python-appservice-deploy
PopularDeploy Python (Flask/Django/FastAPI) code to Azure App Service Linux. WHEN: \"Flask App Service\", \"Django App Service\", \"FastAPI App Service\", \"deploy Python to App Service\". DO NOT USE FOR: Container Apps, Functions, non-Python, Terraform/Bicep/IaC, full infra — use azure-prepare.
"Deploy Python (Flask/Django/FastAPI) code to Azure App Service Linux. WHEN: \"Flask App Service\", \"Django App Service\", \"FastAPI App Service\", \"deploy Python to App Service\". DO NOT USE FOR: Container Apps, Functions, non-Python, Terraform/Bicep/IaC, full infra — use azure-prepare."
Python on Azure App Service — Code Deploy
Deploys Python (Flask, Django, FastAPI, generic) code to Azure App Service Linux (P0v3, Python 3.14). Creates RG + Plan + Web App if missing. Hand off to azure-prepare for VNet, Key Vault, databases, or IaC.
MCP tools used: mcp_azure_mcp_subscription_list, mcp_azure_mcp_group_list, mcp_azure_mcp_appservice, mcp_azure_mcp_azd (when azure.yaml is present).
Workflow
- Resolve context — smart defaults, minimal prompts. Only the app name is interactive; RG (
<app>-rg), Plan (<app>-plan), region (currentazdefault oreastus2), subscription are derived. create-app.md §1. - Detect framework (advisory, never blocks). detect.md.
- Choose path —
azure.yamlhost: appservice → deploy-azd.md; else deploy-azcli.md. - Ensure RG → Plan (
P0v3 --is-linux) → Web App (--runtime "PYTHON:3.14") exist. On transient ARM errors, follow transient-retry.md. create-app.md. - Set startup — Flask/Django: none (Oryx auto-detects). FastAPI: always
python -m uvicorn main:app --host 0.0.0.0. Other: warn. startup-commands.md. - Set
SCM_DO_BUILD_DURING_DEPLOYMENT=true. - Deploy —
azd deployoraz webapp deploy --type zip --track-status false. - STOP. Print the post-deploy message (post-deploy-message.md) and end the turn.
Hard rules
- ⛔ NO POST-DEPLOY VERIFICATION — after deploy returns, do not run
az webapp log tail,curl,Invoke-WebRequest, or any health probe. App Service needs 2–3 min to warm; a quiet log or early 5xx is not failure. - ⛔ SHELL SAFETY — for
--runtimealways use"PYTHON:3.14"(colon). Never"PYTHON|3.14"(pipe is a shell operator). - ⛔ NEVER
az webapp up— deprecated. Use Step 7 commands. - ✅ URL FORMAT — present endpoints as
https://...URLs.
Error Handling
See errors.md for the full symptom → cause → fix matrix. Quick triage: missing plan/app → re-run Step 4; container ping timeout on 8000 → fix startup (Step 5); ModuleNotFoundError after deploy → ensure Step 6 ran, redeploy.
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