Azure Centric

0

General Methodology for Troubleshooting Hyper-V Replica

Hyper-V Replica connectivity issues between Primary and Replica servers Symptom:  Hyper-V Replica functionality is disrupted and the Hyper-V VMMS\Admin log reports general network connectivity errors between the Primary and Replica server Verify the Replica server is booted and running. Check network connectivity and name resolution functionality between the Primary and Replica server by executing ping and nslookup tests.  If ping test fails, resolve network connectivity issues.  If name resolution fails,...

0

VLANs with Hyper-V Network Virtualization

Isolating different departments’ virtual machines can be a challenge on a shared network. When entire networks of virtual machines must be isolated, the challenge becomes even greater. Traditionally, VLANs have been used to isolate networks, but VLANs are very complex to manage on a large scale. The following are the primary drawbacks of VLANs: · Cumbersome reconfiguration of production switches is required whenever virtual machines or isolation boundaries must be...

4

Hyper-V Failover Cluster as a Primary or Replica Server

Failover Clustering has proven its value in making virtualized workloads highly available.  We saw this in Windows Server 2008 using Quick Migration and then in Windows Server 2008 R2 with the addition of Live Migration. Failover Clustering can also play an important role as a Replica Cluster.  To accommodate this, a new role has been added in Failover Clustering called the Hyper-V Replica Broker.  A new resource type, Virtual Machine...

2

Enabling a Virtual Machine for Replication

Replication is configured on a per virtual machine basis.  Virtual machines running on Primary site Hyper-V servers (or Hyper-V Failover Clusters) are configured to replicate to Replica servers (or Replica Failover Clusters) at remote sites. 1.     In Hyper-V Manager, in the Details pane, Click on a virtual machine 2.     With a virtual machine selected, Right-click and choose Enable Replication.  This starts the Enable Replication wizard 3.     In the Specify Replica...

0

Configuring and Managing Hyper-V Replica

Management Considerations Hyper-V servers are managed locally using the Hyper-V Manager interface or remotely using the Hyper-V Remote Server Administration Tools (RSAT) or System Center Virtual Machine Manager (SCVMM).  If the configuration is a Hyper-V Failover Cluster, the Failover Cluster Management interface is used. Configuration and Management UI Hyper-V Replica settings are configured in the Hyper-V Manager interface for standalone Hyper-V servers and the Failover Cluster Manager interface for Hyper-V...

2

Installation Process of Hyper-V Replica

Hyper-V Replica is installed as part of the Hyper-V Role. Installation UI/Wizard To add the Hyper-V Role to a server installation, use the Add Role and Feature Wizard (ARFW), which is part of Server Manager or use the Deployment Image and Servicing Management (DISM) command line tool.  A reboot is required.  This can occur automatically if the installation is being executed in the Server Manager interface by checking a box...

0

Hyper-V Replica PowerShell CMDLETS

The following Hyper-V PowerShell cmdlets apply to Hyper-V Replica.   Cmdlet Complete-VMFailover Description This cmdlet completes the Failover process of the virtual machine. The virtual machine’s current recovery point is committed and all other recovery points are removed. Failover cannot be cancelled once the recovery points are removed. Verb-Noun Complete-VMFailover Syntax Complete-VMFailover [-VMName] <String> [-ComputerName <String[]>] [-PassThru] Example Complete-VMFailover -VMName C0-FIN-FS1   Cmdlet Get-VMNetworkAdapterFailoverConfiguration Description Retrieves the Failover IP settings on...

0

Dynamic Optimization on SCVMM 2012

SCVMM 2012 introduced the ability to constantly monitor and rebalance load on clusters by using “Dynamic Optimization”.  How Dynamic Optimization works, will help understand its behavior and get the most out of this feature. What does Dynamic Optimization do?  Simply put, it searches for live migrations within a Host Cluster that will improve the overall health of the cluster.  “Health” describes two main facets – Host load and VM configuration....

4

Multitenant security and isolation with Hyper 2012

Virtualized data centers are becoming more popular and practical every day. IT organizations and hosting providers have begun offering infrastructure as a service (IaaS), which provides more flexible, virtualized infrastructures to customers—“server instances on‑demand.” Because of this trend, IT organizations and hosting providers must offer customers enhanced security and isolation from one another. If you’re hosting two companies, you must help ensure that each company is provided its own privacy...

0

Hyper-V Replica Communications Architecture

Hyper-V Replica Communications Architecture The Hyper-V Replica communications architecture is implemented at the Hyper-V Replica Network transport layer.  This layer provides a bi-directional transport channel based on the HTTP Client-Server model to send virtual machine replicas and control messages between Primary and Replica servers.  Replica Network Services is responsible for authorizing access to a Replica server and mutually authenticating the Primary and Replica servers.  It also provides the ability to...