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ESXi Host Configuration Backup and Restore with PowerCLI and ESXCLI: Saving Your Virtualization Cluster During Outages

By IT From Zero October 26, 2026

A step-by-step guide to backing up and restoring ESXi host configurations using ESXCLI and PowerCLI. Learn how to recover failed hosts in 10-15 minutes during hardware outages.

VMware

VMware Auto Deploy Configuration Guide: Diskless ESXi Deployment via PXE

By IT From Zero October 4, 2026

A comprehensive guide to VMware Auto Deploy: Boot diskless ESXi hosts over PXE, configure Stateless Caching for resilience, and handle production boot storms.

VMware

Configuring VM-Host and VM-VM Anti-Affinity Rules on VMware vSphere: Avoiding the Half-Baked High Availability Trap

By IT From Zero October 2, 2026

Running paired VMs for redundancy, yet a single ESXi host failure took down your entire service? Learn how to configure VM-VM and VM-Host Anti-Affinity Rules on vSphere to avoid bad placement traps.

VMware

VMware vSphere 8 Live Patching: Update ESXi Hosts Without Maintenance Mode or vMotion

By IT From Zero September 1, 2026

VMware vSphere 8 Live Patching lets you update ESXi hosts without Maintenance Mode or VM migration, cutting patch time from hours down to minutes. This guide walks through the full process using PowerCLI and esxcli, with practical insights from a real 8-host cluster.

VMware

Configuring vSphere Proactive HA: Automatically Migrate VMs Before Hardware Failure

By IT From Zero September 1, 2026

Proactive HA is a vSphere feature that automatically vMotions VMs before hardware completely fails, based on alerts from Dell OMIVV or HPE OneView. This guide covers step-by-step configuration with PowerCLI scripts, drawn from real-world experience managing an 8-host ESXi cluster.

VMware

Configuring VMware vCenter Centralized Authentication with Google Workspace via OIDC: Replacing LDAP and Active Directory

By IT From Zero August 29, 2026

Step-by-step guide to centralized VMware vCenter authentication with Google Workspace OIDC — no LDAP or Active Directory required. Covers OAuth 2.0 Client setup, Identity Provider configuration in vCenter, user permission assignment, and real-world best practices from operating an 8-node ESXi cluster.

VMware

Configuring Private VLAN (PVLAN) on VMware vSphere: Network Traffic Isolation for VMs on the Same Subnet

By IT From Zero July 15, 2026

Private VLAN (PVLAN) on VMware vSphere lets you isolate traffic between virtual machines on the same subnet without creating additional VLANs or changing any IP configuration. This guide covers the full setup: declaring Primary/Secondary VLANs on a Distributed Switch, creating Port Groups, assigning VMs, and verifying isolation with ping and PowerCLI.

VMware

Configuring vSphere Alarms and Email Notifications: Automated SysAdmin Alerts When ESXi CPU, RAM, and Datastore Exceed Thresholds

By IT From Zero July 1, 2026

A comparison of three ESXi monitoring approaches (native alarms, Zabbix, PowerCLI) and a practical walkthrough for deploying vSphere Alarms to automatically email SysAdmins when CPU, RAM, or Datastore usage hits dangerous thresholds. Step-by-step from SMTP configuration to fine-tuning thresholds to avoid alert fatigue.

VMware

Handling APD and PDL Errors in VMware vSphere: Understanding and Resolving All Paths Down and Permanent Device Loss

By IT From Zero June 28, 2026

APD and PDL are two types of serious storage failures in VMware vSphere that present with similar symptoms but require completely different remediation approaches. This article walks through how to distinguish, diagnose, and resolve each condition using CLI and PowerCLI — based on real-world experience managing an 8-host ESXi cluster.

VMware

How to Configure VMware vSphere DPM: Automatically Power ESXi Hosts On/Off to Save Datacenter Energy

By IT From Zero June 26, 2026

VMware vSphere DPM automatically migrates VMs and shuts down unnecessary ESXi hosts when cluster load is low, then powers them back on via Wake-on-LAN or IPMI when needed — saving 30–50% of datacenter power consumption. This guide walks through configuring DPM step by step via vSphere Client and PowerCLI, including monitoring and practical tips for production deployments.