// PrecheckInstance is defined on the state.Prechecker interface.
func (env *joyentEnviron) PrecheckInstance(series string, cons constraints.Value, placement string) error {
if placement != "" {
return fmt.Errorf("unknown placement directive: %s", placement)
}
if !cons.HasInstanceType() {
return nil
}
// Constraint has an instance-type constraint so let's see if it is valid.
instanceTypes, err := env.listInstanceTypes()
if err != nil {
return err
}
for _, instanceType := range instanceTypes {
if instanceType.Name == *cons.InstanceType {
return nil
}
}
return fmt.Errorf("invalid Joyent instance %q specified", *cons.InstanceType)
}
