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                 arv, err := makeArvadosClient()
  46                 if err != nil {
  47                         log.Fatalf("makeArvadosClient: %v", err)
  48                 }
  49                 err = singlerun(arv)
  50                 if err != nil {
  51                         log.Fatalf("singlerun: %v", err)
  52                 }
  53         } else {
  54                 waitTime := time.Minute * time.Duration(minutesBetweenRuns)
  55                 for {
  56                         log.Println("Beginning Run")
  57                         arv, err := makeArvadosClient()
  58                         if err != nil {
  59                                 log.Fatalf("makeArvadosClient: %v", err)
  60                         }
  61                         err = singlerun(arv)
  62                         if err != nil {
  63                                 log.Printf("singlerun: %v", err)
  64                         }
  65                         log.Printf("Sleeping for %d minutes", minutesBetweenRuns)
  66                         time.Sleep(waitTime)
  67                 }
  68         }
  69 }
  70
  71 func makeArvadosClient() (arvadosclient.ArvadosClient, error) {
  72         return arvadosclient.MakeArvadosClient()
  73 }
  74
  75 func singlerun(arv arvadosclient.ArvadosClient) error {
  76         var err error
  77         if isAdmin, err := util.UserIsAdmin(arv); err != nil {
  78                 return errors.New("Error verifying admin token: " + err.Error())
  79         } else if !isAdmin {
  80                 return errors.New("Current user is not an admin. Datamanager requires a privileged token.")
  81         }
  82
  83         var arvLogger *logger.Logger
  84         if logEventTypePrefix != "" {
  85                 arvLogger = logger.NewLogger(logger.LoggerParams{
  86                         Client:          arv,
  87                         EventTypePrefix: logEventTypePrefix,
  88                         WriteInterval:   time.Second * time.Duration(logFrequencySeconds)})
  89         }
  90
  91         loggerutil.LogRunInfo(arvLogger)
  92         if arvLogger != nil {
  93                 arvLogger.AddWriteHook(loggerutil.LogMemoryAlloc)
  94         }
  95
  96         var (
  97                 dataFetcher     summary.DataFetcher
  98                 readCollections collection.ReadCollections
  99                 keepServerInfo  keep.ReadServers
 100         )
 101
 102         if summary.ShouldReadData() {
 103                 dataFetcher = summary.ReadData
 104         } else {
 105                 dataFetcher = BuildDataFetcher(arv)
 106         }
 107
 108         dataFetcher(arvLogger, &readCollections, &keepServerInfo)
 109
 110         if len(readCollections.UUIDToCollection) == 0 {
 111                 return nil // no collections read so no more work to do?
 112         }
 113
 114         _, err = summary.MaybeWriteData(arvLogger, readCollections, keepServerInfo)
 115         if err != nil {
 116                 return err
 117         }
 118
 119         buckets := summary.BucketReplication(readCollections, keepServerInfo)
 120         bucketCounts := buckets.Counts()
 121
 122         replicationSummary := buckets.SummarizeBuckets(readCollections)
 123         replicationCounts := replicationSummary.ComputeCounts()
 124
 125         log.Printf("Blocks In Collections: %d, "+
 126                 "\nBlocks In Keep: %d.",
 127                 len(readCollections.BlockToDesiredReplication),
 128                 len(keepServerInfo.BlockToServers))
 129         log.Println(replicationCounts.PrettyPrint())
 130
 131         log.Printf("Blocks Histogram:")
 132         for _, rlbss := range bucketCounts {
 133                 log.Printf("%+v: %10d",
 134                         rlbss.Levels,
 135                         rlbss.Count)
 136         }
 137
 138         kc, err := keepclient.MakeKeepClient(&arv)
 139         if err != nil {
 140                 return fmt.Errorf("Error setting up keep client %v", err.Error())
 141         }
 142
 143         // Log that we're finished. We force the recording, since go will
 144         // not wait for the write timer before exiting.
 145         if arvLogger != nil {
 146                 defer arvLogger.FinalUpdate(func(p map[string]interface{}, e map[string]interface{}) {
 147                         summaryInfo := logger.GetOrCreateMap(p, "summary_info")
 148                         summaryInfo["block_replication_counts"] = bucketCounts
 149                         summaryInfo["replication_summary"] = replicationCounts
 150                         p["summary_info"] = summaryInfo
 151
 152                         p["run_info"].(map[string]interface{})["finished_at"] = time.Now()
 153                 })
 154         }
 155
 156         pullServers := summary.ComputePullServers(kc,
 157                 &keepServerInfo,
 158                 readCollections.BlockToDesiredReplication,
 159                 replicationSummary.UnderReplicatedBlocks)
 160
 161         pullLists := summary.BuildPullLists(pullServers)
 162
 163         trashLists, trashErr := summary.BuildTrashLists(kc,
 164                 &keepServerInfo,
 165                 replicationSummary.KeepBlocksNotInCollections)
 166
 167         err = summary.WritePullLists(arvLogger, pullLists)
 168         if err != nil {
 169                 return err
 170         }
 171
 172         if trashErr != nil {
 173                 return err
 174         }
 175         keep.SendTrashLists(kc, trashLists)
 176
 177         return nil
 178 }
 179
 180 // BuildDataFetcher returns a data fetcher that fetches data from remote servers.
 181 func BuildDataFetcher(arv arvadosclient.ArvadosClient) summary.DataFetcher {
 182         return func(arvLogger *logger.Logger,
 183                 readCollections *collection.ReadCollections,
 184                 keepServerInfo *keep.ReadServers) {
 185                 collectionChannel := make(chan collection.ReadCollections)
 186
 187                 go func() {
 188                         collectionChannel <- collection.GetCollectionsAndSummarize(
 189                                 arvLogger,
 190                                 collection.GetCollectionsParams{
 191                                         Client:    arv,
 192                                         Logger:    arvLogger,
 193                                         BatchSize: 50})
 194                 }()
 195
 196                 var err error
 197                 *keepServerInfo, err = keep.GetKeepServersAndSummarize(
 198                         keep.GetKeepServersParams{
 199                                 Client: arv,
 200                                 Logger: arvLogger,
 201                                 Limit:  1000})
 202
 203                 if err != nil {
 204                         return
 205                 }
 206
 207                 *readCollections = <-collectionChannel
 208         }
 209 }