Clear and Simple VMware vSAN 6.7 (Virtual SAN)

This lesson introduces valuable resources for learning about VMware vSAN, starting with free hands-on labs on VMware's site, which include beginner and advanced labs for configuring and troubleshooting vSAN environments. It also highlights the VMware vSAN product page as a central hub for documentation, data sheets, licensing information, and system requirements, ideal for understanding vSAN's features and setup needs.

This lesson compares hybrid and all-flash vSAN configurations, explaining that hybrid uses an SSD cache with HDD capacity drives to improve performance cost-effectively, ideal for workloads with consistent data. In contrast, all-flash vSAN replaces HDDs with capacity SSDs, offering superior performance, faster write operations, and support for advanced features like RAID 5/6, deduplication, and compression, which make it increasingly viable as SSD prices decrease.

This lesson explains how vSAN stores virtual machine objects across ESXi hosts for redundancy, detailing object types like VM home namespace, VMDK, swap files, and snapshot deltas. By adjusting the "Primary Failures to Tolerate" (FTT) setting and choosing RAID 1, RAID 5, or RAID 6 configurations, users can balance redundancy and space efficiency, with RAID 5 and RAID 6 offering better space-saving options but only available on all-flash setups.

This lesson reviews vSphere storage policies, particularly for vSAN, which allow administrators to define rules for VM data storage, such as failure tolerance, striping, and space reservation. Specific policies like force provisioning, stripe width, flash read cache reservation, object space reservation, and IOPS limits are discussed, highlighting how each option can optimize storage performance and resource allocation based on workload requirements.

This lesson covers fault domains in vSAN, which enhance data protection by distributing VM components across separate fault domains to withstand hardware failures. By configuring fault domains—whether based on individual hosts or on entire racks in large data centers—administrators ensure that VM data remains accessible even if one domain fails, helping to maintain high availability.

This lesson covers configuring vSAN cluster networking using VMware's Hands-on Labs, ensuring an optimal setup for users to replicate. Key steps include setting up VMkernel ports specifically for vSAN traffic on a vSphere distributed switch, enabling redundancy with multiple physical adapters for resilience, and configuring port groups with NIC teaming for high availability.

In this lesson, you’ll learn how to enable and configure a vSAN cluster, covering initial setup steps such as network validation, selecting a single-site cluster, and claiming disks for cache and capacity tiers. The lesson also includes an overview of configuring fault domains, enabling vSAN health services, and preparing the environment for optimal performance monitoring and iSCSI target options, ensuring your vSAN cluster is ready for virtual machine storage.

This lesson covers the default vSAN storage policy and demonstrates how to create custom policies to tailor vSAN object storage according to specific requirements, such as failure tolerance, RAID level, IOPs limits, and object provisioning. The tutorial includes steps for configuring storage rules, associating policies with VMs or datastores, and verifying compliance with defined storage policies.

This lesson introduces vSAN encryption, which secures data at rest on a vSAN datastore, ensuring that data is encrypted after deduplication to maximize storage efficiency. It also covers the requirements for setting up encryption, such as using a Key Management Server (KMS) and distinguishing between administrator roles, including a special “No Cryptography Administrator” role to limit access to encryption settings.

This lesson covers vSAN’s handling of various failure scenarios, distinguishing between "absent" (temporary) and "degraded" (permanent) conditions. It explains vSAN’s response time for failover and recovery—such as a quick 5-7 second failover and 60-minute delay before rebuilding in absent cases—and highlights resources like the vSAN Troubleshooting Reference Manual for detailed guidance on potential failures and diagnostics.

This lesson explains how vSAN and vSphere High Availability (HA) work together in a cluster, shifting heartbeats from the management network to the vSAN network. This integrated configuration simplifies host isolation scenarios by eliminating separate networks for heartbeats and storage, allowing for a unified response in which isolated VMs are powered off and rebooted on other hosts.

In this lesson, we explore the impact of single and multiple ESXi host failures on a vSAN cluster. Through demonstrations of single host reboots and concurrent host failures, we observe how vSAN handles component accessibility, failover, and potential data rebuilds based on storage policies and available replicas.

In this lesson, we explore various maintenance tasks in a vSAN cluster, including adding an ESXi host to the cluster, configuring VM kernel ports for vSAN traffic, and setting different maintenance mode options (ensuring accessibility versus full data migration). By observing the effects on virtual machine redundancy and data synchronization during maintenance, the lesson highlights best practices for balancing speed with data resilience in cluster management.

In this lesson, we learn how to safely remove a disk from an ESXi host within a vSAN cluster by first evacuating the data on the disk to other hosts to avoid disrupting virtual machine functionality or redundancy. The demonstration shows how to maintain full data integrity and availability for virtual machines by redistributing components across other hosts in the cluster before removing the disk.

In this lesson, we explore the use of a two-node vSAN cluster setup, ideal for remote or small office environments where only two physical ESXi hosts are available. With one host serving as a witness (either as a virtual appliance or physical host) located at the main data center, this configuration enables fault tolerance through a mirrored data setup, ensuring virtual machines continue functioning even if one host fails, while also offering cost-effective connection options, like direct crossover cables, for smaller setups.

This lesson covers the setup and advantages of a stretched vSAN cluster, allowing multiple active vSAN sites with high availability across two main data sites. By mirroring virtual machine data between sites and using a witness at a third location for quorum, this configuration ensures site-level redundancy and enables seamless migration for maintenance, disaster recovery, or data center relocation.