[Migrate] Initialize Azure Migrate and Azure Local Migrate Command Module

src/migrate/HISTORY.rst

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+.. :changelog:
+
+Release History
+===============
+
+1.0.0
++++++++++++++++
+* Initial release.
+
+

src/migrate/README.md

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+# Azure CLI Migration Module
+
+This module provides server discovery and replication capabilities for Azure resources and workloads through Azure CLI commands, with special focus on Azure Local (Azure Stack HCI) migrations.
+
+# Azure CLI MCC Extension #
+The Azure CLI extension for managing [Azure Migrate](https://aka.ms/azure-migrate) resources. 
+
+## Install ##
+You can install the extension by running:
+``` sh
+az extension add --name migrate
+```
+
+## Usage ##
+``` sh
+az migrate --help
+```
+
+## Uninstall ##
+You can see if the extension is installed by running `az --version` or `az extension list`. You can remove the extension by running:
+``` sh
+az extension remove --name migrate
+```
+
+
+## Features
+
+- **Server discovery**: Discover servers from various sources
+- **Replication management**: Initialize and create new replications for supported workloads
+
+## Prerequisites
+
+- Azure CLI 2.0+
+- Valid Azure subscription
+- Appropriate permissions for migration operations
+- For Azure Local: Azure Stack HCI environment with proper networking
+
+## Command Overview
+
+The Azure CLI migrate module provides the following commands:
+
+### Server Discovery
+```bash
+# Get discovered servers
+az migrate get-discovered-server --resource-group myRG --project-name myProject
+# Create server replication
+az migrate server create-replication --resource-group myRG --project-name myProject --target-vm-name myVM --target-resource-group targetRG --target-network targetNet
+
+# Show replication status
+az migrate server show-replication-status --resource-group myRG --project-name myProject --vm-name myVM
+
+# Update replication properties
+az migrate server update-replication --resource-group myRG --project-name myProject --vm-name myVM
+
+# Check cross-platform environment
+az migrate server check-environment
+```
+### Azure Local (Stack HCI) Migration Commands
+```bash
+# Initialize Azure Local replication infrastructure  
+az migrate local init --resource-group myRG --project-name myProject
+
+# Create disk mapping for fine-grained control
+az migrate local create-disk-mapping --disk-id "disk001" --is-os-disk --size-gb 64 --format-type VHDX
+
+# Create NIC mapping for network configuration
+az migrate local create-nic-mapping --nic-id "nic001" \
+  --target-virtual-switch-id "/subscriptions/xxx/resourceGroups/xxx/providers/Microsoft.AzureStackHCI/logicalnetworks/network001"
+
+# Create basic replication
+az migrate local create-replication --resource-group myRG --project-name myProject \
+  --server-index 0 --target-vm-name migratedVM \
+  --target-storage-path-id "/subscriptions/xxx/providers/Microsoft.AzureStackHCI/storageContainers/container001" \
+  --target-virtual-switch-id "/subscriptions/xxx/providers/Microsoft.AzureStackHCI/logicalnetworks/network001" \
+  --target-resource-group-id "/subscriptions/xxx/resourceGroups/targetRG"
+
+# Create replication with custom disk and NIC mappings
+az migrate local create-replication-with-mappings --resource-group myRG --project-name myProject \
+  --discovered-machine-id "/subscriptions/xxx/machines/machine001" \
+  --target-vm-name migratedVM \
+  --target-storage-path-id "/subscriptions/xxx/providers/Microsoft.AzureStackHCI/storageContainers/container001" \
+  --target-resource-group-id "/subscriptions/xxx/resourceGroups/targetRG" \
+  --disk-mappings '[{"DiskID": "disk001", "IsOSDisk": true, "Size": 64, "Format": "VHDX"}]' \
+  --nic-mappings '[{"NicID": "nic001", "TargetVirtualSwitchId": "/subscriptions/xxx/logicalnetworks/network001"}]'
+
+# Get replication job details
+az migrate local get-job --resource-group myRG --project-name myProject --job-id "job-12345"
+
+# Get Azure Local specific job
+az migrate local get-azure-local-job --resource-group myRG --project-name myProject --job-id "job-12345"
+
+# Start migration (planned failover)
+az migrate local start-migration --target-object-id "/subscriptions/xxx/replicationProtectedItems/item001" \
+  --turn-off-source-server
+
+# Remove replication after successful migration
+az migrate local remove-replication --target-object-id "/subscriptions/xxx/replicationProtectedItems/item001"
+```
+
+### Authentication Management
+```bash
+# Check Azure authentication status
+az migrate auth check
+
+# Login to Azure (interactive)
+az migrate auth login
+
+# Login with device code
+az migrate auth login --device-code
+
+# Login with service principal
+az migrate auth login --app-id "app-id" --secret "secret" --tenant-id "tenant-id"
+
+# Set Azure context
+az migrate auth set-context --subscription-id "00000000-0000-0000-0000-000000000000"
+
+# Show current context
+az migrate auth show-context
+
+# Logout
+az migrate auth logout
+```
+
+### PowerShell Module Management
+```bash
+# Check PowerShell module availability
+az migrate powershell check-module --module-name Az.Migrate
+
+# Update PowerShell modules
+az migrate powershell update-modules --modules Az.Migrate
+```
+
+## Architecture
+
+The migration module consists of several key components:
+
+1. **Cross-Platform PowerShell Integration**: Executes PowerShell cmdlets across Windows, Linux, and macOS
+2. **Azure Local Migration**: Specialized support for Azure Stack HCI migration scenarios
+3. **Authentication Management**: Azure authentication and context management
+4. **Server Discovery and Replication**: Discovery and replication of source machines
+
+## Common Workflows
+
+### Setting up Azure Local Migration
+
+```bash
+# 1. Check prerequisites
+az migrate check-prerequisites
+
+# 2. Set up environment with PowerShell
+az migrate setup-env --install-powershell
+
+# 3. Authenticate to Azure
+az migrate auth login
+
+# 4. Set subscription context
+az migrate auth set-context --subscription-id "your-subscription-id"
+
+# 5. Verify setup
+az migrate verify-setup --resource-group "migration-rg" --project-name "azure-local-migration"
+
+# 6. Initialize Azure Local replication infrastructure
+az migrate local init \
+  --resource-group "migration-rg" \
+  --project-name "azure-local-migration"
+
+# 7. List discovered servers
+az migrate server list-discovered \
+  --resource-group "migration-rg" \
+  --project-name "azure-local-migration" \
+  --source-machine-type VMware
+
+# 8. Create replication for a specific server
+az migrate local create-replication \
+  --resource-group "migration-rg" \
+  --project-name "azure-local-migration" \
+  --server-index 0 \
+  --target-vm-name "WebServer-Migrated" \
+  --target-storage-path-id "/subscriptions/xxx/providers/Microsoft.AzureStackHCI/storageContainers/migration-storage" \
+  --target-virtual-switch-id "/subscriptions/xxx/providers/Microsoft.AzureStackHCI/logicalnetworks/migration-network" \
+  --target-resource-group-id "/subscriptions/xxx/resourceGroups/azure-local-vms"
+
+# 9. Monitor replication progress
+az migrate local get-job --resource-group "migration-rg" --project-name "azure-local-migration" --job-id "job-id"
+
+# 10. Start migration when ready
+az migrate local start-migration --target-object-id "replication-id" --turn-off-source-server
+
+# 11. Monitor migration job
+az migrate local get-azure-local-job --resource-group "migration-rg" --project-name "azure-local-migration" --job-id "job-id"
+```
+
+### Setting up Server Discovery and Replication
+
+```bash
+# 1. Check prerequisites and setup
+az migrate check-prerequisites
+az migrate setup-env --install-powershell
+
+# 2. Authenticate and set context
+az migrate auth login
+az migrate auth set-context --subscription-id "your-subscription-id"
+
+# 3. Verify setup
+az migrate verify-setup --resource-group "migration-rg" --project-name "server-migration-2025"
+
+# 4. List discovered servers
+az migrate server list-discovered --resource-group "migration-rg" --project-name "server-migration-2025" --source-machine-type VMware
+
+# 5. Find specific servers
+az migrate server find-by-name --resource-group "migration-rg" --project-name "server-migration-2025" --display-name "WebServer"
+
+# 6. Create server replication
+az migrate server create-replication --resource-group "migration-rg" --project-name "server-migration-2025" --target-vm-name "WebServer-Azure" --target-resource-group "target-rg" --target-network "target-vnet"
+
+# 7. Monitor replication status
+az migrate server show-replication-status --resource-group "migration-rg" --project-name "server-migration-2025" --vm-name "WebServer-Azure"
+```
+
+## PowerShell Integration
+
+This module provides Azure CLI equivalents to PowerShell Az.Migrate cmdlets:
+
+| PowerShell Cmdlet | Azure CLI Command |
+|-------------------|-------------------|
+| `Initialize-AzMigrateLocalReplicationInfrastructure` | `az migrate local init` |
+| `New-AzMigrateLocalServerReplication` | `az migrate local create-replication` |
+| `New-AzMigrateLocalDiskMappingObject` | `az migrate local create-disk-mapping` |
+| `New-AzMigrateLocalNicMappingObject` | `az migrate local create-nic-mapping` |
+| `Start-AzMigrateLocalServerMigration` | `az migrate local start-migration` |
+| `Remove-AzMigrateLocalServerReplication` | `az migrate local remove-replication` |
+| `Get-AzMigrateLocalJob` | `az migrate local get-azure-local-job` |
+| `Get-AzMigrateDiscoveredServer` | `az migrate server list-discovered` |
+| `New-AzMigrateServerReplication` | `az migrate server create-replication` |
+| `Get-AzMigrateServerReplication` | `az migrate server show-replication-status` |
+
+## Error Handling
+
+The module includes comprehensive error handling for:
+
+- Invalid project configurations
+- Permission and authentication issues
+- Resource not found scenarios
+- Azure service connectivity problems
+- PowerShell execution errors
+- Cross-platform compatibility issues
+
+## Troubleshooting
+
+### Common Issues
+
+**PowerShell Not Found**
+- On Windows: Install PowerShell Core or ensure Windows PowerShell is available
+- On Linux/macOS: Install PowerShell Core from https://github.com/PowerShell/PowerShell
+- Use `az migrate setup-env --install-powershell` for automatic installation guidance
+
+**Authentication Issues**
+- Use `az migrate auth check` to verify authentication status
+- Re-authenticate using `az migrate auth login`
+- Verify subscription context with `az migrate auth show-context`
+
+**Server Discovery Issues**
+- Confirm the appliance is properly configured
+- Verify network connectivity from appliance to Azure
+- Check that discovery is running on the appliance
+- Use `az migrate server list-discovered` to check for discovered servers
+
+**Permission Errors**
+- Ensure Azure Migrate Contributor role is assigned
+- Verify subscription-level permissions for creating resources
+- Check resource group permissions
+
+**Azure Local Specific Issues**
+- Verify Azure Stack HCI cluster is properly registered with Azure
+- Ensure proper networking between source and Azure Local target
+- Check that both source and target appliances are properly configured
+- Verify storage containers and logical networks are properly set up in Azure Local
+- Use `az migrate local init` to initialize infrastructure
+
+**Script Execution Errors**
+- Check PowerShell execution policy
+- Verify PowerShell module availability using `az migrate powershell check-module`
+- Review error messages for specific guidance
+- Use `az migrate check-prerequisites` to verify system requirements
+
+## Contributing
+
+When extending the migration module:
+
+1. Follow Azure CLI command naming conventions
+2. Implement proper error handling and validation
+3. Add comprehensive help documentation
+4. Include usage examples in help text
+5. Update this README with new command examples
+6. Ensure cross-platform PowerShell compatibility
+7. Add appropriate parameter validation
+8. Include integration tests for new commands
+
+For more information on Azure Migrate, visit: https://docs.microsoft.com/azure/migrate/
+
+## License
+
+This project is licensed under the MIT License - see the LICENSE file for details.

src/migrate/azext_migrate/__init__.py

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+# --------------------------------------------------------------------------------------------
+# Copyright (c) Microsoft Corporation. All rights reserved.
+# Licensed under the MIT License.
+# See License.txt in the project root for license information.
+# --------------------------------------------------------------------------------------------
+
+from azure.cli.core import AzCommandsLoader
+from azure.cli.core.profiles import ResourceType
+
+
+class MigrateCommandsLoader(AzCommandsLoader):
+
+    def __init__(self, cli_ctx=None):
+        from azure.cli.core.commands import CliCommandType
+
+        migrate_custom = CliCommandType(
+            operations_tmpl='azure.cli.command_modules.migrate.custom#{}',
+        )
+
+        super().__init__(
+            cli_ctx=cli_ctx,
+            custom_command_type=migrate_custom,
+            resource_type=ResourceType.MGMT_MIGRATE
+        )
+
+    def load_command_table(self, args):
+        from azure.cli.command_modules.migrate.commands \
+            import load_command_table
+        load_command_table(self, args)
+        return self.command_table
+
+    def load_arguments(self, command):
+        from azure.cli.command_modules.migrate._params import load_arguments
+        load_arguments(self, command)
+
+
+COMMAND_LOADER_CLS = MigrateCommandsLoader