Nov 22, 2014

Upgrade an Application Windows Azure OS Family

Recently I add to upgrade an web site running in Azure Webrole from Azure OS famille 1.6 to a more recent version. While the migration was not complicated I encounter some little particularity that I found could be interesting to share.

The Context

The website was a Visual Studio 2010 project using Azure SDK 1.6 and a library call AspNetProvider that was part of Microsoft's sample few years ago to manage session and membership. Using the AspNetProvider library the session was saved in Azure blob storage, and the membership was saved in an SQL database.

The Goal

The application must stay a Visual Studio 2010 project, but using the most-recent Azure SDK and Azure Storage Client as possible.

The Solution

  • Azure SDK 2.1
  • Azure.StorageClient 4.0
  • Universal Provider version 2.1
  • OS famille 4

The Journey

Migration from SDK 1.6 to SDK 2.1

Azure SDK version 2.1 is the higher version compatible with Visual Studio 2010. And can be downloaded from Microsoft's website. Once it is installed, just open the project in Visual Studio and right-click on the Azure Project. By clicking on the upgrade button the magic will happen. Some errors could stay but the hard work will be done for you.

Migration from AspNetProvider to UniversalProvider

we need to remove all reference to the AspNetProvider library. Just expand the resources node in the Solution Explorer and delete the reference. One thing important is that since we are using Visual Studio 2010 the latest version of the UniversalProvider we can use is 1.2. More recent version are using .Net 4.5 and this is not compatible with the present solution. To get the reference added to the project just execute the following Nugget command:
Install-Package UniversalProvider -version 1.2

Check the web.config file to clean the membership connections.

Migration of the Azure Storage Client

This one is the easiest, just remove the reference in the reference node and then execute the following Nugget Command:
Install-Package Azure.Storage.Client

Migration of the membership data

The AspNetProvider was using prefixed SQL tables: aspnet_user, aspnet_membership, etc. The new membership manager is using another sets of tables. We must migrate the data from one set to the other one. Here a SQL script that will to exactly that. The script can be run multiple times because it will only copie the unmoved data.
-- ========================================================
-- Description:    Migrate data from asp_* tables 
--                 to the new table used by Universal provider
-- ========================================================


-- --------------------------------------------------------
-- Applications -------------------------------------------

INSERT INTO dbo.Applications (ApplicationName, ApplicationId, Description)
    SELECT    n.ApplicationName, n.ApplicationId, n.Description 
    FROM    dbo.aspnet_Applications o 
    LEFT    JOIN dbo.Applications n ON o.ApplicationId = n.ApplicationId
    WHERE    n.ApplicationId IS NULL

SELECT @CNT_NewTable = Count(1) from dbo.Applications 
SELECT @CNT_OldTable = Count(1) from aspnet_Applications

PRINT 'Application Count: ' + CAST(@CNT_NewTable AS VARCHAR) + ' = ' + CAST(@CNT_OldTable AS VARCHAR)

-- -------------------------------------------------------- 
-- Roles --------------------------------------------------

INSERT INTO dbo.Roles (ApplicationId, RoleId, RoleName, Description)
SELECT    o.ApplicationId, o.RoleId, o.RoleName, o.Description 
FROM    dbo.aspnet_Roles o
LEFT JOIN dbo.Roles n ON o.RoleId = n.RoleId

SELECT @CNT_NewTable = Count(1) from dbo.Roles 
SELECT @CNT_OldTable = Count(1) from aspnet_Roles

PRINT 'Roles Count : ' + CAST(@CNT_NewTable AS VARCHAR) + ' = ' + CAST(@CNT_OldTable AS VARCHAR)

-- --------------------------------------------------------
-- Users --------------------------------------------------

INSERT INTO dbo.Users (ApplicationId, UserId, UserName, IsAnonymous, LastActivityDate)
SELECT o.ApplicationId, o.UserId, o.UserName, o.IsAnonymous, o.LastActivityDate 
FROM dbo.aspnet_Users o LEFT JOIN dbo.Users n ON o.UserId = n.UserID 

SELECT @CNT_NewTable = Count(1) from dbo.Users 
SELECT @CNT_OldTable = Count(1) from aspnet_Users

PRINT 'Users count: ' + CAST(@CNT_NewTable AS VARCHAR) + ' >= ' + CAST(@CNT_OldTable AS VARCHAR)

-- --------------------------------------------------------
-- Memberships --------------------------------------------

INSERT INTO dbo.Memberships (ApplicationId, UserId, Password, 
PasswordFormat, PasswordSalt, Email, PasswordQuestion, PasswordAnswer, 
IsApproved, IsLockedOut, CreateDate, LastLoginDate, LastPasswordChangedDate, 
LastLockoutDate, FailedPasswordAttemptCount, 
FailedPasswordAttemptWindowStart, FailedPasswordAnswerAttemptCount, 
FailedPasswordAnswerAttemptWindowsStart, Comment) 

SELECT o.ApplicationId, o.UserId, o.Password, 
o.PasswordFormat, o.PasswordSalt, o.Email, o.PasswordQuestion, o.PasswordAnswer, 
o.IsApproved, o.IsLockedOut, o.CreateDate, o.LastLoginDate, o.LastPasswordChangedDate, 
o.LastLockoutDate, o.FailedPasswordAttemptCount, 
o.FailedPasswordAttemptWindowStart, o.FailedPasswordAnswerAttemptCount, 
o.FailedPasswordAnswerAttemptWindowStart, o.Comment 
FROM dbo.aspnet_Membership o
LEFT JOIN Memberships n ON  o.ApplicationId = n.ApplicationId
                      AND o.UserId = n.UserId
WHERE n.UserId IS NULL AND n.ApplicationId IS NULL

SELECT @CNT_NewTable = Count(1) from dbo.Memberships 
SELECT @CNT_OldTable = Count(1) from aspnet_Membership

PRINT 'Memberships count: ' + CAST(@CNT_NewTable AS VARCHAR) + ' >= ' + CAST(@CNT_OldTable AS VARCHAR)

-- -------------------------------------------------------
-- UsersInRoles ------------------------------------------
INSERT INTO dbo.UsersInRoles SELECT * FROM dbo.aspnet_UsersInRoles

SELECT @CNT_NewTable = Count(1) from dbo.UsersInRoles 
SELECT @CNT_OldTable = Count(1) from aspnet_UsersInRoles

PRINT 'UsersInRoles count: ' + CAST(@CNT_NewTable AS VARCHAR) + ' >= ' + CAST(@CNT_OldTable AS VARCHAR)

Migration from OSFamilly 1 to 4

Open the file .cscfg and edit the OS Family attribute. It's in the ServiceConfiguration node.
<ServiceConfiguration servicename="MyApp" osFamily="4" osVersion="*" ...>    

Wrapping up

The only step left is to deploy in the staging environment to see if everything is working as expected. would recommend also to plan to upgrade as soon as possible because the Azure SDK 2.1 official retirement date is November 2015. I hope this post could help you, even if you are migrating from and to a different version. Any comments, suggestions and/or questions are welcome.

~ Frank Boucher

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