Mike Resseler - Using hyper-v replica in your environment

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Information about Mike Resseler - Using hyper-v replica in your environment

Published on February 4, 2014

Author: nicconf

Source: slideshare.net

Mike Resseler Using Hyper-V replica in your environment. A new defense layer in your Disaster Recovery Plan… EMEA Microsoft Evangelist Veeam Software @MikeResseler




Overview Inbox Replication DR Scenarios Application Agnostic Storage Agnostic

Relevance of Hyper-V Replica Hyper-V & Failover Clustering: Site A Hyper-V Replica: Availability across datacenter Site B

Flexible Deployment Replication between two data centers Replication between SMB to hoster

New in Hyper-V 2012 R2 Extended Replication!

Asynchronous Replication

Replication Resiliency Resiliency from Failures Retry and resume semantics Resynchronization Seamless handling of VM Mobility No admin intervention required Live Migration, Storage Migration and Quick Migration Within cluster and across cluster

Linux Support! • File-System Consistent snapshots • IP address injection

Demo: Setting up Replica on a host

Firewall Rule

PowerShell Set-VMReplicationServer -ReplicationEnabled $true -AllowedAuthenticationType Integrated IntegratedAuthenticationPort 80 DefaultStorageLocation “D:Example” ReplicationAllowedFromAnyServer $true

Demo: Replicating our first VM

PowerShell $ReplicaServer = “HyperV02.md.local” $RecoveryPort = 80 $PrimaryVM1 = “TestVM” $PrimaryServer = “HyperV01.md.local” Set-VMReplication -VMName $PrimaryVM1 ReplicaServerName $ReplicaServer -ReplicaServerPort $RecoveryPort -AuthenticationType Integrated CompressionEnabled $true -RecoveryHistory 0 Start-VMInitialReplication –VMName $PrimaryVM1

VM Mobility Site A Site B Pre-requisites: Primary migration: All primary servers must be authorized Replica migration: Requires Hyper-V Replica Broker

DR Scenarios

Planned Failover • Testing DR or site maintenance or impending disaster • Zero data loss but some downtime • Efficient reverse replication Site A Site B 1. 2. 3. 4. Shutdown primary VM Send last log Failover Replica VM Reverse replicate

Planned FailOver • • • • • • • Started on Primary VM, ended on Replica VM No duplicate VM is created Timeframe: depends on you Recommed frequency: 6 months Replication: Continues, reversed mode Data Loss: No Down Time: Yes (Planned)

Demo: Planned Failover

Test Failover Non-disruptive testing of workload – zero downtime Test any recovery point Pre-configure isolated network Site A Site B

Test Failover Demo Setup

Test FailOver • • • • • • • Started Replica VM Duplicate VM is created Timeframe: Short Recommed frequency: once a month Replication: Continues Data Loss: No Down Time: No

Demo: Test Failover

Failover • When there is an issue • Replica uses Remote WMI to test if primary is still running (to prevent split-brain) • Previous PIT if recovery history is used • If failover is OK, do a complete to merge

FailOver • • • • • • • Started Replica VM No duplicate VM is created Timeframe: depends Recommed frequency: never Replication: Stopped Data Loss: Possible Down Time: Yes

Demo: Failover

Network Configuration on Replica Server Name IP Address SQLVM 10.22.100.XX

Demo: Alternate Network Config

Deployment Considerations

Avg. Replication Latency (mins) Network Capacity 15 10 5 0 1 2 3 4 5 6 Uncompressed data transferred in 24 hrs 7

Network Throttling – Use Windows Server 2012 QoS to throttle replication traffic – Throttling based on the destination subnet – Throttling based on the destination port - Throttling based on Application Name

Network Utilization • Replicating multiple VMs in parallel – Higher concurrency leads to resource contention and latency – Lower concurrency leads to underutilizing • Manage initial replication through scheduling • Manage delta replication Network bandwidth Ideal number of parallel transfers 1.5 Mbps, 100ms, 1% packet loss 3 (Default) 300 Mbps, 10ms, 1% packet loss 10

Backup Interoperability • Backup copy to seed Initial Replication • Back-up Primary VM – Concurrent backup and replication are handled seamlessly – Restore of Primary VM requires resync • Back-up Replica VM – Replica VM turned off – Backup is on hold when VHD is modified by replication – Restore of replica VM requires resync

Server Impact • Impact on primary server – Storage space: Proportional to writes in the VM – Storage IOPS on ~ 1.5 times write IOPS • Impact on replica server – Storage space: Proportional to the write-churn • Each additional recovery point ~10% of the base VHD size – Storage IOPS: • • Memory ~50MB per replicating VHD CPU impact <3%

PowerShell • Use PowerShell to manage and automate your replica’s • Get-command –Module Hyper-V | where {$_.Name –like “*replication*”} • Get-command –Module Hyper-V | where {$_.Name – like “*failover*”}

Demo: Monitoring & PowerShell

Tips • • • • • • Use bandwidth control! Firewall! Cluster: Replica Broker role Traffic encrypted or not? Which vhd(x)? Watch for resynchronization!

Capacity Planner • http://www.microsoft.com/enus/download/details.aspx?id=39057 • Only works on Windows Server 2012… not R2

Out-of-Band IR • Create Replica on Primary Site • Choose “Send initial copy using external media” • Move over data • Import initial replica

Out-of-Band IR - PowerShell • Enable-VMReplication –VMName TestVM – ReplicaServerName HyperV02.md.local – ReplicaServerPort 80 –AuthenticationType Kerberos • Start-VMInitialReplication –VMName TestVM – DestinationPath F:VirtualMachineData • Import-VMInitialReplication –VMName TestVM Path D:VirtualMachineData TestVM_A60B7520724D-4708-8C09-56F6438930D9

Out-of-Band Demo

Saving Disk Space • Use Dynamic disks at the Replica Side – Enable replication from the customer to the hosting provider using online IR or out-of-band IR. – The hosting provider waits for the IR to complete. – The hosting provider can then pause the replication at any time on the Replica server – this will prevent HRL log apply on the disk while it is being converted. – The hosting provider can then convert the disk from fixed to dynamic using the Edit Disk and Convert option – The hosting provider then replaces the fixed disk with the dynamic disk at the same path and with the same name. – The hosting provider resumes replication on the Replica site. • Convert-VHD –Path c:FixedDisk.vhdx –DestinationPath f:FixedDisk.vhdx – VHDType Dynamic

Online Resize supported? • • • • No need for resync No need to delete and reenable But you need to do it on both sides manually However: Failover older recovery points…

Upgrading to R2 • First Upgrade Replica Servers • Or migrate to new 2012 R2 server • Then your primary server

Deduplication on Replica server • Without recovery points… No problem • With recovery points: – Slower… 5 to 7 times… – 15 seconds can be a problem… 5 minutes maybe… • Solution: – Defragment volume (once every 3 days at least) – Increase the dedup policy to 1 day instead of 3

Best Practices Analyzer

Best Practices Analyzer 37 A Replica server must be configured to accept replication requests 38 Replica servers should be configured to identify specific primary servers authorized to send replication traffic 39 Compression is recommended for replication traffic 40 Configure guest operating systems for VSS-based backups to enable application-consistent snapshots for Hyper-V Replica 41 Integration services must be installed before primary or Replica virtual machines can use an alternate IP address after a failover 42 Authorization entries should have distinct tags for primary servers with virtual machines that are not part of the same security group. 43 To participate in replication, servers in failover clusters must have a Hyper-V Replica Broker configured 44 Certificate-based authentication is recommended for replication. 45 Virtual hard disks with paging files should be excluded from replication 46 Configure a policy to throttle the replication traffic on the network 47 Configure the Failover TCP/IP settings that you want the Replica virtual machine to use in the event of a failover 48 Resynchronization of replication should be scheduled for off-peak hours 49 Certificate-based authentication is configured, but the specified certificate is not installed on the Replica server or failover cluster nodes 50 Replication is paused for one or more virtual machines on this server 51 Test failover should be attempted after initial replication is complete 52 Test failovers should be carried out at least monthly to verify that failover will succeed and that virtual machine workloads will operate as expected after failover 53 VHDX-format virtual hard disks are recommended for virtual machines that have recovery history enabled in replication settings 54 Recovery snapshots should be removed after failover

PowerShell • Invoke-BpaModel -ModelId Microsoft/Windows/Hyper-V • Get-BpaResult -ModelId Microsoft/Windows/Hyper-V • Get-BpaResult -ModelId Microsoft/Windows/Hyper-V Filter Noncompliant

Hyper-V Recovery Manager

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