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Monthly Archives: February 2019

apply vs revert

revert and delete checkpoint are absolutely clear…

basically I can quickly test if my thinking about APPLY is correct:

revert will bring a VM to the state after a checkpoint was taking, removing all changes made after.

I understand that Apply save(apply) any changes made after checkpoint creation and it will not be reversible.

Correct?

Then if Delete checkpoint will be made this checkpoint (with Apply) will be merged to VM.


— When you hit a wrong note its the next note that makes it good or bad. — Miles Davis

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Requirements for using Hyper-V

Hello,

I’m new to Hyper-V. I have a .vhdx file which is pretty big 360 GB. I to run it as virtual machine. I tried to convert it to other virtual disk image formats in order to open it in other virtualisation tools, but I could not boot the vm from the converted
image files. It seems that I could directly boot a vm from the .vhdx file. I tried few tutorials to boot enable Hyper-V on my machine but I cannot see Hyper-V Manager if look for it in start-up search. What are the requirements to run Hyper-V. I have Windows
10 64-bit Enterprise running on my laptop. Also is it possible to such a big image to .vdi or .vmdk formats?

Thanks.

 

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Hyper-V VM I/O performance issue between SCSI and IDE VHDs

May I know the max. speed of IDE controller VHD and SCSI controller VHD ?

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Latest 7.6 kernel rpms and hyperv

 We have a redistribute RHEL 7.6 with kernel- and also hypervisor gr_spell gr_inline_cards gr_disable_anim_appear ContextualSpelling" data-gr-id="35" id="35">rpms .

 even when we enable the networking  the system initially pings and then is unable to
ping out.

Feb 27 19:11:38 testmc gr_run_anim ContextualSpelling ins-del multiReplace" data-gr-id="38" id="38">systemd: Stopping System Logging Service…
Feb 27 19:11:38 testmc rsyslogd: [origin software="rsyslogd" swVersion="8.24.0" x-pid="1284" x-info="http://www.rsyslog.com"] exiting on signal 15.
Feb 27 19:11:38 testmc systemd: Starting System Logging Service…
Feb 27 19:11:38 testmc rsyslogd: [origin software="rsyslogd" swVersion="8.24.0" x-pid="7485" x-info="http://www.rsyslog.com"] start
Feb 27 19:11:38 testmc systemd: Started System Logging Service.
Feb 27 19:11:38 testmc gr_run_anim ContextualSpelling ins-del multiReplace" data-gr-id="51" id="51">systemd: Starting CARS data-gr-id="52" id="52">debugd (debug daemon)…
Feb 27 19:11:38 testmc systemd: PID file /run/debugd.pid not readable (yet?) after start.
Feb 27 19:11:38 testmc systemd: Started CARS debugd (debug daemon).
Feb 27 19:11:38 testmc debugd: process 7498 started at Wed Feb 27 19:11:38 2019

Feb 27 19:11:39 testmc gr_run_anim ContextualSpelling ins-del multiReplace" data-gr-id="42" id="42">systemd: Stopping IPv4 firewall with id="43">iptables
Feb 27 19:11:39 testmc iptables.init: iptables: Setting chains to policy ACCEPT: filter [  OK  ]
Feb 27 19:11:39 testmc iptables.init: iptables: Flushing firewall rules: [  OK  ]
Feb 27 19:11:39 testmc cdpd: debugd seems to have crashed, abandoning it

Feb 27 19:13:09 testmc gr_run_anim ContextualSpelling ins-del multiReplace" data-gr-id="54" id="54">systemd: iptables.service
stopping timed out. Terminating.
Feb 27 19:13:09 testmc iptables.init: iptables: Unloading modules:
Feb 27 19:14:39 testmc systemd: iptables.service stop-final-sigterm timed out. Killing.
Feb 27 19:15:01 testmc systemd-logind: Failed to create /run/user: File exists
Feb 27 19:16:09 testmc systemd: iptables.service still around after final SIGKILL. Entering failed mode.
Feb 27 19:16:09 testmc systemd: Unit iptables.service entered failed state.
Feb 27 19:16:09 testmc systemd: iptables.service failed.
Feb 27 19:16:09 testmc gr_run_anim ContextualSpelling ins-del multiReplace" data-gr-id="45" id="45">systemd: Starting IPv4 firewall with id="46">iptables
Feb 27 19:16:10 testmc gr_run_anim ContextualSpelling ins-del multiReplace" data-gr-id="48" id="48">systemd: Started IPv4 firewall with id="49">iptables.
Feb 27 19:16:10 testmc NCS: Starting NCS: #033[?25l#033[?1c
Feb 27 19:16:13 testmc kernel: INFO: task modprobe:9468 blocked for more than 120 seconds.
Feb 27 19:16:13 testmc kernel: "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
Feb 27 19:16:13 testmc kernel: modprobe        D ffff90e954b58000     0  9468   9466 0x00000080
Feb 27 19:16:13 testmc kernel: Call Trace:
Feb 27 19:16:13 testmc kernel: [] schedule_preempt_disabled+0x29/0x70
Feb 27 19:16:13 testmc kernel: [] __mutex_lock_slowpath+0xc7/0x1d0
Feb 27 19:16:13 testmc kernel: [] ? 0xffffffffc049afff
Feb 27 19:16:13 testmc kernel: [] mutex_lock+0x1f/0x2f
Feb 27 19:16:13 testmc kernel: [] register_pernet_subsys+0x19/0x40
Feb 27 19:16:13 testmc kernel: [] ip_tables_init+0x11/0x1000 [ip_tables]
Feb 27 19:16:13 testmc kernel: [] do_one_initcall+0xba/0x240
Feb 27 19:16:13 testmc kernel: [] load_module+0x272c/0x2bc0
Feb 27 19:16:13 testmc kernel: [] ? ddebug_proc_write+0x100/0x100
Feb 27 19:16:13 testmc kernel: [] SyS_init_module+0xef/0x140
Feb 27 19:16:13 testmc kernel: [] system_call_fastpath+0x22/0x27

I goto the hyperV manager and change the networking to disable and enable the network adapter and  everything
starts working.

Any clues as to what rpm I may be missing or config to fix this and automatically get my network adapter up.

on the REHL7.5 version of the kernel along with  open-vm-tools - everything
works fine , I ins-del multiReplace" data-gr-id="394" id="394">dont have the hyper* rpms 

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deleting checkpoints Hyper-v windows server 2016

to give a bit of background we have a 2016 server hosting a windows 2008 VM

Someone created a checkpoint or windows server backup did, not too sure as to the initial cause.

The hard drive started to fill up with .avhdx files.

due to limited space we moved 2 of the storage disks for the VM to another drive and manually merged the .vhdx files back to the parents.

they are all now merged back and vm working fine. however the checkpoint is still showing in the hyper-v management interface and subsequesnt backups have started to create avhdx files.

Now the question, should i run Get-VM -name | remove-vmsnapshot to remove the checkpoints or are there other options

thanks in advance

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Host 2019 standard, 2 VM’s with 2016 – cannot activate? 0xC004FD03

Hi!

I am having problems with activation of two virtual machines… virtual machines are installed from downloaded 2016 evaluation iso.

host server is 2019 stardard (activated)

I am getting 0xC004FD03 error.

I used AVMA key (for 2016 standard)
C3RCX-M6NRP-6CXC9-TW2F2-4RHYD

I also tried this : https://victorhomocea.wordpress.com/2016/12/27/this-edition-cannot-be-upgraded-how-to-activate-windows-server-2016-evaluation/

any hints?

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Hyper-v & threadripper temp issues

I have a threadripper 1950x and had hyper-v installed to run a few vms but have run into an odd issue and am curious if anyone else has run into it as well, and if there is a fix.

So the issue is, when hyper-v is installed, my liquid cooler (kraken x62) cannot seem to read the temps properly from the cpu. My cam software should scale up fan speed and pump speed based on this reading, but it doesnt. When I uninstall hyper-v everything
runs fine and scales as it should.

I also tried running the ryzen master utility while hyper-v was installed but it cannot run due to VBS and requests that you disable VBS before running it again.

If anyone has run into this and knows whether or not there is a solution please let me know as I would like to run a few vms but am currently worried about my processor overheating.

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NUMA SQL SERVER

Hello guys

I would definitely understand the subject WE NUMA in the configuration of a VM for SQL Server.

I currently have a Host with Windows Server 2016, dedicated as a Hyper-V Host with 64 GB Ram, 2-socket processor, 12-core processor and 24 logical processors.

I have already done several readings about NUMA Nodes configuration, and it seems to me that Windows Server does not know how to manage this, and that we must take care not
to cross the limit of a node in one, so that it does not have to use external memory.

And there I have read many comments and magical formulas to be able to do accounts and decide this.

I honestly can not understand the account, I do not know if windows does not know how to manage it.

And in all the confusion in this matter I have made available a VM for SQL Server 2014, with 20 GB and 9 processors, because in the NUMA configuration it speaks up to 12 CPUs
per node.

Sorry for the long post, but if anyone can explain this please and if my settings are correct

Thank you

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Isolate Hyper-v guest for safe browsing

Hi,

I’m trying to create a safe browsing environment for all the online activity I’d like to isolate from my personal information and be safe from malware. As far as I know it’s possible by using a hyper-v guest for browsing sites I don’t want to be able to
see my personal information. For example I use my physical computer (equipped with antivirus protection) for logging into my bank account and other official stuff. I don’t want other sites like facebook, webshops or non-safe websites to track my personal data
so I’d like to browse these sites in an isolated environment. I’m not looking for a way to hide from authorities. I don’t even think it would be possible… So please, don’t suggest Tor and other solutions like that. I’m just looking for a way to hide from
those sites abusing my personal information by following me everywhere. Also it would be my first line of defense against malware activity when browsing/downloading stuff that’s not entirely safe or testing/trying applications that are not yet proven to be
safe. So my question is if you could give me a list of settings I should use in hyper-v to completely (or as much as possible) isolate my guest OS from the host so there’d be no information leaking.

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VM showing stuck

I am using windows Server 2012 R2 stranded in host server (Base SErver). and i create two vm in hyper-v.

Suddenly VM has been stuck any time not specific time.

My VM H/W configuration is 

RAM :- 12 GB

Virtual Processor :- 8

when i checked in event logs they showing me error:-

Error :-The computer has rebooted from a bugcheck.  The bugcheck was: 0x00000050 (0xffffe000e85fd000, 0x0000000000000001, 0xfffff801ca5ad360, 0x0000000000000000). A dump was saved in: C:WindowsMEMORY.DMP. Report Id:
022519-12578-01.

please share with me your output for how to resolve this issue.

 

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