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1. move prefetchfiles out of States struct 2. use go-toml package to read configuration file 3. make sure every container can get correct prefetchfiles
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,222 @@ | ||
| /* | ||
| * Copyright (c) 2023. Nydus Developers. All rights reserved. | ||
| * | ||
| * SPDX-License-Identifier: Apache-2.0 | ||
| */ | ||
|
|
||
| package main | ||
|
|
||
| import ( | ||
| "bytes" | ||
| "context" | ||
| "encoding/json" | ||
| "fmt" | ||
| "io" | ||
| "log/syslog" | ||
| "net" | ||
| "net/http" | ||
| "os" | ||
| "path/filepath" | ||
|
|
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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/pkg/prefetch" | ||
| "github.com/containerd/nydus-snapshotter/version" | ||
| ) | ||
|
|
||
| const ( | ||
| endpointPrefetch = "/api/v1/prefetch" | ||
| defaultEvents = "RunPodSandbox" | ||
| defaultSystemControllerAddress = "/run/containerd-nydus/system.sock" | ||
| nydusPrefetchAnnotation = "containerd.io/nydus-prefetch" | ||
| imageAddressAnnotation = "containerd.io/nydus-image-reference" | ||
| ) | ||
|
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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 prefetch.MessagePrefetch, endpoint, sock string) error { | ||
| url := fmt.Sprintf("http://unix%s", endpoint) | ||
|
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| body, err := json.Marshal(data) | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
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| req, err := http.NewRequest(http.MethodPut, url, bytes.NewBuffer(body)) | ||
| 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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| imageAddress, ok := pod.Annotations[imageAddressAnnotation] | ||
| if !ok { | ||
| return nil | ||
| } | ||
| msg := prefetch.MessagePrefetch{ | ||
| ImageReference: imageAddress, | ||
| PrefetchFiles: prefetchList, | ||
| } | ||
|
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| err := sendDataOverHTTP(msg, endpointPrefetch, globalSocket) | ||
| if err != nil { | ||
| log.Errorf("failed to send data: %v\n", 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" | ||
| configPath := "." | ||
| configFilePath := filepath.Join(configPath, configFileName) | ||
|
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| config, err := toml.LoadFile(configFilePath) | ||
| if err != nil { | ||
| log.Warnf("failed to read config file: %v", err) | ||
| } | ||
| if configSocketAddr := config.Get("file_prefetch.socket_address").(string); configSocketAddr != "" { | ||
| globalSocket = configSocketAddr | ||
| } 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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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,3 @@ | ||
| [file_prefetch] | ||
| # This is used to configure the socket address for the file prefetch. | ||
| socket_address = "/run/containerd-nydus/system.sock" |
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