forked from openyurtio/openyurt
-
Notifications
You must be signed in to change notification settings - Fork 0
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
[feature]: add dummy network interface for yurthub (openyurtio#289)
- Loading branch information
1 parent
a20723a
commit bfc22fc
Showing
12 changed files
with
605 additions
and
38 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,123 @@ | ||
| /* | ||
| Copyright 2021 The OpenYurt 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 network | ||
|
|
||
| import ( | ||
| "fmt" | ||
| "net" | ||
| "strings" | ||
|
|
||
| "k8s.io/klog" | ||
|
|
||
| "github.com/vishvananda/netlink" | ||
| ) | ||
|
|
||
| type DummyInterfaceController interface { | ||
| EnsureDummyInterface(ifName string, ifIP net.IP) error | ||
| DeleteDummyInterface(ifName string) error | ||
| ListDummyInterface(ifName string) ([]net.IP, error) | ||
| } | ||
|
|
||
| type dummyInterfaceController struct { | ||
| netlink.Handle | ||
| } | ||
|
|
||
| // NewDummyInterfaceManager returns an instance for create/delete dummy net interface | ||
| func NewDummyInterfaceController() DummyInterfaceController { | ||
| return &dummyInterfaceController{ | ||
| Handle: netlink.Handle{}, | ||
| } | ||
| } | ||
|
|
||
| // EnsureDummyInterface make sure the dummy net interface with specified name and ip exist | ||
| func (dic *dummyInterfaceController) EnsureDummyInterface(ifName string, ifIP net.IP) error { | ||
| link, err := dic.LinkByName(ifName) | ||
| if err == nil { | ||
| addrs, err := dic.AddrList(link, 0) | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
|
||
| for _, addr := range addrs { | ||
| if addr.IP != nil && addr.IP.Equal(ifIP) { | ||
| return nil | ||
| } | ||
| } | ||
|
|
||
| klog.Infof("ip address for %s interface changed to %s", ifName, ifIP.String()) | ||
| return dic.AddrReplace(link, &netlink.Addr{IPNet: netlink.NewIPNet(ifIP)}) | ||
| } | ||
|
|
||
| if strings.Contains(err.Error(), "Link not found") && link == nil { | ||
| return dic.addDummyInterface(ifName, ifIP) | ||
| } | ||
|
|
||
| return err | ||
| } | ||
|
|
||
| // addDummyInterface creates a dummy net interface with the specified name and ip | ||
| func (dic *dummyInterfaceController) addDummyInterface(ifName string, ifIP net.IP) error { | ||
| _, err := dic.LinkByName(ifName) | ||
| if err == nil { | ||
| return fmt.Errorf("Link %s exists", ifName) | ||
| } | ||
|
|
||
| dummy := &netlink.Dummy{ | ||
| LinkAttrs: netlink.LinkAttrs{Name: ifName}, | ||
| } | ||
| err = dic.LinkAdd(dummy) | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
|
||
| link, err := dic.LinkByName(ifName) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| return dic.AddrAdd(link, &netlink.Addr{IPNet: netlink.NewIPNet(ifIP)}) | ||
| } | ||
|
|
||
| // DeleteDummyInterface delete the dummy net interface with specified name | ||
| func (dic *dummyInterfaceController) DeleteDummyInterface(ifName string) error { | ||
| link, err := dic.LinkByName(ifName) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| return dic.LinkDel(link) | ||
| } | ||
|
|
||
| // ListDummyInterface list all ips for network interface specified by ifName | ||
| func (dic *dummyInterfaceController) ListDummyInterface(ifName string) ([]net.IP, error) { | ||
| ips := make([]net.IP, 0) | ||
| link, err := dic.LinkByName(ifName) | ||
| if err != nil { | ||
| return ips, err | ||
| } | ||
|
|
||
| addrs, err := dic.AddrList(link, 0) | ||
| if err != nil { | ||
| return ips, err | ||
| } | ||
|
|
||
| for _, addr := range addrs { | ||
| if addr.IP != nil { | ||
| ips = append(ips, addr.IP) | ||
| } | ||
| } | ||
|
|
||
| return ips, nil | ||
| } |
Oops, something went wrong.