Category: Virtualization
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VM Replication with vSphere Replication and Site Recovery Manager
Reading Time: 6 minutesVM Replication with vSphere Replication and Site Recovery Manager shows a possible scenario for using vSphere Replication and Site Recovery Manager (SRM) to replicate and manage virtual machines. Our scenario is based on a lab topology, as shown in the following picture: The “Main Site” is the active site, where all production…
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Changing DNS Settings on ESXi Hosts
Reading Time: 3 minutesChanging DNS Settings on ESXi Hosts is an article that shows an automated approach to changing the DNS configurations on all connected ESXi hosts under the same vCenter Server, using a Python script. The idea is to use a Linux CentOS 9 as a script server. We’ll execute a Python script from this…
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Changing NTP Settings on ESXi Hosts
Reading Time: 2 minutesChanging NTP Settings on ESXi Hosts is an article that shows an automated approach to changing the NTP client configurations on all connected ESXi hosts under the same vCenter Server, using a Python script. The idea is to use a Linux CentOS 9 as a script server. We’ll execute a Python script…
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Upgrading VMware Tools on ESXi Hosts
Reading Time: 3 minutesUpgrading VMware Tools on ESXi hosts is an article that shows an automated approach to upgrading the VMware Tools version on an ESXi host, using a Python script. The idea is to use a Linux CentOS 9 as a script server. We’ll execute a Python script from this server to connect to…
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vCenter Reduced Downtime Upgrade
Reading Time: 5 minutesvCenter Reduced Downtime Upgrade shows how to perform a vCenter Server upgrade with reduced downtime. First and foremost, what is the Reduced Downtime Upgrade? Reduced downtime upgrade (RDU) is a migration-based approach to upgrade vCenter Server between major and minor versions that reduces downtime to less than 5 minutes under ideal network, CPU,…
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How can I use NAT on NSX-T?
Reading Time: 5 minutesIn this article, we’ll show you an example of how to use NAT on NSX-T. First and foremost, what is NAT? NAT is an acronym for Network Address Translation and acts as a translator of IP addresses – an example of NAT usage in providing Internet access to internal devices. In this…
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Recover ESXi Host Network
Reading Time: 6 minutesRecover ESXi Host Network shows all the necessary steps to recover an ESXi management network when connected to a vSphere Distributed Switch (VDS). First things first: Describing the Scenario So, in this example, we have a four-node vSAN cluster, and the first ESXi host, for some reason (wrong configuration such as VLAN…
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Changing the Hostname on a Production vCenter Server
Reading Time: 6 minutesChanging the Hostname on a Production vCenter Server shows all the steps I have used to change the vCenter Server hostname. Disclaimer: All steps shown here were performed in a lab environment. Before applying them to your environment, make sure to understand everything and, if possible, replicate them in a lab or…
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MTU, VDS, and VMkernel: The relation among them
Reading Time: 4 minutesA friend asked me to help solve an issue related to an entire vSAN cluster going down after changing MTU values. Because this subject can sometimes seem complex and confusing, I created this simple post to explain it. What is the issue? Let’s explain it. The vSAN cluster is a standard cluster…
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Getting Useful vSAN Details with PowerCLI
Reading Time: 4 minutesGetting Useful vSAN Details with PowerCLI aims to get useful vSAN details or information in a vSAN-enabled cluster. Powershell is a powerful tool embedded in the majority of Windows installations. VMware PowerCLI is a command-line and scripting tool built on Windows PowerShell. It provides more than 800 cmdlets for managing and automating VMware vSphere,…
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Checking Thick-Provisioned Disks with PowerCLI in a vSAN Cluster
Reading Time: 4 minutesChecking Thick-Provisioned Disks with PowerCLI in a vSAN Cluster aims to show thick-provisioned disks using the PowerCLI. First and Foremost, What are Thin-Provisioned and Thick-Provisioned Disks? A thin-provisioned disk is a virtual disk that allocates storage space as needed. Initially, it appears as if the full disk size is available, but it…
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What is vSphere vMotion?
Reading Time: 6 minutes“What is vSphere vMotion?” is an article that explains vSphere vMotion and provides some important details about this process. About VM Migration Migration means moving a Virtual Machine (VM) from one ESXi host, datastore, or vCenter Server instance to another ESXi host, datastore, or vCenter Server instance. In this context, a migration…