Feature Request

Proposal:

I need to add the configured memory size of virtual machines in the vSphere input plugin. I worked on the code and was able to compile it. It works with the desired behaviour.

Current behavior:

vSphere input plugin does not allow us to retrieve the configured memory size of a virtual machine. The only metric available is the mem.granted.average which is not always equal to the actual configuration of the machine.

See this VMWare website or this paper to understand why.

Desired behavior:

The vSphere plugin should be able to retrieve the actual configuration of the VM. The value being a configuration metric, and not a performance metric, it should be delivered as a tag.

For example :

vsphere_vm_virtualDisk,esxhostname=DC0_H0,guest=other,host=host.example.com,moid=vm-35,os=Mac,source=DC0_H0_VM0,vcenter=localhost:8989,vmname=DC0_H0_VM0,memorySizeMB=2048 write_average=144i,read_average=4i 1535660299000000000
vsphere_vm_net,esxhostname=DC0_H0,guest=other,host=host.example.com,moid=vm-38,os=Mac,source=DC0_H0_VM1,vcenter=localhost:8989,vmname=DC0_H0_VM1,memorySizeMB=8192 bytesRx_average=242i,bytesTx_average=308i 1535660299000000000

Use case:

• Be able to show the VM configuration in dashboards.
• Make recommendations on the configuration of the VM (either add or remove RAM), by comparing it with the RAM utilization.