Most conference presentations will share “best practices”. That’s not this presentation. In this session we'll discuss what NOT to do. These surefire fail activities are inspired from real customer engagements (names changed to protect the innocent). Looking at the unsuccessful architecture and development patterns of others can help us not repeat the same mistakes in future cloud projects. -- This was originally presented at StirTrek 2014. --

1. 10 Ways to Guarantee Your
Microsoft Azure Project Will Fail!

3. 15

4. Central Ohio Cloud Computing
User Group
What
When
Where
More Information

5. This is a talk on what NOT to do.
Inspired by real projects . . . . Real people did this stuff!
Names withheld to protect the
“innocent”.
Do and you will #FAIL
and you’re paying me a lot of money to fix your $^!+ . . . . 
Justice is Served
http://cheezburger.com/8106642432

6. http://3.bp.blogspot.com/-3d9Cp2RCaH8/TalXvZKqqDI/AAAAAAAAFUc/0j4E-2rJ6qw/s1600/angry-baby-6.jpg
More PowerPoint?!?

7. Manual deployments . . . #1 technique

8. Use PowerShell to script the process
New-AzureService -ServiceName $MyServiceName -Location $MyServiceLocation
New-AzureStorageAccount -StorageAccountName $MyStorageAccountName `
-Location $MyStorageLocation -Verbose
New-AzureSqlDatabaseServer –AdministratorLogin $credential.UserName `
-AdministratorLoginPassword ` $credential.GetNetworkCredential().Password `
-Location $Location
New-AzureDeployment -ServiceName $MyServiceName -Slot Production `
-Configuration $MyConfigurationFilePath -Package $MyPackageFilePath
New-AzureQuickVM -Windows -ServiceName $svcName -Name $vmName `
-ImageName $image.ImageName -Location $location -AdminUsername $user -
Password $pass

9. Single sub for Development, QA, and Production
Quotas

10. FALSE
Microsoft Azure provides anti-virus protection

11. Microsoft Azure automatically protects against DDOS
FALSE
Being successful looks a lot like a DDOS

12. SQL Database supports encryption (TDE)
FALSE

13. Web Role Worker RoleStorage Queue SQL Database
(Microsoft Azure)

14. Web Role Worker RoleStorage Queue SQL Database
(Microsoft Azure)
IIS limitations 20,000 tx per account*
2,000 msgs/sec
150 GB per DB
Transient Faults
/ Throttling

15. Worker Role
OWIN/Katana
ASP.NET Web API
Worker Role
Storage Account
SQL Database
(Microsoft Azure)
Batch messages
Retry
Table Storage

16. Managing infrastructure in cloud is like on-premises
Virtual Network
X
10.0.0.36

17. Managing infrastructure in cloud is like on-premises
Virtual Network
10.0.0.8

18. Managing infrastructure in cloud is like on-premises
Virtual Network
10.0.0.8

19. public class OrderRepository
{
public OrderRepository()
{
}
public void Add(Order order)
{
using (var ctx = new OrderDbContext())
{
ctx.Orders.Add(order);
ctx.SaveChanges();
}
}
}

20. public class OrderRepository
{
private readonly RetryPolicy policy =
new RetryPolicy<SqlDatabaseTransientErrorDetectionStrategy>(RetryStrategy.DefaultExponential);
public OrderRepository()
{
policy.Retrying += (sender, args) =>
{
// Write log statement
};
}
public void Add(Order order)
{
policy.ExecuteAction(() =>
{
using (var ctx = new OrderDbContext())
{
ctx.Orders.Add(order);
ctx.SaveChanges();
}
});
}
}
Retry Frameworks
Transient Fault Handling Application Block / “TOPAZ”
EF6
Windows Azure Storage Client Library

21. Services will fail
Scenario
What could possibly go wrong?

22. Constrain the Retry
http://mcollier.net/1eCyTDu

23. “Our site can’t go down. 100% uptime is the requirement.”
NO CLOUD
FOR YOU!
Cost Impact

24. What is wrong here?
web role web role
WASABi Auto-Scaler
worker role
crazy.cloudapp.net

25. Include scaler in a separate cloud service
web role web role
WASABi Auto-Scaler
worker role
crazy.cloudapp.net
crazy-scale.cloudapp.net

26. Include scaler in a separate cloud service

27. “Azure will auto-scale when we’re busy”
FALSE

28. “Azure will auto-scale when we’re busy”
FALSE
X
X

29. Scenario
web role instances
load balancer

30. Scenario
web role instances
load balancer

31. The Test
The Cause
These are not “Azure” problems!

32. Scenario
Cloud? EW EW

33. Scenario

34. You’re kidding? Right?

35. Instrumentation

36. Instrumentation Telemetry

38. 3 Truths of Cloud Computing
Microsoft blog post on RCA of leap day bug in 2012