MachineInventorySelectorTemplate reference
The MachineInventorySelectorTemplate is a user defined resource that will be used as the blueprint to create the required MachineInventorySelectors.
It 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.
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.