Response of host Isolation and HA

Similar Questions

• 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

• 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

• 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

• Auto Deploy, host profile and answer files

  Hello

  I'm busy trying to learn a little more about Auto deploy. I'm trying to figure out what is the best practice when it comes to the part host profiles of the automatic process of deploy. The way I see there are two ways to use host profiles.

  (1) for each host, I create a separate host profile and create necessary deployment rules, one rule per host.

  (2) I create a host profile and only one rule of deployment and then use the response file option to create the unique settings of the host.

  I've set up two option, option 2 seems less reliable while option 1 works every time. So my main question is what is the recommended method to use profiles to host with Auto deploy.

  Thank you

  Hello

  It is usually done through your supplied option 2.

  Create a profile from a host of reference and apply this profile to a host or a cluster.  Usually a cluster or however you define your deployment rules.  Update of the personalization of the host, then remove it from maintenance mode.

  Documentation on the profiles of the host.

  Here a documentation to Auto deploy

  I am a big fan or Pluralsight and Nash did a great job in this series.

  Training, Pluralsight

  Course: VMware vSphere Optimize & scale series

  Part 3: Monitoring & Automation

  Section: Self help to deploy for the deployment of ESXi

  So, that is the 'best practice' or ' recommended?  Good question.  Which is usually answered by - what is best for you!

  I hope this helps a little.

• 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

• "Media Center host module" and "ehRec.exe.

  After the reboot, I now get an error message titled "Media Center host Module", and when I click on the error report, it says something about "ehRec.exe.

  Hello Warhick1981,

  Thank you for your message.  Please follow the steps below to re - save some necessary files in Windows Media Center.
  Click 'Start' > select 'run '.
  Type cmd and press enter
  Once the open command prompt, type the following commands at the same time, pressing ENTER after each line.
  Regsvr32.exe atl.dll

  C:\WINDOWS\eHome\ehSched /unregServer

  C:\WINDOWS\eHome\ehSched/service

  C:\WINDOWS\eHome\ehRecvr /unregServer

  C:\WINDOWS\eHome\ehRecvr/service

  C:\WINDOWS\eHome\ehRec.exe /unregServer

  C:\WINDOWS\eHome\ehRec.exe/regserver

  C:\WINDOWS\eHome\ehmsas.exe /unregServer

  C:\WINDOWS\eHome\ehmsas.exe/regserver

  Restart your computer and test.
  Please let us know if it did or it does not solve your problem.
  See you soon

  Engineer Jason Microsoft Support answers visit our Microsoft answers feedback Forum and let us know what you think.

• Windows7 won't let me edit the hosts file and save it

  Windows7 won't let me edit the hosts file and save it. What should I do to save the edited host file?

  This is a built-in security feature.  There is an easy solution.  Click onStart-> all programs-> Accessories.  Right click onNotepadand then click run as administrator.  If you are prompted for an administrator password or a confirmation, type the password, or clickallow or Yes.

  Open the Hosts file (from the notebook, that you opened), make your changes, and then click file ->Save.

  Barbara

• Adding host name and the name of tablespace in the alarm e-mail

  I'm trying to figure out how I can put the host name and the name of the table space in the e-mail alarms.

  Rule name: _DBO - use of Tablespace

  Scope of the rule: DBO_Cust_DBO_Cust_Tablespace_pct2 where nom_tablespace! like '% UNDO % '.

  Tried the following queries to run the query Condition and did not

  return scope.get("tablespace_name").get ("value")

  return scope.get("tablespace_name").get ("name")

  Do you have any suggestions on how to display the host name and the name of tablespace in the alarm email?

  

  Using scope: DBO_Tablespace

  hostname = scope.get('monitoredHost/name')

  tablespaceName = scope.get ('tablespace_name')

  Kind regards

  Brian Wheeldon

• popular error; An error occurred when opening a virtual disk. Make sure that the converter server and source running machines have network access to the ESX/ESXi hosts source and destination.

  Once again; same problem, others have encountered but nothing seems to work.

  An error occurred when opening a virtual disk. Make sure that the converter server and source running machines have network access to the ESX/ESXi hosts source and destination.

  We have 1 physical servers, we need to see. Here is the environment. All 3 separated location, 3 all firewall separated

  1 physical servers

  -Internal IP address; 172.16.160.21
  -FARM Firewall

  vCenter Server

  -Internal IP address; 172.16.1.85

  -Local Office (ALX)

  Location of destination (ESXi host):

  -Internal IP address; 172.16.153.20

  -Firewall ROOMMATE

  
  Already completed:

  VMware KB: disable SSL on VMware Converter Standalone 5.x encryption   SSL disabled in converter-worker

  Firewall are open / Tunnel is open throughout the environment.

  I have attached the logs.

  Thank you very much

  POCEH; Thanks for the reply. But I wouldn't be pulling my gray hair if I knew what the problem was. I understand that there not for the peer but why...?

• Wait for the host disconnects and then run a command

  Hello world

  I have a stop script for my virtual infrastructure, now I have to add code to stop an Equallogic AFTER the last host table is turned off.

  I know the commands to do this, but I need help to write a loop that will test the ip address of the last host management and wait until this station responds to pings.

  In my script I have to establish what host will be put off to the end so it's not a problem... How can I keep ping IP management host to die and then run the commands Equallogic?

  I hope that I managed to explain to me... I was exploring the Test-Connection cmdlet but it seems that it displays che echo of the ping instead of State... I'm a bit lost around this, can someone help me please?

  Something like that would do the trick?

  $count = 0

  $maxWait = 10

  {}

  $count += 1

  Write-Output "$(get-date-f HH) $(get-date-f JJ/MM/AAAA)-host is offline."

  sleep 5

  } until (!) (Test-Connection 192.168.110.85 - BufferSize) count 16-1 - calm)- or ($count - gt $maxWait))

  If {($count - gt $maxWait)

  Write-Output "Host always online."

  }

  else {}

  Write-Output "$(get-date-f HH) $(get-date-f JJ/MM/AAAA)-host is offline."

  }

• Converter does not have "an error occurred when opening a virtual disk. Verify that the Converter server and source running machines have network access to the ESX/ESXi hosts source and destination. »

  Hi all

  I'm having some trouble converting server physical windows using autonomous vConverter 5.5.

  error message:

  "An error occurred when opening a virtual disk. Verify that the Converter server and source running machines have network access to the ESX/ESXi hosts source and destination. "

  I have attached the bundle newspapers. Please notify.

  See you soon...

  Your error is:

  2014-11 - 04T 18: 27:27.587 - 08:00 [01236 info "Default"] GetManagedDiskName: Get disklib file name as vpxa-nfcssl: / / [a0110-vmgt70-001] WIN-MOVRCVCSITG/WIN-MOVRCVCSITG.vmdk@a0110tesxhyp01.datacenter.telenorservices.com: 902! 2 b 52 87 75 03 03 ff 49-67 2f 3 a 61 76 and 00 cd e1

  2014-11 - 04T 18: 27:27.587 - 08:00 [01236 WARNING 'Default'] [, 0] NfcNewAuthdConnectionEx [NFC ERROR]: unable to connect to peer. Error: Failed to search for host for a0110tesxhyp01.datacenter.telenorservices.com server address: the requested name is valid, but no data of the requested type was found

  2014-11 - 04T 18: 27:27.587 - 08:00 [01236 info "Default"] Sysimgbase_DiskLib_OpenWithPassPhrase failed with 'NBD_ERR_NETWORK_CONNECT' (error code: 2338)

  Check the manual on the required ports.

  HTH

• The traffic between a host ESXi and vCenter Server is secure?

  Dear team,

  You pray let me know is traffic between a host ESXi and vCenter server (vice versa) is secure?

  The VC and ESXi version is 5.1U1a

  concerning

  Mr. VMware

  Default SSL certificates are installed automatically. However, you can configure the third-party SSL certificates to make the environment more secure.

  Please see:

  VSphere Documentation Centre

  http://pubs.VMware.com/vSphere-51/topic/com.VMware.ICbase/PDF/vSphere-ESXi-vCenter-Server-51-Security-Guide.PDF