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testing: test invocation of newer plugins with an older libcni
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,167 @@ | ||
| // Copyright 2016 CNI 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 legacy_examples | ||
|
|
||
| // An ExampleRuntime is a small program that uses libcni to invoke a network plugin. | ||
| // It should call ADD and DELETE, verifying all intermediate steps | ||
| // and data structures. | ||
| type ExampleRuntime struct { | ||
| Example | ||
| NetConfs []string // The network configuration names to pass | ||
| } | ||
|
|
||
| // NetConfs are various versioned network configuration files. Examples should | ||
| // specify which version they expect | ||
| var NetConfs = map[string]string{ | ||
| "unversioned": `{ | ||
| "name": "default", | ||
| "type": "ptp", | ||
| "ipam": { | ||
| "type": "host-local", | ||
| "subnet": "10.1.2.0/24" | ||
| } | ||
| }`, | ||
| "0.1.0": `{ | ||
| "cniVersion": "0.1.0", | ||
| "name": "default", | ||
| "type": "ptp", | ||
| "ipam": { | ||
| "type": "host-local", | ||
| "subnet": "10.1.2.0/24" | ||
| } | ||
| }`, | ||
| } | ||
|
|
||
| // V010_Runtime creates a simple ptp network configuration, then | ||
| // executes libcni against the currently-built plugins. | ||
| var V010_Runtime = ExampleRuntime{ | ||
| NetConfs: []string{"unversioned", "0.1.0"}, | ||
| Example: Example{ | ||
| Name: "example_invoker_v010", | ||
| CNIRepoGitRef: "c0d34c69", //version with ns.Do | ||
| PluginSource: `package main | ||
| import ( | ||
| "fmt" | ||
| "io/ioutil" | ||
| "net" | ||
| "os" | ||
| "github.com/containernetworking/cni/pkg/ns" | ||
| "github.com/containernetworking/cni/libcni" | ||
| ) | ||
| func main(){ | ||
| code := exec() | ||
| os.Exit(code) | ||
| } | ||
| func exec() int { | ||
| confBytes, err := ioutil.ReadAll(os.Stdin) | ||
| if err != nil { | ||
| fmt.Printf("could not read netconfig from stdin: %+v", err) | ||
| return 1 | ||
| } | ||
| netConf, err := libcni.ConfFromBytes(confBytes) | ||
| if err != nil { | ||
| fmt.Printf("could not parse netconfig: %+v", err) | ||
| return 1 | ||
| } | ||
| fmt.Printf("Parsed network configuration: %+v\n", netConf.Network) | ||
| if len(os.Args) == 1 { | ||
| fmt.Printf("Expect CNI plugin paths in argv") | ||
| return 1 | ||
| } | ||
| targetNs, err := ns.NewNS() | ||
| if err != nil { | ||
| fmt.Printf("Could not create ns: %+v", err) | ||
| return 1 | ||
| } | ||
| defer targetNs.Close() | ||
| ifName := "eth0" | ||
| runtimeConf := &libcni.RuntimeConf{ | ||
| ContainerID: "some-container-id", | ||
| NetNS: targetNs.Path(), | ||
| IfName: ifName, | ||
| } | ||
| cniConfig := &libcni.CNIConfig{Path: os.Args[1:]} | ||
| result, err := cniConfig.AddNetwork(netConf, runtimeConf) | ||
| if err != nil { | ||
| fmt.Printf("AddNetwork failed: %+v", err) | ||
| return 2 | ||
| } | ||
| fmt.Printf("AddNetwork result: %+v", result) | ||
| expectedIP := result.IP4.IP | ||
| err = targetNs.Do(func(ns.NetNS) error { | ||
| netif, err := net.InterfaceByName(ifName) | ||
| if err != nil { | ||
| return fmt.Errorf("could not retrieve interface: %v", err) | ||
| } | ||
| addrs, err := netif.Addrs() | ||
| if err != nil { | ||
| return fmt.Errorf("could not retrieve addresses, %+v", err) | ||
| } | ||
| found := false | ||
| for _, addr := range addrs { | ||
| if addr.String() == expectedIP.String() { | ||
| found = true | ||
| break | ||
| } | ||
| } | ||
| if !found { | ||
| return fmt.Errorf("Far-side link did not have expected address %s", expectedIP) | ||
| } | ||
| return nil | ||
| }) | ||
| if err != nil { | ||
| fmt.Println(err) | ||
| return 4 | ||
| } | ||
| err = cniConfig.DelNetwork(netConf, runtimeConf) | ||
| if err != nil { | ||
| fmt.Printf("DelNetwork failed: %v", err) | ||
| return 5 | ||
| } | ||
| err = targetNs.Do(func(ns.NetNS) error { | ||
| _, err := net.InterfaceByName(ifName) | ||
| if err == nil { | ||
| return fmt.Errorf("interface was not deleted") | ||
| } | ||
| return nil | ||
| }) | ||
| if err != nil { | ||
| fmt.Println(err) | ||
| return 6 | ||
| } | ||
| return 0 | ||
| } | ||
| `, | ||
| }, | ||
| } |