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package command
import (
"context"
"fmt"
"github.com/chrislusf/seaweedfs/weed/pb"
"github.com/golang/protobuf/jsonpb"
jsoniter "github.com/json-iterator/go"
"github.com/olivere/elastic/v7"
"os"
"path/filepath"
"strings"
"time"
"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
"github.com/chrislusf/seaweedfs/weed/security"
"github.com/chrislusf/seaweedfs/weed/util"
)
func init() {
cmdFilerMetaTail.Run = runFilerMetaTail // break init cycle
}
var cmdFilerMetaTail = &Command{
UsageLine: "filer.meta.tail [-filer=localhost:8888] [-pathPrefix=/]",
Short: "see continuous changes on a filer",
Long: `See continuous changes on a filer.
weed filer.meta.tail -timeAgo=30h | grep truncate
weed filer.meta.tail -timeAgo=30h | jq .
weed filer.meta.tail -timeAgo=30h | jq .eventNotification.newEntry.name
`,
}
var (
tailFiler = cmdFilerMetaTail.Flag.String("filer", "localhost:8888", "filer hostname:port")
tailTarget = cmdFilerMetaTail.Flag.String("pathPrefix", "/", "path to a folder or common prefix for the folders or files on filer")
tailStart = cmdFilerMetaTail.Flag.Duration("timeAgo", 0, "start time before now. \"300ms\", \"1.5h\" or \"2h45m\". Valid time units are \"ns\", \"us\" (or \"µs\"), \"ms\", \"s\", \"m\", \"h\"")
tailPattern = cmdFilerMetaTail.Flag.String("pattern", "", "full path or just filename pattern, ex: \"/home/?opher\", \"*.pdf\", see https://golang.org/pkg/path/filepath/#Match ")
esServers = cmdFilerMetaTail.Flag.String("es", "", "comma-separated elastic servers http://<host:port>")
esIndex = cmdFilerMetaTail.Flag.String("es.index", "seaweedfs", "ES index name")
)
func runFilerMetaTail(cmd *Command, args []string) bool {
util.LoadConfiguration("security", false)
grpcDialOption := security.LoadClientTLS(util.GetViper(), "grpc.client")
var filterFunc func(dir, fname string) bool
if *tailPattern != "" {
if strings.Contains(*tailPattern, "/") {
println("watch path pattern", *tailPattern)
filterFunc = func(dir, fname string) bool {
matched, err := filepath.Match(*tailPattern, dir+"/"+fname)
if err != nil {
fmt.Printf("error: %v", err)
}
return matched
}
} else {
println("watch file pattern", *tailPattern)
filterFunc = func(dir, fname string) bool {
matched, err := filepath.Match(*tailPattern, fname)
if err != nil {
fmt.Printf("error: %v", err)
}
return matched
}
}
}
shouldPrint := func(resp *filer_pb.SubscribeMetadataResponse) bool {
if filterFunc == nil {
return true
}
if resp.EventNotification.OldEntry == nil && resp.EventNotification.NewEntry == nil {
return false
}
if resp.EventNotification.OldEntry != nil && filterFunc(resp.Directory, resp.EventNotification.OldEntry.Name) {
return true
}
if resp.EventNotification.NewEntry != nil && filterFunc(resp.EventNotification.NewParentPath, resp.EventNotification.NewEntry.Name) {
return true
}
return false
}
jsonpbMarshaler := jsonpb.Marshaler{
EmitDefaults: false,
}
eachEntryFunc := func(resp *filer_pb.SubscribeMetadataResponse) error {
jsonpbMarshaler.Marshal(os.Stdout, resp)
fmt.Fprintln(os.Stdout)
return nil
}
if *esServers != "" {
var err error
eachEntryFunc, err = sendToElasticSearchFunc(*esServers, *esIndex)
if err != nil {
fmt.Printf("create elastic search client to %s: %+v\n", *esServers, err)
return false
}
}
tailErr := pb.FollowMetadata(*tailFiler, grpcDialOption, "tail",
*tailTarget, time.Now().Add(-*tailStart).UnixNano(), 0,
func(resp *filer_pb.SubscribeMetadataResponse) error {
if !shouldPrint(resp) {
return nil
}
if err := eachEntryFunc(resp); err != nil {
return err
}
return nil
}, false)
if tailErr != nil {
fmt.Printf("tail %s: %v\n", *tailFiler, tailErr)
}
return true
}
type EsDocument struct {
Dir string `json:"dir,omitempty"`
Name string `json:"name,omitempty"`
IsDirectory bool `json:"isDir,omitempty"`
Size uint64 `json:"size,omitempty"`
Uid uint32 `json:"uid,omitempty"`
Gid uint32 `json:"gid,omitempty"`
UserName string `json:"userName,omitempty"`
Collection string `json:"collection,omitempty"`
Crtime int64 `json:"crtime,omitempty"`
Mtime int64 `json:"mtime,omitempty"`
Mime string `json:"mime,omitempty"`
}
func toEsEntry(event *filer_pb.EventNotification) (*EsDocument, string) {
entry := event.NewEntry
dir, name := event.NewParentPath, entry.Name
id := util.Md5String([]byte(util.NewFullPath(dir, name)))
esEntry := &EsDocument{
Dir: dir,
Name: name,
IsDirectory: entry.IsDirectory,
Size: entry.Attributes.FileSize,
Uid: entry.Attributes.Uid,
Gid: entry.Attributes.Gid,
UserName: entry.Attributes.UserName,
Collection: entry.Attributes.Collection,
Crtime: entry.Attributes.Crtime,
Mtime: entry.Attributes.Mtime,
Mime: entry.Attributes.Mime,
}
return esEntry, id
}
func sendToElasticSearchFunc(servers string, esIndex string) (func(resp *filer_pb.SubscribeMetadataResponse) error, error) {
options := []elastic.ClientOptionFunc{}
options = append(options, elastic.SetURL(strings.Split(servers, ",")...))
options = append(options, elastic.SetSniff(false))
options = append(options, elastic.SetHealthcheck(false))
client, err := elastic.NewClient(options...)
if err != nil {
return nil, err
}
return func(resp *filer_pb.SubscribeMetadataResponse) error {
event := resp.EventNotification
if event.OldEntry != nil &&
(event.NewEntry == nil || resp.Directory != event.NewParentPath || event.OldEntry.Name != event.NewEntry.Name) {
// delete or not update the same file
dir, name := resp.Directory, event.OldEntry.Name
id := util.Md5String([]byte(util.NewFullPath(dir, name)))
println("delete", id)
_, err := client.Delete().Index(esIndex).Id(id).Do(context.Background())
return err
}
if event.NewEntry != nil {
// add a new file or update the same file
esEntry, id := toEsEntry(event)
value, err := jsoniter.Marshal(esEntry)
if err != nil {
return err
}
println(string(value))
_, err = client.Index().Index(esIndex).Id(id).BodyJson(string(value)).Do(context.Background())
return err
}
return nil
}, nil
}
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