Host Isolation response - VM Shutdown / Restart

Similar Questions

• Host isolation response Question

  So, there were a few questions recently in our company on the host isolation response works in vCenter server 4.1.  Given the descriptions on the options available to the virtual machine power on or at the bottom of the current virtual machine, how HA determines that an isolated host is really isolated and running compared to completely failed (offline)?

  Can someone explain in detail a bit more technical that what the VMware article pages kb explain works host isolation response?

  Reading of how insulation host configurations can be defined, if you set the parameters of insulation "leave the virtual machine running", in case of total failure of host (offline) the other cluster hosts not to try the virtual machine online on another host?  And it is recommended to set the response of isolation to "turn off" so that the other hosts in the cluster can bring the virtual machine online?

  I still don't understand how a host can be determined as 'remote' from the 'offline '.  Isolation is simply the communications network have failed and are virtual machine always happily along on the isolated host.  A host simply default and past in offline mode (power failure Physics for example) is a completely different scenario.  Locks are not released correctly (not be able to any type of response of isolation configuration) and the virtual machine is not running on the host offline

  To the HA cluster if communication is lost to a node of the cluster assumes that the node has failed and will be Jean-Marie to restart the virtual machine on nodes in the cluster of rremaining - locks are constantly updated so if the host is not responding is rather isolated that failed he'll again be refreshing locks on the VMDK files. and virtual machines does not start - it is this feature which allows the AP to work - because with what you describe HA would never--work

  In the scenario were the host disconnects and the virtual machine is not running and the response of isolation is set to "leave the virtual machine running" how other hosts in the cluster determin the host is really low?

  The other guests guess always the isolated host is really down and try to restart the VMs - isloated host system is the machine that will follow response of isolation parameters - either the vms on power or powered by letting off the coast

• The host Isolation response / loss of iSCSI connectivity - what if scenario

  The other thread on automatic shutdown made me think at our facility:

  1. when our building lost power, we lose cooling and networking, but remains on our servers/UPS systems, as they are connected to a backup generator.

  2 Yah, so, it's not good, cooling is lost, and the servers are will heat up, then we must begin to stop them until the coolant has been restored.

  Our 2 ESX systems connect to our SAN via iSCSI - with the lost power, the SAN and the ESX servers are no longer speaks, so I turned off our ESX servers, until the coolant has been restored, as no negative consequences on the correct virtual machines?

  With the connection of networking\iSCSI lost between ESX servers and SAN, that State will be our being for most Windows virtual machines?  They're going to be trashed?  Or ESX has some kind of verification in place for this type of ailment?

  In our current situation, what would be the recommended host Isolation response parameter?

  Thanks for any idea,

  Chad

  Our 2 ESX systems connect to our SAN via iSCSI - with the lost power, the SAN and the ESX servers are no longer speaks, so I turned off our ESX servers, until the coolant has been restored, as no negative consequences on the correct virtual machines?

  It shouldn't - but this will depend on all wht that the VM, the operating system and the application were doing at the time of the accident-

  With the connection of networking\iSCSI lost between ESX servers and SAN, that State will be our being for most Windows virtual machines? They're going to be trashed? Or ESX has some kind of verification in place for this type of ailment?

  ESX does not check this condition - from your virtual machines is on the iSCSI SAN you will find crashed.

  If you find this or any other answer useful please consider awarding points marking the answer correct or useful

• The host Isolation response

  Hello

  Can I know what is "host isolation response '.

  Thank you

  Prashant

  In short: ESXi hosts running in a HA cluster communicate with each other by sending heartbeats. If a host does not receive the heartbeat of the other hosts more and also cannot each address isolation it triggers the response of isolation.

  For more information on HA, please take a look at http://www.yellow-bricks.com/vmware-high-availability-deepdiv/

  André

• vCenter 6 web gui - host isolation response

  Hello

  I was looking at the option of isolation of host and then noticed that he not there no "leave it on" option on vcenter 6 web gui (version 6.0.0 2656761). However, "leave it on" option is still available on the client. As you can see from the screenshots, I chose the option "leave on" on the heavy and used customer "turn off and restart the virtual machines ' option on web gui.

  I really appreciate if someone provides the details to clarify my confusion because I'm not sure what settings will apply in case of isolation of the host.

  
  

  Thank you

  AFAIK the "leave it powered on" in c# client is now called as "Disabled" in the Web Client, which means nothing do, don't react not if the host gets isolated.

  You say that you set the value "leave powered we" in c# client and then when you check the settings for the cluster in the Web Client, it displays "Power Off and restart VM?

  If so, no refreshing or reconnect to the web client result by displaying "Disabled" in the web client?

  I hope this helps.

• HA retry time host isolation?

  Suppose the network breaks for some a host and host isolation response is stopped. After 12 seconds he will make his test of isolation, then will launch to stop the virtual machines running on the host.

  Other hosts will detect the host missing after 15 seconds and try to start them. However, because virtual machines very, probably not even to stop the locks on files are in place. Let's say that according to the workload inside the guest, it will take all of 20 seconds to several minutes to make a gradual stop. (I know there is a sunset that goes off after 5 minutes).

  But my question is, how long and how often other hosts will try to restart the VMs system which vmdk files become available one after the other?

  Duncan Epping describes the behavior of the http://www.yellow-bricks.com/2010/06/30/how-does-das-maxvmrestartcount-work/ reboot

  André

• Several Host Isolation

  Imagine a scenario where we had a HA of four nodes cluster spread on a campus with two nodes in one place and two in the other. What would the host isolation response if the network connection between the two sites has been lost?

  If we lose a host then the TI is known to be isolated after 12 years and then failed aftet 15s. If we lose two, however, nobody is isolated and I am assuming that nothing happens.

  Now; Imagine that we have warehouses of data which are all shared, but some are in one site and some are in the other. Guests running on local data warehouses would be unaffected. Guests who are running on data warehouses remote fails. The question is: what will happen to the hosts failed?

  Thank you

  Warren Barnes

  Before you answer this in detail, I want to make sure I'm clear on my assumptions:

  1. There are 4 hosts in the cluster, two on each side of the stretch. If this is the case, then all 4 hosts are primary. (The first 5 guests in any cluster are primary, so you get only secondary when there are 6 or more hosts).

  2 If the network fails between the two sites, storage will be split-brain as well? I guess that Yes, based on one of your comments.

  If, in view of the #1 site hosts A and B, and site #2 a hosts C a D...

  If, after the split between site 1 and 2, and B can still heart rhythm with each other, and C and D can pulse between them then there is no answer tried insulation. Answers insulation kick only in when a host can not with any of the other primitives of the heart rate, and it can also ping the address of isolation (usually the gateway (s)) for networks that host is on.

  So what happens is that A & B site 1 to conclude that C & D at site 2 have failed. And vice versa. A and B will try to power - on the virtual machines that are running on C and D, even for C & D - they will try and power on virtual machines that have been on A and b. Now, because the storage of some virtual machines can be found at site 1 and storage other virtual machines are at site 2, some of the power-ons may fail because the storage is not accessible. But as A & B will attempt to power on the set of the VMS C & D and C & D will attempt to power on the set of virtual machines of A & B (that means that admission control allows all of these power-ons) then each VM will end up under tension correctly on each site 1 or site 2.

  Now for the ugly part - if any of the VMS to site 1 lost their storage in the score, or vice versa, then the vmware-vmx process who represent these virtual machines always operate on one or more hosts on the side of the partition that has lost the storage and there is now a process vmware-vmx representative the same virtual machine running on a host across the partition that has now acquired a lock on this VM. None of this is a problem until the partition joined. This is so the behavior described by Elisha happens - that is to say the virtual machine appears to bounce back between the two hosts until the answer to the question on the lock lost by pointing the VC client directly to the host. And as he pointed out, the question will be auto-répondu by VC to vSphere 4.0 U2 and above.

  -Ron

• Response of host Isolation and HA

  I was wondering what happens if your cluster 'Response of Isolation host' is set to "leave VM under tension" and you actually have a host fail.  HA will be able to distinguish between a host that is not visible on the network and let these VM under tension and a host that is down and restart these VM elsewhere?

  Thank you

  Yes, a failure of HA, other members can resume the lock that existed prior to the failure of the host for the virtual machine it was running.  In the case of a response of isolation, these locks are not erased, so when other hosts are trying to take over the lock, they are being denied and therefore stay up to the virtual machine and running on the response of isolated, as opposed to the caught locks if the host fails.

  Not the best description and I'm sure I've missed a step or two, but for all purposes, Yes, HA can make a difference between failure and isolation.

  -KjB

• host isolation question

  When ESX host is isolated from the network? Once, he loses the Service Console or the management network WLAN?

  Network isolation occurs when:

  • Host online cannot receive heartbeat of the other primary guests AND

  • The impossible host isolation ping address

  Although your always up and running Layer2 switch and your dependent hos-to-host communication on the basis of the existence, of course network isolation switches will happen.

  http://www.no-x.org

• slow response after the restart of the host

  Is this normal with the VC 2.5 Update Manager after the updates were installed and the host is restarted, it takes forever for the reclamation fill. For example I put a ping goes to the host, and after that the host has restarted, he comes to have 7 minutes for sanitation, task to understand it can complete sanitation.

  Its always been ' not a problem as such "but an observation that the illustrious host offline for awhile while the reboot and then comes back online, then the reclamation task is just there for a few minutes does not turn.

  Like I said this isn't a problem, but I was just wondering if this was normal?

  Concerning

  Dale

  I think it's normal because we have the same problem.

  Robert

• HA sensitivity of host isolation

  Hello

  I was wondering if it is configurable to meanings?

  When you test the abduction of a switch of my kernel stack, I found that battery restarted in response, resulting in a failure full of about a minute.  This is why I really need to configure somehow HA to react only after, say, five minutes for the isolation of the host.

  Thank you very much

  As I understand it, das.failuredetectiontime should be what you are looking for.

  See HA Deepdive for more details

  André

• Stack bluetooth Toshiba occasionally prevents shutdown / restart / logoff

  Hello!

  Sometimes when I try to stop / restart / disconnect my M70 satellite it just does not react without any error message. The only way around this problem is to perform a forced shutdown of shell command "shutdown-s-f" with administrator rights.

  In the application event log, I see the following error message:
  =========================================
  The security descriptor of the application to the Server COM C:\Program Files Toshiba Stack\TosBtSrv.exe application-specific access is invalid. It contains entries of access control with permissions that are not valid. The requested action was therefore not. The application assign this permission of the security program; to change this security permission contact the vendor of the application.
  =========================================

  I integrated module bluetooth onboard, XP Home, with the new battery bluetooth Toshiba page.

  I couldn't set up my computer to use MS bluetooth stack. The solutions proposed on this forum has not worked for me.
  I tried to reinstall the toshiba bluetooth stack a couple of times. Without battery installed stop BT works very well.

  Suggestions how to fix this would be welcome.
  Thank you

  You have special firewall blocking parts of the application?
  What happens if you turn the server part of series the battery COM in
  -Mouse-right click on the Bluetooth icon on the systray-> Options...-> general: turn the Bluetooth Services: Bluetooth COM Port Service (uncheck)
  Reset
  Reboot-> problem still occur?

• Force PowerPoint Shutdown & restart the PC.

  Hello

  Please can you help, I need a script that Force Shutdown if being run PowerPoint and restart the PC.

  See you soon.

  The following command can be placed in a *.bat file:

  Shutdown - r f t 10

  The r - causes a reboot
  F forces to close running applications (e.g., PowerPoint and everything which is currently running)
  The t - 10 causes the closure happened 10 seconds after the command is executed.  If-t is omitted, the default value is 20 seconds

  Syntax: http://www.microsoft.com/resources/documentation/windows/xp/all/proddocs/en-us/shutdown.mspx?mfr=true

• Whenever my host network access changes, merger restarts comments NAT networks

  Whenever my ethernet link status changes, merger 5.0.3 restarts my NAT network for my guest Ubuntu 10.04. This causes all my SSH and NFS connections to freeze up to 1-2 minutes. This also sometimes causes merger itself to beachball.

  Why would he do that? How should I do?

  Thank you.

  Since NAT can use all (or part) interfaces of the host, there is no way of knowing which of your interfaces is used at a given time. So if any host interface is disconnected, interface NAT of the VM needs to be reset. For most use cases, it's the appropriate security behavior, otherwise customers will never notice that the link state has changed and let embusked connections until they expire.

  However, it is understandable that there may be situations where it is not ideal. It is possible to disable the propagation of State of link NAT for all cards in the virtual machine and make NAT networks appear always connected, by adding the following line to the .vmx file:

  vmnat.linkStatePropagation.disable = 'TRUE '.

  
  

  Note that this is distinct from the bridged interface link state propagation, which is controlled by the individual options and ethernet #. linkStatePropagation.enable.

• E530: is not completely shutdown/restart/sleep/setting Hibernate

  Hello!

  I have a brand new E530 Edge with ssd drive intel 520 and i7-3612qm CPU. Latest versions of the drivers are installed.

  The problem is that it only stopped completely - no display shuts off, but fan and LED lit. Same thing happens during sleep, hibernate, restart.

  However, in safe mode it t-stop and restart correctly. It does so without any drivers (tried to reinstall Windows 7 and Windows 8 several times).

  Sometimes (like 1 in 20 tests), it is shut down properly. I was not in a position to know what driver (or combination) are the problem.

  Any advice will be appreciated. I really don't want to go RMA way probably all is needed is a patch/fix.

  Finally found the source of these symptoms. It was a 2nd drive hard ebay cart.

  To resolve this problem, I had to disassemble the hard drive caddy and remove one of the pins SATA (details - http://forum.notebookreview.com/hp-business-class-notebooks/655065-hp-elitebook-8560p-wont-shutdown...)

  Now, the laptop works perfectly!