Business Continuity. Business Continuity (1) Business Continuty (2) Seminario Virtualizzazione /05/2010. Assyrus Srl 1.

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1 Business Continuity Introduzione Business Continuity (1) Definizione Capacità di un azienda di continuare ad esercitare il proprio business a fronte di eventi catastrofici che possono colpirla Pianificata secondo il Ciclo di Deming (PDCA) P (Plan) Programmazione D (Do) Esecuzione del programma, dapprima in contesti circoscritti C (Check) Test e controllo, studio e raccolta dei risultati e dei feedback A (Act) Azione per rendere definitivo e/o migliorare il processo Business Continuity Plan (BCP) processo globale, con aspetti più economici che tecnici 28/05/2010 Seminario Virtualizzazione Business Continuty (2) Data Protection Backup? System Protection Backup? System disaster recovery? Service Protection Alta disponibilità? Continuità di servizio? Site Protection Site disaster recovery? 28/05/2010 Seminario Virtualizzazione Assyrus Srl 1

2 Business Continuity Plan (BCP) Piano logistico Analisi del rischio Definizione dei processi mission critical Procedure di continuità Standard di riferimento BS Dicembre British Standards Institute 28/05/2010 Seminario Virtualizzazione Business Continuity Alta disponibilità Livello di disponibilità Livello di disponibilità misurato con un certo numero di 9 AL1: 99% corrisponde a 3.65 giorni/anno di fermo AL2: 99,9% corrisponde a 8h e 45 di fermo AL3: 99,99% corrisponde a 52,5 di fermo AL4: 99,999% (cinque 9) = 5,25 di fermo Considerando la notte, le festività, le vacanze.. Usato spesso per definire gli SLA (Service Level Agreement) 28/05/2010 Seminario Virtualizzazione Assyrus Srl 2

3 The Application Availability Pyramid AL4: Continuous Availability - System Fault Tolerance No user interruption % Availability 5.25 minutes AL3: High Availability Traditional Clustering User interruption 99.99% minutes AL2: Recovery - Data Replication & Back Up User interruption 99.9% hours AL1: Reliability Hot swappable components All service stops 99% hours AL0: Unprotected Servers All service stops 28/05/2010 Seminario Virtualizzazione Typical use cases Building Security/Access Control, Process Control , CRM, Database, Financial Systems Critical File Servers, DNS, Webservers Non critical systems, test and development, network server applications 28/05/2010 Seminario Virtualizzazione Traditional Availability Products Stratus FTserver, VMware FT, everrun FT, everrun VM Level 3 Microsoft Cluster, Veritas Cluster Server, SteelEye LifeKeeper HA, everrun HA / everrun VM VMware HA, Citrix XenServer HA, Neverfail Heartbeat, DoubleTake, EMC Replistor / EMC Autostart, Veritas Volume Replicator, CA XOsoft WANSync No HA Requirement 28/05/2010 Seminario Virtualizzazione Assyrus Srl 3

4 Virtualizzazione e disponibilità Si usano le normali regole per sistemi fisici Ridondanza Cluster VMware Cluster Raggruppamento di host ESX Funzioni del cluster DRS HA Richiede storage condiviso 28/05/2010 Seminario Virtualizzazione VM Migration Possibilità di spostare una VM da un host ad un altro Tipi di migration Cold Migration Power off VM on host A, power on on host B Hot Migration Suspend running VM on host A, resume on host B Migration with VMotion Form of Hot Migration Migrate running VM from host A to host B 28/05/2010 Seminario Virtualizzazione VMware VMotion VMotion lets you move live, running VM s from one ESX Host to another while maintaining continuous and application service availability Optimize Utilization 24/7 HW Maintenance Better Availability Uses shared storage Needs similar CPUs Utilizzato dal 73% dei clienti di VMware VI 28/05/2010 Seminario Virtualizzazione Assyrus Srl 4

5 VMware HA Identificazione di un server fisico non funzionante Migrazione automatica delle macchine virtuali Nessuna necessità di hardware dedicato in modalità stand-by X Cluster HA Strumento semplice per garantire l alta disponibilità 28/05/2010 Seminario Virtualizzazione VM Monitoring NEW! Enable automatic restart due to failure of guest operating system Determine how quickly failures are detected Set monitoring sensitivity for individual virtual machines 28/05/2010 Seminario Virtualizzazione VMware Fault Tolerance NEW! Single identical VMs running in lockstep on separate hosts APP APP APP Zero downtime, zero data loss failover for all virtual machines in case of hardware failures VMware vsphere Zero downtime, zero data loss No complex clustering or specialized hardware required Single common mechanism for all applications and -es 28/05/2010 Seminario Virtualizzazione Assyrus Srl 5

6 How FT Works Primary Virtual Machine Secondary Virtual Machine VMkernel VMM VMM VMkernel Log Update? Log Buffer Record Logs Heartbeat? Log Read? Log Buffer Read/Write Read Single Copy of Disks on Shared Storage 28/05/2010 Seminario Virtualizzazione Enable FT with a Single Click Primary Virtual Machine > Summary Tab After you turn on Fault Tolerance, the Status tab on the primary virtual machine shows Fault Tolerance information. 28/05/2010 Seminario Virtualizzazione Limiti di VMware FT VMware Fault Tolerance doesn t require any specialized hardware, but requires at a minimum series of processors Intel 31xx, 33xx, 52xx, 54xx, 74xx AMD 13xx, 23xx, 83xx and works with any future generation of these processors Come conoscere la compatibilità dei proprio sistema? 28/05/2010 Seminario Virtualizzazione Assyrus Srl 6

7 VMware FT and HA Work Together X X VMware FT X VMware HA VMware FT VMware FT VMware HA protects all nodes of the cluster Mission-critical VMs are protected by FT, remaining VM s protected by HA When a host fails: FT secondary takes over New FT secondary is started by HA HA-only VM s are restarted 28/05/2010 Seminario Virtualizzazione Availability Service Levels Hardware Failure Tolerance Continuous Automated Restart Unprotected VMware FT with VMware HA 0% 10% 100% Application Coverage 28/05/2010 Seminario Virtualizzazione VMware Solutions Maximize Uptime Planned Downtime Unplanned Downtime Virtual Machines APP APP APP APP APP Server ESX VMotion VM Failure Monitoring Site Recovery Manager HA Storage Storage VMotion VCB Interconnect Network Redundancy NIC & HBA Teaming 28/05/2010 Seminario Virtualizzazione Assyrus Srl 7

8 Cluster a livello di SO 28/05/2010 Seminario Virtualizzazione HA, FT and MSCS Clustering Level of availability Amount of downtime Guest operating systems supported ESX hardware supported Uses VMware HA FT MSCS Clustering High availability Fault tolerance Fault tolerance Minimal Zero Zero Works with all supported guest operating systems Works with all supported ESX hardware Use to provide high availability for all your virtual machines. Works with all supported guest operating systems Limited to the newest ESX hardware Use to provide fault tolerance to your critical virtual machines. Works with Windows operating systems Limited to hardware supported by Microsoft Use if you already have in-house expertise with MSCS. 28/05/2010 Seminario Virtualizzazione Singolo host Redundancy Support for redundant network and storage connections Easily system redundancy using virtual machines 28/05/2010 Seminario Virtualizzazione Assyrus Srl 8

9 Business Continuity Site disaster recovery Disaster Recovery Vari prodotti VMware SRM Vizioncore, PlateSpin, Double Take Approcci diversi Livelli diversi Disaster Recovery non sempre vuol dire Site Disaster Recovery La distanza può contare Altre soluzioni Soluzioni tradizionali Soluzioni custom 28/05/2010 Seminario Virtualizzazione VMware for Disaster Recovery Cost and complexity Traditional Disaster Recovery Solutions Simplified Backup & Recovery Hardware-independent recovery Non-disruptive backup Practical Disaster Recovery VMware vsphere Storage and serverbased replication Automated Disaster Recovery VMware Infrastructure + Site Recovery Manager Storage replication VMware enables rapid, reliable, and affordable solutions for a broad spectrum of disaster recovery needs 28/05/2010 Seminario Virtualizzazione Assyrus Srl 9

10 Disaster Recovery for SMB Easier, more reliable backup Simplified full-image backup Hardware-independent restore Lower obstacles to moving to better disaster recovery solutions Lower cost to build out recovery site Eliminate complexity of duplicating data center 28/05/2010 Seminario Virtualizzazione Remote and Branch Office Distributed Virtualization (Virtualized servers and desktops run at the remote office, remotely managed from data center) VMware Infrastructure delivers hardware-independent recovery from remote office to central datacenter Centralized Virtualization (Remote offices access virtual machines running in the central data center) Central datacenter protected by VMware Infrastructure + Site Recovery Manager 28/05/2010 Seminario Virtualizzazione Site Disaster Recovery Primary Data Center Disaster Recovery Site HP Servers Production Environment: 400+ VMs on 68 Physical ESX Servers Back-Up/DR Environment: 400+ VMs on 50 Physical ESX Servers Dell Servers Reduced recovery time from >20 hours to <20 minutes 28/05/2010 Seminario Virtualizzazione Assyrus Srl 10

11 Disaster Recover semplice Backup Server Primary Server Tape Array Recovery Target Recover to any hardware Recover exact virtual machine at recovery site Leverage existing backup and recovery tools 28/05/2010 Seminario Virtualizzazione VMware Site Recovery Manager Protected XSite Site Recovery VirtualCenter Manager VirtualCenter Recovery Site Site Recovery Manager Array Replication Datastore Groups Datastore Groups 28/05/2010 Seminario Virtualizzazione VMware and Business Continuity Resiliency Data Protection Failover Automated Failover NIC Teaming, Multipathing VMware High Availability, Fault Tolerance, DRS Maintenance Mode, VMotion Local availability Storage VMotion, VCB / VADP, Data Recovery Site Recovery Manager Remote recovery 28/05/2010 Seminario Virtualizzazione Assyrus Srl 11