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