Category: High Availability

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Adding an IP to an existing Azure Virtual Network Gateway

So, you have a Virtual Network Gateway deployed in Azure and it’s working just fine, although you would like to add another public IP to an existing Azure Virtual Network Gateway to be used as an Active/Active BGP scenario. The question is: Can I update the IP configuration for the existing gateway or do I have to remove/rebuild the gateway to add the new public IP? The answer is: You...

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Azure Availability Zones and Zone-Redundant Storage hits GA

Very exciting news come this week! Microsoft announces the General Availability for Azure Availability Zones and Zone Redundant Storage. This is really good, because now you can to run highly-available, mission-critical workloads on top of zone-redundant VM/Scale Sets, Load Balancers, and Storage. Several additional regions and services such as Azure SQL and Redis Cache are also available to customers in preview or in the works. For now, only Central-US and...

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Load Balanced and Availability Set with multiple VMs

When it comes to best practices to how to setup multiple virtual machines using a load balanced and availability set, the information out there is either outdated or hard to find. What is the scenario? Imagine that you need to set a few VMs that need to be shared the configuration and some files between them. How you could do it? After a few searches on the web, I come...

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Managed disk on Azure

You probably already saw this when you are creating a Virtual Machine on Azure. After you insert the basic information like Name of the VM, choose the size, then comes the time to define and configure the settings of that VM. One of the first thing is the Use of managed disk. But what is managed disks? How they work? What are the implication of using the Managed disks? So,...

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How to extend Azure Service Fabric to on-premise?

You can deploy a Service Fabric cluster on any physical or virtual machine running the Windows Server operating system, including ones residing in your on-premises datacenters. You use the standalone Windows Server package available for download from the Azure online documentation website (see here). To deploy an on-premises Service Fabric cluster, perform the following steps: Plan for your cluster infrastructure. You must consider the resiliency of the hardware and network...

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Virtual Machine Scalability in Azure – Part 1

You can provide automatic scalability for Azure VMs by using Azure VM scale sets. A VM scale set consists of a group of automatically provisioned Windows or Linux virtual machines that share identical configuration and deliver the same functionality to support a service or application. With a VM scale set, the number of virtual machines can increase or decrease, adjusting dynamically to changes in demand for its workload. The workload...

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Virtual Machines High Availability on Azure

In general, you want your Azure virtual machine environment to be resilient to hardware failures and maintenance events that might occur occasionally within the Azure infrastructure. The primary mechanism provided by the Azure platform that helps you accomplish this objective is the availability set feature. Availability sets are designed to gracefully handle two types of ebent that might result in downtime of individual Azure virtual machines. Planned outages. These outages...

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Cluster Shared Volumes (CSV) errors on Hyper-V Cluster

In a failover cluster, virtual machines can use Cluster Shared Volumes that are on the same LUN (disk), while still being able to fail over (or move from node to node) independently of one another. Virtual machines can use a Cluster Shared Volume only when communication between the cluster nodes and the volume is functioning correctly, including network connectivity, access, drivers, and other factors. You probably didn’t notice any issues...