Setting up graphical Centos 7

yum group install “KDE Plasma Workspaces”

grubby –update-kernel=ALL –args=”video=hyperv_fb:1920×1080″

systemctl set-default graphical.target

Pointing ESX to Syslog server

It has been possible for a while to send system logs to a syslog server over the network.  In your Linux server edit syslog server to enable listening on port 514 for both UDP and TCP connections.  Restart rsyslog and make the following changes to your ESX Cluster using PowerCLI:

Connect-VIServer 192.168.0.10 
Get-VMHost | Set-VMHostSysLogServer -SysLogServer 'udp://192.168.0.130:514' 
Get-VMHost | Get-VMHostFirewallException -Name syslog | Set-VMHostFirewallException -Enabled:$True 
$esxcli = Get-ESXCLI -VMHost 192.168.0.17 
$esxcli.system.syslog.reload()

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Deleting old ZFS signatures from a disk

If you wish to reuse a disk for ceph it has to be clear of previous filesystem signatures such as ZFS.  To clear all the signatures use wipefs:

sudo wipefs --all --force /dev/vdb