I recently built out a new VMware cluster, and in doing so, needed to configure the NTP servers for each host. While this can certainly be done manually, it’s very repetitive and opens up the possibility of missing or misconfigured setting. Fortunately, there’s a way to automate that using PowerCLI!
Now, the way I wrote this script makes it a bit more interactive for the person running it. Typically, you could just define the NTP servers you want to remove, the ones to want to add, and let it run. With this script, it asks the user several questions along the way. Questions like, “What vCenter do you want to connect to?”, “What cluster do you want to scan?”, “Do you want to remove all existing NTP servers? [Y] / [N]”, and so on. There’s also validation included on the responses to the Y/N questions. And at the very end of the script, it checks the NTP services on each host in the cluster. If the NTP service is already running, it will restart the service. If it’s not running, it will start the service. All automatically. Continue reading “PowerCLI: Add/Remove NTP Servers in a VMware Cluster”