApp-staging.azurewebsites.net

Staging 슬롯 준비

# web.config snippet for warm-up (IIS/Windows)
# <system.webServer>
#   <applicationInitialization>
#     <add initializationPage='/health' hostName='MyUniqueWebApp-staging.azurewebsites.net'/>
#   </applicationInitialization>
# </system.webServer>

# Or use a startup probe via the App Service health check
az webapp config set \
  --name MyUniqueWebApp \
  --resource-group MyRG \
  --slot staging \
  --generic-configurations '{"healthCheckPath": "/health"}'

슬롯 교체

# Swap staging into production
az webapp deployment slot swap \
  --name MyUniqueWebApp \
  --resource-group MyRG \
  --slot staging \
  --target-slot production

# Rollback: swap production back to staging
az webapp deployment slot swap \
  --name MyUniqueWebApp \
  --resource-group MyRG \
  --slot production \
  --target-slot staging

슬롯 고정 설정과 비고정 설정

# Mark a setting as sticky (slot-specific) -- it won't swap
az webapp config appsettings set \
  --name MyUniqueWebApp \
  --resource-group MyRG \
  --slot staging \
  --slot-settings DATABASE_URL='postgresql://staging-db/...'

# Set a non-sticky setting (it WILL travel with a swap)
az webapp config appsettings set \
  --name MyUniqueWebApp \
  --resource-group MyRG \
  --slot staging \
  --settings FEATURE_FLAG_NEW_UI=true

Canary 릴리스를 위한 트래픽 분할

# Route 10% of traffic to the staging slot (canary)
az webapp traffic-routing set \
  --name MyUniqueWebApp \
  --resource-group MyRG \
  --distribution staging=10

# View current traffic distribution
az webapp traffic-routing show \
  --name MyUniqueWebApp \
  --resource-group MyRG

# Reset all traffic to production
az webapp traffic-routing clear \
  --name MyUniqueWebApp \
  --resource-group MyRG

Auto Swap

# Enable Auto Swap for the staging slot
az webapp deployment slot auto-swap \
  --name MyUniqueWebApp \
  --resource-group MyRG \
  --slot staging \
  --auto-swap-slot production

# Disable Auto Swap
az webapp deployment slot auto-swap \
  --name MyUniqueWebApp \
  --resource-group MyRG \
  --slot staging \
  --disable

배포 슬롯 모범 사례

CI/CD 파이프라인의 슬롯

# GitHub Actions step: deploy to staging slot
# - name: Deploy to Staging Slot
#   uses: azure/webapps-deploy@v2
#   with:
#     app-name: MyUniqueWebApp
#     slot-name: staging
#     publish-profile: ${{ secrets.AZURE_STAGING_PUBLISH_PROFILE }}
#
# - name: Swap to Production
#   uses: azure/CLI@v1
#   with:
#     inlineScript: |
#       az webapp deployment slot swap \
#         --name MyUniqueWebApp \
#         --resource-group MyRG \
#         --slot staging

교체 상태 모니터링

# Create an alert rule for HTTP 5xx errors post-swap
az monitor metrics alert create \
  --name 'HighErrorRate' \
  --resource-group MyRG \
  --scopes '/subscriptions/.../providers/Microsoft.Web/sites/MyUniqueWebApp' \
  --condition 'avg Http5xx > 10' \
  --window-size 5m \
  --evaluation-frequency 1m \
  --action-group MyActionGroup

슬롯과 여러 앱 비교

빠른 확인

Lesson 요약