Exemple #1
0
func (st *State) constraintsValidator() (constraints.Validator, error) {
	// Default behaviour is to simply use a standard validator with
	// no environment specific behaviour built in.
	defaultValidator := constraints.NewValidator()
	if st.policy == nil {
		return defaultValidator, nil
	}
	cfg, err := st.EnvironConfig()
	if err != nil {
		return nil, err
	}
	validator, err := st.policy.ConstraintsValidator(cfg)
	if errors.IsNotImplemented(err) {
		return defaultValidator, nil
	} else if err != nil {
		return nil, err
	}
	if validator == nil {
		return nil, fmt.Errorf("policy returned nil constraints validator without an error")
	}
	return validator, nil
}
Exemple #2
0
// ConstraintsValidator is defined on the Environs interface.
func (e *environ) ConstraintsValidator() (constraints.Validator, error) {
	validator := constraints.NewValidator()
	validator.RegisterUnsupported([]string{constraints.CpuPower})
	validator.RegisterConflicts([]string{constraints.InstanceType}, []string{constraints.Mem})
	return validator, nil
}