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CLI Cheatsheet

Quick reference for the most commonly used commands when developing, deploying, and managing Azure Functions Python apps.

flowchart LR
    A[Initialize project] --> B[Develop locally with func host start]
    B --> C[Test and validate settings]
    C --> D[Deploy with func azure functionapp publish]
    D --> E[Monitor with az functionapp log tail and metrics]

Azure Functions Core Tools (func)

The func CLI is used for local development, testing, and deploying function apps.

Local Development

# Start the local Functions host
func host start

# Start on a custom port
func host start --port 7072

# Start with verbose logging
func host start --verbose

# Create a new function (interactive)
func new

# Create a new function (non-interactive)
func new --name MyFunction --template "HTTP trigger" --authlevel anonymous

Deployment

# Deploy to Azure (recommended for Python)
func azure functionapp publish $APP_NAME --python

# Deploy to a staging slot
func azure functionapp publish $APP_NAME --slot staging --python

# Deploy with remote build (ensures Linux-compatible packages)
func azure functionapp publish $APP_NAME --python --build remote

# Fetch app settings from Azure to local
func azure functionapp fetch-app-settings $APP_NAME

Settings Management

# Add a local setting
func settings add KEY VALUE

# List local settings
func settings list

# Decrypt local settings
func settings decrypt

# Encrypt local settings
func settings encrypt

Azure CLI: Function App (az functionapp)

Create and Manage

# Create a function app on Consumption plan
az functionapp create \
  --name $APP_NAME \
  --resource-group $RG \
  --storage-account $STORAGE_NAME \
  --consumption-plan-location eastus \
  --runtime python \
  --runtime-version 3.11 \
  --functions-version 4 \
  --os-type linux

# Show function app details
az functionapp show \
  --name $APP_NAME \
  --resource-group $RG

# Delete a function app
az functionapp delete \
  --name $APP_NAME \
  --resource-group $RG

# Restart the function app
az functionapp restart \
  --name $APP_NAME \
  --resource-group $RG

# Stop the function app
az functionapp stop \
  --name $APP_NAME \
  --resource-group $RG

# Start the function app
az functionapp start \
  --name $APP_NAME \
  --resource-group $RG

App Settings

# Set app settings
az functionapp config appsettings set \
  --name $APP_NAME \
  --resource-group $RG \
  --settings "KEY1=value1" "KEY2=value2"

# List all app settings
az functionapp config appsettings list \
  --name $APP_NAME \
  --resource-group $RG

# Delete an app setting
az functionapp config appsettings delete \
  --name $APP_NAME \
  --resource-group $RG \
  --setting-names KEY1

Configuration

# Set Flex Consumption maximum instance count
az functionapp scale config set \
  --resource-group $RG \
  --name $APP_NAME \
  --maximum-instance-count <count>

# Configure Flex always-ready instances for HTTP triggers
az functionapp scale config always-ready set \
  --resource-group $RG \
  --name $APP_NAME \
  --settings http=<count>

# Set minimum TLS version
az functionapp config set \
  --name $APP_NAME \
  --resource-group $RG \
  --min-tls-version 1.2

# Enable HTTPS only
az functionapp update \
  --name $APP_NAME \
  --resource-group $RG \
  --set httpsOnly=true

# Show configuration
az functionapp config show \
  --name $APP_NAME \
  --resource-group $RG

Deployment Slots

# Create a staging slot
az functionapp deployment slot create \
  --name $APP_NAME \
  --resource-group $RG \
  --slot staging

# Swap staging to production
az functionapp deployment slot swap \
  --name $APP_NAME \
  --resource-group $RG \
  --slot staging \
  --target-slot production

# List slots
az functionapp deployment slot list \
  --name $APP_NAME \
  --resource-group $RG

# Delete a slot
az functionapp deployment slot delete \
  --name $APP_NAME \
  --resource-group $RG \
  --slot staging

Identity and Keys

# Enable system-assigned Managed Identity
az functionapp identity assign \
  --name $APP_NAME \
  --resource-group $RG

# Show identity
az functionapp identity show \
  --name $APP_NAME \
  --resource-group $RG

# List function keys
az functionapp function keys list \
  --name $APP_NAME \
  --resource-group $RG \
  --function-name health

# List host keys
az functionapp keys list \
  --name $APP_NAME \
  --resource-group $RG

Logs

# Stream live logs
az functionapp log tail \
  --name $APP_NAME \
  --resource-group $RG

# Download logs
az functionapp log download \
  --name $APP_NAME \
  --resource-group $RG \
  --log-file /tmp/func-logs.zip

CORS

# Add allowed origins
az functionapp cors add \
  --name $APP_NAME \
  --resource-group $RG \
  --allowed-origins "https://example.com" "http://localhost:3000"

# Show CORS settings
az functionapp cors show \
  --name $APP_NAME \
  --resource-group $RG

# Remove an origin
az functionapp cors remove \
  --name $APP_NAME \
  --resource-group $RG \
  --allowed-origins "http://localhost:3000"

Azure CLI: Resource Groups (az group)

# Create a resource group
az group create \
  --name $RG \
  --location eastus

# List resource groups
az group list --output table

# Delete a resource group (and ALL resources in it)
az group delete \
  --name $RG \
  --yes --no-wait

Azure CLI: Deployments (az deployment group)

# Deploy Bicep template
az deployment group create \
  --resource-group $RG \
  --template-file infra/main.bicep \
  --parameters appName=$APP_NAME

# Validate a Bicep template (dry run)
az deployment group validate \
  --resource-group $RG \
  --template-file infra/main.bicep \
  --parameters appName=$APP_NAME

# Show deployment status
az deployment group show \
  --resource-group $RG \
  --name main

# List deployments
az deployment group list \
  --resource-group $RG \
  --output table

Azure CLI: Monitoring

# Create a metric alert
az monitor metrics alert create \
  --name "func-errors" \
  --resource-group $RG \
  --scopes "<function-app-resource-id>" \
  --condition "total Http5xx > 10" \
  --window-size 5m

# Query Application Insights logs
az monitor app-insights query \
  --app your-appinsights \
  --analytics-query "requests | take 10"

# List metrics
az monitor metrics list \
  --resource "<function-app-resource-id>" \
  --metric "FunctionExecutionCount"

Quick Reference Table

Task Command
Start locally func host start
Deploy to Azure func azure functionapp publish $APP_NAME --python
Set app setting az functionapp config appsettings set --name $APP_NAME --resource-group $RG --settings "KEY=value"
Stream logs az functionapp log tail --name $APP_NAME --resource-group $RG
Create slot az functionapp deployment slot create --name $APP_NAME --resource-group $RG --slot staging
Swap slot az functionapp deployment slot swap --name $APP_NAME --resource-group $RG --slot staging
Enable identity az functionapp identity assign --name $APP_NAME --resource-group $RG
Deploy Bicep az deployment group create --resource-group $RG --template-file infra/main.bicep

See Also

Sources