# What details actually should be in the " instackenv.json " file during Instack-Overcloud deployment in a VM ??

Hi all,

I am new to OpenStack and I am trying to setup OpenStack using Instack. I have Setup the "Undercloud" environment in BAREMETAL and I am proceeding to Overcloud Deployment using a VM.

I am using this link . (https://www.rdoproject.org/Deploying_an_RDO_Overcloud_with_Instack (https://www.rdoproject.org/Deploying_...))

During this process, I am struck at the parameters required in instackenv.json file. There are few parameters required in it,

1. I want to know the exact purpose of each parameter in that file and where to look for it.
2. What are the mandatory parameters in it ?

 {
"nodes": [
{
"pm_type": "pxe_ipmitool",
"mac": [
"mac address of nic that will handle pxe boot goes here"
],
"cpu": "4",
"memory": "32768",
"disk": "900",
"arch": "x86_64",
},
{
"pm_type": "pxe_ipmitool",
"mac": [
"mac address of nic that will handle pxe boot goes here"
],
"cpu": "4",
"memory": "32768",
"disk": "900",
"arch": "x86_64",