Host isolation response Question

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

• 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

• Host Isolation response - VM Shutdown / Restart

  Gents,

  I couldn't find answer to my question myself so maybe you can help me.

  Let's say we have cluster HA VSphere 4.1 with the default settings. On hosts loses the connection to the network and all the HA primary agents start 15 sec count down. The host of problem also begins his 15 sec timer and after 12 seconds, it tries to ping the default gateway and does not answer. So he decides that he is isolated. If the network connection is not restored within 15 s primary HA officers decide that host problems failed and try to restart the virtual machines, but they can do VMS files are always locked by host problem which just initiated the process of virtual machine downtime after 15 s time of isolation.

  So my question is how that VMs are restarted then if they are not be restarted the first time? Primary HA officers constantly try to restart on alternate hosts?  They try always to restart virtual machines even if the host of the problem can't stop for 300 s and then power off? This missing part of information is really boring

  Would be very grateful for any useful information.

  http://www.yellow-bricks.com/2010/06/30/How-does-das-maxvmrestartcount-work/

  All this kind of thing is also explained by the way in my next book! Should be available through my blog in a week.

  Duncan

  VMware communities user moderator | VCDX

  -

• 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

• 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

• 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

• Muse Contact form response questions

  Can anyone help with this problem.

  Please contact Adobe.
  A representative will be with you shortly.

  Thank you for your patience.

  In the meantime, you can try our community forums where experts are available 24 hours a day, 7 days a week.
  

  Now you can chat with Sonam.

  Vicky Quick: The contact form for the sites of the Muse does not have my clients to meet the person who contacted them. It updates their address at the top, forcing them to cut and paste the person seeking information. How do I change the answer to the field in the contact form and which is even an option? If this is not the case, do you offer a work around? I asked this question on the forum and no one has an answer. Help, please!

  Sonam: Hello, welcome to Adobe

  Sonam: Vicky, is your site hosted by BC, or a 3rd party hoster?

  Vicky Quick: I've got one in British Colombia and the other on godaddy, that both do not work

  Vicky Quick: The contact form, it represents the response return only

  Vicky Quick: Hello?

  Sonam: Vicky, this feature is not available via Muse or BC. Well want to share the link to your post on the forum, I'll pass on the product team and ask them to get back to you as soon as.

  Sonam: If there is a work around, or if it is possible with any customization, the product team must help you with him.

  Vicky Quick: I put it on the forum, but also the sites of third parties such as muse - themes.com and they did not answer either

  Sonam: kindly share the link to your forum post

  Vicky Quick: How to share the link?

  Sonam: copy and paste to this cat

  Anshul suggested, but a case management system, where your customer can respond directly to the depositing e-mail.

  With BC it is possible, allowing the CSE (Customer Service ticket), you can set the responsible role to which users should receive emails of presentation and then respond to customers directly from e-mail client used.

  Level responses may be used as the first level with the level of climbing. Enable this, submitting a form creates a case which will then turn into a case of web and will be triggered in the responsible mailboxes of the role. Users of the site (your client) can directly respond to the customer of any e-mail client used by using this method.

  In case you use an external server, you can use any third-party ticketing system and setting on the email address to which notifications are received.

  Currently, with Muse when the form is configured with e-mail. Depositing submission form receives notification of that email email and authors of the communication is included in the subject line, you can use manually send their responses by e-mail.

  Thank you

  Sanjit

• 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

• The network only on ESX 3.5 host sends me questions

  Hi all

  I'm new to the forum and all the guys here are legends based on the way that a lot of help, I saw given on these forums.

  I am trying to set up the only host on ESX 3.5 connection, the tutorial that I followed was based on vmware workstation but unfortunately I don't have a job, I googled this subject and what I understand, I need to create a new vswitch and add network cards based on this network created on the new vswitch, the vswitch must not be physically connected to any other network.

  I'm not an expert at all and just from VM, but when I create the network under him and vswitch, and then modify a virtual machine host to add the network under the new vswitch card, as soon as the machine starts, an error comes up saying it can't find the driver for a network adapter, a research on the operating system does not find drivers and nothing works.

  When sending responses, please explain as much as possible because I'm not an expert VMware.

  Help, please

  Thanks in advance

  Installation of the VMware Tools in the virtual machine will most likely solve your problem. VMware Tools must be installed, not only for the support of the pilots, but also for e.g. resources and performance management.

  André

• Utilities to host ESX NetApp - questions?

  Hello

  I would like to install this tool on my ESX hosts, but I would ask you if you were having trouble with this tool? I will probably only use for mbrscan/mbralign configuration and nfs, so my setup is not described in their paper (they mention only fc/iscsi), so I guess no error should occur?

  What this SSL connection? is it necessary? For what?

  and these openen installing ports, I can close them down (20,21,23,80,443)? It won't be unexpected problem?

  Thanks in advance for any response.

  We use it to FC/iSCSI environment for multiple access paths and the HBA queue depth. As you use NFS I wouldn't install ESX utilities, because you won't get a lot of them. I have just download and install mbrscan/mbralign.

  David Strebel

  www.Holy-VM.com

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

• Host 11 Quiz questions

  I work in the presenter with PowerPoint 2013 11.  I created a presenter quiz and when the quiz is broken does not work the button continue.  I tried to use the option "go to slide" mentioned in another post to go at the beginning of the quiz and it did not work.  I have a slide after the quiz as well which was a solution mentioned in another thread.  The quiz is set to the attempts of the infinite if failed. Our team has tried everything that we cannot think and cannot get this to work.  Anyone succeeded?

  Thank you!

  Hi Jenni,

  If you remove him and infinite attempts give a high random value, it should meet your requirement because then you have the possibility to redirect the learner to a slide before quiz with the help of the Action that will be triggered on the failure of Quiz.

  Also the other question you asked is not completely clear, but when the learner is complete quiz, if he or she passes the quiz / fails, it will be reported to the LMS if you have enabled the Declaration.

  

  Please mark this answer as correct if you find it useful.

  Thank you

  Zeeshan Hussain

  Adobe Presenter Engineering Team

• VMWare ESXi host AutoDeploy profile questions 5.1

  All,

  Our Organization has just bought a UCS configuration, and we are working to build on the new system. I have scoured the internet looking for a potential solution, but have not found. We get the following operation:

  VM Auto deployment server

  ESXi PXE boot process

  Set of rules that applies the profile of home on the connection with the vCenter

  We are experiencing a problem where when a host is added to the vCenter, the location of the swap of our host profile file does not apply (the swap file is on a data store that is also configured in the profile of the host). In addition, the vNIC for our vSwitches configuration has two network adapters for standby on all 3 vSwitches. The configuration is the following: two vNIC by switch, the expected host profile configuration is set to active, active. Each vNIC for each vSwitch is on a separate side of the UCS fabric (a and b). Cards network to view DHCP addresses assigned in ranges appropriate for all configurations, but the vNIC is intelligence rather than active, active.

  If more information would help to understand this issue, I am happy to provide.

  Thanks in advance.

  Apparently, it's a known issue:

  http://KB.VMware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalID=2055633