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api_test.go
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// 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 libcni_test
import (
"bytes"
"context"
"encoding/json"
"fmt"
"io/ioutil"
"net"
"os"
"path/filepath"
"reflect"
"strings"
"time"
"github.com/containernetworking/cni/libcni"
"github.com/containernetworking/cni/pkg/skel"
"github.com/containernetworking/cni/pkg/types"
"github.com/containernetworking/cni/pkg/types/current"
noop_debug "github.com/containernetworking/cni/plugins/test/noop/debug"
. "github.com/onsi/ginkgo"
. "github.com/onsi/gomega"
)
type pluginInfo struct {
debugFilePath string
debug *noop_debug.Debug
config string
stdinData []byte
}
type portMapping struct {
HostPort int `json:"hostPort"`
ContainerPort int `json:"containerPort"`
Protocol string `json:"protocol"`
}
func stringInList(s string, list []string) bool {
for _, item := range list {
if s == item {
return true
}
}
return false
}
func newPluginInfo(configValue, prevResult string, injectDebugFilePath bool, result string, runtimeConfig map[string]interface{}, capabilities []string) pluginInfo {
debugFile, err := ioutil.TempFile("", "cni_debug")
Expect(err).NotTo(HaveOccurred())
Expect(debugFile.Close()).To(Succeed())
debugFilePath := debugFile.Name()
debug := &noop_debug.Debug{
ReportResult: result,
}
Expect(debug.WriteDebug(debugFilePath)).To(Succeed())
// config is what would be in the plugin's on-disk configuration
// without runtime injected keys
config := fmt.Sprintf(`{"type": "noop", "some-key": "%s"`, configValue)
if prevResult != "" {
config += fmt.Sprintf(`, "prevResult": %s`, prevResult)
}
if injectDebugFilePath {
config += fmt.Sprintf(`, "debugFile": %q`, debugFilePath)
}
if len(capabilities) > 0 {
config += `, "capabilities": {`
for i, c := range capabilities {
if i > 0 {
config += ", "
}
config += fmt.Sprintf(`"%s": true`, c)
}
config += "}"
}
config += "}"
// stdinData is what the runtime should pass to the plugin's stdin,
// including injected keys like 'name', 'cniVersion', and 'runtimeConfig'
newConfig := make(map[string]interface{})
err = json.Unmarshal([]byte(config), &newConfig)
Expect(err).NotTo(HaveOccurred())
newConfig["name"] = "some-list"
newConfig["cniVersion"] = current.ImplementedSpecVersion
// Only include standard runtime config and capability args that this plugin advertises
newRuntimeConfig := make(map[string]interface{})
for key, value := range runtimeConfig {
if stringInList(key, capabilities) {
newRuntimeConfig[key] = value
}
}
if len(newRuntimeConfig) > 0 {
newConfig["runtimeConfig"] = newRuntimeConfig
}
stdinData, err := json.Marshal(newConfig)
Expect(err).NotTo(HaveOccurred())
return pluginInfo{
debugFilePath: debugFilePath,
debug: debug,
config: config,
stdinData: stdinData,
}
}
func resultCacheFilePath(cacheDirPath, netName string, rt *libcni.RuntimeConf) string {
fName := fmt.Sprintf("%s-%s-%s", netName, rt.ContainerID, rt.IfName)
return filepath.Join(cacheDirPath, "results", fName)
}
var _ = Describe("Invoking plugins", func() {
var cacheDirPath string
BeforeEach(func() {
var err error
cacheDirPath, err = ioutil.TempDir("", "cni_cachedir")
Expect(err).NotTo(HaveOccurred())
})
AfterEach(func() {
Expect(os.RemoveAll(cacheDirPath)).To(Succeed())
})
Describe("Capabilities", func() {
var (
debugFilePath string
debug *noop_debug.Debug
pluginConfig []byte
cniConfig *libcni.CNIConfig
runtimeConfig *libcni.RuntimeConf
netConfig *libcni.NetworkConfig
ctx context.Context
)
BeforeEach(func() {
debugFile, err := ioutil.TempFile("", "cni_debug")
Expect(err).NotTo(HaveOccurred())
Expect(debugFile.Close()).To(Succeed())
debugFilePath = debugFile.Name()
debug = &noop_debug.Debug{
ReportResult: fmt.Sprintf(` { "result": %q }`, noop_debug.EmptyReportResultMessage),
}
Expect(debug.WriteDebug(debugFilePath)).To(Succeed())
pluginConfig = []byte(fmt.Sprintf(`{
"type": "noop",
"name": "apitest",
"cniVersion": "%s",
"capabilities": {
"portMappings": true,
"somethingElse": true,
"noCapability": false
}
}`, current.ImplementedSpecVersion))
netConfig, err = libcni.ConfFromBytes(pluginConfig)
Expect(err).NotTo(HaveOccurred())
cniConfig = libcni.NewCNIConfigWithCacheDir([]string{filepath.Dir(pluginPaths["noop"])}, cacheDirPath, nil)
runtimeConfig = &libcni.RuntimeConf{
ContainerID: "some-container-id",
NetNS: "/some/netns/path",
IfName: "some-eth0",
Args: [][2]string{{"DEBUG", debugFilePath}},
CapabilityArgs: map[string]interface{}{
"portMappings": []portMapping{
{HostPort: 8080, ContainerPort: 80, Protocol: "tcp"},
},
"somethingElse": []string{"foobar", "baz"},
"noCapability": true,
"notAdded": []bool{true, false},
},
}
ctx = context.TODO()
})
AfterEach(func() {
Expect(os.RemoveAll(debugFilePath)).To(Succeed())
})
It("adds correct runtime config for capabilities to stdin", func() {
_, err := cniConfig.AddNetwork(ctx, netConfig, runtimeConfig)
Expect(err).NotTo(HaveOccurred())
debug, err = noop_debug.ReadDebug(debugFilePath)
Expect(err).NotTo(HaveOccurred())
Expect(debug.Command).To(Equal("ADD"))
conf := make(map[string]interface{})
err = json.Unmarshal(debug.CmdArgs.StdinData, &conf)
Expect(err).NotTo(HaveOccurred())
// We expect runtimeConfig keys only for portMappings and somethingElse
rawRc := conf["runtimeConfig"]
rc, ok := rawRc.(map[string]interface{})
Expect(ok).To(Equal(true))
expectedKeys := []string{"portMappings", "somethingElse"}
Expect(len(rc)).To(Equal(len(expectedKeys)))
for _, key := range expectedKeys {
_, ok := rc[key]
Expect(ok).To(Equal(true))
}
})
It("adds no runtimeConfig when the plugin advertises no used capabilities", func() {
// Replace CapabilityArgs with ones we know the plugin
// doesn't support
runtimeConfig.CapabilityArgs = map[string]interface{}{
"portMappings22": []portMapping{
{HostPort: 8080, ContainerPort: 80, Protocol: "tcp"},
},
"somethingElse22": []string{"foobar", "baz"},
}
_, err := cniConfig.AddNetwork(ctx, netConfig, runtimeConfig)
Expect(err).NotTo(HaveOccurred())
debug, err = noop_debug.ReadDebug(debugFilePath)
Expect(err).NotTo(HaveOccurred())
Expect(debug.Command).To(Equal("ADD"))
conf := make(map[string]interface{})
err = json.Unmarshal(debug.CmdArgs.StdinData, &conf)
Expect(err).NotTo(HaveOccurred())
// No intersection of plugin capabilities and CapabilityArgs,
// so plugin should not receive a "runtimeConfig" key
_, ok := conf["runtimeConfig"]
Expect(ok).Should(BeFalse())
})
It("outputs correct capabilities for validate", func() {
caps, err := cniConfig.ValidateNetwork(ctx, netConfig)
Expect(err).NotTo(HaveOccurred())
Expect(caps).To(ConsistOf("portMappings", "somethingElse"))
})
})
Describe("Invoking a single plugin", func() {
var (
debugFilePath string
debug *noop_debug.Debug
cniBinPath string
pluginConfig string
cniConfig *libcni.CNIConfig
netConfig *libcni.NetworkConfig
runtimeConfig *libcni.RuntimeConf
ctx context.Context
expectedCmdArgs skel.CmdArgs
)
BeforeEach(func() {
debugFile, err := ioutil.TempFile("", "cni_debug")
Expect(err).NotTo(HaveOccurred())
Expect(debugFile.Close()).To(Succeed())
debugFilePath = debugFile.Name()
debug = &noop_debug.Debug{
ReportResult: `{
"cniVersion": "0.4.0",
"ips": [{"version": "4", "address": "10.1.2.3/24"}],
"dns": {}
}`,
}
Expect(debug.WriteDebug(debugFilePath)).To(Succeed())
portMappings := []portMapping{
{HostPort: 8080, ContainerPort: 80, Protocol: "tcp"},
}
cniBinPath = filepath.Dir(pluginPaths["noop"])
pluginConfig = fmt.Sprintf(`{
"type": "noop",
"name": "apitest",
"some-key": "some-value",
"cniVersion": "%s",
"capabilities": { "portMappings": true }
}`, current.ImplementedSpecVersion)
cniConfig = libcni.NewCNIConfigWithCacheDir([]string{cniBinPath}, cacheDirPath, nil)
netConfig, err = libcni.ConfFromBytes([]byte(pluginConfig))
Expect(err).NotTo(HaveOccurred())
runtimeConfig = &libcni.RuntimeConf{
ContainerID: "some-container-id",
NetNS: "/some/netns/path",
IfName: "some-eth0",
Args: [][2]string{{"DEBUG", debugFilePath}},
CapabilityArgs: map[string]interface{}{
"portMappings": portMappings,
},
}
// inject runtime args into the expected plugin config
conf := make(map[string]interface{})
err = json.Unmarshal([]byte(pluginConfig), &conf)
Expect(err).NotTo(HaveOccurred())
conf["runtimeConfig"] = map[string]interface{}{
"portMappings": portMappings,
}
newBytes, err := json.Marshal(conf)
Expect(err).NotTo(HaveOccurred())
expectedCmdArgs = skel.CmdArgs{
ContainerID: "some-container-id",
Netns: "/some/netns/path",
IfName: "some-eth0",
Args: "DEBUG=" + debugFilePath,
Path: cniBinPath,
StdinData: newBytes,
}
ctx = context.TODO()
})
AfterEach(func() {
Expect(os.RemoveAll(debugFilePath)).To(Succeed())
})
Describe("AddNetwork", func() {
It("executes the plugin with command ADD", func() {
r, err := cniConfig.AddNetwork(ctx, netConfig, runtimeConfig)
Expect(err).NotTo(HaveOccurred())
result, err := current.GetResult(r)
Expect(err).NotTo(HaveOccurred())
Expect(result).To(Equal(¤t.Result{
CNIVersion: current.ImplementedSpecVersion,
IPs: []*current.IPConfig{
{
Version: "4",
Address: net.IPNet{
IP: net.ParseIP("10.1.2.3"),
Mask: net.IPv4Mask(255, 255, 255, 0),
},
},
},
}))
debug, err := noop_debug.ReadDebug(debugFilePath)
Expect(err).NotTo(HaveOccurred())
Expect(debug.Command).To(Equal("ADD"))
Expect(debug.CmdArgs).To(Equal(expectedCmdArgs))
Expect(string(debug.CmdArgs.StdinData)).To(ContainSubstring("\"portMappings\":"))
// Ensure the cached config matches the sent one
cachedConfig, newRt, err := cniConfig.GetNetworkCachedConfig(netConfig, runtimeConfig)
Expect(err).NotTo(HaveOccurred())
Expect(reflect.DeepEqual(cachedConfig, []byte(pluginConfig))).To(BeTrue())
Expect(reflect.DeepEqual(newRt.Args, runtimeConfig.Args)).To(BeTrue())
// CapabilityArgs are freeform, so we have to match their JSON not
// the Go structs (which could be unmarshalled differently than the
// struct that was marshalled).
expectedCABytes, err := json.Marshal(runtimeConfig.CapabilityArgs)
Expect(err).NotTo(HaveOccurred())
foundCABytes, err := json.Marshal(newRt.CapabilityArgs)
Expect(err).NotTo(HaveOccurred())
Expect(foundCABytes).To(MatchJSON(expectedCABytes))
// Ensure the cached result matches the returned one
cachedResult, err := cniConfig.GetNetworkCachedResult(netConfig, runtimeConfig)
Expect(err).NotTo(HaveOccurred())
result2, err := current.GetResult(cachedResult)
Expect(err).NotTo(HaveOccurred())
cachedJson, err := json.Marshal(result2)
Expect(err).NotTo(HaveOccurred())
returnedJson, err := json.Marshal(result)
Expect(err).NotTo(HaveOccurred())
Expect(cachedJson).To(MatchJSON(returnedJson))
})
Context("when finding the plugin fails", func() {
BeforeEach(func() {
netConfig.Network.Type = "does-not-exist"
})
It("returns the error", func() {
_, err := cniConfig.AddNetwork(ctx, netConfig, runtimeConfig)
Expect(err).To(MatchError(ContainSubstring(`failed to find plugin "does-not-exist"`)))
})
})
Context("when the plugin errors", func() {
BeforeEach(func() {
debug.ReportError = "plugin error: banana"
Expect(debug.WriteDebug(debugFilePath)).To(Succeed())
})
It("unmarshals and returns the error", func() {
result, err := cniConfig.AddNetwork(ctx, netConfig, runtimeConfig)
Expect(result).To(BeNil())
Expect(err).To(MatchError("plugin error: banana"))
})
})
Context("when the cache directory cannot be accessed", func() {
It("returns an error", func() {
// Make the results directory inaccessible by making it a
// file instead of a directory
tmpPath := filepath.Join(cacheDirPath, "results")
err := ioutil.WriteFile(tmpPath, []byte("afdsasdfasdf"), 0600)
Expect(err).NotTo(HaveOccurred())
result, err := cniConfig.AddNetwork(ctx, netConfig, runtimeConfig)
Expect(result).To(BeNil())
Expect(err).To(HaveOccurred())
})
})
})
Describe("CheckNetwork", func() {
It("executes the plugin with command CHECK", func() {
cacheFile := resultCacheFilePath(cacheDirPath, netConfig.Network.Name, runtimeConfig)
err := os.MkdirAll(filepath.Dir(cacheFile), 0700)
Expect(err).NotTo(HaveOccurred())
cachedJson := `{
"cniVersion": "0.4.0",
"ips": [{"version": "4", "address": "10.1.2.3/24"}],
"dns": {}
}`
err = ioutil.WriteFile(cacheFile, []byte(cachedJson), 0600)
Expect(err).NotTo(HaveOccurred())
err = cniConfig.CheckNetwork(ctx, netConfig, runtimeConfig)
Expect(err).NotTo(HaveOccurred())
debug, err := noop_debug.ReadDebug(debugFilePath)
Expect(err).NotTo(HaveOccurred())
Expect(debug.Command).To(Equal("CHECK"))
Expect(string(debug.CmdArgs.StdinData)).To(ContainSubstring("\"portMappings\":"))
// Explicitly match stdin data as json after
// inserting the expected prevResult
var data, data2 map[string]interface{}
err = json.Unmarshal(expectedCmdArgs.StdinData, &data)
Expect(err).NotTo(HaveOccurred())
err = json.Unmarshal([]byte(cachedJson), &data2)
Expect(err).NotTo(HaveOccurred())
data["prevResult"] = data2
expectedStdinJson, err := json.Marshal(data)
Expect(err).NotTo(HaveOccurred())
Expect(debug.CmdArgs.StdinData).To(MatchJSON(expectedStdinJson))
debug.CmdArgs.StdinData = nil
expectedCmdArgs.StdinData = nil
Expect(debug.CmdArgs).To(Equal(expectedCmdArgs))
})
Context("when finding the plugin fails", func() {
BeforeEach(func() {
netConfig.Network.Type = "does-not-exist"
})
It("returns the error", func() {
err := cniConfig.CheckNetwork(ctx, netConfig, runtimeConfig)
Expect(err).To(MatchError(ContainSubstring(`failed to find plugin "does-not-exist"`)))
})
})
Context("when the plugin errors", func() {
BeforeEach(func() {
debug.ReportError = "plugin error: banana"
Expect(debug.WriteDebug(debugFilePath)).To(Succeed())
})
It("unmarshals and returns the error", func() {
err := cniConfig.CheckNetwork(ctx, netConfig, runtimeConfig)
Expect(err).To(MatchError("plugin error: banana"))
})
})
Context("when CHECK is called with a configuration version", func() {
var cacheFile string
BeforeEach(func() {
cacheFile = resultCacheFilePath(cacheDirPath, netConfig.Network.Name, runtimeConfig)
err := os.MkdirAll(filepath.Dir(cacheFile), 0700)
Expect(err).NotTo(HaveOccurred())
})
Context("less than 0.4.0", func() {
It("fails as CHECK is not supported before 0.4.0", func() {
// Generate plugin config with older version
pluginConfig = `{
"type": "noop",
"name": "apitest",
"cniVersion": "0.3.1"
}`
var err error
netConfig, err = libcni.ConfFromBytes([]byte(pluginConfig))
Expect(err).NotTo(HaveOccurred())
err = cniConfig.CheckNetwork(ctx, netConfig, runtimeConfig)
Expect(err).To(MatchError("configuration version \"0.3.1\" does not support the CHECK command"))
debug, err := noop_debug.ReadDebug(debugFilePath)
Expect(err).NotTo(HaveOccurred())
Expect(string(debug.CmdArgs.StdinData)).NotTo(ContainSubstring("\"prevResult\":"))
})
})
Context("containing only a cached result", func() {
It("only passes a prevResult to the plugin", func() {
err := ioutil.WriteFile(cacheFile, []byte(`{
"cniVersion": "0.4.0",
"ips": [{"version": "4", "address": "10.1.2.3/24"}],
"dns": {}
}`), 0600)
Expect(err).NotTo(HaveOccurred())
err = cniConfig.CheckNetwork(ctx, netConfig, runtimeConfig)
Expect(err).NotTo(HaveOccurred())
debug, err := noop_debug.ReadDebug(debugFilePath)
Expect(err).NotTo(HaveOccurred())
Expect(string(debug.CmdArgs.StdinData)).To(ContainSubstring("\"prevResult\":"))
Expect(string(debug.CmdArgs.StdinData)).NotTo(ContainSubstring("\"config\":"))
Expect(string(debug.CmdArgs.StdinData)).NotTo(ContainSubstring("\"kind\":"))
})
})
Context("equal to 0.4.0", func() {
It("passes a prevResult to the plugin", func() {
err := ioutil.WriteFile(cacheFile, []byte(`{
"cniVersion": "0.4.0",
"ips": [{"version": "4", "address": "10.1.2.3/24"}],
"dns": {}
}`), 0600)
Expect(err).NotTo(HaveOccurred())
err = cniConfig.CheckNetwork(ctx, netConfig, runtimeConfig)
Expect(err).NotTo(HaveOccurred())
debug, err := noop_debug.ReadDebug(debugFilePath)
Expect(err).NotTo(HaveOccurred())
Expect(string(debug.CmdArgs.StdinData)).To(ContainSubstring("\"prevResult\":"))
})
})
})
Context("when the cached result", func() {
var cacheFile string
BeforeEach(func() {
cacheFile = resultCacheFilePath(cacheDirPath, netConfig.Network.Name, runtimeConfig)
err := os.MkdirAll(filepath.Dir(cacheFile), 0700)
Expect(err).NotTo(HaveOccurred())
})
Context("is invalid JSON", func() {
It("returns an error", func() {
err := ioutil.WriteFile(cacheFile, []byte("adfadsfasdfasfdsafaf"), 0600)
Expect(err).NotTo(HaveOccurred())
err = cniConfig.CheckNetwork(ctx, netConfig, runtimeConfig)
Expect(err).To(MatchError("failed to get network \"apitest\" cached result: decoding version from network config: invalid character 'a' looking for beginning of value"))
})
})
Context("version doesn't match the config version", func() {
It("succeeds when the cached result can be converted", func() {
err := ioutil.WriteFile(cacheFile, []byte(`{
"cniVersion": "0.3.1",
"ips": [{"version": "4", "address": "10.1.2.3/24"}],
"dns": {}
}`), 0600)
Expect(err).NotTo(HaveOccurred())
err = cniConfig.CheckNetwork(ctx, netConfig, runtimeConfig)
Expect(err).NotTo(HaveOccurred())
})
It("returns an error when the cached result cannot be converted", func() {
err := ioutil.WriteFile(cacheFile, []byte(`{
"cniVersion": "0.4567.0",
"ips": [{"version": "4", "address": "10.1.2.3/24"}],
"dns": {}
}`), 0600)
Expect(err).NotTo(HaveOccurred())
err = cniConfig.CheckNetwork(ctx, netConfig, runtimeConfig)
Expect(err).To(MatchError("failed to get network \"apitest\" cached result: unsupported CNI result version \"0.4567.0\""))
})
})
})
})
Describe("DelNetwork", func() {
It("executes the plugin with command DEL", func() {
cacheFile := resultCacheFilePath(cacheDirPath, netConfig.Network.Name, runtimeConfig)
err := os.MkdirAll(filepath.Dir(cacheFile), 0700)
Expect(err).NotTo(HaveOccurred())
cachedJson := `{
"cniVersion": "0.4.0",
"ips": [{"version": "4", "address": "10.1.2.3/24"}],
"dns": {}
}`
err = ioutil.WriteFile(cacheFile, []byte(cachedJson), 0600)
Expect(err).NotTo(HaveOccurred())
err = cniConfig.DelNetwork(ctx, netConfig, runtimeConfig)
Expect(err).NotTo(HaveOccurred())
debug, err := noop_debug.ReadDebug(debugFilePath)
Expect(err).NotTo(HaveOccurred())
Expect(debug.Command).To(Equal("DEL"))
Expect(string(debug.CmdArgs.StdinData)).To(ContainSubstring("\"portMappings\":"))
// Explicitly match stdin data as json after
// inserting the expected prevResult
var data, data2 map[string]interface{}
err = json.Unmarshal(expectedCmdArgs.StdinData, &data)
Expect(err).NotTo(HaveOccurred())
err = json.Unmarshal([]byte(cachedJson), &data2)
Expect(err).NotTo(HaveOccurred())
data["prevResult"] = data2
expectedStdinJson, err := json.Marshal(data)
Expect(err).NotTo(HaveOccurred())
Expect(debug.CmdArgs.StdinData).To(MatchJSON(expectedStdinJson))
debug.CmdArgs.StdinData = nil
expectedCmdArgs.StdinData = nil
Expect(debug.CmdArgs).To(Equal(expectedCmdArgs))
// Ensure the cached result no longer exists
cachedResult, err := cniConfig.GetNetworkCachedResult(netConfig, runtimeConfig)
Expect(err).NotTo(HaveOccurred())
Expect(cachedResult).To(BeNil())
// Ensure the cached config no longer exists
cachedConfig, newRt, err := cniConfig.GetNetworkCachedConfig(netConfig, runtimeConfig)
Expect(err).NotTo(HaveOccurred())
Expect(cachedConfig).To(BeNil())
Expect(newRt).To(BeNil())
})
Context("when finding the plugin fails", func() {
BeforeEach(func() {
netConfig.Network.Type = "does-not-exist"
})
It("returns the error", func() {
err := cniConfig.DelNetwork(ctx, netConfig, runtimeConfig)
Expect(err).To(MatchError(ContainSubstring(`failed to find plugin "does-not-exist"`)))
})
})
Context("when the plugin errors", func() {
BeforeEach(func() {
debug.ReportError = "plugin error: banana"
Expect(debug.WriteDebug(debugFilePath)).To(Succeed())
})
It("unmarshals and returns the error", func() {
err := cniConfig.DelNetwork(ctx, netConfig, runtimeConfig)
Expect(err).To(MatchError("plugin error: banana"))
})
})
Context("when DEL is called twice", func() {
var resultCacheFile string
BeforeEach(func() {
resultCacheFile = resultCacheFilePath(cacheDirPath, netConfig.Network.Name, runtimeConfig)
err := os.MkdirAll(filepath.Dir(resultCacheFile), 0700)
Expect(err).NotTo(HaveOccurred())
})
It("deletes the cached result and config after the first DEL", func() {
err := ioutil.WriteFile(resultCacheFile, []byte(`{
"cniVersion": "0.4.0",
"ips": [{"version": "4", "address": "10.1.2.3/24"}],
"dns": {}
}`), 0600)
Expect(err).NotTo(HaveOccurred())
err = cniConfig.DelNetwork(ctx, netConfig, runtimeConfig)
Expect(err).NotTo(HaveOccurred())
_, err = ioutil.ReadFile(resultCacheFile)
Expect(err).To(HaveOccurred())
err = cniConfig.DelNetwork(ctx, netConfig, runtimeConfig)
Expect(err).NotTo(HaveOccurred())
})
})
Context("when DEL is called with a configuration version", func() {
var cacheFile string
BeforeEach(func() {
cacheFile = resultCacheFilePath(cacheDirPath, netConfig.Network.Name, runtimeConfig)
err := os.MkdirAll(filepath.Dir(cacheFile), 0700)
Expect(err).NotTo(HaveOccurred())
})
Context("less than 0.4.0", func() {
It("does not pass a prevResult to the plugin", func() {
err := ioutil.WriteFile(cacheFile, []byte(`{
"cniVersion": "0.3.1",
"ips": [{"version": "4", "address": "10.1.2.3/24"}],
"dns": {}
}`), 0600)
Expect(err).NotTo(HaveOccurred())
// Generate plugin config with older version
pluginConfig = `{
"type": "noop",
"name": "apitest",
"cniVersion": "0.3.1"
}`
netConfig, err = libcni.ConfFromBytes([]byte(pluginConfig))
Expect(err).NotTo(HaveOccurred())
err = cniConfig.DelNetwork(ctx, netConfig, runtimeConfig)
Expect(err).NotTo(HaveOccurred())
debug, err := noop_debug.ReadDebug(debugFilePath)
Expect(err).NotTo(HaveOccurred())
Expect(debug.Command).To(Equal("DEL"))
Expect(string(debug.CmdArgs.StdinData)).NotTo(ContainSubstring("\"prevResult\":"))
})
})
Context("equal to 0.4.0", func() {
It("passes a prevResult to the plugin", func() {
err := ioutil.WriteFile(cacheFile, []byte(`{
"cniVersion": "0.4.0",
"ips": [{"version": "4", "address": "10.1.2.3/24"}],
"dns": {}
}`), 0600)
Expect(err).NotTo(HaveOccurred())
err = cniConfig.DelNetwork(ctx, netConfig, runtimeConfig)
Expect(err).NotTo(HaveOccurred())
debug, err := noop_debug.ReadDebug(debugFilePath)
Expect(err).NotTo(HaveOccurred())
Expect(debug.Command).To(Equal("DEL"))
Expect(string(debug.CmdArgs.StdinData)).To(ContainSubstring("\"prevResult\":"))
})
})
})
Context("when the cached", func() {
var cacheFile string
BeforeEach(func() {
cacheFile = resultCacheFilePath(cacheDirPath, netConfig.Network.Name, runtimeConfig)
err := os.MkdirAll(filepath.Dir(cacheFile), 0700)
Expect(err).NotTo(HaveOccurred())
})
Context("result is invalid JSON", func() {
It("returns an error", func() {
err := ioutil.WriteFile(cacheFile, []byte("adfadsfasdfasfdsafaf"), 0600)
Expect(err).NotTo(HaveOccurred())
err = cniConfig.DelNetwork(ctx, netConfig, runtimeConfig)
Expect(err).To(MatchError("failed to get network \"apitest\" cached result: decoding version from network config: invalid character 'a' looking for beginning of value"))
})
})
Context("result version doesn't match the config version", func() {
It("succeeds when the cached result can be converted", func() {
err := ioutil.WriteFile(cacheFile, []byte(`{
"cniVersion": "0.3.1",
"ips": [{"version": "4", "address": "10.1.2.3/24"}],
"dns": {}
}`), 0600)
Expect(err).NotTo(HaveOccurred())
err = cniConfig.DelNetwork(ctx, netConfig, runtimeConfig)
Expect(err).NotTo(HaveOccurred())
})
It("returns an error when the cached result cannot be converted", func() {
err := ioutil.WriteFile(cacheFile, []byte(`{
"cniVersion": "0.4567.0",
"ips": [{"version": "4", "address": "10.1.2.3/24"}],
"dns": {}
}`), 0600)
Expect(err).NotTo(HaveOccurred())
err = cniConfig.DelNetwork(ctx, netConfig, runtimeConfig)
Expect(err).To(MatchError("failed to get network \"apitest\" cached result: unsupported CNI result version \"0.4567.0\""))
})
})
})
})
Describe("GetVersionInfo", func() {
It("executes the plugin with the command VERSION", func() {
versionInfo, err := cniConfig.GetVersionInfo(ctx, "noop")
Expect(err).NotTo(HaveOccurred())
Expect(versionInfo).NotTo(BeNil())
Expect(versionInfo.SupportedVersions()).To(Equal([]string{
"0.-42.0", "0.1.0", "0.2.0", "0.3.0", "0.3.1", "0.4.0",
}))
})
Context("when finding the plugin fails", func() {
It("returns the error", func() {
_, err := cniConfig.GetVersionInfo(ctx, "does-not-exist")
Expect(err).To(MatchError(ContainSubstring(`failed to find plugin "does-not-exist"`)))
})
})
})
Describe("ValidateNetwork", func() {
It("validates a good configuration", func() {
_, err := cniConfig.ValidateNetwork(ctx, netConfig)
Expect(err).NotTo(HaveOccurred())
})
It("catches non-existent plugins", func() {
netConfig.Network.Type = "nope"
_, err := cniConfig.ValidateNetwork(ctx, netConfig)
Expect(err).To(MatchError("failed to find plugin \"nope\" in path [" + cniConfig.Path[0] + "]"))
})
It("catches unsupported versions", func() {
netConfig.Network.CNIVersion = "broken"
_, err := cniConfig.ValidateNetwork(ctx, netConfig)
Expect(err).To(MatchError("plugin noop does not support config version \"broken\""))
})
It("allows version to be omitted", func() {
netConfig.Network.CNIVersion = ""
_, err := cniConfig.ValidateNetwork(ctx, netConfig)
Expect(err).NotTo(HaveOccurred())
})
})
})
Describe("Invoking a plugin list", func() {
var (
plugins []pluginInfo
cniBinPath string
cniConfig *libcni.CNIConfig
netConfigList *libcni.NetworkConfigList
runtimeConfig *libcni.RuntimeConf
ctx context.Context
ipResult string
expectedCmdArgs skel.CmdArgs
)
BeforeEach(func() {
var err error
capabilityArgs := map[string]interface{}{
"portMappings": []portMapping{
{HostPort: 8080, ContainerPort: 80, Protocol: "tcp"},
},
"otherCapability": 33,
}
cniBinPath = filepath.Dir(pluginPaths["noop"])
cniConfig = libcni.NewCNIConfigWithCacheDir([]string{cniBinPath}, cacheDirPath, nil)
runtimeConfig = &libcni.RuntimeConf{
ContainerID: "some-container-id",
NetNS: "/some/netns/path",
IfName: "some-eth0",
Args: [][2]string{{"FOO", "BAR"}},
CapabilityArgs: capabilityArgs,
}
expectedCmdArgs = skel.CmdArgs{
ContainerID: runtimeConfig.ContainerID,
Netns: runtimeConfig.NetNS,
IfName: runtimeConfig.IfName,
Args: "FOO=BAR",
Path: cniBinPath,
}
rc := map[string]interface{}{
"containerId": runtimeConfig.ContainerID,
"netNs": runtimeConfig.NetNS,
"ifName": runtimeConfig.IfName,
"args": map[string]string{
"FOO": "BAR",
},
"portMappings": capabilityArgs["portMappings"],
"otherCapability": capabilityArgs["otherCapability"],
}
ipResult = fmt.Sprintf(`{"cniVersion": "%s", "dns":{},"ips":[{"version": "4", "address": "10.1.2.3/24"}]}`, current.ImplementedSpecVersion)
plugins = make([]pluginInfo, 3)
plugins[0] = newPluginInfo("some-value", "", true, ipResult, rc, []string{"portMappings", "otherCapability"})
plugins[1] = newPluginInfo("some-other-value", ipResult, true, "PASSTHROUGH", rc, []string{"otherCapability"})
plugins[2] = newPluginInfo("yet-another-value", ipResult, true, "INJECT-DNS", rc, []string{})
configList := []byte(fmt.Sprintf(`{
"name": "some-list",
"cniVersion": "%s",
"plugins": [
%s,
%s,
%s
]
}`, current.ImplementedSpecVersion, plugins[0].config, plugins[1].config, plugins[2].config))
netConfigList, err = libcni.ConfListFromBytes(configList)
Expect(err).NotTo(HaveOccurred())
ctx = context.TODO()
})
AfterEach(func() {
for _, p := range plugins {
Expect(os.RemoveAll(p.debugFilePath)).To(Succeed())
}
})
Describe("AddNetworkList", func() {
It("executes all plugins with command ADD and returns an intermediate result", func() {
r, err := cniConfig.AddNetworkList(ctx, netConfigList, runtimeConfig)
Expect(err).NotTo(HaveOccurred())
result, err := current.GetResult(r)
Expect(err).NotTo(HaveOccurred())
Expect(result).To(Equal(¤t.Result{
CNIVersion: current.ImplementedSpecVersion,
// IP4 added by first plugin
IPs: []*current.IPConfig{
{
Version: "4",
Address: net.IPNet{
IP: net.ParseIP("10.1.2.3"),
Mask: net.IPv4Mask(255, 255, 255, 0),
},
},
},
// DNS injected by last plugin
DNS: types.DNS{
Nameservers: []string{"1.2.3.4"},
},
}))
for i := 0; i < len(plugins); i++ {
debug, err := noop_debug.ReadDebug(plugins[i].debugFilePath)
Expect(err).NotTo(HaveOccurred())
Expect(debug.Command).To(Equal("ADD"))
// Must explicitly match JSON due to dict element ordering
Expect(debug.CmdArgs.StdinData).To(MatchJSON(plugins[i].stdinData))
debug.CmdArgs.StdinData = nil
Expect(debug.CmdArgs).To(Equal(expectedCmdArgs))
}
})
It("writes the correct cached result", func() {
r, err := cniConfig.AddNetworkList(ctx, netConfigList, runtimeConfig)
Expect(err).NotTo(HaveOccurred())
result, err := current.GetResult(r)
Expect(err).NotTo(HaveOccurred())
// Ensure the cached result matches the returned one
cachedResult, err := cniConfig.GetNetworkListCachedResult(netConfigList, runtimeConfig)
Expect(err).NotTo(HaveOccurred())
result2, err := current.GetResult(cachedResult)
Expect(err).NotTo(HaveOccurred())
cachedJson, err := json.Marshal(result2)
Expect(err).NotTo(HaveOccurred())
returnedJson, err := json.Marshal(result)
Expect(err).NotTo(HaveOccurred())
Expect(cachedJson).To(MatchJSON(returnedJson))
})
It("writes the correct cached config", func() {
_, err := cniConfig.AddNetworkList(ctx, netConfigList, runtimeConfig)
Expect(err).NotTo(HaveOccurred())
// Ensure the cached config matches the returned one
cachedConfig, newRt, err := cniConfig.GetNetworkListCachedConfig(netConfigList, runtimeConfig)
Expect(err).NotTo(HaveOccurred())
Expect(bytes.Equal(cachedConfig, netConfigList.Bytes)).To(BeTrue())
Expect(reflect.DeepEqual(newRt.Args, runtimeConfig.Args)).To(BeTrue())
// CapabilityArgs are freeform, so we have to match their JSON not
// the Go structs (which could be unmarshalled differently than the
// struct that was marshalled).
expectedCABytes, err := json.Marshal(runtimeConfig.CapabilityArgs)
Expect(err).NotTo(HaveOccurred())
foundCABytes, err := json.Marshal(newRt.CapabilityArgs)
Expect(err).NotTo(HaveOccurred())
Expect(foundCABytes).To(MatchJSON(expectedCABytes))