31. vSphere Fault Tolerance (FT) Explained: Architecture, Fast Checkpointing, & How FT Works!
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- čas přidán 22. 03. 2022
- 31.vSphere 7.x - vCenter Cluster Feature - vSphere Fault Tolerance (FT) | Home Lab
vSphere Cluster Features
Session-3 | vSphere Fault Tolerance (FT) | Home Lab
Agenda
=======
Quick Recap - vSphere Clusters Overview
vSphere Infrastructure - Challenges & Solutions
vSphere: Protection at Every Level - Conceptual Diagram
vSphere Fault Tolerance (FT) Architecture
Enabling a VM
How does FT Work
FT Features
FT Configuration Limits
FT with HA & DRS
FT Redundant Vmdk Files
FT Fast Checkpointing
FT Shared Files
vSphere Features - Real-time Scenarios
vSphere FT Home Lab
==================
Create a Cluster and enable HA & DRS Features
Add ESXi hosts to the Cluster
Turn on vSphere Fault Tolerance (FT) for a VM using the vSphere Client
Test vSphere FT Functionality
View the vSphere Cluster resource Usage
#VMware
#vsphere
#ServerFundamentals
#Virtualization
#VCP-DCV
#ESXi
#VM
#Networking
#vCenter
#VCSA
#VCSA Deployment
#vCenter
#Architecture
#SDDC
#VAMI
#NSX-T
#VSAN
#VRO
#VRA
#Block Storage
#File Storage
#Object Storage
#NFS 3
#NFS 4.1
#Veeam
real-time scenarios
#ThankYou
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31.vSphere 7.x - vCenter Cluster Feature - vSphere Fault Tolerance (FT) | Home Lab
vSphere Cluster Features
Session-3 | vSphere Fault Tolerance (FT) | Home Lab
Agenda
=======
Quick Recap - vSphere Clusters Overview
vSphere Infrastructure - Challenges & Solutions
vSphere: Protection at Every Level - Conceptual Diagram
vSphere Fault Tolerance (FT) Architecture
Enabling on a VM
How FT Works
FT Features
FT Configuration Limits
FT with HA & DRS
FT Redundant Vmdk Files
FT Fast Checkpointing
FT Shared Files
vSphere Features - Real-time Scenarios
vSphere FT Home Lab
==================
Create a Cluster and enable HA & DRS Features
Add ESXi hosts to the Cluster
Turn on vSphere Fault Tolerance (FT) for a VM using the vSphere Client
Test vSphere FT Functionality
View the vSphere Cluster resource Usage
#VMware
#vsphere
#ServerFundamentals
#Virtualization
#VCP-DCV
#ESXi
#VM
#Networking
#vCenter
#VCSA
#VCSA Deployment
#vCenter
#Architecture
#SDDC
#VAMI
#NSX-T
#VSAN
#VRO
#VRA
#Block Storage
#File Storage
#Object Storage
#Storage
# vSphere Storage
#FC SAN
#iSCSI SAN
#FCoE SAN
#vSAN
#vVols
#Virtual Volumes
#Virtual SAN
#Multipathing
#NFS 3
#NFS 4.1
#Veeam
#real time scenarios
#ThankYou
1. IT Infrastructure Evolution & vRealize Automation (vRA) 8.6.2 Architecture Overview
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1. VMware Datacenter Virtualization Basics
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2. Basic Server Fundamentals and Windows Server 2022 ACTIVE Directory AD Configuration
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3. VMware Data Center Virtualization |VCP DCV_ ICM Architectural Differences, Virtual Machines
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4. VMware DCV ICM ESXi Host Build Procedure and Lab
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5. VMware DCV ICM ESXi Host Configuration and Management | ESXi Host Components & Log Files
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6. VMware DCV ICM ESXi Host Networking & Basics of Networking
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7. VMware DCV ICM ESXi Host Networking & IP Addressing
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8. VMware DCV ICM ESXi Networking & IP Address Classification & Reserved IPs
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9. VMware DCV ICM ESXi Host Networking Standard vSwitch
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10. vSphere 7.x - ESXi Host Networking - vSwitch Policies & Home Lab
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11. vSphere 7.x | vCenter Server 7.0 Architecture & Home Lab
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12. vSphere 7.x vCenter Server 7.0 Install, Configure, Manage & Home Lab
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13. vSphere 7.x Architecture ,SDDC ,Inventory Objects Overview & Home Lab
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14.vSphere 7.x - vCenter Inventory Objects & Home Lab
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15. vSphere 7.x - vSphere Storage Concepts & Home Lab
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16. vSphere 7.x vSphere Storage - NFS Datastore Configuration | Home Lab
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17. VMware vSphere 7. x Storage - How to Configure NFS Datastore on Windows Server 2022 | Homelab
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18. vSphere 7 Storage - How to Configure iSCSI SAN on ESXi host using Windows Server 2022 | Homelab
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21. vSphere 7.x Virtual Volumes (vVols) Architecture | Home Lab
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22. vSphere 7. x Virtual Volumes (vVols) Architecture | Real-Time Scenarios | Home Lab
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23.vSphere 7.x vSAN , vVols, Distributed vSwitch & Home Lab
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24.vSphere 7.x VMs, Snapshot, Clone, Templates | Home Lab
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25 . VM Snapshot, Clone, Templates | Windows Server OS Upgrade from 2019 to 2022 | Home Lab
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26.vSphere 7. x | VM Migration Methods Cold Migration, Suspended, vMotion, EVC, SvMotion & Home Lab
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27.VMware vCenter Converter Standalone - P2V, V2V, Hyper-V VM2V| Home Lab
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28. VMware Converter - Converting from Workstation VM to vSphere VM (V2V) | Home Lab
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29. vSphere 7. x - Clusters, DRS, DPM, vCLs, HA, FT and Protecting Data | Home Lab
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30. vCenter Cluster Feature - High Availability (HA), Protecting Data using Veeam & Home Lab
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superb video !! deep knowledge
Thanks a lot
good explanartion
Thank you
Nice video and clear understanding of FT. One query ,
how about the licensing of applications( for example Kepware) ? Whether same license will work once secondary copy is created?
Thank you for your positive feedback!
In most cases, software licensing can vary depending on the specific terms and conditions set by the software vendor.
When implementing fault-tolerant solutions like VMware FT, it's important to consider how software licenses are managed, especially when running redundant instances or creating secondary copies.
Some software vendors may require separate licensing for each instance or copy of the application, while others may offer special provisions or licensing models for fault-tolerant configurations.
It's essential to review the software license agreement and consult with the vendor to understand their licensing policies regarding fault tolerance.
In the case of Kepware or similar applications, it's recommended to reach out to the vendor directly to inquire about their licensing policies for fault-tolerant deployments.
They can provide you with the most accurate and up-to-date information regarding licensing requirements and considerations in such scenarios.
Additionally, consider exploring options for license mobility or volume licensing agreements that may offer flexibility and cost savings for deploying redundant instances of the application.
@@gnancloudgarage5238 Thank you.
@@user-cz2sr1hl8f Welcome
Sir kindly make VMware Snapshots, DRS,Esxi got hang stae what will do.Deep drive.
Hi Sir, Sure will do that. Thanks
but what will happen to the real primary VM when it's up again on another host, because the FT already creates a new secondary vm
Automatic Handling by VMware FT:
VMware FT is designed to handle these scenarios.
If the primary VM is restarted on a different host, and the secondary VM is already running, FT will detect the conflict and initiate a new failover.
The original secondary VM becomes the primary, and a new secondary VM is created on the host where the original primary VM was restarted.
It's important to note that FT is designed to provide continuous availability in the event of a host failure.
If the original primary VM becomes available again, FT ensures that the primary and secondary VMs are properly synchronized to avoid data inconsistencies.
yes but as i think, there is now 3 vm? 1. original primary vm, 2. the secondary vm (now primary cuz failover) 3. the new secondary vm it's just created, or it will not create a new secondary vm but take the original primary vm as primary again? or disapere the original primary vm? im confused
so the first primary VM (on ESXI1) will replace the "new secondary" VM (on ESXI3) because you have now second Primary Vm (on ESXI2). earlier primary on ESXI1 and secondary on ESXI2. then the secondary is now the primary on ESXI2 and the Primary from ESXI1 will move to ESXI3 and be the secondary?
Good afternoon. First, congratulations for the video. Two questions:
1-If the host where the main VM is allocated fails, the replica VM takes over from the other host. But if the primary VM fails, can the replica VM take over or is this feature just for host incidents?
2-Can we use Fault Tolerance for VMs with HD above 3 TB?
Grateful.
Hi,
Very Good Afternoon!
Thank you for your best wishes😊
1) Yes, If the Primary VM fails, Secondary VM will take over within a fraction of seconds without interruption not only for Host incidents but also for any VM-related failures.
2) Answer is we can not use over 3 TB Capacity because Fault Tolerance is not supported with a 2TB+ VMDK , refer to the below official article.
docs.vmware.com/en/VMware-vSphere/7.0/com.vmware.vsphere.avail.doc/GUID-C1749AD4-70E2-406C-864C-719F54BF1BC1.html
@@gnancloudgarage5238, thank you.
@@tainadesousadias3399 You're welcome
Hello, i have a question, in the video the FT was not successful right? i mean the vm was not on
Hi Ricardo Lopez,
Yes, There was an error initially because there is no FT-enabled VMkernel Port group.
Hence, we were created the FT Port group and followed by FT Enabled on “windows10-vm01”
FT Observation:
• windows10-vm01 (primary) was powered on
• Windows10-vm01 (secondary) was in a power-off state
There were some warnings & errors due to a resources crunch in the home lab :-)
Thank you
Hi,
I´m searching long time now for a answer, but cant get it ...
related question:
The maxvcpusperhost can be set to 0. does that mean if i set it to 0 it is not supported?
with enterprise plus i can use 8 vcpus per host, what, if i use 2 enterprise plus licenses for 1 host? ..but related to the question above with maxvcpusperhost set to 0?
and also
is it possible to assigne explicite cpu cores from the cpu for the ft vm?
as an example, if I have 2 cpu's in the host, can I explicitly assign 8 cores of cpu2 (socket2) to the ft vm and the other cores to other vm?
thanks,
br
Hi,
Good Question!
Here are the details for your review.
das.maxftvcpusperhost:
The maximum number of vCPUs aggregated across all fault-tolerant (FT) VMs on a host.
The default value is 8. There is no FT vCPU per host maximum, We can use larger numbers if the workload performs well.
We can deactivate checking by setting the value to 0 (Zero)
Licensing:
The number of vCPUs supported by a single fault-tolerant VM is limited by the level of licensing that We have purchased for vSphere.
Fault Tolerance is supported as follows:
• vSphere Standard and Enterprise. Allows up to 2 vCPUs
• vSphere Enterprise Plus. Allows up to 8 vCPUs
So, We can not assign two Ent+ Licenses for the same host and there is a limit as well, refer to the following FT Configuration Maximums.
FT Configuration Maximums:
• FT VMs per host = 4
• FT vCPUs per host = 8
• FT vCPUs per VM = 8
Thank you
@@gnancloudgarage5238 Hi, thank you for your answer, but there is a question open:
is it then supported if i deactivate the check and use 16vCPUS on a single FT VM on a host? because i dont understand why i can deactivate this check? in one thing it says theres a maximum of 8vCPU but on the other hand vmware says i can deactivate it? that makes no sense to me sorry :((
thanks for your time!
br, manuel
@@ilovemyride1988
Hi,
Please refer to the inline response to your questions.
• Can I increase to 16 vCPUs after deactivating “das.maxftvcpusperhost = 0”?
“das.maxftvcpusperhost” cannot be increased, because it is limited by license conditions,
But we might elect to reduce it, to prevent a host from being loaded too much.
• Why can we deactivate this setting “da s.maxftvcpusperhost = 0”?
• What VMware has given this option to deactivate (“das.maxftvcpusperhost = 0”) it?
As we are aware,
“das.maxftvmsperhost” whose default value is 4,
“das.maxftvcpusperhost” whose default value is 8
These above two values can be decreased but an increase is not recommended due to license limitations.
For example FT VMs Groupings based on Ent+ License such as follows
8 vCPU limit = 1 VM with 8 vCPUs
8 vCPU limit = 2 VMs with 4 vCPUs
8 vCPU limit = 4 VMs with 2 vCPUs
8 vCPU limit = 1 VM with 4 vCPUs + 2 VMs with 2 vCPUs
8 vCPU limit = 1 VM with 4 vCPUs + 1 VM with 2 vCPUs + 2 VMs with 1 vCPU
The reason VMware gave deactivate option, There are scenarios to power on VM or VMotion more FT VMs to one host, and moving one of the existing FT VMs to another host is a challenging situation.
Hence disable this restriction by setting the value to 0 during that challenging scenario only .
Thank you
@@gnancloudgarage5238
Hi,
Thank you for your explanation, the vmware documents just don't make sense to me, because it's somehow ambiguous and it doesn't mention when which scenario is supported! If I understand your answers correctly now, it is not supported to use more than 8vCPUs per HOST for FT, right? and this cannot be changed with a second enterprise plus license for a host either, right?
you can only disable it but it is not supported and recommended
So if I want to use 2 vm's with 8vCPU each, I absolutely need 4 hosts with 4 enterprise plus licenses (in my scenario this would be a VSAN cluster, i.e. 4 host + witness, do I understand that correctly?
I really want to thank you for your time!
@@ilovemyride1988
Hi,
Yes, It is right.
Thank you
Hi master, in FT shared files two VMs are sharing a datastore. But two FT must have different data stores right. This make me confused. Pls me in understand
Hi Naga Sekhar,
Yes, VMs will use separate datastores only and refer to the vSphere FT architecture ( Video Time 10:30) for better understanding.
Thank you.
@@gnancloudgarage5238 yes sir I agree with you about separate datastore for both primary and secondary machines.
At 42:28 in the slide it mentioned that two VMs have a shared.vmft
@@nagasekhar2689
Hi Sir,
As we are aware vSphere FT Provides fast checkpointing (means continuous copying) to keep primary and secondary VMs synchronized.
In this process, there are vSphere FT Shared files (shared. vmft) and There should be some purpose when we have share files.
shared. vmft contains the primary and secondary VMs UUIDs of Primary and secondary VMX paths.
Hence, It will lead to two active copies of a VM after recovery from a failure.
For example:
In general, there is a witness signature for any house registrations :-)
Similarly, this shared.vmft is a witness (Observer or Evidence) that which UUID belongs to Primary VM and which UUID belongs to Secondary VM.
So that there will be no conflicts in case of any unexpected issues on one of the VMs.
That is the reason in our Slide(42:28), We have kept the heading as vSphere FT Shared Files and not secondary VM.
Reference article: kb.vmware.com/s/article/2116110
Hope it clarifies for you.
Please let me know if you have any questions.
Thank you