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16

Having recently gone through the same song and dance with my own management ("VMWare is really expensive! Check out what OSS options there are out there.") I have some observations to share. I/O performance does vary by hypervisor, though CPU performance is much less variant. In general, 'thin' provisioning is a great way to dock I/O performance. Some ...


10

Yes, you can change the type. Use the Set-NetworkAdapter powercli cmdlet. The "Type" switch allows you to modify adapter. Note that the VM has to be turned off to do this. https://www.vmware.com/support/developer/PowerCLI/PowerCLI41U1/html/Set-NetworkAdapter.html vSphere PowerCLI can be downloaded here: ...


10

The host can only be managed by one vCenter at a time. But you can move hosts to new vCenters in this manner without disrupting the virtual machines.


8

I'm a big fan of keeping management infrastructure out of band of the infrastructure under management. This means that if I have an ESX cluster, I want the database server and the Virtual Center server physical, or at least in a completely different VM environment than what it's running. When things go deeply pear-shaped, not being able to get into the ...


8

1) Your VM's will all continue to work if vCenter crashes, however you will lose the most of the functionality vCenter provides - so no live migrations, however HA will still work. This is because vCenter is required to configure HA, but it sets it up so that it is not required for it to function. In practice we've found that removing vCenter primarily ...


8

By rights, the full process would be: Create a snapshot of the running machine; this frees up the underlying disk files and causes new data changes to be written to delta files Copy the main disk files to the new machine Create another snapshot of the running machine; this frees up the delta files and causes new data changes to be written to new delta ...


7

That list is stored in a Registry key: HKEY_CURRENT_USER\Software\VMware\VMware Infrastructure Client\Preferences\RecentConnections. http://kb.vmware.com/selfservice/microsites/search.do?cmd=displayKC&externalId=1032988


7

There doesn't seem to be a clean way to fully manage a cold start of a virtual infrastructure once HA is configured on the individual hosts. Enabling HA and DRS seems to disable the Virtual Machine Startup and Shutdown options on the host servers. However, any ordering set before the host is moved into the cluster seems to stick. If the number of hosts is ...


7

You must upgrade vCenter to 5.1 in order to add a host with ESXi 5.1. No vCenter version prior to 5.1 supports ESXi 5.1. References Add an ESXI 5.1 host in vcenter server 5.0 [VMWare Communities] VMWare Product Interoperability Matrix [VMWare Compatibility Guide]


7

Nope... Your scenario won't work. You will need vCenter Standard to manage more than three hosts. If you attempt to license the Essentials Plus hosts under vCenter Standard, you will receive an error like this: You have a couple of options before resorting to a keygen, though 🐼. You can look into converting your existing Essentials Plus licenses to ...


7

They can help with replication but they need DB quiecing support, otherwise you'll inherently get data corruption. In my experience it's always far better to get the DB engine itself to do the work - they're designed to do just that.


7

If you are ABSOLUTELY CERTAIN the .vmdk files are not being used anywhere else you should be able to safely delete them. I would suggest archiving them (copy them to some other system) first. Sometimes even when you're "absolutely certain" you're wrong and things break. It's useful to be able to restore the files in such cases.


7

We have over 100 separate vCenters and every one of them is a VM, it means we get all the usual virtualisation benefits and because we run them on a specific management cluster in the event of one crashing or whatever we can just connect directly to the host they're running on and restart or whatever as needed. We're something like the 4th or 5th biggest ...


7

VMware best practice now is to install vCenter on a VM with HA. That's from a VMware training class when 5 originally came out. HA doesn't require vCenter to actually be working once set up, as the hosts know what to do. I have Essentials Plus, use this setup, and can attest that it works well for us. Just make sure that you have enough capacity on your ...


7

You can do this by logging into the host that vCenter is running on directly. Log into the host directly with the standalone console Shut down the vCenter VM Make changes (including deleting the floppy drive) Boot VM Log into VM and expand the disk Profit


7

Delete any outstanding snapshots of the vCenter VM, then you should be able to resize the disk while the VM is running.


7

Sounds like a job for PowerCLI! Well, from a Windows workstation, anyway, which is what I have. Get-Snapshot The Surly Admin's blog even has a script that you can copy-pasta to get all the snapshots for all the VMs in your environment, the meat of which I'll post below for your convenience. $Report = Get-VM | Get-Snapshot | Select ...


6

I haven't used it myself but there is Proxmox-VE. According to Hak5, it supports a variety of OS's including Windows. It also supports clustering


6

99% of the time it's because the power saving features of the underlying OS has suspended or hibernated the machine. We have this issue with our development testing virtual machines. A quick GPO deployment fixed this, but if you don't have a GPO, just go into each VM and tell it not to hibernate or suspend after inactivity. The biggest giveaway is this ...


6

HA's admission control uses something called "slots" for calculating whether there's room available to accommodate all VMs in the event of the configured number of hosts failing. The slot calculation is what is allowing you to continue powering up VMs even as the memory resources in the cluster start to look dire. Admission Control and Slots The "slot" ...


6

What you're talking about is called "hot-cloning," and doing such a clone will result in some level of inconsistency between the two copies. Every way I'm aware of, including the commercial and native implementations of hot-cloning involve taking a snapshot (in one form or another) and then cloning that. This freezes the disk at a certain point in time, so ...


6

You're partly right, except HA doesn't use vMotion - it simply restarts the VM on the pre-arranged host (if it's available). My environment is far from small, we have many 24-32 host clusters, and we use this exact method for our various VCentres - it just works fine, although we use the 'full' MSSQL in cluster mode on a number of physical Windows boxes for ...


6

If you're not using DRS then you'll have to manually evacuate your powered on VM's to another host in the cluster before VUM will remediate the host. It's also recommended that if you're using HA Admission Control, Distributed Power Management or Fault Tolerance that you disable those features before you remediate the host. In short, migrate (vMotion) your ...


6

This question depends heavily upon your VMware vSphere licensing tier..., the applications and VMs you intend to run and the amount of storage space and performance profile you need. Answer that first, as an organization that can afford to properly license ten ESXi hosts in a vSphere cluster should be prepared for a higher-end storage solution and ...


6

Hope this will be a little bit of help. Sorry, was quick so you would want to do additional sorts in this info output, as well as grouping by resources(host, datastore, cluster), I ran against the whole vCenter. #!/bin/env python __author__ = 'dladner' import os import sys import pysphere from pysphere import VIServer, MORTypes from pysphere.resources ...


6

I would rather recommend you to keep an eye on the fact whether a partition is so-called I/O aligned as this may really affect I/O performance. Nowadays, it's not such issue as installers or configuration wizards usually align partitions automatically on some "power of 2" boundary but when you create it by hand it may be still useful to know how it works. I ...


5

Our vCenter install is on a Windows Server 2008 machine that is not connected to a domain. Works perfectly. I installed it as the local Administrator, so logged in via vShpere Client with that account. Then I was able to create a permission structure and users. It does require a database server, so I'm running SQL Server Express on the same host, which is ...


5

I have read into vCenter and wondered if there would be any benefit in using it in such a small setup? Yes, it is very helpful, even in small environments. One of the huge benefits you'll get by running you servers within VMware is that you're no longer tied to a specific piece of hardware. If your ESXi server croaks, you can easily move the files ...


5

There's no reason why not. I'm not aware if VMware specifically direct you to run vCenter on either physical or virtualised hardware, I believe it's supported on both. Depending on what sorts of failures you're trying to protect against, it's usually a good idea to separate your redundant / standby instances from the primary / live instances as much as ...


5

It's not available for download yet and we don't deal with unreleased code on serverfault. Come back, or better yet read the documentation, once it's released rather than announced. That said basically you just upgrade your VC and hosts to 5.1 and deploy the VDP .ovf like you did for VDR, the process is the same.



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