HA/DRS and a Cluster of 10 ESX host

Similar Questions

• Maximum cluster is eight ESX host?

  I just built a demo in our test lab, and everyone thinks it's the best thing they've ever seen. So far so good. Now I need to move to the production very quickly, and I have a problem. In a few months, we head to a new data center. Due to the increase in the demand for virtual machines, we intend to build the new cluster VI 3.5 with new hosts. But all show them documents claims that the maximum cluster size is 8 guests. Why?

  Normally, I would trust the documentation. But this just limit seems weird to me, so I ask: can I really have only eight ESX host in a cluster that is running the view? Is there a way to bypass this limit? I know that I can do everything simply multiple clusters, but I would really like to avoid this.

  That is right. There is a limitation of 8 hosts per cluster due to a limitation of VMFS.

  Blog:

  http://Communities.VMware.com/blogs/Dommermuth | http://www.thatsmyview.NET/

• Did not backup VCenter VM with space in name and the virtual created from ESX host computer

  Hi all

  Have worked on the backup of VMware VM ESX 4.1,5.1.5.5 for nearly a year and now I'm familiar Vsphere API (VADP), VDDK API,.

  Now, I'm working on the same implementation by using the credentials of vCenter it works very well up there in the name of VM space.

  VDDK API fails to open the disc with the error code VIX_E_FILE_NOT_FOUND 4, I studied on it, the problem is with "vmpath", the setting is mandatory when using VDDK with vCenter.

  vmpath is in cnxParams and it specifies the owner of the particular disc vm.

  vmpath format is "vmpath = DatacenterName/vm/VMname" for example. 'vmpath = myDC/vm/testVM' it works perfectly

  but the problem is when it's likevmpath = myDC/vm/test VM"i.e. the space in my VM name and then fails.

  I use VDDK 5.5.4 and vCenter 6.0 because it is compatible with the other.

  Thank you and best regards,

  Dipak Poirier

  Please provide a code snipped, including the full command. This could make things more clear.

  André

• Connect the ESX host and data store on another ESX host

  Hello

  assuming for this scenario:

  Host ESX 1: esx1

  Host ESX 2: esx2

  It is possible to mount esx2 datastore in esx1? (For example: via NFS). Of course, it is possible use a NAS/SAN intermediary, but I wonder if it is possible to achieve a direct mount.

  Thank you

  Eddie

  Well, to allow another host to share the local data store, the host must be able to act as an NFS server. The problem is, there is no service in one of the ESX version which able to serve that. So, as said what a.p., no, is not possible.

• Disconnected ESX host cannot add to the CR

  It started with me being unable to power on a virtual machine that I created because of "Insufficient resources to meet the level of failover configured for HA" which is great because that's how to configure HA.  I tried to reconfigure the AP to the host by double-clicking on the host and select this option.  Once I did that it failed about 30% with "an error has occurred while setting up the HA Agent on the host" and the networking page disappeared from the configuration tab similar to what a lot of people reported during the upgrade, I think an earlier version.  This is not the case, I did not update anything.  Then I restarted service service mgmt-vmware restart and the ESX host disconnected from the VC altogether.  I can't use the VI client to connect to the host in question, but I am connected via the service console. All VM and the host not to requests ping and everything works. I've disabled HA and DRS and tried to add new ESX host that has not worked.

  Any help is appreciated.  Thank you.

  I found this article that has the same symptoms as you.

  http://KB.VMware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalID=1004451

  Check if your esx.conf file is corrupted. Follow the directions in the KB article to restore or recreate.

  Arnim - van Lieshout

  -

• Average use of CPU and memory of the ESX host

  Dear team

  script of powercli necessary to fetch the last 2 month avg cpu and memory utilzaition for all ESX hosts that are managed by vcenter server.

  concerning

  Mr. Vmware

  Try something like this

  $esx = Get-VMHost
  $start = (Get-Date).AddMonths(-2)
  $metric = "cpu.usage.average","mem.usage.average"
  Get-Stat -Entity $esx -Start $start -Stat $metric | Group-Object -Property {$_.Entity.Name} |
  Select @{N="VMHost";E={$_.Name}},  @{N="Avg CPU %";E={$_.Group | where {$_.MetricId -eq "cpu.usage.average"} |
      Measure-Object -Property Value -Average | Select -ExpandProperty Average}},  @{N="Avg Memory %";E={$_.Group | where {$_.MetricId -eq "mem.usage.average"} |
      Measure-Object -Property Value -Average | Select -ExpandProperty Average}}
  

• How to add an ESX host licensed to vCenter (vShpere4.1)

  Currently licensed for: 3 guests (Advanced vShpere 4)

  Ok.. so, I have vCenter upwards and in the course of execution, have created my 'cluster' with two hosts. I have an ESX host 3rd I was using mode "assessment" within 60 days.

  This 60-day period was close that expires so I moved and the 3rd license added to this 3rd host.

  I would now like to bring this host to vCenter, for my 'sandbox network' and not actually add it to the 'cluster' so that I can run everything a customer.

  Now, it is said that I am unable to bring this host to vCenter, as it says that I don't have a license.

  So, how can I go on the withdrawal of the license, or get this host (already licensed) in vCenter?

  Or do I have to start from scratch and reload this bare metal esx host to return to Mode Eval?

  Since it's vShpere, there is "No license server" by not telling.

  Licensing vCenter says that 'two' licenses during the third host is the 3rd license already.

  Any help appreciated.

  By the way... I have searched for hours on forums, web sites, etc., with no clear solution.

  Thank you

  Howard

  Interesting,.

  of your screen grabs, it definitel; appears as if you have only 2 licenses - as stated above, however, if your license covers only 6 processors, you could have used the additional licenses on them.

  It is really worth to check that, and if it is not the case, get your hands on VMware and ask why the additional licesnse does not appear in your portal.

• You can restart nfs storage WITHOUT having to reboot ESX host?

  Hi community

  I wanted to know what your experience has been reset to the nfs storage devices WITHOUT having to restart the ESX servers. I can stop the virtual machines that use the storage, but would like to avoid off ESX hosts as they require a visit to the data center for put in operation and I can do all the rest of the House.

  My options are either then restart the ESX host (that I can do it remotely of course) or the ESX Server restores in the nfs storage when it is up?

  This is the first time such a restart will be required so I use

  this as a learning experience and the VMs on those ESX hosts are not

  criticism.  (although don't tell users which.) )

  Thanks in advance

  Yes, of course you can.

  ESXes automatically reverts to the storage.

  ---

  MCSA, MCTS Hyper-V, VCP 3/4, VMware vExpert

  http://blog.vadmin.ru

• cannot remove vMA ESX hosts

  I added a few guests of the vMA and activate the newspaper collection.  It collects logs for the hosts with success.  I don't want to follow these with the vMA hosts more because they are in a remote location and that it would implement a vMA at the remote location.  I use the sudo vifp removeserver servername command to remove the ESX host and they are eliminated as appropriate.  I run the vifp order mailing lists and they appear more more.  The thing is that the newspaper collection is still happening against the machines on the vMA.  I'll look in the directory/var/log/vmware and the directory for the ESX host, I deleted is still there.  I removed the directory and they immediately come with newspapers.  I'm going to rerun the command to remove the host and he says that they are already removed.

  How get rid you of the machines out of the vMA?

  You must use vilogger to disable the first control, and then remove the targets of vMA. Looks like vilogger works regardless of what VMAs think its management.

  If you have removed the targets of MAS... should not be able to connect to your targets from a distance. Are you sure that the log data is always transferred or is it simply a directory being created?

  There is a local credstore that is stored in the home directory of vi-admin /home/vi-admin/.vmware/credstore, perhaps you may need to disable it (make a backup first and move or rename)

  =========================================================================

  William Lam

  VMware vExpert 2009

  Scripts for VMware ESX/ESXi and resources at: http://engineering.ucsb.edu/~duonglt/vmware/

  repository scripts vGhetto

  VMware Code Central - Scripts/code samples for developers and administrators

  150 VMware developer

  Twitter: @lamw

  If you find this information useful, please give points to "correct" or "useful".

• Should we the DRS and VMotion for tolerance fault? Small cluster host 3

  Hello

  I'm slightly confused on some information coming from two different directions. We are in the stages of buying a package of Vsphere Essentials Plus and intend to build a 3 host with shared storage cluster. VSphere essentials plus the package comes with HA which, from my understanding, fail over automatically and restart the virtual machine on the available server. In case of server failure Vmotion or DRS provides something more than HA.

  We are told that VMOTION & DRS moves virtual machine of FAILURE to an available server without restarting the virtual machine. I don't know how that's possible, but I wanted to check first with the community.

  VSPHERE 4 ESSENTIALS PLUS seems ideal for small host deployments 3 @ $2 600 however, that same lic. for the regular VSPHERE enterprise is $2 800 per CPU that @ 6CPUS is more than $17 K.  Then why should we spend $17 K for business verus a $2 600 essentials more lic for such a small deployment?

  Thank you

  CA

  Yes, this is a new feature. http://www.VMware.com/products/fault-tolerance/

  It may work on the existing links, but it is recommended to have dedicated interface for FT.

  ---

  VMware vExpert 2009

  http://blog.vadmin.ru

• Add production ESX hosts to a cluster

  Hi all

  I did some research in the admin guides and community forums, and I'm sure that I know what to do, but I would really appreciate a test of consistency here because the manipulation I do is in a production environment:

  I have a campus that contains two ESX areas that are managed by using vSphere and connected to a San. vMotion of works very well, the performance is very good (although the resources of the two boxes are fairly complete upward). However, I recently realized that I'd neglected to set up a cluster HA and DRS.  I want to remedy.

  I created the cluster with these specs:

  • the two HA and DRS, enabled
  • to the left, she also fully automated.
  • the power management of left
  • monitoring and host admission control enabled
  • leave the default settings for the behavior of the virtual machine
  • monitoring VM disabled
  • EVC enabled
  • the storage value of the swap with the virtual machine file

  I think that the next steps would be to add each ESX host consecutively and merged its resources with the cluster. However, here are a few questions:

  • How do you assess the risk factor to do this in a production environment (1 = perfectly safe, is a proven Scenario; 5 = you are out of your bloody mind? Do not)
  • Should I be triple-checking the SAN snapshots and planning of downtime for servers, or is it possible live and without any major qualms?
  • Am I right in assuming that it will increase my performance as well as provide better robustness of the campus, or should I expect a decrease in performance?

  Thank you very much in advance for your advice!

  Hey red,

  Addressing your particular situation, I would say yes to two questions.  Admission control HA is here to help you.  Ensure there are enough resources on the host computer to run the current and any expected load it will be after an HA event.  50% is close to default (but it is really based on the size of the slot) in an environment with two guests when guest cluster failures tolerates is set to 1 in a two and 25% host environment when the percentage of unused reserved as production capacity cluster resources in failover is left to its default value.

  If you have several virtual machines running that allows you to book 50% of your cluster resources (which it sounds like you have), then you have the option of "first category" your virtual machines and their giving priorities to restart event HA.  For their level, you'll want to active DRS (can be set to manual Automation), resource pools and you will need to configure your virtual machine under your HA settings options.  You'll want to pay attention to the priority of restarting VM here.

  I suggest you take a look at blog Duncan Epping http://www.yellow-bricks.com/ and Frank Denneman http://frankdenneman.nl/blog. They are all two fairly well the definitive answer to the HA and DRS questions and advice.

  See you soon,.

  Mike

  http://VirtuallyMikeBrown.com

  https://Twitter.com/#! / VirtuallyMikeB

  http://LinkedIn.com/in/michaelbbrown

  Note: Epping and Denneman explained that the amount reserved by default resources when you use the host cluster failures tolerates is promising to reserve enough resources to power on virtual machines.  This reserve of resource does not on average current, account, or future default load.  If you want to manipulate this feature, modify the memory and CPU reserves, which are the numbers used to calculate the size of the slot.

  Post edited by: VirtuallyMikeB

• DRS and HA

  Could someone explain in clear terms and details of what is happening on the background of the HA and DRS.

  Thank you

  Basically, these two requires shared resources on the storage like iSCSI, NFS & FC and have also meet requirements on the cluster before you can activate the.  High availability is used to interruptions not planned, such as the systems has crashed or power problem.  It will automatically restart your virtual guests at an eve of hosts within the cluster and the rule of priorities and the reboot process can be adjusted according to your preference.  There are 5 primary coordinators and secondary standby Coordinator within the PA, and allows a maximum of 4 hosts failed in a cluster, the 5th main Coordinator to perform work.  Distributed Resource Scheduler is essentially a mechanism of load balancer within the ESX groups where all CPU and RAM are distributed evenly, and you can assign to be conservative or aggressive or automatically with the level of recommendations.  These features can be managed using vCenter server.

  If you found this information useful, please consider awarding points to 'Correct' or 'useful '. Thank you!!!

  Kind regards

  Stefan Nguyen

  VMware vExpert 2009

  iGeek Systems Inc.

  VMware, Citrix, Microsoft Consultant

• DRS and automatic startup & Shutdown each other?

  I have a client with 4 3.5, using HA & DRS ESX host.  We want to configure Autostart VM & stop with the hosts, the potential problems of power are made with elegance.  And more of the virtual computers must be started in a specific order.  How can we achieve this?  It looks like if specify us the order started on the individual hosts, and then a virtual computer is moved to another host by the DRS, the boot order is blown.

  Hello

  This option works only for guests 'stand alone '. So it does not work in a Cluster.

  Lars Liljeroth

  -

• DRS and CPU % ready

  What VC & DRS seem to make decisions to migrate virtual machines with respect to the use of the processor?  Is it only in overall CPU utilization on ESX hosts in the cluster or is he looking at other factors such as the ready values % of CPU on the host computers?  For example, that you have a 16 core host and several 4 virtual computers vCPU that perform poorly and have very high CPU % ready times, but the overall use of the CPU on the host computer is low, DRS trying to rebalance these virtual machines?  Thank you.

  I made this request even in queries.  Now its only looking at the CPU usage and does not know about the other factors regarding the use of the CPU.

  I had some older hosts that while the CPU was used only to values of RDY % medium, about 30% were constantly 5-15 then it became unacceptable and once DRS passed everything was when one or more of the virtual machine started going to 100% on my old plug cores doubles one.  New hardware that resolved completely so (more than hearts) for me so it's not a problem anymore for me.

• HA/DRS without DNS cluster

  Hello

  What I want to do is add the ESX host for VC using IP addresses and then put up a cluster. Is this possible?

  Simply, DNS resolution is essential for HA/DRS?

  Martin

  You can use the file/etc/hosts, but as soon as the update 2 HA will work with the IP adrdess and are more reliant on DNS resolution.  Personally, I would use files hosts just because it is easier to identify a nameserver on IP, but either should work.

  SID Smith-

  VCP, CCA (Server Xen), Hyper-V & SCVMM08 MCTS, CCNA and VTSP

  http://www.dailyhypervisor.com

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