1 // Copyright (C) The Arvados Authors. All rights reserved.
3 // SPDX-License-Identifier: AGPL-3.0
20 "git.arvados.org/arvados.git/sdk/go/arvadosclient"
21 "git.arvados.org/arvados.git/sdk/go/keepclient"
34 flags := flag.NewFlagSet("keep-rsync", flag.ExitOnError)
36 srcConfigFile := flags.String(
39 "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.")
41 dstConfigFile := flags.String(
44 "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.")
46 srcKeepServicesJSON := flags.String(
47 "src-keep-services-json",
49 "An optional list of available source keepservices. "+
50 "If not provided, this list is obtained from api server configured in src-config-file.")
52 dstKeepServicesJSON := flags.String(
53 "dst-keep-services-json",
55 "An optional list of available destination keepservices. "+
56 "If not provided, this list is obtained from api server configured in dst-config-file.")
58 replications := flags.Int(
61 "Number of replications to write to the destination. If replications not specified, "+
62 "default replication level configured on destination server will be used.")
64 prefix := flags.String(
69 srcBlobSignatureTTLFlag := flags.Duration(
70 "src-blob-signature-ttl",
72 "Lifetime of blob permission signatures on source keepservers. If not provided, this will be retrieved from the API server's discovery document.")
74 getVersion := flags.Bool(
77 "Print version information and exit.")
79 // Parse args; omit the first arg which is the command name
80 flags.Parse(os.Args[1:])
82 // Print version information if requested
84 fmt.Printf("keep-rsync %s\n", version)
88 srcConfig, srcBlobSigningKey, err := loadConfig(*srcConfigFile)
90 return fmt.Errorf("Error loading src configuration from file: %s", err.Error())
93 dstConfig, _, err := loadConfig(*dstConfigFile)
95 return fmt.Errorf("Error loading dst configuration from file: %s", err.Error())
98 // setup src and dst keepclients
99 kcSrc, srcBlobSignatureTTL, err := setupKeepClient(srcConfig, *srcKeepServicesJSON, false, 0, *srcBlobSignatureTTLFlag)
101 return fmt.Errorf("Error configuring src keepclient: %s", err.Error())
104 kcDst, _, err := setupKeepClient(dstConfig, *dstKeepServicesJSON, true, *replications, 0)
106 return fmt.Errorf("Error configuring dst keepclient: %s", err.Error())
109 // Copy blocks not found in dst from src
110 err = performKeepRsync(kcSrc, kcDst, srcBlobSignatureTTL, srcBlobSigningKey, *prefix)
112 return fmt.Errorf("Error while syncing data: %s", err.Error())
118 type apiConfig struct {
125 // Load src and dst config from given files
126 func loadConfig(configFile string) (config apiConfig, blobSigningKey string, err error) {
127 if configFile == "" {
128 return config, blobSigningKey, errors.New("config file not specified")
131 config, blobSigningKey, err = readConfigFromFile(configFile)
133 return config, blobSigningKey, fmt.Errorf("Error reading config file: %v", err)
139 // Read config from file
140 func readConfigFromFile(filename string) (config apiConfig, blobSigningKey string, err error) {
141 if !strings.Contains(filename, "/") {
142 filename = os.Getenv("HOME") + "/.config/arvados/" + filename + ".conf"
145 content, err := ioutil.ReadFile(filename)
148 return config, "", err
151 lines := strings.Split(string(content), "\n")
152 for _, line := range lines {
157 kv := strings.SplitN(line, "=", 2)
158 key := strings.TrimSpace(kv[0])
159 value := strings.TrimSpace(kv[1])
162 case "ARVADOS_API_TOKEN":
163 config.APIToken = value
164 case "ARVADOS_API_HOST":
165 config.APIHost = value
166 case "ARVADOS_API_HOST_INSECURE":
167 config.APIHostInsecure = arvadosclient.StringBool(value)
168 case "ARVADOS_EXTERNAL_CLIENT":
169 config.ExternalClient = arvadosclient.StringBool(value)
170 case "ARVADOS_BLOB_SIGNING_KEY":
171 blobSigningKey = value
177 // setup keepclient using the config provided
178 func setupKeepClient(config apiConfig, keepServicesJSON string, isDst bool, replications int, srcBlobSignatureTTL time.Duration) (kc *keepclient.KeepClient, blobSignatureTTL time.Duration, err error) {
179 arv := arvadosclient.ArvadosClient{
180 ApiToken: config.APIToken,
181 ApiServer: config.APIHost,
182 ApiInsecure: config.APIHostInsecure,
183 Client: &http.Client{Transport: &http.Transport{
184 TLSClientConfig: &tls.Config{InsecureSkipVerify: config.APIHostInsecure}}},
185 External: config.ExternalClient,
188 // If keepServicesJSON is provided, use it instead of service discovery
189 if keepServicesJSON == "" {
190 kc, err = keepclient.MakeKeepClient(&arv)
195 kc = keepclient.New(&arv)
196 err = kc.LoadKeepServicesFromJSON(keepServicesJSON)
203 // Get default replications value from destination, if it is not already provided
204 if replications == 0 {
205 value, err := arv.Discovery("defaultCollectionReplication")
207 replications = int(value.(float64))
213 kc.Want_replicas = replications
216 // If srcBlobSignatureTTL is not provided, get it from API server discovery doc
217 blobSignatureTTL = srcBlobSignatureTTL
218 if !isDst && srcBlobSignatureTTL == 0 {
219 value, err := arv.Discovery("blobSignatureTtl")
221 blobSignatureTTL = time.Duration(int(value.(float64))) * time.Second
227 return kc, blobSignatureTTL, nil
230 // Get unique block locators from src and dst
231 // Copy any blocks missing in dst
232 func performKeepRsync(kcSrc, kcDst *keepclient.KeepClient, srcBlobSignatureTTL time.Duration, blobSigningKey, prefix string) error {
233 // Get unique locators from src
234 srcIndex, err := getUniqueLocators(kcSrc, prefix)
239 // Get unique locators from dst
240 dstIndex, err := getUniqueLocators(kcDst, prefix)
245 // Get list of locators found in src, but missing in dst
246 toBeCopied := getMissingLocators(srcIndex, dstIndex)
248 // Copy each missing block to dst
249 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.",
250 len(srcIndex), len(dstIndex), len(toBeCopied))
252 err = copyBlocksToDst(toBeCopied, kcSrc, kcDst, srcBlobSignatureTTL, blobSigningKey)
257 // Get list of unique locators from the specified cluster
258 func getUniqueLocators(kc *keepclient.KeepClient, prefix string) (map[string]bool, error) {
259 uniqueLocators := map[string]bool{}
261 // Get index and dedup
262 for uuid := range kc.LocalRoots() {
263 reader, err := kc.GetIndex(uuid, prefix)
265 return uniqueLocators, err
267 scanner := bufio.NewScanner(reader)
269 uniqueLocators[strings.Split(scanner.Text(), " ")[0]] = true
273 return uniqueLocators, nil
276 // Get list of locators that are in src but not in dst
277 func getMissingLocators(srcLocators, dstLocators map[string]bool) []string {
278 var missingLocators []string
279 for locator := range srcLocators {
280 if _, ok := dstLocators[locator]; !ok {
281 missingLocators = append(missingLocators, locator)
284 return missingLocators
287 // Copy blocks from src to dst; only those that are missing in dst are copied
288 func copyBlocksToDst(toBeCopied []string, kcSrc, kcDst *keepclient.KeepClient, srcBlobSignatureTTL time.Duration, blobSigningKey string) error {
289 total := len(toBeCopied)
291 startedAt := time.Now()
292 for done, locator := range toBeCopied {
294 log.Printf("Copying data block %d of %d (%.2f%% done): %v", done+1, total,
295 float64(done)/float64(total)*100, locator)
297 timePerBlock := time.Since(startedAt) / time.Duration(done)
298 log.Printf("Copying data block %d of %d (%.2f%% done, %v est. time remaining): %v", done+1, total,
299 float64(done)/float64(total)*100, timePerBlock*time.Duration(total-done), locator)
302 getLocator := locator
303 expiresAt := time.Now().AddDate(0, 0, 1)
304 if blobSigningKey != "" {
305 getLocator = keepclient.SignLocator(getLocator, kcSrc.Arvados.ApiToken, expiresAt, srcBlobSignatureTTL, []byte(blobSigningKey))
308 reader, len, _, err := kcSrc.Get(getLocator)
310 return fmt.Errorf("Error getting block: %v %v", locator, err)
313 _, _, err = kcDst.PutHR(getLocator[:32], reader, len)
315 return fmt.Errorf("Error copying data block: %v %v", locator, err)
319 log.Printf("Successfully copied to destination %d blocks.", total)