package main
import (
+ "bufio"
+ "errors"
"flag"
+ "fmt"
"git.curoverse.com/arvados.git/sdk/go/arvadosclient"
"git.curoverse.com/arvados.git/sdk/go/keepclient"
"io/ioutil"
"log"
"regexp"
"strings"
+ "time"
)
// keep-rsync arguments
var (
- srcConfig arvadosclient.APIConfig
- dstConfig arvadosclient.APIConfig
- blobSigningKey string
- srcKeepServicesJSON string
- dstKeepServicesJSON string
- replications int
- prefix string
+ blobSigningKey string
)
func main() {
- var srcConfigFile string
- var dstConfigFile string
+ var srcConfigFile, dstConfigFile, srcKeepServicesJSON, dstKeepServicesJSON, prefix string
+ var replications int
flag.StringVar(
&srcConfigFile,
flag.Parse()
- var err error
+ srcConfig, dstConfig, err := loadConfig(srcConfigFile, dstConfigFile)
+ if err != nil {
+ log.Fatalf("Error loading configuration from files: %s", err.Error())
+ }
+
+ // setup src and dst keepclients
+ kcSrc, kcDst, err := setupKeepClients(srcConfig, dstConfig, srcKeepServicesJSON, dstKeepServicesJSON, replications)
+ if err != nil {
+ log.Fatalf("Error configuring keep-rsync: %s", err.Error())
+ }
+
+ // Copy blocks not found in dst from src
+ err = performKeepRsync(kcSrc, kcDst, prefix)
+ if err != nil {
+ log.Fatalf("Error while syncing data: %s", err.Error())
+ }
+}
- // Load config
+// Load src and dst config from given files
+func loadConfig(srcConfigFile, dstConfigFile string) (srcConfig, dstConfig arvadosclient.APIConfig, err error) {
if srcConfigFile == "" {
- log.Fatal("-src-config-file must be specified.")
+ return srcConfig, dstConfig, errors.New("-src-config-file must be specified")
}
+
srcConfig, err = readConfigFromFile(srcConfigFile)
if err != nil {
- log.Fatal("Error reading source configuration: %s", err.Error())
+ return srcConfig, dstConfig, fmt.Errorf("Error reading source configuration: %v", err)
}
if dstConfigFile == "" {
- log.Fatal("-dst-config-file must be specified.")
+ return srcConfig, dstConfig, errors.New("-dst-config-file must be specified")
}
dstConfig, err = readConfigFromFile(dstConfigFile)
if err != nil {
- log.Fatal("Error reading destination configuration: %s", err.Error())
+ return srcConfig, dstConfig, fmt.Errorf("Error reading destination configuration: %v", err)
}
- // Initialize keep-rsync
- err = initializeKeepRsync()
- if err != nil {
- log.Fatal("Error configurating keep-rsync: %s", err.Error())
- }
+ return srcConfig, dstConfig, err
}
var matchTrue = regexp.MustCompile("^(?i:1|yes|true)$")
-// Reads config from file
+// Read config from file
func readConfigFromFile(filename string) (arvadosclient.APIConfig, error) {
var config arvadosclient.APIConfig
if line == "" {
continue
}
- kv := strings.Split(line, "=")
- switch kv[0] {
+ kv := strings.SplitN(line, "=", 2)
+ key := strings.TrimSpace(kv[0])
+ value := strings.TrimSpace(kv[1])
+
+ switch key {
case "ARVADOS_API_TOKEN":
- config.APIToken = kv[1]
+ config.APIToken = value
case "ARVADOS_API_HOST":
- config.APIHost = kv[1]
+ config.APIHost = value
case "ARVADOS_API_HOST_INSECURE":
- config.APIHostInsecure = matchTrue.MatchString(kv[1])
+ config.APIHostInsecure = matchTrue.MatchString(value)
case "ARVADOS_EXTERNAL_CLIENT":
- config.ExternalClient = matchTrue.MatchString(kv[1])
+ config.ExternalClient = matchTrue.MatchString(value)
case "ARVADOS_BLOB_SIGNING_KEY":
- blobSigningKey = kv[1]
+ blobSigningKey = value
}
}
return config, nil
}
-// keep-rsync source and destination clients
-var (
- arvSrc arvadosclient.ArvadosClient
- arvDst arvadosclient.ArvadosClient
- kcSrc *keepclient.KeepClient
- kcDst *keepclient.KeepClient
-)
-
// Initializes keep-rsync using the config provided
-func initializeKeepRsync() (err error) {
+func setupKeepClients(srcConfig, dstConfig arvadosclient.APIConfig, srcKeepServicesJSON, dstKeepServicesJSON string, replications int) (kcSrc, kcDst *keepclient.KeepClient, err error) {
// arvSrc from srcConfig
- arvSrc, err = arvadosclient.New(srcConfig)
+ arvSrc, err := arvadosclient.New(srcConfig)
if err != nil {
- return
+ return kcSrc, kcDst, err
}
// arvDst from dstConfig
- arvDst, err = arvadosclient.New(dstConfig)
+ arvDst, err := arvadosclient.New(dstConfig)
if err != nil {
- return
+ return kcSrc, kcDst, err
}
// Get default replications value from destination, if it is not already provided
if srcKeepServicesJSON == "" {
kcSrc, err = keepclient.MakeKeepClient(&arvSrc)
if err != nil {
- return
+ return nil, nil, err
}
} else {
kcSrc, err = keepclient.MakeKeepClientFromJSON(&arvSrc, srcKeepServicesJSON)
if err != nil {
- return
+ return kcSrc, kcDst, err
}
}
if dstKeepServicesJSON == "" {
kcDst, err = keepclient.MakeKeepClient(&arvDst)
if err != nil {
- return
+ return kcSrc, kcDst, err
}
} else {
kcDst, err = keepclient.MakeKeepClientFromJSON(&arvDst, dstKeepServicesJSON)
if err != nil {
- return
+ return kcSrc, kcDst, err
}
}
kcDst.Want_replicas = replications
- return
+ return kcSrc, kcDst, nil
+}
+
+// Get unique block locators from src and dst
+// Copy any blocks missing in dst
+func performKeepRsync(kcSrc, kcDst *keepclient.KeepClient, 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
+ err = copyBlocksToDst(toBeCopied, kcSrc, kcDst)
+
+ 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) error {
+ done := 0
+ total := len(toBeCopied)
+
+ for _, locator := range toBeCopied {
+ log.Printf("Getting block %d of %d: %v", done+1, total, locator)
+
+ getLocator := locator
+ expiresAt := time.Now().AddDate(0, 0, 1)
+ if blobSigningKey != "" {
+ getLocator = keepclient.SignLocator(getLocator, kcSrc.Arvados.ApiToken, expiresAt, []byte(blobSigningKey))
+ }
+
+ reader, _, _, err := kcSrc.Get(getLocator)
+ if err != nil {
+ return fmt.Errorf("Error getting block: %v %v", locator, err)
+ }
+ data, err := ioutil.ReadAll(reader)
+ if err != nil {
+ return fmt.Errorf("Error reading block data: %v %v", locator, err)
+ }
+
+ log.Printf("Writing block%d of %d: %v", locator)
+ _, _, err = kcDst.PutB(data)
+ if err != nil {
+ return fmt.Errorf("Error putting block data: %v %v", locator, err)
+ }
+
+ done++
+ log.Printf("%.2f%% done", float64(done)/float64(total)*100)
+ }
+
+ log.Printf("Successfully copied to destination %d blocks.", total)
+ return nil
}
projects / arvados.git / blobdiff