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                 singlerun()
  45         } else {
  46                 waitTime := time.Minute * time.Duration(minutesBetweenRuns)
  47                 for {
  48                         log.Println("Beginning Run")
  49                         singlerun()
  50                         log.Printf("Sleeping for %d minutes", minutesBetweenRuns)
  51                         time.Sleep(waitTime)
  52                 }
  53         }
  54 }
  55
  56 func singlerun() {
  57         arv, err := arvadosclient.MakeArvadosClient()
  58         if err != nil {
  59                 log.Fatalf("Error setting up arvados client %s", err.Error())
  60         }
  61
  62         if is_admin, err := util.UserIsAdmin(arv); err != nil {
  63                 log.Fatalf("Error querying current arvados user %s", err.Error())
  64         } else if !is_admin {
  65                 log.Fatalf("Current user is not an admin. Datamanager can only be run by admins.")
  66         }
  67
  68         var arvLogger *logger.Logger
  69         if logEventTypePrefix != "" {
  70                 arvLogger = logger.NewLogger(logger.LoggerParams{
  71                         Client:          arv,
  72                         EventTypePrefix: logEventTypePrefix,
  73                         WriteInterval:   time.Second * time.Duration(logFrequencySeconds)})
  74         }
  75
  76         loggerutil.LogRunInfo(arvLogger)
  77         if arvLogger != nil {
  78                 arvLogger.AddWriteHook(loggerutil.LogMemoryAlloc)
  79         }
  80
  81         var (
  82                 dataFetcher     summary.DataFetcher
  83                 readCollections collection.ReadCollections
  84                 keepServerInfo  keep.ReadServers
  85         )
  86
  87         if summary.ShouldReadData() {
  88                 dataFetcher = summary.ReadData
  89         } else {
  90                 dataFetcher = BuildDataFetcher(arv)
  91         }
  92
  93         dataFetcher(arvLogger, &readCollections, &keepServerInfo)
  94
  95         summary.MaybeWriteData(arvLogger, readCollections, keepServerInfo)
  96
  97         buckets := summary.BucketReplication(readCollections, keepServerInfo)
  98         bucketCounts := buckets.Counts()
  99
 100         replicationSummary := buckets.SummarizeBuckets(readCollections)
 101         replicationCounts := replicationSummary.ComputeCounts()
 102
 103         log.Printf("Blocks In Collections: %d, "+
 104                 "\nBlocks In Keep: %d.",
 105                 len(readCollections.BlockToDesiredReplication),
 106                 len(keepServerInfo.BlockToServers))
 107         log.Println(replicationCounts.PrettyPrint())
 108
 109         log.Printf("Blocks Histogram:")
 110         for _, rlbss := range bucketCounts {
 111                 log.Printf("%+v: %10d",
 112                         rlbss.Levels,
 113                         rlbss.Count)
 114         }
 115
 116         kc, err := keepclient.MakeKeepClient(&arv)
 117         if err != nil {
 118                 loggerutil.FatalWithMessage(arvLogger,
 119                         fmt.Sprintf("Error setting up keep client %s", err.Error()))
 120         }
 121
 122         pullServers := summary.ComputePullServers(kc,
 123                 &keepServerInfo,
 124                 readCollections.BlockToDesiredReplication,
 125                 replicationSummary.UnderReplicatedBlocks)
 126
 127         pullLists := summary.BuildPullLists(pullServers)
 128
 129         summary.WritePullLists(arvLogger, pullLists)
 130
 131         // Log that we're finished. We force the recording, since go will
 132         // not wait for the write timer before exiting.
 133         if arvLogger != nil {
 134                 arvLogger.FinalUpdate(func(p map[string]interface{}, e map[string]interface{}) {
 135                         summaryInfo := logger.GetOrCreateMap(p, "summary_info")
 136                         summaryInfo["block_replication_counts"] = bucketCounts
 137                         summaryInfo["replication_summary"] = replicationCounts
 138                         p["summary_info"] = summaryInfo
 139
 140                         p["run_info"].(map[string]interface{})["finished_at"] = time.Now()
 141                 })
 142         }
 143 }
 144
 145 // Returns a data fetcher that fetches data from remote servers.
 146 func BuildDataFetcher(arv arvadosclient.ArvadosClient) summary.DataFetcher {
 147         return func(arvLogger *logger.Logger,
 148                 readCollections *collection.ReadCollections,
 149                 keepServerInfo *keep.ReadServers) {
 150                 collectionChannel := make(chan collection.ReadCollections)
 151
 152                 go func() {
 153                         collectionChannel <- collection.GetCollectionsAndSummarize(
 154                                 collection.GetCollectionsParams{
 155                                         Client:    arv,
 156                                         Logger:    arvLogger,
 157                                         BatchSize: 50})
 158                 }()
 159
 160                 *keepServerInfo = keep.GetKeepServersAndSummarize(
 161                         keep.GetKeepServersParams{
 162                                 Client: arv,
 163                                 Logger: arvLogger,
 164                                 Limit:  1000})
 165
 166                 *readCollections = <-collectionChannel
 167         }
 168 }