| // Copyright Istio Authors |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| package visibility |
| |
| import ( |
| "fmt" |
| ) |
| |
| import ( |
| "github.com/apache/dubbo-go-pixiu/pkg/config/labels" |
| ) |
| |
| // Instance defines whether a given config or service is exported to local namespace, some set of namespaces, or |
| // all namespaces or none |
| type Instance string |
| |
| const ( |
| // Private implies namespace local config |
| Private Instance = "." |
| // Public implies config is visible to all |
| Public Instance = "*" |
| // None implies service is visible to no one. Used for services only |
| None Instance = "~" |
| ) |
| |
| // Validate a visibility value ( ./*/~/some namespace name which is DNS1123 label) |
| func (v Instance) Validate() (errs error) { |
| switch v { |
| case Private, Public: |
| return nil |
| case None: |
| return fmt.Errorf("exportTo ~ (none) is not allowed for Istio configuration objects") |
| default: |
| if !labels.IsDNS1123Label(string(v)) { |
| return fmt.Errorf("only .,*,~, or a valid DNS 1123 label is allowed as exportTo entry") |
| } |
| } |
| return nil |
| } |