MachineInventorySelectorTemplate reference

The MachineInventorySelectorTemplate is the resource responsible of defining the matching criteria to pair an inventoried machine with a Cluster resource.

The relevant key is the selector which includes label selector expressions.

MachineInventorySelectorTemplate

apiVersion: elemental.cattle.io/v1beta1
kind: MachineInventorySelectorTemplate
metadata:
  name: my-machine-selector
  namespace: fleet-default
spec:
  template:
    spec:
      selector:
        ...

template.spec.selector can include matchLabels and or matchExpressions keys.

template.spec.selector.matchLabels

It is a map of {key,value} pairs (map[string]string). When multiple labels are provided all labels must match.

Example

...
spec:
  template:
    spec:
      selector:
        matchLabels:
          element: fire
          manufacturer: somevalue

A Cluster defined with the above selector will only attempt to provision nodes inventoried including these two labels.

template.spec.selector.matchExpressions

It is a list of label selectors, each label selectors can be defined as:

Key	Type	Description
key	string	This is the label key the selector applies on
operator	string	Represents the relationship of the key to a set of values. Valid operators are 'In', 'NotIn', 'Exists' and 'DoesNotExist'
values	[]string	Values is an array of string values. If the operator is 'In' or 'NotIn', the values array must be non-empty. If the operator is 'Exists' or 'DoesNotExist', the values array must be empty

Example

...
spec:
  template:
    spec:
      selector:
        matchExpressions:
          - key: element
            operator: In
            values: [ 'fire' ]
          - key: manufacturer
            operator: Exists

A Cluster defined with the above selector will only attempt to provision nodes inventoried with the element=fire label and including a manufacturer label defined with any value.