示例#1
0
// NodeSelectorRequirementsAsSelector converts the []NodeSelectorRequirement api type into a struct that implements
// labels.Selector.
func NodeSelectorRequirementsAsSelector(nsm []NodeSelectorRequirement) (labels.Selector, error) {
	if len(nsm) == 0 {
		return labels.Nothing(), nil
	}
	selector := labels.NewSelector()
	for _, expr := range nsm {
		var op selection.Operator
		switch expr.Operator {
		case NodeSelectorOpIn:
			op = selection.In
		case NodeSelectorOpNotIn:
			op = selection.NotIn
		case NodeSelectorOpExists:
			op = selection.Exists
		case NodeSelectorOpDoesNotExist:
			op = selection.DoesNotExist
		case NodeSelectorOpGt:
			op = selection.GreaterThan
		case NodeSelectorOpLt:
			op = selection.LessThan
		default:
			return nil, fmt.Errorf("%q is not a valid node selector operator", expr.Operator)
		}
		r, err := labels.NewRequirement(expr.Key, op, expr.Values)
		if err != nil {
			return nil, err
		}
		selector = selector.Add(*r)
	}
	return selector, nil
}
示例#2
0
// matchPodName returns selection predicate that matches any pod with name in the set.
// Makes testing simpler.
func matchPodName(names ...string) storage.SelectionPredicate {
	// Note: even if pod name is a field, we have to use labels,
	// because field selector doesn't support "IN" operator.
	l, err := labels.NewRequirement("name", selection.In, names)
	if err != nil {
		panic("Labels requirement must validate successfully")
	}
	return storage.SelectionPredicate{
		Label:    labels.Everything().Add(*l),
		Field:    fields.Everything(),
		GetAttrs: getPodAttrs,
	}
}
示例#3
0
// LabelSelectorAsSelector converts the LabelSelector api type into a struct that implements
// labels.Selector
// Note: This function should be kept in sync with the selector methods in pkg/labels/selector.go
func LabelSelectorAsSelector(ps *LabelSelector) (labels.Selector, error) {
	if ps == nil {
		return labels.Nothing(), nil
	}
	if len(ps.MatchLabels)+len(ps.MatchExpressions) == 0 {
		return labels.Everything(), nil
	}
	selector := labels.NewSelector()
	for k, v := range ps.MatchLabels {
		r, err := labels.NewRequirement(k, selection.Equals, []string{v})
		if err != nil {
			return nil, err
		}
		selector = selector.Add(*r)
	}
	for _, expr := range ps.MatchExpressions {
		var op selection.Operator
		switch expr.Operator {
		case LabelSelectorOpIn:
			op = selection.In
		case LabelSelectorOpNotIn:
			op = selection.NotIn
		case LabelSelectorOpExists:
			op = selection.Exists
		case LabelSelectorOpDoesNotExist:
			op = selection.DoesNotExist
		default:
			return nil, fmt.Errorf("%q is not a valid pod selector operator", expr.Operator)
		}
		r, err := labels.NewRequirement(expr.Key, op, append([]string(nil), expr.Values...))
		if err != nil {
			return nil, err
		}
		selector = selector.Add(*r)
	}
	return selector, nil
}