package main import ( "bufio" "crypto/tls" "errors" "flag" "fmt" "git.curoverse.com/arvados.git/sdk/go/arvadosclient" "git.curoverse.com/arvados.git/sdk/go/keepclient" "io/ioutil" "log" "net/http" "os" "regexp" "strings" "time" ) func main() { err := doMain() if err != nil { log.Fatalf("%v", err) } } func doMain() error { flags := flag.NewFlagSet("keep-rsync", flag.ExitOnError) srcConfigFile := flags.String( "src", "", "Source configuration filename. May be either a pathname to a config file, or (for example) 'foo' as shorthand for $HOME/.config/arvados/foo.conf file. This file is expected to specify the values for ARVADOS_API_TOKEN, ARVADOS_API_HOST, ARVADOS_API_HOST_INSECURE, and ARVADOS_BLOB_SIGNING_KEY for the source.") dstConfigFile := flags.String( "dst", "", "Destination configuration filename. May be either a pathname to a config file, or (for example) 'foo' as shorthand for $HOME/.config/arvados/foo.conf file. This file is expected to specify the values for ARVADOS_API_TOKEN, ARVADOS_API_HOST, and ARVADOS_API_HOST_INSECURE for the destination.") srcKeepServicesJSON := flags.String( "src-keep-services-json", "", "An optional list of available source keepservices. "+ "If not provided, this list is obtained from api server configured in src-config-file.") dstKeepServicesJSON := flags.String( "dst-keep-services-json", "", "An optional list of available destination keepservices. "+ "If not provided, this list is obtained from api server configured in dst-config-file.") replications := flags.Int( "replications", 0, "Number of replications to write to the destination. If replications not specified, "+ "default replication level configured on destination server will be used.") prefix := flags.String( "prefix", "", "Index prefix") srcBlobSignatureTTLFlag := flags.Duration( "src-blob-signature-ttl", 0, "Lifetime of blob permission signatures on source keepservers. If not provided, this will be retrieved from the API server's discovery document.") // Parse args; omit the first arg which is the command name flags.Parse(os.Args[1:]) srcConfig, srcBlobSigningKey, err := loadConfig(*srcConfigFile) if err != nil { return fmt.Errorf("Error loading src configuration from file: %s", err.Error()) } dstConfig, _, err := loadConfig(*dstConfigFile) if err != nil { return fmt.Errorf("Error loading dst configuration from file: %s", err.Error()) } // setup src and dst keepclients kcSrc, srcBlobSignatureTTL, err := setupKeepClient(srcConfig, *srcKeepServicesJSON, false, 0, *srcBlobSignatureTTLFlag) if err != nil { return fmt.Errorf("Error configuring src keepclient: %s", err.Error()) } kcDst, _, err := setupKeepClient(dstConfig, *dstKeepServicesJSON, true, *replications, 0) if err != nil { return fmt.Errorf("Error configuring dst keepclient: %s", err.Error()) } // Copy blocks not found in dst from src err = performKeepRsync(kcSrc, kcDst, srcBlobSignatureTTL, srcBlobSigningKey, *prefix) if err != nil { return fmt.Errorf("Error while syncing data: %s", err.Error()) } return nil } type apiConfig struct { APIToken string APIHost string APIHostInsecure bool ExternalClient bool } // Load src and dst config from given files func loadConfig(configFile string) (config apiConfig, blobSigningKey string, err error) { if configFile == "" { return config, blobSigningKey, errors.New("config file not specified") } config, blobSigningKey, err = readConfigFromFile(configFile) if err != nil { return config, blobSigningKey, fmt.Errorf("Error reading config file: %v", err) } return } var matchTrue = regexp.MustCompile("^(?i:1|yes|true)$") // Read config from file func readConfigFromFile(filename string) (config apiConfig, blobSigningKey string, err error) { if !strings.Contains(filename, "/") { filename = os.Getenv("HOME") + "/.config/arvados/" + filename + ".conf" } content, err := ioutil.ReadFile(filename) if err != nil { return config, "", err } lines := strings.Split(string(content), "\n") for _, line := range lines { if line == "" { continue } kv := strings.SplitN(line, "=", 2) key := strings.TrimSpace(kv[0]) value := strings.TrimSpace(kv[1]) switch key { case "ARVADOS_API_TOKEN": config.APIToken = value case "ARVADOS_API_HOST": config.APIHost = value case "ARVADOS_API_HOST_INSECURE": config.APIHostInsecure = matchTrue.MatchString(value) case "ARVADOS_EXTERNAL_CLIENT": config.ExternalClient = matchTrue.MatchString(value) case "ARVADOS_BLOB_SIGNING_KEY": blobSigningKey = value } } return } // setup keepclient using the config provided func setupKeepClient(config apiConfig, keepServicesJSON string, isDst bool, replications int, srcBlobSignatureTTL time.Duration) (kc *keepclient.KeepClient, blobSignatureTTL time.Duration, err error) { arv := arvadosclient.ArvadosClient{ ApiToken: config.APIToken, ApiServer: config.APIHost, ApiInsecure: config.APIHostInsecure, Client: &http.Client{Transport: &http.Transport{ TLSClientConfig: &tls.Config{InsecureSkipVerify: config.APIHostInsecure}}}, External: config.ExternalClient, } // if keepServicesJSON is provided, use it to load services; else, use DiscoverKeepServers if keepServicesJSON == "" { kc, err = keepclient.MakeKeepClient(&arv) if err != nil { return nil, 0, err } } else { kc = keepclient.New(&arv) err = kc.LoadKeepServicesFromJSON(keepServicesJSON) if err != nil { return kc, 0, err } } if isDst { // Get default replications value from destination, if it is not already provided if replications == 0 { value, err := arv.Discovery("defaultCollectionReplication") if err == nil { replications = int(value.(float64)) } else { return nil, 0, err } } kc.Want_replicas = replications } // If srcBlobSignatureTTL is not provided, get it from API server discovery doc blobSignatureTTL = srcBlobSignatureTTL if !isDst && srcBlobSignatureTTL == 0 { value, err := arv.Discovery("blobSignatureTtl") if err == nil { blobSignatureTTL = time.Duration(int(value.(float64))) * time.Second } else { return nil, 0, err } } return kc, blobSignatureTTL, nil } // Get unique block locators from src and dst // Copy any blocks missing in dst func performKeepRsync(kcSrc, kcDst *keepclient.KeepClient, srcBlobSignatureTTL time.Duration, blobSigningKey, prefix string) error { // Get unique locators from src srcIndex, err := getUniqueLocators(kcSrc, prefix) if err != nil { return err } // Get unique locators from dst dstIndex, err := getUniqueLocators(kcDst, prefix) if err != nil { return err } // Get list of locators found in src, but missing in dst toBeCopied := getMissingLocators(srcIndex, dstIndex) // Copy each missing block to dst log.Printf("Before keep-rsync, there are %d blocks in src and %d blocks in dst. Start copying %d blocks from src not found in dst.", len(srcIndex), len(dstIndex), len(toBeCopied)) err = copyBlocksToDst(toBeCopied, kcSrc, kcDst, srcBlobSignatureTTL, blobSigningKey) return err } // Get list of unique locators from the specified cluster func getUniqueLocators(kc *keepclient.KeepClient, prefix string) (map[string]bool, error) { uniqueLocators := map[string]bool{} // Get index and dedup for uuid := range kc.LocalRoots() { reader, err := kc.GetIndex(uuid, prefix) if err != nil { return uniqueLocators, err } scanner := bufio.NewScanner(reader) for scanner.Scan() { uniqueLocators[strings.Split(scanner.Text(), " ")[0]] = true } } return uniqueLocators, nil } // Get list of locators that are in src but not in dst func getMissingLocators(srcLocators, dstLocators map[string]bool) []string { var missingLocators []string for locator := range srcLocators { if _, ok := dstLocators[locator]; !ok { missingLocators = append(missingLocators, locator) } } return missingLocators } // Copy blocks from src to dst; only those that are missing in dst are copied func copyBlocksToDst(toBeCopied []string, kcSrc, kcDst *keepclient.KeepClient, srcBlobSignatureTTL time.Duration, blobSigningKey string) error { total := len(toBeCopied) startedAt := time.Now() for done, locator := range toBeCopied { if done == 0 { log.Printf("Copying data block %d of %d (%.2f%% done): %v", done+1, total, float64(done)/float64(total)*100, locator) } else { timePerBlock := time.Since(startedAt) / time.Duration(done) log.Printf("Copying data block %d of %d (%.2f%% done, %v est. time remaining): %v", done+1, total, float64(done)/float64(total)*100, timePerBlock*time.Duration(total-done), locator) } getLocator := locator expiresAt := time.Now().AddDate(0, 0, 1) if blobSigningKey != "" { getLocator = keepclient.SignLocator(getLocator, kcSrc.Arvados.ApiToken, expiresAt, srcBlobSignatureTTL, []byte(blobSigningKey)) } reader, len, _, err := kcSrc.Get(getLocator) if err != nil { return fmt.Errorf("Error getting block: %v %v", locator, err) } _, _, err = kcDst.PutHR(getLocator[:32], reader, len) if err != nil { return fmt.Errorf("Error copying data block: %v %v", locator, err) } } log.Printf("Successfully copied to destination %d blocks.", total) return nil }