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 := arvadosclient.MakeArvadosClient()
  46                 if err != nil {
  47                         loggerutil.FatalWithMessage(arvLogger, fmt.Sprintf("Error making arvados client: %v", err))
  48                 }
  49                 err = singlerun(arv)
  50                 if err != nil {
  51                         loggerutil.FatalWithMessage(arvLogger, fmt.Sprintf("singlerun: %v", err))
  52                 }
  53         } else {
  54                 waitTime := time.Minute * time.Duration(minutesBetweenRuns)
  55                 for {
  56                         log.Println("Beginning Run")
  57                         arv, err := arvadosclient.MakeArvadosClient()
  58                         if err != nil {
  59                                 loggerutil.FatalWithMessage(arvLogger, fmt.Sprintf("Error making arvados client: %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 var arvLogger *logger.Logger
  72
  73 func singlerun(arv arvadosclient.ArvadosClient) error {
  74         var err error
  75         if isAdmin, err := util.UserIsAdmin(arv); err != nil {
  76                 return errors.New("Error verifying admin token: " + err.Error())
  77         } else if !isAdmin {
  78                 return errors.New("Current user is not an admin. Datamanager requires a privileged token.")
  79         }
  80
  81         if logEventTypePrefix != "" {
  82                 arvLogger = logger.NewLogger(logger.LoggerParams{
  83                         Client:          arv,
  84                         EventTypePrefix: logEventTypePrefix,
  85                         WriteInterval:   time.Second * time.Duration(logFrequencySeconds)})
  86         }
  87
  88         loggerutil.LogRunInfo(arvLogger)
  89         if arvLogger != nil {
  90                 arvLogger.AddWriteHook(loggerutil.LogMemoryAlloc)
  91         }
  92
  93         var (
  94                 dataFetcher     summary.DataFetcher
  95                 readCollections collection.ReadCollections
  96                 keepServerInfo  keep.ReadServers
  97         )
  98
  99         if summary.ShouldReadData() {
 100                 dataFetcher = summary.ReadData
 101         } else {
 102                 dataFetcher = BuildDataFetcher(arv)
 103         }
 104
 105         dataFetcher(arvLogger, &readCollections, &keepServerInfo)
 106
 107         if readCollections.Err != nil {
 108                 return readCollections.Err
 109         }
 110
 111         err = summary.MaybeWriteData(arvLogger, readCollections, keepServerInfo)
 112         if err != nil {
 113                 return err
 114         }
 115
 116         buckets := summary.BucketReplication(readCollections, keepServerInfo)
 117         bucketCounts := buckets.Counts()
 118
 119         replicationSummary := buckets.SummarizeBuckets(readCollections)
 120         replicationCounts := replicationSummary.ComputeCounts()
 121
 122         log.Printf("Blocks In Collections: %d, "+
 123                 "\nBlocks In Keep: %d.",
 124                 len(readCollections.BlockToDesiredReplication),
 125                 len(keepServerInfo.BlockToServers))
 126         log.Println(replicationCounts.PrettyPrint())
 127
 128         log.Printf("Blocks Histogram:")
 129         for _, rlbss := range bucketCounts {
 130                 log.Printf("%+v: %10d",
 131                         rlbss.Levels,
 132                         rlbss.Count)
 133         }
 134
 135         kc, err := keepclient.MakeKeepClient(&arv)
 136         if err != nil {
 137                 return fmt.Errorf("Error setting up keep client %v", err.Error())
 138         }
 139
 140         // Log that we're finished. We force the recording, since go will
 141         // not wait for the write timer before exiting.
 142         if arvLogger != nil {
 143                 defer arvLogger.FinalUpdate(func(p map[string]interface{}, e map[string]interface{}) {
 144                         summaryInfo := logger.GetOrCreateMap(p, "summary_info")
 145                         summaryInfo["block_replication_counts"] = bucketCounts
 146                         summaryInfo["replication_summary"] = replicationCounts
 147                         p["summary_info"] = summaryInfo
 148
 149                         p["run_info"].(map[string]interface{})["finished_at"] = time.Now()
 150                 })
 151         }
 152
 153         pullServers := summary.ComputePullServers(kc,
 154                 &keepServerInfo,
 155                 readCollections.BlockToDesiredReplication,
 156                 replicationSummary.UnderReplicatedBlocks)
 157
 158         pullLists := summary.BuildPullLists(pullServers)
 159
 160         trashLists, trashErr := summary.BuildTrashLists(kc,
 161                 &keepServerInfo,
 162                 replicationSummary.KeepBlocksNotInCollections)
 163
 164         err = summary.WritePullLists(arvLogger, pullLists)
 165         if err != nil {
 166                 return err
 167         }
 168
 169         if trashErr != nil {
 170                 return err
 171         }
 172         keep.SendTrashLists(kc, trashLists)
 173
 174         return nil
 175 }
 176
 177 // BuildDataFetcher returns a data fetcher that fetches data from remote servers.
 178 func BuildDataFetcher(arv arvadosclient.ArvadosClient) summary.DataFetcher {
 179         return func(arvLogger *logger.Logger,
 180                 readCollections *collection.ReadCollections,
 181                 keepServerInfo *keep.ReadServers) {
 182                 collectionChannel := make(chan collection.ReadCollections)
 183
 184                 go func() {
 185                         collectionChannel <- collection.GetCollectionsAndSummarize(
 186                                 collection.GetCollectionsParams{
 187                                         Client:    arv,
 188                                         Logger:    arvLogger,
 189                                         BatchSize: 50})
 190                 }()
 191
 192                 var err error
 193                 *keepServerInfo, err = keep.GetKeepServersAndSummarize(
 194                         keep.GetKeepServersParams{
 195                                 Client: arv,
 196                                 Logger: arvLogger,
 197                                 Limit:  1000})
 198
 199                 if err != nil {
 200                         return
 201                 }
 202
 203                 *readCollections = <-collectionChannel
 204         }
 205 }