The "vSAN 6.6 RVC Guide" series explains how to manage your VMware Virtual SAN environment with the Ruby vSphere Console. RVC is an interactive command line tool to control and automate your platform. If you are new to RVC, make sure to read the Getting Started with Ruby vSphere Console Guide. All commands are from the latest vSAN 6.6 version. Feb 20, 2020 · Planned Maintenance: Replace Amazon EC2 instances and vSAN witness virtual machines (VMs) that are scheduled for retirement. Dynamic Scalability: Scale the SDDC up or down dynamically based on resource usage. You can read more about this in my Elastic DRS blog post.
May 15, 2018 · A vSAN witness node appliance, which looks like an ESXi host, will automatically be provisioned. It resides outside the SDDC cluster and in a third AWS availability zone. The vSAN witness node appliance is required in case network communication is lost, assisting to avoid split brain for virtual machines across AWS availability zones. Mar 10, 2017 · In this case there is an inter-dependency between the 2-node vSAN deployments at each of the remote sites, as each site hosts the witness of the other 2-node deployment (W1 is the witness for the 2-node vSAN deployment at remote site 1, and W2 is the witness for the 2-node vSAN deployment at remote site 2). Thus if one site has a failure, it impacts the availability of the other site. [Update] As of March 16th, 2017, VMware has change our stance with around this configuration. We will now ... Run from each VM host - not witness. Information on Witness Traffic Separation. Troubleshoot with vmkping. esxclivsan network ip add -i vmk0 –T=witness. vmkping <IP of vsan VMK on target> -I vmk1. By default, witness traffic from the hosts travels across the vsan network – in a direct connect scenario, that network is not routable.
Dec 01, 2019 · In vSAN the smallest number of Fault Domains is 3 and this config will protect against a single FD failure. To protect against two FD failures using MIRROR, we will need 2n+1=5 Fault Domains, for 3 failures protection with MIRROR we will need 7 FDs.
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