Azure Stack IaaS – part eight
If you do it often, automate it
In the virtualization days, before cloud and self-service, it took a while to get all the approvals, credentials, virtual LANs (VLANs), logical unit numbers (LUNs), etc. It took so long, that the actual creation part was easy. When cloud came along with self-service, not only was it easier to create a virtual machine (VM) without relying on others, but it changed our thinking about whether VMs were precious or disposable. At the same time developers were moving to a world of continuous delivery to serve their customers who expect apps with a constant stream of new features. This is the reason all real clouds provide automation APIs to quickly create VMs and other resources, including the infrastructure they rely on. This is often called “Infrastructure as code.” Azure’s API is governed by the Azure Resource Manager (ARM). When you set up Azure Stack, you get your own private instance of ARM.
In this blog post I will cover the automation options in your Cloud IaaS toolkit.
Azure portal
The best place to learn this is from first completing a VM deployment through the portal. Azure Stack provides the same portal as Azure. When you get to the last confirmation page, click the Download Template link. This will show you the template that will be used to deploy the VM you just specified on the previous screens.
As you look through the template – which is in JSON format – you can see how the virtual machine, network, and storage is defined. You’ll see an OS profile and hardware profile for your VM. Using this template, you could deploy this same VM over and over. This is perfect if you’re helping your developers with Continuous Integration and Delivery (CI/CD).
One thing about an ARM template is it is not a procedural script like you might get with standard automation tools. This template creates the resources as a single deployment transaction. ARM will either get to the goal state or the deployment will fail. If it fails, you have a chance to fix failure condition and move forward or delete the deployment and start over. This way you don’t get something other than what you specify.
Once you save your template, you can redeploy it in the portal, using the Template deployment item in the marketplace:
Learn more:
Azure Resource Manager overview
Quickstart: Create templates using the Azure Portal
Deploy resources in the portal using a custom template
Visual Studio and Visual Studio Code
Visual Studio can be scary for an infrastructure person, but if you can master some simple things, you can really help your team down the road of automation. The biggest thing that Visual Studio provides is the real-time feedback that you’re authoring the ARM JSON template correctly in terms of syntax. You don’t get this in Notepad. Get started by creating a new Azure Resource Group project:
A great way to start authoring a template is to use Quickstart templates. Azure Stack has a number of Quickstart templates you can use. When you start your new project in Select Azure Template, pick Azure Stack Quickstart from the drop-down list.
Visual Studio not only helps you author the template, it allows you to deploy the template directly to Azure Stack. When you sign into Visual Studio, all of your subscriptions in both Azure and Azure Stack show up as deployment targets. Since I use a number of Azure Stack environments, I have lots of deployment options:
Another way to create these templates is in Visual Studio Code. The ARM template is a JSON file, so you need a good lightweight authoring tool to work on the JSON file. Visual Studio Code (VS Code) is a great option.
After installing VS Code, you need to add the Azure Resource Manager Tools extension. This extension adds many features that simplify template authoring that help you manage variables, parameters, and resource blocks with features like including formatting and color coding. Check it out in the image below:
Learn more:
Install Visual Studio and Connect to Azure Stack
Deploy templates to Azure Stack using Visual Studio
Create a template in Visual Studio
Create a template in Visual Studio Code
PowerShell and Azure command-line interface
The Portal and Visual Studio are both deployment options for your template. PowerShell and the Azure command-line interface (CLI) are two other options. Since Azure Stack is your own private instance of the Azure Resource Manager, you need to connect to your unique instance.
To connect to Azure Stack with PowerShell, use the Add-AzureRMEnvironment cmdlet, specifying the ARM endpoint for your environment. Depending on how your Azure Stack environment has been set up, you will either authenticate using your Azure Active Directory credentials or your organization’s Azure Directory (referred to in the documentation as ADFS).
Azure CLI is Microsoft's cross-platform command-line experience for managing Azure resources. It works on Mac, Linux, and Windows. In Azure you can run the CLI in Cloud Shell. You can use Azure CLI to connect to Azure Stack and deploy IaaS templates. Just like PowerShell, you need to first connect to your Azure Stack’s unique ARM endpoint. For CLI you use the az cloud register command. To deploy your ARM template you use the az group deployment create command.
Please note: We have not implemented Cloud Shell on Azure Stack yet. Cloud Shell allows you to run the Azure CLI directly inside your browser. If you would like to see this, make sure you put in a vote on Azure Cloud Shell UserVoice.
Learn more:
Install PowerShell for Azure Stack
Connect to Azure Stack with PowerShell
Deploy in Azure Stack with PowerShell
Use Azure CLI on Azure Stack
Deploy Azure Resource Manager Templates with Azure CLI
The cloud is for automation
The more people use clouds like Azure and Azure Stack, the less they use the portal and the more they use automation. There is an automation option in Azure and Azure Stack for all your needs. Say goodbye to virtualization and say hello to Cloud IaaS with your automation toolkit.
In this blog series
We hope you come back to read future posts in this blog series. Here are some of our past and upcoming topics:
- Azure Stack at its core is an Infrastructure-as-a-Service (IaaS) platform
- Start with what you already have
- Fundamentals of IaaS
- Protect your stuff
- Do it yourself
- Pay for what you use
- Build on the success of others
- Journey to PaaS
Source: Big Data