VMware PowerCLI 101 - part12 - Get uptime and boot time of ESXi nodes and VMs

You can use the following PowerCLI commandlets to get the uptime and boot time of ESXi hosts and VMs.

• Get ESXi boot time.

> Get-Cluster | Get-VMHost | Select Name, @{Name="Boot time";Expression={$_.ExtensionData.Runtime.BootTime}}

Name                                  Boot time
----                                  ---------
esxi1.wxxxxx.com                      2/27/2025 10:13:45 AM
esxi2.wxxxxx.com                      6/18/2025 2:39:38 PM

• Get ESXi uptime.

> Get-Cluster | Get-VMHost | Select Name, @{Name="Uptime (Days)";Expression={(Get-Date) - $_.ExtensionData.Runtime.BootTime | Select-Object -ExpandProperty Days}}

Name                                  Uptime (Days)
----                                  -------------
esxi1.wxxxxx.com                      116
esxi2.wxxxxx.com                      5

• Get VM boot time.

> Get-Cluster | Get-VM | Select Name, @{Name="Boot time";Expression={$_.ExtensionData.Runtime.BootTime}}

Name                                      Boot time
----                                      ---------
test-vineeth
rhel84-vineeth
VMware vCenter Server                     2/25/2025 11:28:13 AM
vCLS-50a1b507-5a1d-5e00-8410-7599fc72e5b5 6/18/2025 2:51:59  PM

• Get VM uptime.

> Get-Cluster | Get-VM | Select Name, @{Name="Uptime (Days)";Expression={(Get-Date) - $_.ExtensionData.Runtime.BootTime | Select-Object -ExpandProperty Days}}

Name                                      Uptime (Days)
----                                      -------------
test-vineeth
rhel84-vineeth
VMware vCenter Server                     118
vCLS-50a1b507-5a1d-5e00-8410-7599fc72e5b5 5

Hope it was useful. Cheers!