Steps to reproduce:

1. Apply template to a actual node
2. Wait.... javascript issue on discovery "Disk discovery"

Result:

Javacript issue when disk is not linked to a cluster (field node.name is not present)

Expected:
Disk is skipped

Solution :

var result = [];

JSON.parse(value).records.forEach(function (disk) {
    if (typeof disk.name !== 'undefined' && typeof disk.node !== 'undefined' && typeof disk.node.name !== 'undefined') {
       result.push({"

": disk.name, "{#NODENAME}": disk.node.name});
    }
});

return JSON.stringify(result);

To avoid add data when name, node or node.name is not populated