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         "git.curoverse.com/arvados.git/sdk/go/arvadosclient"
   8         "git.curoverse.com/arvados.git/sdk/go/logger"
   9         "git.curoverse.com/arvados.git/sdk/go/util"
  10         "git.curoverse.com/arvados.git/services/datamanager/collection"
  11         "git.curoverse.com/arvados.git/services/datamanager/keep"
  12         "git.curoverse.com/arvados.git/services/datamanager/loggerutil"
  13         "git.curoverse.com/arvados.git/services/datamanager/summary"
  14         "log"
  15         "time"
  16 )
  17
  18 var (
  19         logEventTypePrefix  string
  20         logFrequencySeconds int
  21         minutesBetweenRuns  int
  22 )
  23
  24 func init() {
  25         flag.StringVar(&logEventTypePrefix,
  26                 "log-event-type-prefix",
  27                 "experimental-data-manager",
  28                 "Prefix to use in the event_type of our arvados log entries. Set to empty to turn off logging")
  29         flag.IntVar(&logFrequencySeconds,
  30                 "log-frequency-seconds",
  31                 20,
  32                 "How frequently we'll write log entries in seconds.")
  33         flag.IntVar(&minutesBetweenRuns,
  34                 "minutes-between-runs",
  35                 0,
  36                 "How many minutes we wait betwen data manager runs. 0 means run once and exit.")
  37 }
  38
  39 func main() {
  40         flag.Parse()
  41         if minutesBetweenRuns == 0 {
  42                 singlerun()
  43         } else {
  44                 waitTime := time.Minute * time.Duration(minutesBetweenRuns)
  45                 for {
  46                         log.Println("Beginning Run")
  47                         singlerun()
  48                         log.Printf("Sleeping for %d minutes", minutesBetweenRuns)
  49                         time.Sleep(waitTime)
  50                 }
  51         }
  52 }
  53
  54 func singlerun() {
  55         arv, err := arvadosclient.MakeArvadosClient()
  56         if err != nil {
  57                 log.Fatalf("Error setting up arvados client %s", err.Error())
  58         }
  59
  60         if is_admin, err := util.UserIsAdmin(arv); err != nil {
  61                 log.Fatalf("Error querying current arvados user %s", err.Error())
  62         } else if !is_admin {
  63                 log.Fatalf("Current user is not an admin. Datamanager can only be run by admins.")
  64         }
  65
  66         var arvLogger *logger.Logger
  67         if logEventTypePrefix != "" {
  68                 arvLogger = logger.NewLogger(logger.LoggerParams{
  69                         Client:          arv,
  70                         EventTypePrefix: logEventTypePrefix,
  71                         WriteInterval:   time.Second * time.Duration(logFrequencySeconds)})
  72         }
  73
  74         loggerutil.LogRunInfo(arvLogger)
  75         if arvLogger != nil {
  76                 arvLogger.AddWriteHook(loggerutil.LogMemoryAlloc)
  77         }
  78
  79         var (
  80                 readCollections collection.ReadCollections
  81                 keepServerInfo  keep.ReadServers
  82         )
  83
  84         if !summary.MaybeReadData(arvLogger, &readCollections, &keepServerInfo) {
  85                 collectionChannel := make(chan collection.ReadCollections)
  86
  87                 go func() {
  88                         collectionChannel <- collection.GetCollectionsAndSummarize(
  89                                 collection.GetCollectionsParams{
  90                                         Client:    arv,
  91                                         Logger:    arvLogger,
  92                                         BatchSize: 50})
  93                 }()
  94
  95                 keepServerInfo = keep.GetKeepServersAndSummarize(
  96                         keep.GetKeepServersParams{
  97                                 Client: arv,
  98                                 Logger: arvLogger,
  99                                 Limit:  1000})
 100
 101                 readCollections = <-collectionChannel
 102         }
 103
 104         summary.MaybeWriteData(arvLogger, readCollections, keepServerInfo)
 105
 106         buckets := summary.BucketReplication(readCollections, keepServerInfo)
 107         bucketCounts := buckets.Counts()
 108
 109         replicationSummary := buckets.SummarizeBuckets(readCollections)
 110         replicationCounts := replicationSummary.ComputeCounts()
 111
 112         log.Printf("Blocks In Collections: %d, "+
 113                 "\nBlocks In Keep: %d.",
 114                 len(readCollections.BlockToReplication),
 115                 len(keepServerInfo.BlockToServers))
 116         log.Println(replicationCounts.PrettyPrint())
 117
 118         log.Printf("Blocks Histogram:")
 119         for _, rlbss := range bucketCounts {
 120                 log.Printf("%+v: %10d",
 121                         rlbss.Levels,
 122                         rlbss.Count)
 123         }
 124
 125         // Log that we're finished. We force the recording, since go will
 126         // not wait for the write timer before exiting.
 127         if arvLogger != nil {
 128                 arvLogger.FinalUpdate(func(p map[string]interface{}, e map[string]interface{}) {
 129                         summaryInfo := logger.GetOrCreateMap(p, "summary_info")
 130                         summaryInfo["block_replication_counts"] = bucketCounts
 131                         summaryInfo["replication_summary"] = replicationCounts
 132                         p["summary_info"] = summaryInfo
 133
 134                         p["run_info"].(map[string]interface{})["finished_at"] = time.Now()
 135                 })
 136         }
 137 }