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Virtual Geek

Tales from real IT system administrators world and non-production environment

Blog posts : "vCenter Server"

How to convert RDM disk (Raw Device Mapping) to VMDK

In my previous article I shown Adding and sharing RDM disk to multiple VMs in VMware step by step, I received one related task to convert virtual machine RDM (Raw device mapping) hard disk to VMDK disk. Basically I require it to convert because, I was not going to use microsoft clustering anymore, a…

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Powercli GUI: Determine the EVC Mode that vmware cluster should be configured

vmware vsphere esxi cluster, enhanced vmotion mode evc, cpu manufacturer, cpu generations, failover, drs, ha, vmware high availibility, distributed resource scheduler

I was evaluating one of the old project hosted on VMware in my office for a client, After ruff capacity calculation I found scarce of compute and memory resources in the VMware clusters. Few meetings and decisions, and sharing complete excel data and capacity planning for upcoming VMs, we decide…

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Create and configure VMWare vSphere VSAN cluster step by step

VMware vSAN is a Hyper-Converged storage (Software Defined Storage) solutions with a vSphere-native, high-performance architecture. With software defined storage, it has opened new opportunities to new skills. With vSAN we can use local disk and create highly available, scalable, high performance da…

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Configuring a vCenter PSC Single sign-on Active directory Integrated windows authentication

In my one of the earlier article I shown ADDING AND CONFIGURING VMWARE VSPHERE VCENTER SSO ACTIVE DIRECTORY AS LDAP SERVER, That was one of the security best practices, Here I am going to perform the same task but will use Active directory integrated windows authentication way instead. For this fe…

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Reset ESXi root password using Host Profiles on vCenter server: VMWare vSphere Web client

Recently I got assigned one of the VMware project, while taking handover I found esxi root passwords are not documented properly for the VMware infrastructure project, Luckily 40% Esxi host were joined into domain and I was able to reset password using Reset forgotten ESXi root password on Domain…

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The top 10 reasons to upgrade to VMware vSphere 6.5

1. Reorganize Administration and Management with a New and modern HTML5-Based User Interface 
Administer and manage the virtual data center with the responsive, easy-to-use new HTML5-based vSphere client interface. Although I am still big fan of vsphere client, As new versions of vsphere will be k…

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Unmount NFS datastores from VMware ESXi and NFS is in use

Mounting NFS datastore on ESXi server is very easy, similar way you might need to remove/unmount NFS share from ESXi server for maintenance or migration purpose. To unmount it, open VMWare vSphere Web Client and select Storage tab, from the list select NFS datastore, right click on it and sele…

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Mount NFS share to multiple ESXi hosts

"A datastore with the same name and backing configuration already exists in the current datacenter. Change the datastore name and backing configuration to continue."

While adding NFS datastore on esxi server I saw above error. This NFS drive was already added on the Esxi001 successfully, but when…

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Part 4: Remove ESXi Host from Distributed switch and migrate to virtual switch completely

This is last and final part of this article series from migrating distributed switch to standard switch. In this series I have already created and copied existing dvswitch and its portgroup to new standard switch, then migrated Management network and vMotion VMkernel virtual network adapter to stand…

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Migrating move back from Distributed virtual switch to Standard virtual switch - VMs (Virtual Machine) - Part 3

In my earlier article after moving all VMkernel network adapters from dvswitch to sswitch, In this part I will be migrating Virtual Machine's network adapter from DvSwitch PortGroups to respective Standard vSwtich PortGroup. This is a one of the crucial stage and gather PortGroup Network information…

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Migrating move back from Distributed virtual switch to Standard virtual switch - VMKernal Adapter - Part 2

In this article I will be migrating VMKernel virtual adpaters from distributed virtual switches to standard virtual switch, in earlier article I addressed Copy or clone distributed virtual switch portgroups to standard switch portgroups - Powercli, this helps automating, creating Portgroup. Here I…

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VMware hot-extend was invoked with size is not supported: Virtual Machine HDD VMDK

Last day I received some critical tasks on production to increase Virtual Machine Hard disk VMDK size, on around 200 vms. For 99.99% I have my own VMWare PowerCLI scripts repository to automate my tasks to complete it before time. While running script I was getting errors, To further troubleshoot I …

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VMWare Web Client: Datastore browse files upload copy failed error

While uploading files on vcenter esxi datastores using vSphere web client I met with below failed error. And went with the VMware KB article provided in the error box.

vmware vsphere the operation filed for an undetermined reason. certificates, datastore file copy upload errorThe operation failed for an undetermined reason. Typically this problem occurs due to certificates that the browser does not tru…

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Enable or disable SSH on VMWare vCenter Server Appliance (VCSA)

Keeping disabled SSH service in VMWare Environment is a best practices, specially on Esxi server and VCSA appliance. Use only when required to reduce any attack surface, this might be your information security who ask you to implement SSH related settings. For Esxi to change settings follow my earli…

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Deploy install VCSA (vCenter server appliance 6.5) on VMWare Workstation

VMware plans to deprecate vCenter Server for Windows with the next numbered release (not update release) of vSphere.  The next version of vSphere will be the terminal release for which vCenter Server for Windows will be available. For more info check on Farewell, vCenter Server for Windows. I had…

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VMWARE VCENTER STORAGE MIGRATE/SVMOTION VM AND PORT BINDING MULTIPATHING TESTING

VMWARE ESXI INSTALL AND CONFIGURE SOFTWARE ISCSI STORAGE ADAPTER FOR VMFS VERSION 6 DATASTORE

VMWARE ESXI CONFIGURE (VSWITCH) VMKERNEL NETWORK PORT FOR ISCSI STORAGE

VSPHERE UPDATE MANAGER 6.5 UPGRADE AND VSPHERE WEB CLIENT PLUG-IN INTEGRATION

After worked on first step of upgrading my VMware vCenter Server from 6.0 to version 6.5, I can upgrade other vsphere component one by one. Whenever I want to upgrade my production or lab vSphere environment (This is recommended practice), I always first upgrade (database), vCenter Server, and secon…

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UPGRADING FROM VMWARE VCENTER 6.0 TO 6.5 PROCEDURE AND VSPHERE HTML5 WEB CLIENT

Recently VMWare has announced vSphere 6.5 product suite GA (General availability). There are tones of new features included in new version of vSphere 6.5 suite, Here I will be testing one of the inbuilt new feature vSphere HTML5 web client first, Although for earlier version this was separate ova ap…

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