NameTitleMicrosoft

Windows Azure: Migrating Web Applications

Agenda • Application Migration

• Connecting IaaS and PaaS

Application Migration

Migration Approaches

Build Virtual Machine in the Cloud• Lowers upload time and dependency risk• Requires upload and installation of application and data

Migrating an Existing Virtual Machine• Application, Configuration and Data in an installed Working State • Requires uploading a large amount of data and a higher risk of drivers or other

hardware dependencies on VM not available in the cloud

Migrating a Multi-VM Application

Cloud Service Acts as a Networking Boundary• All VMs in the same service can communicate directly• Name resolution between VMs is automatic with Windows Azure provided DNS

Cloud ServiceName: myapp1.cloudapp.net

Virtual MachineVM Name: iisvm110.1.5.6

Virtual MachineVM Name: iisvm210.1.5.7

DIP

Virtual MachineVM Name: sqlvm110.1.5.8

DIP DIP

Load BalancerPublic IP

Virtual Machine Migration

Windows Azure Supports VHD File Format• Other formats will have to be converted or migrated before upload

Upload Existing VHDs using PS (Add-AzureVHD)• Supports Resuming Failed Transfers • Converting from Dynamic to Fixed Disk on Upload• Efficient Upload – does not send empty bytes

Things to Do Before Uploading OS Disk• Enable Remote Access

Migrating a Simple Virtual Machine

On-Premises Virtual MachineMachine Name: APPSRV1Memory: 8 GB Cores: 4Ports: 80/443 for http/https

Guest: C:\Host: C:\VMs\APP-OS.vhd

Guest: D:\Host: D:\VMs\APP-Data.vhd

Guest: E:\Host: E:\VMs\APP-Logs.vhd

Cloud ServiceName: myapp1.cloudapp.net

Virtual MachineRole Name: appsrv14 Cores 7 GB Ram Windows

AzureStorageGuest: C:\

WAStorage\VMs\APP-OS.vhd

Guest: E:\WAStorage\VMs\APP-Data.vhdGuest: F:\WAStorageVMs\APP-Logs.vhd

DeploymentSlot Production

Migration Steps1) Upload VHDs Azure PS or other Tools Add-AzureVHD2) Create VM Configuration with data disks attached Data Disk 1 = APP-Data.vhd Data Disk 2 = App-Logs.vhd New-AzureVMConfig3) Create VM New-AzureVM4) Adjust App for Drive Letters

5) Add Endpoint(s) 80, TCP, http 443, TCP, https

TCP Endpoints 80 and 443

Connecting IaaS and PaaS

PaaS SaaSPhysical Virtual IaaS

IaaS and PaaS – Better Together

The Benefits of PaaS

PaaS is cheaperReason: There’s less admin and management work to doBenefit: Organizations spend less supporting applications

PaaS is fasterReason: There’s less work for developers to doBenefit: Applications can go from idea to availability more quickly

PaaS is lower riskReason: The platform does more, leaving fewer opportunities for errorBenefit: Creating and running applications gets more reliable

IaaS and PaaS Side by Side

Direct Connectivity Using Virtual NetworkingFor advanced connectivity scenarios such as Active Directory or DCOM

Connect Cloud Apps via VIPsEasily compose services by connecting public endpoints

Windows Azure Virtual NetworkPersistent IP Address Requirements• Virtual Machines deployed into a virtual network have an

infinite DHCP lease

Hybrid On-Premises Cloud Apps• Requirement for connectivity between your data center and

the public cloud

Connectivity between cloud services• Deploying Active Directory in the Cloud or connecting a

PaaS to IaaS Service

Subnet 2

Subnet 1

Connecting Applications and VMsStrengths• Simplicity• Tenant Autonomy• VIP Swap (cloud services)• Easy Local Dev/Test

SQL Data Access Traffic

Through Public

Endpoint

Weaknesses• Higher Latency• Less Secure

Management/Deployment Overhead

Cloud Service or Web Site

Cloud Service

SQL Server

Load Balancer

80

2001-1433

Secure Endpoints with Windows Server Firewall

Load Balancer

Connecting Cloud Services with VNETStrengths• Protect VMs from the open Internet• Lower Latency• VIP Swap (web / worker roles)• Advanced Connectivity Requirements

Weaknesses• VNET Complexity• Windows Azure Provided DNS

does not span cloud services

Direct Access

via VNET

AppSubnet (10.0.0.0/16)

SQLSubnet (10.1.0.0/16)

Load Balancer

80

Web or Worker

Cloud Service1

Cloud Service 2

AD

SQL Mirror

AD Subnet(10.2.0.0/16)

ContosoVNet (10.0.0.0/8)

DEMO

Connecting Cloud Services

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