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