PowerCLI – Configure Syslog for All Hosts

Here’s a quick bit of PowerCLI to configure syslog server on all hosts, place each hosts logs in a unique directory, and then enable the firewall exception to allow it to be used. This will do every host in the vCenter you’re connected to. I highly recommend that anyone managing a vSphere environment set up a syslog destination for ESXi. There’s nothing more frustrating than attempting root-cause analysis on a failure when logs aren’t persistent and in a central location.

Cheers!

#Get all ESXi hosts
$hosts = Get-VMHost

#Update Syslog configuration
$hosts | Set-VMHostAdvancedConfiguration Syslog.global.logHost -Value 0.0.0.0
$hosts | Set-VMHostAdvancedConfiguration Syslog.global.logDirUnique -Value True

#Enable firewall exception
$hosts | Get-VMHostFirewallException | where {$_.Name.StartsWith('syslog')} |
    Set-VMHostFirewallException -Enabled $true

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