STO1297BE Stretched Clusters or VMware Site Recovery Manager? We Say Both! Jeff Hunter, VMware, @jhuntervmware GS Khalsa, VMware, @gurusimran #VMworld
Disclaimer This presentation may contain product features that are currently under development. This overview of new technology represents no commitment from VMware to deliver these features in any generally available product. Features are subject to change, and must not be included in contracts, purchase orders, or sales agreements of any kind. Technical feasibility and market demand will affect final delivery. Pricing and packaging for any new technologies or features discussed or presented have not been determined. CONFIDENTIAL 2
What are VMware Metro Storage Clusters - vmsc vcenter Site A (Active) Live Migration HA Restart Stretched vsphere Cluster VMworld 2017 Content: Not for < 100 KM distance Site B (Active) Applications are protected against localized site failures Proactive live migrations of applications for continuous availability publication Automated recovery of workloads after host failures Single Management console for all workloads Stretched Storage 6
What you need for an Active-Active datacenter model Stretched Storage solution Stretched L2 Network Storage clustering solution that supports distributed data mirroring Read/write access to the same volumes from both sites Some tie-break mechanism to avoid split-brain Examples: VMware vsan, EMC VPLEX, IBM SVC, NetApp MetroCluster VMworld 2017 Stretched Volumes Stretched Volumes Across Sites Storage Controllers Backend Arrays Site 1 Storage Controllers Content: Not for publication Backend Arrays Site 2
Keep in mind HA DRS SDRS Maintenance/Management Cost Complexity 10
VMware HCI addresses typical challenges of Stretched Clusters Typical Stretched Cluster Storage and Replication Management vsphere COMPUTE STORAGE STORAGE COMPUTE vsphere COMPUTE + SERVER- ATTACHED STORAGE vsan Stretched Cluster vsan COMPUTE + SERVER- ATTACHED STORAGE Complex configuration and management Expensive to deploy and operate Creates silos of specialized hardware Simplifies management: policy-based, app-level Lowers TCO: server economics Eliminates Silos: your choice of hardware 11
Today vsan stretched cluster spans two sites vsphere 3 rd site for witness VMworld 2017 Content: Not for vsan Standard x86 hardware Up to 15 hosts per site 10Gbps recommended publication L2 recommended L3 supported 5ms or less RTT required No multicast in vsan 6.6.x Automated failover using HA CONFIDENTIAL 12
vsan stretched cluster witness host deployed at third site vsphere vesxi VM Witness Host 5ms RTT, 10GbE 3 rd site for witness vsan ESXi virtual appliance Deployed from OVA Stores metadata only Third site latency requirements 1-10 hosts/site <200ms RTT 11-15 hosts/site <100ms RTT 100Mbps, L3 to main sites CONFIDENTIAL 13
Demo Configuring a vsan Stretched Cluster is easy CONFIDENTIAL 14
Stretched cluster component placement VM VMDK Witness Tertiary Site Cache Cache Capacity Capacity Capacity Preferred Site Capacity Capacity Capacity Secondary Site CONFIDENTIAL 15
Stretched cluster local failure protection Redundancy against host failure and site failure If site fails, vsan maintains local redundancy in surviving site No change in stretched cluster configuration steps Minimized I/O traffic across sites Local reads, local resyncs Single inter-site writes New in vsan 6.6 CONFIDENTIAL 16
Stretched Cluster Local Failure Protection RAID-5 VM VMDK Witness Tertiary Site New in vsan 6.6 Preferred Site Secondary Site CONFIDENTIAL 17
Stretched Cluster Local Failure Protection RAID-5 New in vsan 6.6 CONFIDENTIAL 18
Stretched Cluster Local Failure Protection RAID-1 VM VMDK Witness Tertiary Site New in vsan 6.6 Preferred Site Secondary Site CONFIDENTIAL 19
Stretched Cluster Local Failure Protection RAID-1 New in vsan 6.6 CONFIDENTIAL 20
vsan stretched cluster Witness Tertiary Site VM VM VM VM VM VM VM VM Preferred Site Secondary Site CONFIDENTIAL 21
Network partition or site failure X VM VM VM VM X VMworld 2017 Witness Tertiary Site Content: Not for publication X VM VM VM VM Preferred Site Secondary Site CONFIDENTIAL 22
vsphere HA restarts VMs at the other site X X Witness Tertiary Site X VM VM VM VM VM VM VM VM HA Restart Preferred Site Secondary Site CONFIDENTIAL 23
vsan stretched cluster Witness Tertiary Site VM VM VM VM VM VM VM VM Preferred Site Secondary Site CONFIDENTIAL 24
Inter-site network disconnected Witness Tertiary Site VM VM VM VM VM VM VM VM X Preferred Site Secondary Site CONFIDENTIAL 25
vsphere HA powers off VMs at Secondary Site Witness Tertiary Site VM VM VM VM VM VM VM VM X HA Power Off Preferred Site Secondary Site CONFIDENTIAL 26
vsphere HA restarts VMs at Preferred Site HA Restart VM VM VM VM VM VM VM VM Witness Tertiary Site X Preferred Site Secondary Site CONFIDENTIAL 27
vsan stretched cluster Witness Tertiary Site VM VM VM VM VM VM VM VM Preferred Site Secondary Site CONFIDENTIAL 28
Witness host network disconnected X Witness Tertiary Site VM VM VM VM VM VM VM VM Preferred Site Secondary Site CONFIDENTIAL 29
Witness host leaves cluster, VMs continue to run X Witness Tertiary Site Witness host leaves cluster VM VM VM VM VM VM VM VM Preferred Site Secondary Site CONFIDENTIAL 30
Witness host is offline, VMs continue to run X Witness Tertiary Site VM VM VM VM VM VM VM VM Preferred Site Secondary Site CONFIDENTIAL 31
Changing the witness host is easy New in vsan 6.6 CONFIDENTIAL 32
vsan stretched cluster Easy and less expensive to deploy Lowers complexity with standard x86 server hardware Provides local and cross-site availability However Main data sites must be located no more than 5ms apart Large disasters, power grid failure, etc. can take both sites offline Stretched clusters require a disaster recovery solution CONFIDENTIAL 33
What is Site Recovery Manager? Production Site vcenter Server vsphere Servers Site Recovery Manager vsphere Replication Array-based replication Recovery Site vcenter Server vsphere Servers Site Recovery Manager Centralized recovery plans for 1000 s of VMs Non-disruptive recovery testing Automated DR workflows Integrated with the VMware product stack Eliminates complexity and risk of manual processes Enables fast and highly predictable RTOs Provides policy-driven DR control for any virtualized app
Transforms Management of Recovery And Migration Plans From Complex Runbooks Weeks or months to set up recovery plans Unstructured and manual makes them error-prone Quickly fall out of sync with infrastructure changes VMworld 2017 to Simple Recovery Plans Simple set up in minutes Software-defined workflows eliminate errors Content: Not for publication Simple to update and keep in sync with changes
SRM Demo CONFIDENTIAL 37
What is vsphere Replication? Per-VM, host-based replication Network-efficient by replicating only changed data Included with vsphere Essentials Plus and higher editions Data App OS Data App OS vcenter Server Only changes are replicated vsphere Replication Data App OS Data App OS SAN vsan 38
vsphere Replication Features and Benefits Easy virtual appliance deployment Minimal time investment, no hardware procurement Integration with vsphere Web Client Ease of administration and monitoring Protect any VM regardless of OS and apps One solution reduces complexity and cost Data App OS 39
vsphere Replication Features and Benefits Flexible recovery point objective (RPO) policies 5 mins to 24 hours Supports a wide variety of business requirements Compatible with vsan, SAN, NAS, local storage One solution reduces complexity and cost Quick recovery for individual VMs Reduces downtime, minimizes resource requirements 40
vsphere Replication Features and Benefits End-to-end network compression Further reduces bandwidth requirements Network traffic isolation Control bandwidth, improve performance, security Windows VSS and Linux file system quiescing Increased reliability when recovering VMs Management Replication LAN WAN 41
SRM or vmsc? What are the Benefits and Challenges? CONFIDENTIAL 44
Challenges with vmsc No Orchestration No non-disruptive testability DRS and HA are not site aware Availability of a single vcenter managing both sites with SRM No option for moving VMs without downtime Requires multiple vcenters Previously, no integration with stretched clusters 45
Benefits with vmsc Requires a single vcenter Zero downtime disaster avoidance No need to change IP addresses Zero RPO with potential RTO of minutes with SRM Orchestrated Recovery Non-disruptive Testing No requirement for stretched L2 46
SRM + Stretched Storage vcenter Sita A vsphere Site Recovery Manager Stretched Storage vcenter Site B vsphere Site Recovery Manager The best of both Stretched storage with SRM Orchestrate cross-vc vmotion Unified plan for DR, migrations Zero-downtime migrations for planned maintenance, disaster avoidance Ability to non-disruptively test Enhanced reliability Lower RTO
SRM integration with Active-Active storage solutions
active-active datacenters with SRM vcenter SRM Site 1 vsphere cluster ESXi ESXi ESXi Stretched Networks vcenter Site 2 vsphere cluster SRM ESXi ESXi ESXi Volume A at Site 1 (Full R/W access) Stretched Storage Volume A at Site 2 (Full R/W access)
scenario 1: local host failures in one site vcenter SRM Site 1 vsphere cluster ESXi ESXi ESXi VMworld 2017 Stretched Networks HA handles local host failures vcenter Site 2 vsphere cluster SRM ESXi ESXi ESXi Content: Not for publication Volume A at Site 1 (Full R/W access) Stretched Storage Volume A at Site 2 (Full R/W access)
scenario 2: disaster avoidance at one site vcenter SRM Site 1 vsphere cluster ESXi ESXi ESXi Volume A at Site 1 (Full R/W access) SRM Execute invokes SRM vmotion Planned as per VM Migration priority with and vmotion dependencies BEFORE in Recovery disaster Plan Stretched Networks Stretched Storage SRM gives you the easy button for handling planned downtime in Active-Active datacenters vcenter Site 2 vsphere cluster ESXi ESXi ESXi Volume A at Site 2 (Full R/W access) SRM
scenario 3: faster recovery from unplanned failures vcenter SRM Site 1 vsphere cluster ESXi ESXi ESXi Volume A at Site 1 (Full R/W access) In a site failure scenario, Use SRM s test capability execute SRM Recovery vcenter to Plan prepare for site-wide at other Active site. failures Can be automatically triggered Stretched by an Networks external system VMworld 2017 Content: Not for Stretched Storage Site 2 vsphere cluster ESXi ESXi ESXi Volume A at Site 2 (Full R/W access) SRM enables a reliable, testable and low RTO solution for handling unplanned failures in Active-Active datacenters SRM publication
Stretched Storage Planned Migration 55
vmotion in Stretched Storage Recovery Plan 56
Stretched Storage in DR Mode 57
Stretched Storage in DR Mode 58
High availability with stretched cluster, automated DR with SRM VC VR SRM VM VM VM VM VM vsan Preferred Site vsan Stretched Cluster VC VR SRM WH vsan Secondary Site vsan Tertiary Site Site Recovery Manager
Demo vsan Stretched Cluster and SRM 61
Questions 64