Create plugin to monitor host memory about check-vmware HOT 4 CLOSED

Note: This might be extended to cover host CPU usage as well, but the initial design is intended specifically for host memory monitoring.

from check-vmware.

Starting work on this.

From the doc.go file for the plugin-to-be:

In addition to reporting current host memory usage, this plugin also reports which VMs are running on the host along with their percentage of the total memory used.

Basically borrow the ideas from the datastore monitoring plugin, but specific to a single host.

Hopefully including the list of VMs (presumably sorted by memory usage) will come in handy to anyone receive an alert for host memory usage.

from check-vmware.

It would be good to include the number of VMs running on the host in the one-line summary. Due to access/permissions, the number will likely reflect only those VMs the service account executing the plugin has access to, but that's still useful.

If a service account is used by a cluster admin, they'll see the full number (and listing in the extended output), but if the service account is used by a team that is managing only a portion of the resources (e.g., a tenant leasing hosting capacity) they'll see the number and relevant VMs to them.

This seems to still be a useful thing.

from check-vmware.

TODO: Include HR version of host.Hardware.MemorySize in extended summary output.

from check-vmware.