services/datamanager/datamanager.go

   1 /* Keep Datamanager. Responsible for checking on and reporting on Keep Storage */
   2
   3 package main
   4
   5 import (
   6         "errors"
   7         "flag"
   8         "fmt"
   9         "git.curoverse.com/arvados.git/sdk/go/arvadosclient"
  10         "git.curoverse.com/arvados.git/sdk/go/keepclient"
  11         "git.curoverse.com/arvados.git/sdk/go/logger"
  12         "git.curoverse.com/arvados.git/sdk/go/util"
  13         "git.curoverse.com/arvados.git/services/datamanager/collection"
  14         "git.curoverse.com/arvados.git/services/datamanager/keep"
  15         "git.curoverse.com/arvados.git/services/datamanager/loggerutil"
  16         "git.curoverse.com/arvados.git/services/datamanager/summary"
  17         "log"
  18         "time"
  19 )
  20
  21 var (
  22         logEventTypePrefix  string
  23         logFrequencySeconds int
  24         minutesBetweenRuns  int
  25         collectionBatchSize int
  26         dryRun              bool
  27 )
  28
  29 func init() {
  30         flag.StringVar(&logEventTypePrefix,
  31                 "log-event-type-prefix",
  32                 "experimental-data-manager",
  33                 "Prefix to use in the event_type of our arvados log entries. Set to empty to turn off logging")
  34         flag.IntVar(&logFrequencySeconds,
  35                 "log-frequency-seconds",
  36                 20,
  37                 "How frequently we'll write log entries in seconds.")
  38         flag.IntVar(&minutesBetweenRuns,
  39                 "minutes-between-runs",
  40                 0,
  41                 "How many minutes we wait between data manager runs. 0 means run once and exit.")
  42         flag.IntVar(&collectionBatchSize,
  43                 "collection-batch-size",
  44                 1000,
  45                 "How many collections to request in each batch.")
  46         flag.BoolVar(&dryRun,
  47                 "dry-run",
  48                 false,
  49                 "Perform a dry run. Log how many blocks would be deleted/moved, but do not issue any changes to keepstore.")
  50 }
  51
  52 func main() {
  53         flag.Parse()
  54
  55         if minutesBetweenRuns == 0 {
  56                 arv, err := arvadosclient.MakeArvadosClient()
  57                 if err != nil {
  58                         loggerutil.FatalWithMessage(arvLogger, fmt.Sprintf("Error making arvados client: %v", err))
  59                 }
  60                 err = singlerun(arv)
  61                 if err != nil {
  62                         loggerutil.FatalWithMessage(arvLogger, fmt.Sprintf("singlerun: %v", err))
  63                 }
  64         } else {
  65                 waitTime := time.Minute * time.Duration(minutesBetweenRuns)
  66                 for {
  67                         log.Println("Beginning Run")
  68                         arv, err := arvadosclient.MakeArvadosClient()
  69                         if err != nil {
  70                                 loggerutil.FatalWithMessage(arvLogger, fmt.Sprintf("Error making arvados client: %v", err))
  71                         }
  72                         err = singlerun(arv)
  73                         if err != nil {
  74                                 log.Printf("singlerun: %v", err)
  75                         }
  76                         log.Printf("Sleeping for %d minutes", minutesBetweenRuns)
  77                         time.Sleep(waitTime)
  78                 }
  79         }
  80 }
  81
  82 var arvLogger *logger.Logger
  83
  84 func singlerun(arv arvadosclient.ArvadosClient) error {
  85         var err error
  86         if isAdmin, err := util.UserIsAdmin(arv); err != nil {
  87                 return errors.New("Error verifying admin token: " + err.Error())
  88         } else if !isAdmin {
  89                 return errors.New("Current user is not an admin. Datamanager requires a privileged token.")
  90         }
  91
  92         if logEventTypePrefix != "" {
  93                 arvLogger, err = logger.NewLogger(logger.LoggerParams{
  94                         Client:          arv,
  95                         EventTypePrefix: logEventTypePrefix,
  96                         WriteInterval:   time.Second * time.Duration(logFrequencySeconds)})
  97         }
  98
  99         loggerutil.LogRunInfo(arvLogger)
 100         if arvLogger != nil {
 101                 arvLogger.AddWriteHook(loggerutil.LogMemoryAlloc)
 102         }
 103
 104         var (
 105                 dataFetcher     summary.DataFetcher
 106                 readCollections collection.ReadCollections
 107                 keepServerInfo  keep.ReadServers
 108         )
 109
 110         if summary.ShouldReadData() {
 111                 dataFetcher = summary.ReadData
 112         } else {
 113                 dataFetcher = BuildDataFetcher(arv)
 114         }
 115
 116         err = dataFetcher(arvLogger, &readCollections, &keepServerInfo)
 117         if err != nil {
 118                 return err
 119         }
 120
 121         err = summary.MaybeWriteData(arvLogger, readCollections, keepServerInfo)
 122         if err != nil {
 123                 return err
 124         }
 125
 126         buckets := summary.BucketReplication(readCollections, keepServerInfo)
 127         bucketCounts := buckets.Counts()
 128
 129         replicationSummary := buckets.SummarizeBuckets(readCollections)
 130         replicationCounts := replicationSummary.ComputeCounts()
 131
 132         log.Printf("Blocks In Collections: %d, "+
 133                 "\nBlocks In Keep: %d.",
 134                 len(readCollections.BlockToDesiredReplication),
 135                 len(keepServerInfo.BlockToServers))
 136         log.Println(replicationCounts.PrettyPrint())
 137
 138         log.Printf("Blocks Histogram:")
 139         for _, rlbss := range bucketCounts {
 140                 log.Printf("%+v: %10d",
 141                         rlbss.Levels,
 142                         rlbss.Count)
 143         }
 144
 145         kc, err := keepclient.MakeKeepClient(&arv)
 146         if err != nil {
 147                 return fmt.Errorf("Error setting up keep client %v", err.Error())
 148         }
 149
 150         // Log that we're finished. We force the recording, since go will
 151         // not wait for the write timer before exiting.
 152         if arvLogger != nil {
 153                 defer arvLogger.FinalUpdate(func(p map[string]interface{}, e map[string]interface{}) {
 154                         summaryInfo := logger.GetOrCreateMap(p, "summary_info")
 155                         summaryInfo["block_replication_counts"] = bucketCounts
 156                         summaryInfo["replication_summary"] = replicationCounts
 157                         p["summary_info"] = summaryInfo
 158
 159                         p["run_info"].(map[string]interface{})["finished_at"] = time.Now()
 160                 })
 161         }
 162
 163         pullServers := summary.ComputePullServers(kc,
 164                 &keepServerInfo,
 165                 readCollections.BlockToDesiredReplication,
 166                 replicationSummary.UnderReplicatedBlocks)
 167
 168         pullLists := summary.BuildPullLists(pullServers)
 169
 170         trashLists, trashErr := summary.BuildTrashLists(kc,
 171                 &keepServerInfo,
 172                 replicationSummary.KeepBlocksNotInCollections)
 173
 174         err = summary.WritePullLists(arvLogger, pullLists, dryRun)
 175         if err != nil {
 176                 return err
 177         }
 178
 179         if trashErr != nil {
 180                 return err
 181         }
 182         keep.SendTrashLists(arvLogger, kc, trashLists, dryRun)
 183
 184         return nil
 185 }
 186
 187 // BuildDataFetcher returns a data fetcher that fetches data from remote servers.
 188 func BuildDataFetcher(arv arvadosclient.ArvadosClient) summary.DataFetcher {
 189         return func(
 190                 arvLogger *logger.Logger,
 191                 readCollections *collection.ReadCollections,
 192                 keepServerInfo *keep.ReadServers,
 193         ) error {
 194                 collDone := make(chan struct{})
 195                 var collErr error
 196                 go func() {
 197                         *readCollections, collErr = collection.GetCollectionsAndSummarize(
 198                                 collection.GetCollectionsParams{
 199                                         Client:    arv,
 200                                         Logger:    arvLogger,
 201                                         BatchSize: collectionBatchSize})
 202                         collDone <- struct{}{}
 203                 }()
 204
 205                 var keepErr error
 206                 *keepServerInfo, keepErr = keep.GetKeepServersAndSummarize(
 207                         keep.GetKeepServersParams{
 208                                 Client: arv,
 209                                 Logger: arvLogger,
 210                                 Limit:  1000})
 211
 212                 <-collDone
 213
 214                 // Return a nil error only if both parts succeeded.
 215                 if collErr != nil {
 216                         return collErr
 217                 }
 218                 return keepErr
 219         }
 220 }