Test port connectivity in VMware Virtual Appliances

When troubleshooting connectivity for VMware virtual appliances (for example Log Insight, vRealize Operations Manager, vRealize Orchestrator etc) it can be useful to have a simple way to test that ports are open. Especially in DMZ environments with firewall devices.

In the past I have been asked by VMware support to manually install netcat but I recently came across a VMware KB suggesting curl could be used. This is a simpler solution than installing additional software and while the KB references the vCenter server Appliance I have confirmed the curl is available in the vROps appliance as well.

https://kb.vmware.com/kb/2097039

Expanding an Eager Zero Thick VMDK

Expanding an Eager Zero Thick VMDK via the vsphere client will result in the disk being labelled Lazy Zero Thick. I was not expecting this behaviour but it is described in an article by Cormac Hogan (https://blogs.vmware.com/vsphere/2012/06/extending-an-eagerzeroedthick-disk.html). A user in the comments section of that article suggests the issue has been fixed in vSphere 6 but I have not been able to test it for myself.