How i can make sure that when my physical machine shuts down it will suspend the VM Workstation machine. Basically my UPS is giving few minutes backup and then turns my Physical off when critical battery level is reach.
Where as some times i am not on seat and all open Workstation machines works get lost because they are not suspended by turned of during battery failure sundown. I need that when my physical machine is being showdown the running machines becomes suspended that showdown.
I saw a post with the same function be applied using SM Hyper-V but i am using VM WorkStation 15.5.5
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I am working on a application which cloned virtual machines from a running machine on a specific event in poweredon state. The machines later communicate each other based on event and I have to fetch out (sniff) the network packets through netmon virtual machine which is routed between them but I can't do so directly, I have to reboot the guest on virtual machines manually and then I can access the network reports.
I also tried to rebootguest of vm using pyvmomi but the machine guest will take too much time to be in initial state after boot, I also do poll in loop to check virtual machine guest tool status and network status as well but nothing work, I got the empty network reports.
I did some research and found this is the right place to post this question, please let me know I am in wrong direction.
I am looking for the VM Monitoring functionality in vsphere 6.0, I have followed some instruction found, but after all required steps to enable this functionality I don't know why I don't see the expected behavior:
"On" vSphere HA
Installed VMWare tools on guest environment
start VM
/etc/init.d/vmware-tools I have stopped the service <- so from now no Heartbeats are sent to Host machine
BUT Nothing happened.. What I expected here was a restart of VM.
What am I wronging?
Even If VM Monitoring is based also on VM's disk/network I/O I have used fork bomb, but nothing happened..
Below my configuration
Tks guys
Prisco
I think FORK bomb will increase the computation not the freeze the Disk I/O or network drops.Try to stop the disk I/O and network I/O in the VM level.Hope that will be restart your machine.The VMware has build an intelligence to avoid the false restart trigger.
Refer Duncan's Blog more about the VM monitoring.
http://ha.yellow-bricks.com/vm_and_application_monitoring.html
I want to understand what happens under the hood in a live migration for execution of my final year project
According to my understanding ,with two host sharing a common storage via SAN
1)When a vm is migrated from one host to another host,the VM files are transferred from one ESXI to another ,but the question is they have a shared storage so how are they going to transfer.
2)VMDK,snapshots files are transferred during live migration
Now I have questions
1)Only VMDK,.vmx files are transferred
2)with VMotion the memory pages are transferred,so what are this memory pages,are they files ,or what are they physically
3)Where is the code for migration present,in hypervisor or VCenter
4)Can we get a stacktrace for vm ,hypervisor during a migration and if yes how would that be possible (I tried a strace to get a basic on how a VM (ubuntu) would call a hypervisor but that only gives me till the linux system and not beyond that )
Can anyone please guide me on this .
VMotion overview
Phase 1: Guest Trace Phase
The guest VM is staged for migration during this phase. Traces are
placed on the guest memory pages to track any modifications by the
guest during the migration. Tracing all of the memory can cause a
brief, noticeable drop in workload throughput. The impact is generally
proportional to the overall size of guest memory.
Phase 2: Precopy Phase
Because the virtual machine continues to run and actively modify its
memory state on the source host during this phase, the memory contents
of the virtual machine are copied from the source vSphere host to the
destination vSphere host in an iterative process. The first iteration
copies all of the memory. Subsequent iterations copy only the memory
pages that were modified during the previous iteration. The number of
precopy iterations and the number of memory pages copied during each
iteration depend on how actively the memory is changed on the source
vSphere host, due to the guest’s ongoing operations. The bulk of
vMotion network transfer is done during this phase—without taking any
significant number of CPU cycles directly from the guest. One would
still observe an impact on guest performance, because the write trace
fires during the precopy phase will cause a slight slowdown in page
writes.
Phase 3: Switchover Phase
During this final phase, the virtual machine is momentarily
quiesced on the source vSphere host, the last set of memory
changes are copied to the target vSphere host, and the virtual
machine is resumed on the target vSphere host. The guest briefly
pauses processing during this step. Although the duration of this
phase is generally less than a second, it is the most likely phase
where the largest impact on guest performance (an abrupt, temporary
increase of latency) is observed. The impact depends on a variety of
factors not limited to but including network infrastructure, shared
storage configuration, host hardware, vSphere version, and dynamic
guest workload.
From my experience, I would say I am always loosing at least 1 ping during Phase 3.
Regarding your questions:
1) All data is transferred over TCP/IP network. NO .vmdk is transferred unless it's Storage VMotion. All details you can find in the documentation
2) .nvram is VMware VM memory file. All the list of VMware VM file types can be validated here
3) All the logic is in hypervisor. vSphere Client/ vCenter are management products. VMware has proprietary code base, so I don't think you can get actual source code. At the same time, you are welcome to check ESXi cli documentation. VMotion invokation due to licensing restrictions can be done only via client.
4) Guest OS (in your case Ubuntu) is not aware of the fact the it uses virtual hardware at all. There is NO way for guest OS to track migration or any other VMware kernel/vmfs activity in general.
I have a environment where I have a huge pool of machines (60 thus far en growing each day), now these machines are used in a testing environment and machines do not need to be online around the clock as were paying for CPU time so I want to create a system where our users can turn on machines without having to logon through either vSphere desktop client or the vSphere site. Now i know there are systems such as plesk and similar but these are way over the top of what we need for an internal system.
Are there any API for VMWare that lets me remotely turn on virtual machines on demand?
We are running ESXi 5.1.0 on our hosts.
Two RAID volumes, VMware kernel/console running on a RAID1, vmdks live on a RAID5. Entering a login at the console just results in SCSI errors, no password prompt. Praise be, the VMs are actually still running. We're thinking, though, that upon reboot the kernel may not start again and the VMs will be down.
We have database and disk backups of the VMs, but not backups of the vmdks themselves.
What are my options?
Our current best idea is
Use VMware Converter to create live vmdks from the running VMs, as if it was a P2V migration.
Reboot host server and run RAID diagnostics, figure out what in the "h" happened
Attempt to start ESX again, possibly after rebuilding its RAID volume
Possibly have to re-install ESX on its volume and re-attach VMs
If that doesn't work, attach the "live" vmdks created in step 1 to a different VM host.
It was the backplane. Both drives of the RAID1 and one drive of the RAID5 were inaccessible. Incredibly, the VMware hypervisor continued to run for three days from memory with no access to its host disk, keeping the VMs it managed alive.
At step 3 above we diagnosed the hardware problem and replaced the RAID controller, cables, and backplane. After restart, we re-initialized the RAID by instructing the controller to query the drives for their configurations. Both were degraded and both were repaired successfully.
At step 4, it was not necessary to reinstall ESX; although, at bootup, it did not want to register the VMs. We had to dig up some buried management stuff to instruct the kernel to resignature the VMs. (Search VM docs for "resignature.")
I believe that our fallback plan would have worked, the VMware Converter images of the VMs that were running "orphaned" were tested and ran fine with no data loss. I highly recommend performing a VMware Converter imaging of any VM that gets into this state, after shutting down as many services as possible and getting the VM into as read-only a state as possible. Loading a vmdk either elsewhere or on the original host as a repair is usually going to be WAY faster than rebuilding a server from the ground up with backups.