Noticed Virtual Network and Virtual Network(Classic) in Azure, Wondering what is the difference between them and when to choose what ?
Azure has two different deployment models for creating and working with resources: Resource Manager and classic.
How you create, configure, and manage your Azure resources is different between these two models. In classic mode, each resource provisioned in Azure is a single management unit. You manage all of the resources individually. The classic mode does not allow grouping of resources, which makes managing Azure resources difficult.
Azure resource management mode adds the concept of the resource group, which is a container for resources that share a common lifecycle. In ARM mode, you can deploy, manage, and monitor all the services for your solution as a group, rather than handling these services individually. Also, you can apply tags to resources to logically organize all the resources in your subscription.
When you interact with Classic mode resources from a command line such as Azure PowerShell, you are using Azure Service Management API calls (ASM). ASM is a traditional way of accessing Azure resources. In the Resource Manager mode, you are using Azure Resource Manager Rest API. When a user sends a request from any of the Azure tools, APIs, or SDKs, Resource Manager receives the request. It authenticates and authorizes the request. Resource Manager sends the request to the Azure service, which takes the requested action. See Azure Resource Manager overview.
The Virtual Network(Classic) is used for the classic models. Virtual Network in Azure is created for Resource Manager models. Currently, Microsoft recommends that you use Resource Manager for all new resources. Mostly, the Virtual Network(Classic) is used when you are creating a VNet for cloud services as far as I can tell. For Resource Manager resources, you just need to create Virtual Network in Azure portal.
There are three scenarios to be aware of:
Cloud Services does not support Resource Manager deployment model.
Virtual machines, storage accounts, and virtual networks support both Resource Manager and classic deployment models.
All other Azure services support Resource Manager
Here is a blog about Azure Classic vs Azure Resource Manager
So which one should I use?
Since both modes are viable options at this point, it is necessary to
pay careful attention to the features that each offer and your
specific requirements. ARM cannot simply be assumed to be the best fit
as it simply may not meet all of your or your customer’s needs.
Related
I can see in Azure portal there is a nice UI to scale instances automatically.
Is there a way to change an app plan automatically?
For example, I may want to move from P1V2 to S1 during out of business hours, then scale back up again in the morning.
If there is no way to do it via the portal, I'm open to using APIs to change the app plans via a schedule functions or logic app if anyone can provide an example.
Any other suggestions are also welcome.
Thanks.
Is there a way to change an app plan automatically?
Not like there is a way to do so horizontally by using auto-scale. You can, however, accomplish this using Azure Automation.
Azure Automation delivers a cloud-based automation, operating system updates, and configuration service that supports consistent management across your Azure and non-Azure environments. It includes process automation, configuration management, update management, shared capabilities, and heterogeneous features.
Your scenario is explicitly mentioned under Common scenarios.
Azure resource lifecycle management - for IaaS and PaaS services.
Resource provisioning and deprovisioning.
Add correct tags, locks, NSGs, UDRs per business rules.
Resource group creation, deletion & update.
Start container group.
Register DNS record.
Encrypt Virtual machines.
Configure disk (disk snapshot, delete old snapshots).
Subscription management.
Start-stop resources to save cost.
Dev/test automation scenarios - Start and stop resources, scale resources, etc.
To set the App Service Plan, use Set-AzAppServicePlan from the Az.Websites module.
Failed to save Traffic Manager profile changes Failed to save configuration changes to Traffic Manager profile 'xxxx'. Error: Profiles in the 'Default-TrafficManager' resource group must be compatible with the Azure Service Management (ASM) API. They may not contain PublicIpAddress endpoints or endpoints in a different subscription than that of the profile. The endpoint 'xxxx' is not compatible.
When Traffic Manager is created using Resource Group named "Default-TrafficManager" it is considered ASM and trying to configure some features result in error message. You cannot create a Traffic Manager profile in a Resource Group named Default-TrafficManager with any ARM-only features. This is due to a hard-coded internal limitation that any ATM profile in a Resource Group named Default-TrafficManager must be compatible with the Azure Service Management (ASM) APIs.
To resolve this issue, you need to move your Azure Traffic manager to a new Resource Group that is NOT named "Default-TrafficManager".
Refer the following article on how to move your ATM to another resource group : https://learn.microsoft.com/en-us/azure/azure-resource-manager/management/move-resource-group-and-subscription#use-the-portal
It looks like you are using some "classic" ASM resources. Are your endpoints classic virtual machines or cloud services? I believe traffic manager does support these but all endpoints have to be in the same subscription. There may also be an issue with mixing ASM and ARM resources so the solution is probably to migrate your ASM resources to ARM.
https://learn.microsoft.com/en-us/azure/virtual-machines/migration-classic-resource-manager-overview
I have several App Services, and storage accounts set up in Azure. We have a Resource Group, which is a handy way to bundle together all the services and storage - for example, for tracking billing (other teams use the same subscription).
Now, I want to add a new Cloud Service, and have it included in the Resource Group. But then I see the Cloud Service listed at the same level as Resource Groups, which makes no sense.
Is it possible to include Cloud Services inside a Resource Groups, along with our App Services - and if not, what's the rationale?
Currently azure cloud services( web roles and worker roles) are not part of the Azure resource manager feature. Hence you cannot add a cloud service to a resource group. This is a requested feature in the azure feedback portal. You can go add your comments and cast your vote.
https://feedback.azure.com/forums/169386-cloud-services-web-and-worker-role/suggestions/7899432-add-cloud-services-as-an-available-resource-when-w
In Azure there are 2 options available to create virtual machines.
A. normal VM
B. Classic VM
Does anybody know what is the difference between both option? When do we use one over other?
Short answer to your question is Normal VM or Virtual Machines is the new way of deploying your Virtual Machines whereas Classic VM or Virtual Machines (Classic) is the old way of deploying them. Azure is pushing towards the new way of deploying resources so the recommendation would be to use it instead of old way. However please keep in mind that there're some features which are available in the old way that have not been ported on to the new way so you just have to compare the features offered and only if something that you need is not available in new way, you use the old way.
Now comes the long answer :)
Essentially there's a REST API using which you interact with Azure Infrastructure.
When Azure started out, this API was called Service Management API (SMAPI) which served its purpose quite well at that time (and to some extent today). However as Azure grew, so does the requirements of users and that's where SMAPI was found limiting. A good example is access control. In SMAPI, there was access control but it was more like all-or-none kind of access control. It lacked the granularity asked by users.
Instead of patching SMAPI to meet user's requirement, Azure team decided to rewrite the entire API which was much simpler, more robust and feature rich. This API is called Azure Resource Manager API (ARM). ARM has many features that are not there in SMAPI (my personal favorite is Role-based access control - RBAC).
If you have noticed that there are two Azure portals today - https://manage.windowsazure.com (old) and https://portal.azure.com (new). Old portal supports SMAPI whereas new portal supports ARM. In order to surface resources created via old portal into new portal (so that you can have a unified experience), Azure team ended up creating a resource provider for old stuff and their names will always end with (Classic) so you will see Virtual Machines (Classic), Storage Accounts (Classic) etc. So the resources you create in old portal can be seen in the new portal (provided the new portal supports them) but any resources you create in the new portal using ARM are not shown in the old portal.
The Azure Virtual Machine (classic) is based on the old Azure Service Management Model (ASM). Which revolved around the concept of a cloud service. Everything was contained inside a cloud service, and that was the gateway to the internet. While it is still used (extensively) Azure is now moving over to the Azure Resource Management Model (ARM).
ARM uses the concept of declarative templates to configure an entire solution (rather than individual components) So you can create an entire Sharepoint stack, rather than just a singular machine.
ARM also has a much more logical approach to networking. Instead of having a monolithic VM in an obscure cloud service. You have a VM, that you attach a network card to. You can then put the Network card into a VNet and attach a public IP (if you need one)
Unless you have a compelling reason to use ASM (classic) You should create your solution using ARM. As this is the MS recommendation going forward (todo find a link to that) It also means that you can create templates for your deployments, so you can have a repeatable solution.
On the negative, the old portal manage.windowsazure.com can not manage anything that is deployed using ARM, and there are still parts of ASM that haven't been migrated over to ARM yet. For instance you cannot configure Azure VM backup, since Azure backup is ASM and it can't 'see' ARM VMs
It very largely depends on your circumstances though, what it is you are planning for, the method you are going to deploy with. If you are just looking to stand a machine up to do a single task, it makes very little difference. If you are looking to deploy into an environment that will have some concepts of DevOps going forward, then ARM is the way to go.
The one big differences is for resource management. For that new version is called Azure Resource Manager VM (ARM VM).
ARM VM is better in terms of;
Classic VM must be tied with Cloud Service, and Cloud Service consumes resource limitation and not-so-flexible network configuration.
ARM VM is managed under Azure Resource Manager (ARM) which can be organized with/without other Azure services. ARM is like a folder of Azure services, and it gives you more fine-grained resource management.
Classic VM can be migrated to ARM VM version, but you have to afford service downtime. To migrate from classic VM, read the official article: Considerations for Virtual Machines.
Azure provides two deploy models now: Azure Resource Manager(Normal) and Azure Service Management(Classic) and some important considerations you should care when working Virtual Machines.
Virtual machines deployed with the classic deployment model cannot be included in a virtual network deployed with Resource Manager.
Virtual machines deployed with the Resource Manager deployment model must be included in a virtual network.
Virtual machines deployed with the classic deployment model don't have to be included in a virtual network.
I see some Microsoft Azure services are marked as (classic) in Azure Portal, such as OS images, VMs, and Storage account.
Does it mean they're planned to deprecated or what? Where to find the modern services correspond to them?
The new Azure Resource Manager (which uses a new API) spins up resources in a slightly different way than the old API's did. The classic API stack is still operational, but you'll see those resources show up in the new (Ibiza) portal as classic, including virtual machines, vm images, storage, OS disks, reserved IP addresses, and virtual networks (based on what I can see in the portal right now; I don't have insight into what will show up or be removed in the future).
Resource Manager: This is the newest deployment model for Azure resources. Most newer resources already support this deployment model and eventually all resources will.
Classic: This model is supported by most existing Azure resources today. New resources added to Azure will not support this model.
https://azure.microsoft.com/en-gb/documentation/articles/azure-classic-rm/