closes #8508

[arvados.git] / services / datamanager / datamanager.go

diff --git a/services/datamanager/datamanager.go b/services/datamanager/datamanager.go
index a9306ce83a6011002cef96b86eb6caf700feda23..8e128358422a560a42cbdaa03e20feb8067fa6ba 100644 (file)
--- a/services/datamanager/datamanager.go
+++ b/services/datamanager/datamanager.go
@@ -22,6 +22,8 @@ var (
        logEventTypePrefix  string
        logFrequencySeconds int
        minutesBetweenRuns  int
+       collectionBatchSize int
+       dryRun              bool
 )
 
 func init() {
@@ -36,21 +38,38 @@ func init() {
        flag.IntVar(&minutesBetweenRuns,
                "minutes-between-runs",
                0,
-               "How many minutes we wait betwen data manager runs. 0 means run once and exit.")
+               "How many minutes we wait between data manager runs. 0 means run once and exit.")
+       flag.IntVar(&collectionBatchSize,
+               "collection-batch-size",
+               1000,
+               "How many collections to request in each batch.")
+       flag.BoolVar(&dryRun,
+               "dry-run",
+               false,
+               "Perform a dry run. Log how many blocks would be deleted/moved, but do not issue any changes to keepstore.")
 }
 
 func main() {
        flag.Parse()
+
        if minutesBetweenRuns == 0 {
-               err := singlerun(makeArvadosClient())
+               arv, err := arvadosclient.MakeArvadosClient()
+               if err != nil {
+                       loggerutil.FatalWithMessage(arvLogger, fmt.Sprintf("Error making arvados client: %v", err))
+               }
+               err = singlerun(arv)
                if err != nil {
-                       log.Fatalf("singlerun: %v", err)
+                       loggerutil.FatalWithMessage(arvLogger, fmt.Sprintf("singlerun: %v", err))
                }
        } else {
                waitTime := time.Minute * time.Duration(minutesBetweenRuns)
                for {
                        log.Println("Beginning Run")
-                       err := singlerun(makeArvadosClient())
+                       arv, err := arvadosclient.MakeArvadosClient()
+                       if err != nil {
+                               loggerutil.FatalWithMessage(arvLogger, fmt.Sprintf("Error making arvados client: %v", err))
+                       }
+                       err = singlerun(arv)
                        if err != nil {
                                log.Printf("singlerun: %v", err)
                        }
@@ -60,13 +79,7 @@ func main() {
        }
 }
 
-func makeArvadosClient() arvadosclient.ArvadosClient {
-       arv, err := arvadosclient.MakeArvadosClient()
-       if err != nil {
-               log.Fatalf("Error setting up arvados client: %s", err)
-       }
-       return arv
-}
+var arvLogger *logger.Logger
 
 func singlerun(arv arvadosclient.ArvadosClient) error {
        var err error
@@ -76,9 +89,8 @@ func singlerun(arv arvadosclient.ArvadosClient) error {
                return errors.New("Current user is not an admin. Datamanager requires a privileged token.")
        }
 
-       var arvLogger *logger.Logger
        if logEventTypePrefix != "" {
-               arvLogger = logger.NewLogger(logger.LoggerParams{
+               arvLogger, err = logger.NewLogger(logger.LoggerParams{
                        Client:          arv,
                        EventTypePrefix: logEventTypePrefix,
                        WriteInterval:   time.Second * time.Duration(logFrequencySeconds)})
@@ -101,9 +113,15 @@ func singlerun(arv arvadosclient.ArvadosClient) error {
                dataFetcher = BuildDataFetcher(arv)
        }
 
-       dataFetcher(arvLogger, &readCollections, &keepServerInfo)
+       err = dataFetcher(arvLogger, &readCollections, &keepServerInfo)
+       if err != nil {
+               return err
+       }
 
-       summary.MaybeWriteData(arvLogger, readCollections, keepServerInfo)
+       err = summary.MaybeWriteData(arvLogger, readCollections, keepServerInfo)
+       if err != nil {
+               return err
+       }
 
        buckets := summary.BucketReplication(readCollections, keepServerInfo)
        bucketCounts := buckets.Counts()
@@ -126,8 +144,7 @@ func singlerun(arv arvadosclient.ArvadosClient) error {
 
        kc, err := keepclient.MakeKeepClient(&arv)
        if err != nil {
-               loggerutil.FatalWithMessage(arvLogger,
-                       fmt.Sprintf("Error setting up keep client %s", err.Error()))
+               return fmt.Errorf("Error setting up keep client %v", err.Error())
        }
 
        // Log that we're finished. We force the recording, since go will
@@ -154,37 +171,50 @@ func singlerun(arv arvadosclient.ArvadosClient) error {
                &keepServerInfo,
                replicationSummary.KeepBlocksNotInCollections)
 
-       summary.WritePullLists(arvLogger, pullLists)
+       err = summary.WritePullLists(arvLogger, pullLists, dryRun)
+       if err != nil {
+               return err
+       }
 
        if trashErr != nil {
                return err
        }
-       keep.SendTrashLists(kc, trashLists)
+       keep.SendTrashLists(arvLogger, kc, trashLists, dryRun)
 
        return nil
 }
 
 // BuildDataFetcher returns a data fetcher that fetches data from remote servers.
 func BuildDataFetcher(arv arvadosclient.ArvadosClient) summary.DataFetcher {
-       return func(arvLogger *logger.Logger,
+       return func(
+               arvLogger *logger.Logger,
                readCollections *collection.ReadCollections,
-               keepServerInfo *keep.ReadServers) {
-               collectionChannel := make(chan collection.ReadCollections)
-
+               keepServerInfo *keep.ReadServers,
+       ) error {
+               collDone := make(chan struct{})
+               var collErr error
                go func() {
-                       collectionChannel <- collection.GetCollectionsAndSummarize(
+                       *readCollections, collErr = collection.GetCollectionsAndSummarize(
                                collection.GetCollectionsParams{
                                        Client:    arv,
                                        Logger:    arvLogger,
-                                       BatchSize: 50})
+                                       BatchSize: collectionBatchSize})
+                       collDone <- struct{}{}
                }()
 
-               *keepServerInfo = keep.GetKeepServersAndSummarize(
+               var keepErr error
+               *keepServerInfo, keepErr = keep.GetKeepServersAndSummarize(
                        keep.GetKeepServersParams{
                                Client: arv,
                                Logger: arvLogger,
                                Limit:  1000})
 
-               *readCollections = <-collectionChannel
+               <-collDone
+
+               // Return a nil error only if both parts succeeded.
+               if collErr != nil {
+                       return collErr
+               }
+               return keepErr
        }
 }