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VMware vSphere from the documentation: HA failure responses, admission control, resource controls, alarms and logs

Go beyond 'HA restarts VMs': how the primary host tells a failed host from an isolated or partitioned one, isolation responses and VM Component Protection for APD and PDL, what HA checks before a restart, admission control and why not to turn it off, shares, reservations and limits, acknowledging versus resetting alarms, collecting logs and knowing which log to read, and recovering orphaned VMs.

Level
Intermediate
Length
About 60 minutes
Contents
3 lessons · 1 video · final exam
Status
Published · updated 2 Oct 2026
  • VMware vSphere
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Skills you'll practise

  • Explain how network and datastore heartbeating let the HA primary host classify a failure
  • Choose a host isolation response and VMCP settings for APD and PDL, and explain their prerequisites
  • List what vSphere HA checks before restarting a VM elsewhere
  • Explain what admission control blocks and why it shouldn't be left disabled
  • Set shares, reservations and limits following VMware's suggestions, and spot settings that cause slowness or blocked power-ons
  • Acknowledge or reset alarms correctly, collect logs, find the right log file, and recover an orphaned VM

Course outline

  1. 1.vSphere HA, resources and troubleshootingVideo · 2 min
  2. 2.How HA decides what happenedLesson · 22 min
  3. 3.Admission control and resource controlsLesson · 20 min
  4. 4.Alarms, logs and orphaned VMsLesson · 18 min
  5. 5.VMware vSphere from the documentation: HA failure responses, admission control, resource controls, alarms and logs: knowledge checkKnowledge check · 17 questions
  6. 6.Final exam10 questions · passing it completes the course, so people who already know the material can test out

Sources it draws on

The lessons and questions are written from these references, so learners can go back to the original.

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