http://vic.ms

Advanced Cloud Services Development (PaaS)

Vitor CiaramellaTechnical Evangelist, Microsofthttp://vic.ms

Azure Summit Brazil 2013

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LoadBalanc

er

.csconfig

.csdef

Cloud Services

Users Apps /Browsers

DNS Server

www.myapp.net

www.myapp.com

CNAME

myapp.cloudapp.net50.63.202.28

User environmentInternet environment

Dev. environmentWindows Azure environment

MyApp

Developer

Cloud Service

Production

Staging

myapp

myapp

3f2504e0-4f89-11d3-9a0c-0305e82c3301

Disk

VM ImageHW Specs

MyApp

.csdef

.csconfigDeploy

Disk

.csconfig

MyApp

Disk

.csconfig

MyApp

Disk

.csconfig

MyAppNumber of instances

OS / Disk image

Hardware/VM Size

Disk

.csconfig

MyApp

endpoints

Endpointsdefinitions

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CloudServices

AutomatedStatelessVirtualMachines

=

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Average usage of Cloud Services

New applications Existing web applications

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Advanced Scenarios Windows Services, Console or GUI applications including Tomcat, JBoss, Lucene, Solr, Apache, Hadoop, and etc.

Specific Windows Server / IIS configuration including hosts file, Registry, IIS Media Services, multiple SSL

Certificates, custom IIS AppPool, and etc.

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Challenges Installation, Setup and Configuration

Stateful Memory

Stateful Disk

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Installation, Setup and Configuration

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Install, Setup, Config: possible solutions Use the VM Role Create a local VHD with Windows Server Install, setup and configure your application and server Upload the VHD as a VM Role disk image

Automate the installation, the setup and configuration Create an script/code to automate the installation, the setup and configuration Run it with Startup Tasks Role.OnStart Role.Run

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Automate the installation It depends on the installer technology.

Some applications can be installed simply by copying their files…

For Windows Installer:msiexec.exe /qn /i SQLSysClrTypes.msi /l*v log.txt

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Automate the setup / configuration It depends on the application.

Some applications can configured simply by overwriting their config files…

For the Windows Registry: regedit MyRegistryEntriesToBeImported.reg

For IIS: %windir%\system32\inetsrv\appcmd set config -section:applicationPools-applicationPoolDefaults.processModel.idleTimeout:00:00:00

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Automate the setup / configuration Most Windows Server and IIS configurations can be also changed by using:

PowershellPS IIS:\Sites\DemoSite\DemoApp> set-webconfiguration

"/system.webServer/handlers/add[@path='*.aspx']/@path“-value "*.mspx“

.NET Managed APIs: using (var serverManager = new ServerManager()) { var bindingInfo = "*:443:ssl2.myapp.com"; var certStore = (new X509Store(StoreName.My, StoreLocation.LocalMachine)).Name; var site = serverManager.Sites["MySite"]; if (site != null) { var binding = site.Bindings.Add(bindingInfo, certHash, certStore); binding.SetAttributeValue("sslFlags", 1); serverManager.CommitChanges(); } }

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Running the automated script/code Startup Tasks Simple: Synchronous execution, one-by-one Foreground: Asynchronous execution, keeps the role running Background: Asynchronous execution, does not keep the role running

<Startup> <Task taskType="simple" commandLine="startup\startup.cmd" executionContext="elevated">

<Environment> <Variable name="azurestoragename" value="mystorage" /> </Environment> </Task> </Startup>

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Running the automated script/code Role, RoleEntryPoint OnStart: Role stays busy until completion (doesn’t receive requests), up to 15

minutes Run: Role recycles when exit this method (so, keep it running). Ready to receive

requests. OnStop: Before role stops (clean up), up to 30 seconds

Execution Context: <Runtime executionContext="elevated“ />

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Stateful Memory

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Stateful Memory: possible solutions Rewrite/change your code to not reuse state from subsequent requests

Rewrite/change your code to save the state in a persistent or semi-persistent storage

Use Blob or Table Storage Use SQL Database Use Windows Azure Caching (recommended)

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Stateful Memory with Azure Caching Add the references to the Azure Caching assemblies.

Edit your web.config or app.config file with:

<dataCacheClients>

<dataCacheClient name="default" maxConnectionsToServer="1">

<hosts>

<host name=“myapp.cache.windows.net" cachePort="22233" />

</hosts>

<securityProperties mode="Message">

<messageSecurity authorizationInfo="YWNzOmh0dHBzOi8vdG…">

</messageSecurity>

</securityProperties>

</dataCacheClient>

</dataCacheClients>

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Stateful Memory with Azure Caching To automatically save the ASP.NET session on the Azure Caching, edit your web.config with:<configuration> <system.web> <sessionState mode="Custom" customProvider="DistributedSessionProvider" compressionEnabled="false"> <providers> <add name="DistributedSessionProvider" type="Microsoft.Web.DistributedCache.DistributedCacheSessionStateStoreProvider,Microsoft.Web.DistributedCache" cacheName="default" applicationName=“MyApp" useBlobMode="false"/> </providers> </sessionState> </system.web></configuration>

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Stateful Memory with Azure Caching Access the Azure Caching programmatically, if you need:

var cacheFactory = new DataCacheFactory();var myCache = cacheFactory.GetDefaultCache();var key = "DataAtual";var cachedObject = myCache.Get(key);

if (cachedObject != null){ var value = (DateTime) cachedObject;}else{ var value = DateTime.Now.Date; myCache.Put(key, value, TimeSpan.FromSeconds(15));}

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Stateful Disk

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Stateful Disk: possible solutions Rewrite/change your code to save the state in a persistent storage Use Blob or Table Storage (recommended) Use SQL Database Use Azure Drive

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Stateful Disk with Azure Drive Create a VHD and store it in the Blob Storage.

Mount the VHD as local drive in each instance.

Attention: Only one instance can mount it with Read/Write access.

Disk

Disk

.csconfig

MyApp

Disk

Disk

.csconfig

MyApp

Disk

Disk

.csconfig

MyApp

Disk

Disk

.csconfig

MyApp

Disk.vhd

R/W Mount

R/O

Mou

nt

R/O Mount

R/O Mount

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Stateful Disk with Azure Drive Sample Solr/Lucene scenario

Blob Storage

Disk

Query

Disk

Query

Disk

Query

Disk

Index

Disk.vhd

R/W Mount

R/O

Mou

ntR/O Mount

R/O Mount

Read only Read only Read only

Read write

Cloud ServiceInstance

Cloud ServiceInstance

Cloud ServiceInstance

VM

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Stateful Disk with Azure Drive How to mount a read-only (snapshotted) drive:

var localResource = RoleEnvironment.GetLocalResource("LocalDriveCache");

CloudDrive.InitializeCache(localResource.RootPath, localResource.MaximumSizeInMegabytes);

var storageAccount = CloudStorageAccount.FromConfigurationSetting(“LuceneVHDs");

var client = storageAccount.CreateCloudBlobClient();

var container = new CloudBlobContainer("vhds", client);

var pageBlob = container.GetPageBlobReference(“lucene.vhd");

var drive = new CloudDrive(pageBlob.Uri, storageAccount.Credentials);

drive = new CloudDrive(drive.Snapshot(), storageAccount.Credentials);

var driveLetter = drive.Mount(localResource.MaximumSizeInMegabytes, DriveMountOptions.None);

//e.g.: driveLetter = “H:”

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Stateful Disk with Azure Drive Delete the snapshot after using it (Role.OnStop)

Use additional logic to “clean-up” unused/old snapshots.

How to list snapshots of a blob:

var pageBlob = container.GetPageBlobReference(“lucene.vhd");

var snapshots = container.ListBlobs(new BlobRequestOptions()

{

BlobListingDetails = BlobListingDetails.Snapshots,

UseFlatBlobListing = true,

}).OfType<CloudPageBlob>().Where((blob) => blob.SnapshotTime.HasValue && blob.Uri.Equals(pageBlob.Uri)).OrderByDescending((blob)=>blob.SnapshotTime).ToList();

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Automated Configuration and Monitoring

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Automated Configuration Role.OnStart

Role

RoleEnvironment.Changing += RoleEnvironment_Changing;

void RoleEnvironment_Changing(object sender, RoleEnvironmentChangingEventArgs e){

MyApplyChanges(e.Changes);

e.Cancel = MyCheckIfNeedsToReboot();}

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Automated Monitoring Role.OnStart

Role

RoleEnvironment.StatusCheck += RoleEnvironment_StatusCheck;

void RoleEnvironment_StatusCheck(object sender, RoleInstanceStatusCheckEventArgs e){

var isHealthy = CheckMyHealth();

if (!isHealthy) e.SetBusy();}

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Other Tips

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Reduce the size of the Package Put static files (images, videos, JavaScript, CSS) in the Blob Storage. Adjust the URLs to these resources.

Put installers and large executables in the Blob Storage. Download these files locally using Startup Tasks / Role.OnStart

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Prefer Async Processing Use the Queue Storage or Service Bus (Queues, Topics and Notification Hub) to distribute work and scale processing

Use the .NET framework 4.5 parallel and async features

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Proactive Caching All instances read from the cache

One instance is responsible to update the cache periodically

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Distribute Users and Content Use CDN to distribute and cache the content (Blobs / Web Roles)

Use the Traffic Manager to direct users to the closest datacenter

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Advanced Cloud Services Development (PaaS)

Vitor CiaramellaTechnical Evangelist, Microsofthttp://vic.ms

Azure Summit Brazil 2013