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1. add licence claim in prefetch.go 2. replace global variables in prefetch.go with structures 3. locked when accessong prefetchMap 4. add logic to handle type assertion 5. move NRI plugin config file to misc/nri-prefetch 6. and so on
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,211 @@ | ||
| /* | ||
| * Copyright (c) 2023. Nydus Developers. All rights reserved. | ||
| * | ||
| * SPDX-License-Identifier: Apache-2.0 | ||
| */ | ||
|
|
||
| package main | ||
|
|
||
| import ( | ||
| "context" | ||
| "fmt" | ||
| "io" | ||
| "log/syslog" | ||
| "net" | ||
| "net/http" | ||
| "os" | ||
| "path/filepath" | ||
| "strings" | ||
|
|
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| "github.com/containerd/nri/pkg/api" | ||
| "github.com/containerd/nri/pkg/stub" | ||
| "github.com/pelletier/go-toml" | ||
| "github.com/pkg/errors" | ||
| "github.com/sirupsen/logrus" | ||
| "github.com/urfave/cli/v2" | ||
|
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| "github.com/containerd/nydus-snapshotter/pkg/errdefs" | ||
| "github.com/containerd/nydus-snapshotter/version" | ||
| ) | ||
|
|
||
| const ( | ||
| endpointPrefetch = "/api/v1/prefetch" | ||
| defaultEvents = "RunPodSandbox" | ||
| defaultSystemControllerAddress = "/run/containerd-nydus/system.sock" | ||
| nydusPrefetchAnnotation = "containerd.io/nydus-prefetch" | ||
| ) | ||
|
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| type PluginArgs struct { | ||
| PluginName string | ||
| PluginIdx string | ||
| SocketAddress string | ||
| } | ||
|
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| type Flags struct { | ||
| Args *PluginArgs | ||
| Flag []cli.Flag | ||
| } | ||
|
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| func buildFlags(args *PluginArgs) []cli.Flag { | ||
| return []cli.Flag{ | ||
| &cli.StringFlag{ | ||
| Name: "name", | ||
| Usage: "plugin name to register to NRI", | ||
| Destination: &args.PluginName, | ||
| }, | ||
| &cli.StringFlag{ | ||
| Name: "idx", | ||
| Usage: "plugin index to register to NRI", | ||
| Destination: &args.PluginIdx, | ||
| }, | ||
| &cli.StringFlag{ | ||
| Name: "socket-addr", | ||
| Value: defaultSystemControllerAddress, | ||
| Usage: "unix domain socket address. If defined in the configuration file, there is no need to add ", | ||
| Destination: &args.SocketAddress, | ||
| }, | ||
| } | ||
| } | ||
|
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| func NewPluginFlags() *Flags { | ||
| var args PluginArgs | ||
| return &Flags{ | ||
| Args: &args, | ||
| Flag: buildFlags(&args), | ||
| } | ||
| } | ||
|
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| type plugin struct { | ||
| stub stub.Stub | ||
| mask stub.EventMask | ||
| } | ||
|
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| var ( | ||
| globalSocket string | ||
| log *logrus.Logger | ||
| logWriter *syslog.Writer | ||
| ) | ||
|
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| // sendDataOverHTTP sends the prefetch data to the specified endpoint over HTTP using a Unix socket. | ||
| func sendDataOverHTTP(data string, endpoint, sock string) error { | ||
| url := fmt.Sprintf("http://unix%s", endpoint) | ||
|
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| req, err := http.NewRequest(http.MethodPut, url, strings.NewReader(data)) | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
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| client := &http.Client{ | ||
| Transport: &http.Transport{ | ||
| DialContext: func(_ context.Context, _, _ string) (net.Conn, error) { | ||
| return net.Dial("unix", sock) | ||
| }, | ||
| }, | ||
| } | ||
| resp, err := client.Do(req) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| if resp.StatusCode != http.StatusOK { | ||
| return fmt.Errorf("failed to send data, status code: %d", resp.StatusCode) | ||
| } | ||
| resp.Body.Close() | ||
|
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| return nil | ||
| } | ||
|
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| func (p *plugin) RunPodSandbox(pod *api.PodSandbox) error { | ||
| prefetchList, ok := pod.Annotations[nydusPrefetchAnnotation] | ||
| if !ok { | ||
| return nil | ||
| } | ||
|
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| err := sendDataOverHTTP(prefetchList, endpointPrefetch, globalSocket) | ||
| if err != nil { | ||
| log.Errorf("failed to send data: %v", err) | ||
| return err | ||
| } | ||
|
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| return nil | ||
| } | ||
|
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| func main() { | ||
|
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| flags := NewPluginFlags() | ||
|
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| app := &cli.App{ | ||
| Name: "prefetch-nri-plugin", | ||
| Usage: "NRI plugin for obtaining and transmitting prefetch files path", | ||
| Version: version.Version, | ||
| Flags: flags.Flag, | ||
| HideVersion: true, | ||
| Action: func(c *cli.Context) error { | ||
| var ( | ||
| opts []stub.Option | ||
| err error | ||
| ) | ||
|
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| log = logrus.StandardLogger() | ||
|
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| configFileName := "prefetchConfig.toml" | ||
| configDir := "../../misc/nri-prefetch" | ||
| configFilePath := filepath.Join(configDir, configFileName) | ||
|
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| config, err := toml.LoadFile(configFilePath) | ||
| if err != nil { | ||
| log.Warnf("failed to read config file: %v", err) | ||
| } | ||
|
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| configSocketAddrRaw := config.Get("file_prefetch.socket_address") | ||
| if configSocketAddrRaw != nil { | ||
| if configSocketAddr, ok := configSocketAddrRaw.(string); ok { | ||
| globalSocket = configSocketAddr | ||
| } else { | ||
| log.Warnf("failed to read config: 'file_prefetch.socket_address' is not a string") | ||
| } | ||
| } else { | ||
| globalSocket = flags.Args.SocketAddress | ||
| } | ||
|
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| log.SetFormatter(&logrus.TextFormatter{ | ||
| PadLevelText: true, | ||
| }) | ||
| logWriter, err = syslog.New(syslog.LOG_INFO, "prefetch-nri-plugin") | ||
|
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| if err == nil { | ||
| log.SetOutput(io.MultiWriter(os.Stdout, logWriter)) | ||
| } | ||
|
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| if flags.Args.PluginName != "" { | ||
| opts = append(opts, stub.WithPluginName(flags.Args.PluginName)) | ||
| } | ||
| if flags.Args.PluginIdx != "" { | ||
| opts = append(opts, stub.WithPluginIdx(flags.Args.PluginIdx)) | ||
| } | ||
|
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| p := &plugin{} | ||
|
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| if p.mask, err = api.ParseEventMask(defaultEvents); err != nil { | ||
| log.Fatalf("failed to parse events: %v", err) | ||
| } | ||
|
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| if p.stub, err = stub.New(p, opts...); err != nil { | ||
| log.Fatalf("failed to create plugin stub: %v", err) | ||
| } | ||
|
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| err = p.stub.Run(context.Background()) | ||
| if err != nil { | ||
| return errors.Wrap(err, "plugin exited") | ||
| } | ||
| return nil | ||
| }, | ||
| } | ||
| if err := app.Run(os.Args); err != nil { | ||
|
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| if errdefs.IsConnectionClosed(err) { | ||
| log.Info("prefetch NRI plugin exited") | ||
| } else { | ||
| log.WithError(err).Fatal("failed to start prefetch NRI plugin") | ||
| } | ||
| } | ||
| } |
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