VMware vsphere HA Recommendations to Maximize Virtual Machine Uptime

Transcription

1 INF-BCO2382 VMware vsphere HA Recommendations to Maximize Virtual Machine Uptime Josh Gray, VMware, Inc. Jeff Hunter, VMware, Inc. #vmworldinf

2 Disclaimer This session may contain product features that are currently under development. This session/overview of the 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. 2

3 High Availability is Part of IT Business Continuity 3

4 Just a Few Clicks to Higher Availability Turn ON vsphere HA OK 4

5 Global Support Services (GSS) Burlington, Canada Cork, Ireland Palo Alto, CA Broomfield, CO Tokyo, Japan Bangalore, India Support offices Local language support Spanish, Portuguese, French, German, Japanese, Chinese Global Coverage 24x7, 365 days/year 6 Support Centers Support Engineers Follow-the-sun Support for Severity 1 Issues Support Relationships with 100% of the Fortune 100; 99% of Fortune 500 5

6 6 Recent Enhancements

7 vsphere 5.0 Major Redesign Fault Domain Manager (FDM) 7

8 8 vsphere 5.1 Minor Updates

9 Recommendations: Networking Redundant Management Network Fewest hops possible Route based on originating port ID Failback policy = No Enable PortFast, Edge, etc. MTU size the same Keep things simple 9

10 Recommendations: Networking Consistent portgroup names, network labels Host Monitoring during network maintenance Use Maintenance Mode Separate subnet for vsphere HA Specify additional network isolation address Each host can communicate with all other hosts Keep things simple 10

11 Recommendations: Networking 11

12 Recommendations: Networking Advanced Configuration Options das.allownetwork[0-9]= das.isolationaddress[0-9]= das.usedefaultisolationaddress= (true/false) das.failuredetectiontime Not supported in vcenter 5.x 12

13 Recommendations: Storage Implement multiple paths HBAs, storage processors (SPs), NICs, switches Appropriate multipathing policy 13

14 Recommendations: Storage Storage Heartbeats HA selects two datastores by default 14

15 Recommendations: Storage Storage Heartbeats Override auto-selected datastores if necessary 15

16 HA Events (How to Avoid Problems) 16

17 Possible HA Events: Host Failure Network partition Host isolation 17

18 HA Events: Host Failures 18

19 HA Events: Network Partition 19

20 Recommendations: Network Partition Symptoms: Network Partition 20

21 Recommendations: Network Partition Symptoms: Network Partition Master 21

22 Recommendations: Network Partition Symptoms: Network Partition 22

23 Recommendations: Network Partition Symptoms: Network Partition New Master 23

24 Recommendations: Network Partition Symptoms: Network Partition New Master New Master 24

25 HA Events: Host Isolation 25

26 Host Isolation Policies: Leave Powered On Power Off Shutdown 26

27 Which Policy? (How to Avoid Problems) 27

28 Depends. (on HOW You Want to Avoid Problems) 28

29 29 Likelihood.

30 Recommendations: Isolation Response Host will retain access to datastores? VMs will retain access to VM network? Recommended Isolation Policy Rationale Likely Likely Leave Powered On VM is running fine, why power it off Likely Unlikely Leave Powered On or Shutdown Unlikely Likely Power off Allow HA to restart on hosts that are not isolated, likely to have access to storage Avoid having two instances of the same VM on the network 30

31 Recommendations: Isolation Response Host will retain access to datastores? VMs will retain access to VM network? Recommended Isolation Policy Rationale Likely Likely Leave Powered On VM is running fine, why power it off Likely Unlikely Leave Powered On or Shutdown Unlikely Likely Power off Allow HA to restart on hosts that are not isolated, likely to have access to storage Avoid having two instances of the same VM on the network 31

32 Recommendations: Isolation Response Host will retain access to datastores? VMs will retain access to VM network? Recommended Isolation Policy Rationale Likely Likely Leave Powered On VM is running fine, why power it off Likely Unlikely Leave Powered On or Shutdown Unlikely Likely Power off Allow HA to restart on hosts that are not isolated, likely to have access to storage Avoid having two instances of the same VM on the network 32

33 Recommendations: Isolation Response Host will retain access to datastores? VMs will retain access to VM network? Recommended Isolation Policy Rationale Likely Likely Leave Powered On VM is running fine, why power it off Likely Unlikely Leave Powered On or Shutdown Unlikely Likely Power off Allow HA to restart on hosts that are not isolated, likely to have access to storage Avoid having two instances of the same VM on the network 33

34 Recommendations: Isolation Response Host will retain access to datastores? VMs will retain access to VM network? Recommended Isolation Policy Rationale Likely Likely Leave Powered On VM is running fine, why power it off Likely Unlikely Leave Powered On or Shutdown Unlikely Likely Power off Allow HA to restart on hosts that are not isolated, likely to have access to storage Avoid having two instances of the same VM on the network 34

35 Recommendations: Isolation Response Host will retain access to datastores? VMs will retain access to VM network? Recommended Isolation Policy Rationale Likely Likely Leave Powered On VM is running fine, why power it off Likely Unlikely Leave Powered On or Shutdown Unlikely Likely Power off Allow HA to restart on hosts that are not isolated, likely to have access to storage Avoid having two instances of the same VM on the network 35

36 Recommendations: Isolation Response Host will retain access to datastores? VMs will retain access to VM network? Recommended Isolation Policy Rationale Likely Likely Leave Powered On VM is running fine, why power it off Likely Unlikely Leave Powered On or Shutdown Unlikely Likely Power off Allow HA to restart on hosts that are not isolated, likely to have access to storage Avoid having two instances of the same VM on the network 36

37 Admission Control (How to Avoid Problems) 37

38 Admission Control Policies: Static number of hosts Percentage of cluster resources Dedicated failover hosts 38

39 Static Number of Hosts Admission Control Policy 39

40 Recommendations: Admission Control Number of Hosts (Host Failures Cluster Tolerates) VMware vsphere 40

41 Recommendations: Admission Control Number of Hosts (Host Failures Cluster Tolerates) Each Host: 4 CPU x 2.40 GHz CPU 16 GB memory Cluster: 38 GHz 64 GB memory 41

42 Recommendations: Admission Control Number of Hosts (Host Failures Cluster Tolerates) Reservation: 2 GHz 1024 MB Reservation: 1 GHz 2048 MB Each Host: 4 CPU x 2.40 GHz CPU 16 GB memory Cluster: 38 GHz 64 GB memory 42

43 Recommendations: Admission Control Number of Hosts (Host Failures Cluster Tolerates) Reservation: 2 GHz 1024 MB Reservation: 1 GHz 2048 MB 43

44 Recommendations: Admission Control Number of Hosts (Host Failures Cluster Tolerates) Reservation: 2 GHz 1024 MB Reservation: 1 GHz 2048 MB 44

45 Recommendations: Admission Control Number of Hosts (Host Failures Cluster Tolerates) Reservation: 2 GHz 1024 MB Reservation: 1 GHz 2048 MB 45

46 Recommendations: Admission Control Number of Hosts (Host Failures Cluster Tolerates) VM VM 46

47 Recommendations: Admission Control Number of Hosts (Host Failures Cluster Tolerates) VM VM 47

48 Recommendations: Admission Control Number of Hosts (Host Failures Cluster Tolerates) VM VM 48

49 Recommendations: Admission Control Number of Hosts (Host Failures Cluster Tolerates) VM VM 49

50 Recommendations: Admission Control Number of Hosts (Host Failures Cluster Tolerates) VM VM 50

51 Recommendations: Admission Control Number of Hosts (Host Failures Cluster Tolerates) Windows Client vsphere Web Client 51

52 Recommendations: Admission Control Number of Hosts (Host Failures Cluster Tolerates) Windows Client vsphere Web Client 52

53 Recommendations: Admission Control Number of Hosts (Host Failures Cluster Tolerates) Override default behavior vsphere Windows Client Sets a cap on the slot size 53

54 Recommendations: Admission Control Number of Hosts (Host Failures Cluster Tolerates) Override default behavior vsphere Web Client Sets the exact size. Important difference. 54

55 Recommendations: Admission Control Number of Hosts (Host Failures Cluster Tolerates) VM VM 55

56 Recommendations: Admission Control Number of Hosts (Host Failures Cluster Tolerates) VM VM 56

57 Recommendations: Admission Control Number of Hosts (Host Failures Cluster Tolerates) VM VM 57

58 Recap: Static Number of Hosts Admission Control Policy 58

59 % of Cluster Resources Admission Control Policy 59

60 Recommendations: Admission Control Percentage of cluster resources 60

61 Recommendations: Admission Control Percentage of cluster resources 61

62 Recommendations: Admission Control Percentage of cluster resources 62

63 Recommendations: Admission Control Percentage of cluster resources 63

64 Dedicated Failover Hosts Admission Control Policy 64

65 Recommendations: Admission Control 65

66 66 Which Do I Use?!?!

67 Recommendations: Admission Control Basic design principle: Do the math, and take customer requirements into account. If you need flexibility a Percentage is the way to go. Frank Denneman & Duncan Epping VMware vsphere 5 Clustering Technical Deepdive 67

68 vsphere HA VM Monitoring VM Monitoring restarts VM if VMware Tools Heartbeat not received No network or disk activity within I/O stats interval Default 120 seconds customize in vsphere Web Client 68

69 vsphere HA Application Monitoring 3rd-Party Solutions Symantec ApplicationHA Neverfail vappha Application Awareness API open with vsphere 5.0 Download VMware GuestAppMonitor SDK with 5.0 Download VMware Guest SDK for vsphere

70 vsphere HA Futures VMware vsphere HA Today Storage interconnect most commonly queried KB issue Assumes storage connected on other hosts Improvements with vsphere 5.0 U1 and 5.1 Virtual Machine Component Protection (VMCP) Fine-grained controls for VM restart policy Queries destination host(s) for storage health Demo in VMware booth on show floor 70

71 vsphere HA Futures VMware vsphere Fault Tolerance (FT) Today Protects only VMs with 1 vcpu Many mission-critical apps require multiple vcpus SMP Fault Tolerance (FT) Protect VMs that have more than one vcpu 71

72 Customer Support Day Events Coming to a location near you: sharing of VMware best practices! Support Days are a collaboration between VMware Support, Sales and customers you learn directly from the experts Topics are driven by customer input, and typically include: Best practices Tips/tricks Top issues Product roadmaps/demos Certification offerings 72

73 VMware GSS: Important Links Support and Downloads: vmware.com/support Get Support via My VMware: my.vmware.com/group/vmware/get-help Knowledge Base: kb.vmware.com Renewals: vmware.com/go/renew Technical Support Welcome Guide: vmware.com/go/supportguide Licensing Help Center: vmware.com/support/licensing Customer Support Days: vmware.com/go/supportdays Customer Advocacy: Product Support Centers: vmware.com/support/product-support Blogs Support Insider: blogs.vmware.com/kb KBTV: blogs.vmware.com/kbtv KB Digest: blogs.vmware.com/kbdigest twitter.com/vmwarekb Facebook Communities communities.vmware.com YouTube KBTV: youtube.com/user/vmwarekb 73

74 FILL OUT A SURVEY EVERY COMPLETE SURVEY IS ENTERED INTO DRAWING FOR A $25 VMWARE COMPANY STORE GIFT CERTIFICATE

75 INF-BCO2382 VMware vsphere HA Recommendations to Maximize Virtual Machine Uptime Josh Gray, VMware, Inc. Jeff Hunter, VMware, Inc. #vmworldinf