services/datamanager/datamanager.go

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