Unexpected reboot of ESXi hosts
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Unexpected reboot of ESXi hosts

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Article ID: 380152

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Updated On:

Products

VMware vSphere ESXi

Issue/Introduction

This article provides steps to determine why a host spontaneously rebooted.

Symptoms:

  • ESXi host abrubtly reboots without any changes done by the user.
  • After reboot the host will recover by itself. The VMs will re-distributed to another host without significant impact as long as DRS is enabled.

Environment

VMware vSphere ESXi 6.x
VMware vSphere ESXi 7.x
VMware vSphere ESXi 8.x

Cause

In the vmkernel logs, there may be entries indicating that the power button was pressed, triggering the restart. This suggests that a user-initiated action led to a graceful shutdown.

2024-10-21T09:52:27.005Z cpu0:2101545)VMKAcpi: 256: Power button pressed; requesting graceful shutdown and poweroff


From hostd logs, parallely we can see that the shutdown was a forceful operation.

2024-10-21T09:52:27.005Z info hostd[2100455] [Originator@6876 sub=Hostsvc.HaHost] ACPI power event from the vmkernel  
2024-10-21T09:52:27.006Z info hostd[2100455] [Originator@6876 sub=Hostsvc.HaHost] Shutdown, force = true  
2024-10-21T09:52:27.006Z warning hostd[2100455] [Originator@6876 sub=Hostsvc.HaHost] Failed to find activation record, event user unknown.  
2024-10-21T09:52:27.006Z info hostd[2100455] [Originator@6876 sub=Vimsvc.ha-eventmgr] Event 679147 : Shut down of <ESXhostname> in ha-datacenter: Unknown  
2024-10-21T09:52:27.007Z info hostd[2100455] [Originator@6876 sub=SysCommandPosix] ForkExec(/usr/lib/vmware/vob/bin/addvob) 214058855  
2024-10-21T09:52:27.009Z info hostd[2516901] [Originator@6876 sub=Vimsvc.TaskManager opID=2c8f4244 user=vpxuser] Task Created : haTask--vim.event.EventHistoryCollector.readNext-13046911  
2024-10-21T09:52:27.009Z info hostd[161861312] [Originator@6876 sub=Vimsvc.TaskManager opID=2c8f4244 user=vpxuser] Task Completed : haTask--vim.event.EventHistoryCollector.readNext-13046911 Status success  
2024-10-21T09:52:27.018Z info hostd[2516902] [Originator@6876 sub=Hostsvc.VmkVprobSource] VmkVprobSource::Post event: (vim.event.EventEx) {  
--> key = 65,  
--> chainId = -1897761432,  
--> createdTime = "1970-01-01T00:00:00Z",  
--> userName = "",  
--> host = (vim.event.HostEventArgument) {  
--> name = "<ESX host name>",  
--> host = 'vim.HostSystem:ha-host'  
--> },  
--> eventTypeId = "esx.audit.hostd.host.poweroff.reason",  
--> arguments = (vmodl.KeyAnyValue) [  
--> (vmodl.KeyAnyValue) {  
--> key = "1",  
--> value = " Last reboot reason is unknown. Please check ESXi and the BMC logs for further details. "  
--> },  
--> (vmodl.KeyAnyValue) {  
--> key = "2",  
--> value = "Unknown"  
--> }  
--> ],  
--> objectId = "ha-host",  
--> objectType = "vim.HostSystem",  
--> }  
2024-10-21T09:52:27.019Z info hostd[2516902] [Originator@6876 sub=Vimsvc.ha-eventmgr] Event 679148 : The host is being powered off through hostd. Reason for powering off: Last reboot reason is unknown. Please check ESXi and the BMC logs for further details. , User: Unknown. Please consult vSphere Documentation Center or follow the Ask VMware link for more information.  
2024-10-21T09:52:27.020Z info hostd[2100456] [Originator@6876 sub=Vimsvc.TaskManager opID=2c8f4245 user=vpxuser] Task Created : haTask--vim.event.EventHistoryCollector.readNext-13046912  
2024-10-21T09:52:27.021Z info hostd[2516901] [Originator@6876 sub=Vimsvc.TaskManager opID=2c8f4245 user=vpxuser] Task Completed : haTask--vim.event.EventHistoryCollector.readNext-13046912 Status success  
2024-10-21T09:52:27.059Z info hostd[2100455] [Originator@6876 sub=SysCommandPosix] ForkExec(/sbin/poweroff) 214058856

Resolution

vmkernel and hostd logs indicate that a user-initiated action was involved in rebooting the ESXi hosts. Verify if the reboot was intentional, possibly following an update or upgrade.

Additional Information

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