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June 20, 2011

Using PowerShell with Windows Azure

Posted by Bill Wilder under Azure, Boston Azure User Group, Cloud Computing, Programming | Tags: |
1 Comment 

At the May 26, 2011 Boston Azure User Group meeting, Joel Bennett – a Microsoft PowerShell MVP from the Rochester, NY area – spoke about PowerShell basics, then got into a bunch of useful ways PowerShell can be applied to Windows Azure. We had around 25 people at the event.

[Update 23-June-2011: Joel Bennett posted his slide deck from the talk.] 
[Update 05-July-2011: Added another handy link to post from Patrick Butler called Developing and Debugging Azure Management API CmdLets.]

Some of the pointers:

  • Go get the PowerShell Community Extensions (from codeplex)
  • You can use the PS command line to CD into folders/directories, look at files, etc. — but you can also look at the Registry or your Certificate Store as if they were directories!
  • There are no plural nouns in PS (e.g., get-provider, not get-providers)
  • Learn these commands first: Get-Command, Get-Help, Get-Member, Select-Object, Where-Object, Format-Table, … others you can learn later
  • Somebody needs to write a PowerShell Provider for Azure Storage
  • Joel created an open-shell WPF-ish PowerShell shell called POSH

Try some commands:

  • dir | get-objec
  • dir | fl *  –formats as lis
  • get-verb | fw -col
  • get-verb | fw -col 6 -groupby Group
  • Get-ExecutionPolicy
  • dir | where { $_.PSIsContainer } – where $_ is “the thing over there (directory)”
  • dir | select CreationTime, Name | gm
  • dir | select * –will look different than command above
  • $global:foo = “some value”
  • cd c:\windows\system32\windowspowershell\v1.0… see Help.format.ps1xml controls the default output formatting properties for object types not already known by PowerShell – can have property names, even script blocks in it – very powerful
  • # is single-line comment char; <# … #> for multi-line comments
  • You can create aliases for scripts
  • Powershell is an interpreted scripting language
  • Can access WinForms, WPF, lots of stuff.. though not Threading

Three ways to manage Azure from PowerShell

  1. Remoting
  2. WASM (Windows Azure Services Management commandlets) – superceded by http://wappowershell.codeplex.com/ – developed by Development Evangelist group (e.g., Vittorio)
  3. Cerebrata (3rd party, commercial)

Remoting:

  • Need to get some goodness in a Startup Script, along with crecentials
  • Set OS Family = 2 (so you get Windows Server 2008 R2)
  • Need a certificate – can be self-signed

WAP PowerShell:

  • 36 Cmdlets
  • “the 80% library”
  • very good example

Cerebrata Cmdlets

  • Requires .NET 4.0 (which is different than baseline support for PS, which is .NET CLR 2.0
  • $70
  • 114 Cmdlets
  • Cerebrata
  • gcm –mo cerebrata | gr0up Noun | sort

Snap-ins need to be in the GAC – so put WAP PowerShell stuff where you want to keep them, since that’s where they’ll be built — or build the file in Visual Studio

  • Add-Module is for SNAPINS
  • IPMO is for ImportModule for Modules
  • ipmo AzurePlatform
  • gcm –mo AzurePlatform

PowerShell has something called “splatting”

  • Starting with a hashtable… put in the parms you’ll need
  • variables start with $
  • retrieving (splatting) starts with @

Both cerebrata and WAP are snap-ins

WHAT FOLLOWS… are somewhat random notes I captured…

Get-Certificate $azure | Get-HostedCertificateStore

Your personal profile for PowerShell lives in c:\Users\YOURNAME\Documents\WindowsPowerShell\Modules\AzurePlatform as Startup.ps1 (?)

Two kinds of errors in PowerShell: 1. Terminating Errors (exceptions, can be “trapped” or use try/catch as of PS2) and 2. Non-Terminating Errors which are harder to deal with

$? ==> did the last command succeed

dir doesnotexist –ev er –ea “”

$er[0].categoryinfo

“Don’t Produce Snap-ins!” Here’s why: to figure out what is in there (get-command –Module

Get-Module –ListAvailable

- run the above on AZure and see “NetworkLoadBalancingCl…” – is this Azure relate

OTHER INTERESTING POWERSHELL/AZURE LINKS

 

 

June 17, 2011

Writing to Azure Local Storage from a Windows Service

Posted by Bill Wilder under Azure, Cloud Computing, Programming
1 Comment 

As you may know, Windows Azure roles do not generally write freely to the file system. Instead of hard-coding a path into our code, we declare in our service model that we plan to write data to disk, and we supply it with a logical name. We can declare multiple such logical names. Windows Azure uses these named locations to provide us managed local, writeable folders which it calls Local Storage.

To specificy your intent to use a Local Storage location, you add an entry to ServiceDefinition.csdef under the specific role from which you plan to access it. For example:

<LocalStorage name="LocalTempFolder" sizeInMB="11"
      cleanOnRoleRecycle="true" />

You can read more about the details over in Neil Mackenzie’s post, but the main thing you need to do is call a method to access the full path to the read/write folder associated with the name you provided (e.g., “LocalTempFolder” in the config snippet above). The method call looks like this:

LocalResource localResource =
      RoleEnvironment.GetLocalResource("LocalTempFolder");
var pathToReadWriteFolder = localResource.RootPath;
var pathToFileName = pathToReadWriteFolder + "foo.txt";

Now you can use ”the usual” classes to write and read these files. But calling RoleEnvironment.GetLocalResource only works from within the safe confines of a your Role code – as in a Worker Role or Web Role – you know, the process that inherits from (and completes) the RoleEntryPoint abstract class. What happens if I am inside of a Windows Service?

Your Windows Service Has Super Powers

Well… your Windows Service does not exactly have Super Powers, but it does have powers and abilities far above those of ordinary Roles. This is due to the differences in their security contexts. Your Windows Service runs as the very powerful LocalSystem account, while your Roles run as a lower priviledge user. Due to this, your Windows Service can do things your Role can’t, such as write to the file system generally, access Active Directory commands, and more.

[Your Startup Tasks might also have more powers than your Roles, if you configure them to run with elevated privileges using executionContext="elevated" as in:
<Task commandLine="startuptask.cmd" executionContext="elevated" />
See also David Aiken's post on running a startup task as a specific user.]

However, there are some things your Windows Service can’t do, but that your Role can: access RoleEnvironment!

Problem Querying Local Storage from a Windows Service

Inside of a Windows Service (which is outside of the Role environment), the RoleEnvironment object is not populated. So, for example, you cannot call

RoleEnvironment.GetLocalResource("LocalTempFolder")

and expect to get a useful result back. Rather, an exception will be raised.

But here’s a trick: it turns out that calling RoleEnvironment.GetLocalResource returns the location of the folder, but it is just the location of a folder on disk at this point – this folder can be accessed by any process that knows about it. So how about if your Web  or Worker Role could let the Windows Service know where its storage location happens to be? (As an aside, we have a good idea where they might ultimately end up on disk in practice (see last section of this post) – but of course subject to variability and change – but it is useful if you want to poke around on your local machine or through Remote Desktop to an instance in the cloud.)

The Trick: Pass the Local Storage location into your Windows Service

If you are deploying a Windows Service along with your Role, you will need to install the Windows Service and you will need to start the Windows Service. A reasonable way to install your Windows Service is to use the handy InstallUtil.exe program that is included with .NET. Here is how you might invoke it:

%windir%\microsoft.net\framework\v4.0.30319\installutil.exe
      MyWindowsService.exe

Now the Windows Service is installed, but not running; you still need to start it. Here is a reasonable way to start it:

net start MyWindowsServiceName

Typically, both the InstallUtil and net start commands would be issued (probably in a .bat or .cmd file) from a Startup Task. But there is another way to start an installed Windows Service which allows some additional control over it, such as the ability to pass it arguments. This is done with a few lines of code from within the OnStart method of your Role, such as in the following code snippet which uses the .NET ServiceController class to get the job done:

var windowsServiceController =
      new System.ServiceProcess.ServiceController
            ("MyWindowsServiceName");
System.Diagnostics.Debug.Assert(
      windowsServiceController.Status ==  
      windowsServiceControllerStatus.Stopped);
windowsServiceController.Start();

Putting together both acquiring the Local Storage location and starting the Windows Service, your code might look like the following:

string[] args = { 
      RoleEnvironment.GetLocalResource
            ("LocalTempFolder").RootPath
      }
var windowsServiceController =
      new System.ServiceProcess.ServiceController  
            ("MyWindowsServiceName");
System.Diagnostics.Debug.Assert(
      windowsServiceController.Status == 
      windowsServiceControllerStatus.Stopped);
// pass in Local Storage location
windowsServiceController.Start(args);

Within your Windows Service’s OnStart method you will need to pick up the arguments passed in, which at that point has nothing specific to Azure. Your code might look like the following:

protected override void OnStart(string[] args)
{
   var myTempFolderPath = args[0];
   // ...
}

That oughta do it! Please let me know in the comments if you find this useful.

 

May 26, 2011

June 2011 Azure Cloud Events in Boston Area

Posted by Bill Wilder under Azure, Cloud Computing, Events, Programming
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Are you interested in Cloud Computing generally, or specifically Cloud Computing using the Windows Azure Platform? Listed below are the upcoming Azure-related events in the Greater Boston area which you can attend in person and for FREE (or at least inexpensively).

Since this summary page is – by necessity - a point-in-time SNAPSHOT of what I see is going on, it will not necessarily be updated when event details change. So please always double-check with official event information!

Know of any more cloud events of interest to the Windows Azure community? Have any more information or corrections on the events listed? Please let us know in the comments.

They are listed in the order in which they will occur.

[10-June-2011 - added the New England ASP.NET Professionals User Group talk on June 15; I am the featured speaker. Moved Kyle Quest's cloud hackathon to new date: June 16.]

1. 24 Hours in the Cloud – Cloud Scalability Patterns for the Windows Azure Platform

Note: GITCA’s 24 Hours in the Cloud event begins on Wed June 1 and ends on Thu June 2. This post just highlights the talk I am giving. There are MANY OTHER talks you may wish to check out. Many of the talks are IT Pro-oriented.

  • when: Thurs June 2, 5:00 – 6:00 AM (yes, in the MORNING, Boston time) [changed to earlier still! I was rescheduled to begin at 5:00 AM!]
  • where: Online – see below for registration
  • cost: Free
  • what: Talk on scalability patterns that are important for cloud applications; my session consists of a 40 minute (pre-recorded) talk, followed by 20 minutes of live Q&A. Since the talks are pre-recorded, speakers will be able to respond to questions from Twitter during the talk (then again in the live Q&A at the end) via the #24HitC hashtag. My twitter handle is @codingoutloud.
  • more info & Register: http://sp.gitca.org/sites/24hours
  • twitter: #24HitC

2. CloudCamp Boston

3. Beantown .NET Meeting – Architecture Patterns for Scalability and Reliability

4. Hack the Cloud – Cloud Platform Bake-Off

Moved to June 16th – see below

5. New Hampshire Code Camp – Concord, NH

  • when: Sat 04-June-2011, 8:00 – 4:00 PM
  • where: New Hampshire Technical Institute 31 College Drive Concord, NH 03301
  • wifi: not sure
  • food: I think they do dinner afterwards
  • cost: FREE
  • what: In the Code Camp spirit, come learn many things from many people!
  • more info: here or at www.nhdn.com
  • register: here
  • twitter: (not sure)

6. The Architect Factory

  • when: Thu 09-June-2011, 1:00 – 8:00 PM
  • where: Hosted at NERD Center
  • wifi: Wireless Internet access will be available
  • food: (not sure of details yet)
  • cost: FREE
  • what: Real, Practical Guidance on becoming and Architect, or becoming a Better Architect
  • more info: http://architectfactory.com/
  • register: http://architectfactory-eorg.eventbrite.com/
  • twitter: #architectfactory or #af3 (not sure which is “official”)

7. New England ASP.NET Professionals Group

  • when: Wed 25-June-2011, 6:15 – 8:30 PM
  • where: Microsoft Office on Jones Road, Waltham
  • wifi: no
  • food: group does to dinner afterwards
  • cost: FREE
  • what: A talk that introduces Cloud Computing and the Windows Azure Platform and shows how it relates to the ASP.NET developer – tools, libraries, and how to build and deploy.
  • more info: http://neasp.net/
  • register: see http://neasp.net/
  • twitter: (not sure)

8. Hack the Cloud – Cloud Platform Bake-Off

9. 4th Annual Hartford Code Camp

  • when: Sat 18-June-2011, 8:00 – 5:30 PM
  • where: Hosted at New Horizons Learning Center (Bloomfield CT)
  • wifi: Wireless Internet access will be available
  • food: Pizza and drinks will be provided
  • cost: FREE
  • what: In the Code Camp spirit, come learn many things from many people!
  • more info: http://ctdotnet.org/
  • register: see http://ctdotnet.org/ until a direct link is published
  • twitter: (not sure)

10. Boston Azure User Group meeting: Rock, Paper, Azure Event!

  • when: Thu 23-June-2011, 6:00 – 8:30 PM (come at 5:30 if you need help getting set up)
  • where: Hosted at NERD Center
  • wifi: Wireless Internet access will be available
  • food: Pizza and drinks will be provided
  • cost: FREE
  • what: Bring your Windows Azure-ready laptop (or get a loaner, or pair up with someone) as we go head-to-head in an Azure programming contest (it is a simple game, but you will compete with others in the room). Also, there will be prizes – like an Xbox 360, Kinect, and other goodies.
  • more info: See Boston Azure cloud user group site for details or see Jim O’Neil’s blog post on the event. Of special note is to request your free account (no credit card, etc. – easy), following details on Jim’s post - takes only a minute of YOUR time, but will help make sure you don’t need to wait for it on Thurs night – do it NOW! :-)
  • register: here
  • twitter: #bostonazure

11. Maine Bytes: Azure State of the Union

  • when: Thu 30-June-2011, 6:00 – 8:00 PM
  • where: Unum’s Home Office 3 building at 2211 Congress Street in Maine
  • wifi:
  • food:
  • cost: FREE
  • what: Ben Day will give a talk: “Microsoft’s Azure platform moves fast and new features get added all the time. It can definitely be tough to keep up. In this session, Ben will give you a tour around the current features and offerings in Azure with some tips on how to use them in your applications and how to integrate Azure into your software development process.”
  • more info: See http://www.mainebytes.org/ for details
  • register:
  • twitter:

Coming in July:

  • Boston Azure User Group meeting on July 28
  • And more? Please let me know in the comments if you know about an event relevant to those who care about the Windows Azure Platform

Omissions? Corrections? Comments? Please leave a comment or reply on the Twitters!

 

May 25, 2011

Spoke about Azure and Cloud at New Hampshire .NET User Group

Posted by Bill Wilder under Azure, Bill gave a talk, Cloud Computing, Events, Programming | Tags: |
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I was the guest speaker at the May 25th meeting of the New Hampshire .NET (NHDN) user group in Concord, NH at the New Hampshire Technical Institute.

Here is the slide deck I used for the talk: Demystifying Cloud Computing and the Windows Azure Platform.

 

May 15, 2011

Join the TechEd Windows Phone 7 Unleashed Hackathon

Posted by Bill Wilder under Azure, Windows Phone 7 | Tags: |
1 Comment 

Windows Azure + Windows Phone 7 = Better Together!

Find out why on Monday May 16 @ TechEd in Atlanta – at the FREE After-Hours Dinner-Included Hackathon!

Windows Phone 7 Unleashed Hackathon
Monday, May 16, 2011
6:00 PM to 11:00 PM
Register: http://bit.ly/RegWP7Hackathon

Don’t miss this opportunity to get hands-on help with your Windows Phone 7 app, from the experts!

This is a “hands on” hackathon where you will learn from Windows Phone 7, XNA and Azure experts how to build, scale and publish your Windows Phone 7 app or game. If you are just a beginner, or already have apps in the Marketplace this event should not be missed.

Come hear about new developments that will help you combine the power of the Windows Phone with the Windows Azure cloud platform.

BYO Laptop! And prepare yourself for an energetic evening of fun, learning, and accomplishment!

RSVP early, as space is limited to 300 attendees: http://bit.ly/RegWP7Hackathon

Food, beverages and refreshments will be provided.

 

May 11, 2011

Cure for “NO INSTALLATION MEDIA” Error when Zune Installer Can’t Find the Media for Installation Package

Posted by Bill Wilder under How To, Programming, Step-by-Step, Windows Phone 7 | Tags: , |
[3] Comments 

How I got around Zune’s “NO INSTALLATION MEDIA” and “Can’t Find the Media for Installation Package” error

 I recently reinstalled Windows 7 on one of my computers and in rebuilding my development tool set, including for Windows Phone, and found I could not run a Windows Phone 7 project locally: Visual Studio complained I did not have the Zune software installed. Okay, not a problem; I will install Zune. But not so fast…

I encountered the following mysterious error while trying to install the Zune software to my Windows 7 desktop.

What does this Zune error message mean?

 
Looking at the text of the message did not help me or yield obvious clues:

NO INSTALLATION MEDIA

Can’t find the media for installation package ‘Windows Media Format SDK’. It might be incomplete or corrupt.

Error code: 0×80070002

Searching around the internets did not help, though I saw a reference to do a few things, one of which was to install the latest Windows Media Player. Well… it turns out, I had NO version of the Windows Media Player installed, so I simply installed the latest, and the Zune installer was happy…

One more step

But Visual Studio 2010 was NOT yet willing to allow me to run the Windows Phone 7 emulator to test and debug my Windows Phone applications. I saw the following additional (but improved!) errors from Visual Studio.

First, could not deploy. Nothing new here:

But the reason provided looked more promising:

This is a better known error, easily rectified. Simply switch to the emulator if your project is referencing an attached device, done at the top of Visual Studio as shown here:

Okay… now back to Windows Phone 7 development – of course, with a Windows Azure back-end using the Windows Azure Toolkit for Windows Phone 7.

 

May 2, 2011

May 2011 Azure Cloud Events in Boston Area

Posted by Bill Wilder under Azure, Boston Azure User Group, Cloud Computing, Events, Programming
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Are you interested in Cloud Computing generally, or specifically Cloud Computing using the Windows Azure Platform? Listed below are the upcoming Azure-related events in the Greater Boston area which you can attend in person and for FREE (or at least inexpensively).

They are listed in the order in which they will occur.

Know of any more cloud events of interest to the Windows Azure community? Have any more information or corrections on the events listed? Please let us know in the comments.

1. New England Code Camp

  • when: Sat 07-May-2011, 8:30 AM – 6:00 PM
  • where: Microsoft Waltham (Jones Road)
  • wifi: (unknown, but probably just for speakers)
  • food: Provided (usually pizza & salad)
  • cost: Free
  • what: Developer-focused mini-conference on a wide range of topics
  • More info & Register: http://thedevcommunity.org

2. Jeffrey Richter from Wintellect will be presenting a free, in-person Windows Azure Deep Dive

  • when: Mon 16-May-2011, all day
  • where: Waltham
  • wifi: (unknown)
  • food: (unknown)
  • cost: FREE (registration required)
  • what: Deep Dive on Windows Azure
  • More info: See Jim O’Neil’s blog post for details
  • Register: Note there are two ways to register from this page – in person, or webinar – the webinar is a link, but the in person event form is on this page directly: https://www.wintellect.com/Training/Webinar/Registration

3. NHDN – New Hampshire .NET – Concord

  • when: Wed 25-May-2011, 6:00 – 8:00 PM
  • where: New Hampshire Technical Institute 31 College Drive Concord, NH 03301, Grappone Hall, Room 106
  • wifi: not sure
  • food: I think they do dinner afterwards
  • cost: FREE
  • what: Demystifying the Cloud and an overview of Microsoft’s public cloud platform, Windows Azure
  • More info: here
  • Register: here

4. Boston Azure User Group meeting on PowerShell and how to use it with Windows Azure

  • when: Thu 26-May-2011, 6:00 – 8:30 PM
  • where: Hosted at NERD Center
  • wifi: Wireless Internet access will be available
  • food: Pizza and drinks will be provided
  • cost: FREE (registration appreciated)
  • what: What is PowerShell, why do you care, and how can you use its awesome power to help with Windows Azure. PowerShell MVP Joel Bennett is the featured speaker.
  • More info: See Boston Azure cloud user group site for details
  • Register: here

Coming in June:

  • 24 Hours in the Cloud
  • Cloud Camp Boston
  • The Architect Factory
  • Boston Azure
  • Beantown .NET (Architecture Patterns in the cloud)
  • Hartford Code Camp
  • New Hampshire Code Camp
  • And more? Please let me know in the comments if you know about an event relevant to those who care about the Windows Azure Platform
 

April 2, 2011

My SQL Saturday Talk: “Storing Data in the Cloud: Beyond SQL Azure”

Posted by Bill Wilder under Azure, Bill gave a talk, Cloud Computing, Events, Programming
1 Comment 

I spoke today at SQL Saturday #71 where I gave a talk on “Storing Data in the Cloud: Beyond SQL Azure” where I talk about the following:

  • What is the Cloud
  • How does SQL Azure compare with SQL Server
  • What are the other storage options available on the Windows Azure Platform

There were many interesting questions from the audience of 20 or so people – One asked (paraphrasing here..) “Are the Microsoft Data Centers resilient to the radiation expected from a nuke” to which I did not have a good answer. To another question, Jeff Mlakar (@JeffMlakar) offered helpfully that the SQL Azure Data Sync service is an option for SQL Azure backups to on-prem and with geo-replicating SQL Azure across data centers.

We didn’t get to the end of the material due to lots of discussion… but we did get through the most critical concepts.

 

April 1, 2011

April 2011 Azure Cloud Events in Boston Area

Posted by Bill Wilder under Azure, Boston Azure User Group, Cloud Computing, Events, Programming
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Are you interested in Cloud Computing generally, or specifically Cloud Computing using the Windows Azure Platform? Listed below are the upcoming Azure-related events in the Boston/Cambridge area which you can attend in person and for FREE (or at least inexpensive).

They are listed in the order in which they will occur.

Know of any more cloud events of interest to the Windows Azure community? Have any more information or corrections on the events listed? Please let us know in the comments.

1. SQL Saturday #71

  • when: Sat 02-Apr-2011, 8:30 AM – 6:00 PM
  • where: Babson College
  • wifi: (unknown)
  • food: Provided
  • cost: Cheap (registration required)
  • what: All about SQL and related topics
  • More info & Register: http://www.sqlsaturday.com/71/eventhome.aspx

2. Cloud Platform Bake-Off led by Kyle C. Quest

  • when: Fri 15-Apr-2011, 10:00 AM – ??? PM
  • where: Hosted at Cafe On the Common, 677 Main Street Waltham, MA (but please DOUBLE CHECK the location at Meetup.com listing)
  • wifi: (unknown)
  • food: (unknown)
  • cost: FREE, but pre-registration appears to be required
  • what: “Putting different cloud platforms head to head is one of the original ideas for Cloud Hackathon. I’m sure lots of people are curious how each platform can measure up to its competition.” This is a coding/hacking event on Windows Azure plus Amazon EC3, Google App Engine, and maybe others.
  • More info: See Meetup.com for details
  • Register: See Meetup.com

3. Boston Azure User Group meeting with David Makogon as featured speaker

  • when: Thu 28-Apr-2011, 6:00 – 8:30 PM
  • where: Hosted at NERD Center
  • wifi: Wireless Internet access will be available
  • food: Pizza and drinks will be provided
  • cost: FREE
  • what: Exact topics to-be-announced, but they will be awesome :-) David Makogon from Microsoft will be featured speaker
  • More info: See Boston Azure cloud user group site for details (soon)
  • Register: (soon)
 

March 11, 2011

Beyond Virtualization – Welcome to the Cloud

Posted by Bill Wilder under Bill gave a talk, Events, Programming
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Virtualization – of the server, desktop, application, storage, network, and more – was a seriously disruptive force in the previous decade. Virtualization – in concert with cheap & capable commodity hardware, automation galore, ubiquitous connectivity, and some new business models – will give way to Cloud Computing during the coming decade.

Today at the Virtualization Boston Deep Dive Day 2011 event (put on by the Virtualization Group-Boston), I joined forces with the ITProGuru (aka Mr. Dan Stolts) to share some thoughts in a presentation on this megatrend – what’s going on, what it means for data centers, and what today’s IT Pro might expect from a Cloud-dominated future.

The slides are available here:

Cloud Computing Essentials for the IT Pro – Bill Wilder and Dan Stolts – 11-Mar-2011

The following was not a slide all by itself, but could have been – and I think I’ll use it next time for the simplest definition I can think of for understanding SaaS, PaaS, IaaS:

I also posted a twitter-sized definition of SaaS, PaaS, and IaaS.

 

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