Merge pull request #2349 from kmlebedev/fix_repl_volumes_per_step

Topology update for every Nth id volume

2 files changed, 98 insertions, 33 deletions

diff --git a/weed/shell/command_ec_decode.go b/weed/shell/command_ec_decode.go
index 18cea0504..3483156cb 100644
--- a/weed/shell/command_ec_decode.go
+++ b/weed/shell/command_ec_decode.go
@@ -208,6 +208,18 @@ func collectEcShards(commandEnv *CommandEnv, nodeToEcIndexBits map[pb.ServerAddr
 
 }
 
+func LookupVolumeIds(commandEnv *CommandEnv, volumeIds []string) (err error, volumeIdLocations []*master_pb.LookupVolumeResponse_VolumeIdLocation) {
+	var resp *master_pb.LookupVolumeResponse
+	err = commandEnv.MasterClient.WithClient(func(client master_pb.SeaweedClient) error {
+		resp, err = client.LookupVolume(context.Background(), &master_pb.LookupVolumeRequest{VolumeOrFileIds: volumeIds})
+		return err
+	})
+	if err != nil {
+		return err, nil
+	}
+	return nil, resp.VolumeIdLocations
+}
+
 func collectTopologyInfo(commandEnv *CommandEnv) (topoInfo *master_pb.TopologyInfo, volumeSizeLimitMb uint64, err error) {
 
 	var resp *master_pb.VolumeListResponse
diff --git a/weed/shell/command_volume_fix_replication.go b/weed/shell/command_volume_fix_replication.go
index 76a582b31..f03cd550e 100644
--- a/weed/shell/command_volume_fix_replication.go
+++ b/weed/shell/command_volume_fix_replication.go
@@ -10,6 +10,8 @@ import (
 	"io"
 	"path/filepath"
 	"sort"
+	"strconv"
+	"time"
 
 	"github.com/chrislusf/seaweedfs/weed/operation"
 	"github.com/chrislusf/seaweedfs/weed/pb/master_pb"
@@ -56,6 +58,8 @@ func (c *commandVolumeFixReplication) Do(args []string, commandEnv *CommandEnv,
 	c.collectionPattern = volFixReplicationCommand.String("collectionPattern", "", "match with wildcard characters '*' and '?'")
 	skipChange := volFixReplicationCommand.Bool("n", false, "skip the changes")
 	retryCount := volFixReplicationCommand.Int("retry", 0, "how many times to retry")
+	volumesPerStep := volFixReplicationCommand.Int("volumesPerStep", 0, "how many volumes to fix in one cycle")
+
 	if err = volFixReplicationCommand.Parse(args); err != nil {
 		return nil
 	}
@@ -66,44 +70,87 @@ func (c *commandVolumeFixReplication) Do(args []string, commandEnv *CommandEnv,
 
 	takeAction := !*skipChange
 
-	// collect topology information
-	topologyInfo, _, err := collectTopologyInfo(commandEnv)
-	if err != nil {
-		return err
-	}
+	underReplicatedVolumeIdsCount := 1
+	for underReplicatedVolumeIdsCount > 0 {
+		fixedVolumeReplicas := map[string]int{}
 
-	// find all volumes that needs replication
-	// collect all data nodes
-	volumeReplicas, allLocations := collectVolumeReplicaLocations(topologyInfo)
+		// collect topology information
+		topologyInfo, _, err := collectTopologyInfo(commandEnv)
+		if err != nil {
+			return err
+		}
 
-	if len(allLocations) == 0 {
-		return fmt.Errorf("no data nodes at all")
-	}
+		// find all volumes that needs replication
+		// collect all data nodes
+		volumeReplicas, allLocations := collectVolumeReplicaLocations(topologyInfo)
 
-	// find all under replicated volumes
-	var underReplicatedVolumeIds, overReplicatedVolumeIds []uint32
-	for vid, replicas := range volumeReplicas {
-		replica := replicas[0]
-		replicaPlacement, _ := super_block.NewReplicaPlacementFromByte(byte(replica.info.ReplicaPlacement))
-		if replicaPlacement.GetCopyCount() > len(replicas) {
-			underReplicatedVolumeIds = append(underReplicatedVolumeIds, vid)
-		} else if replicaPlacement.GetCopyCount() < len(replicas) {
-			overReplicatedVolumeIds = append(overReplicatedVolumeIds, vid)
-			fmt.Fprintf(writer, "volume %d replication %s, but over replicated %+d\n", replica.info.Id, replicaPlacement, len(replicas))
+		if len(allLocations) == 0 {
+			return fmt.Errorf("no data nodes at all")
 		}
-	}
 
-	if len(overReplicatedVolumeIds) > 0 {
-		return c.fixOverReplicatedVolumes(commandEnv, writer, takeAction, overReplicatedVolumeIds, volumeReplicas, allLocations)
-	}
+		// find all under replicated volumes
+		var underReplicatedVolumeIds, overReplicatedVolumeIds []uint32
+		for vid, replicas := range volumeReplicas {
+			replica := replicas[0]
+			replicaPlacement, _ := super_block.NewReplicaPlacementFromByte(byte(replica.info.ReplicaPlacement))
+			if replicaPlacement.GetCopyCount() > len(replicas) {
+				underReplicatedVolumeIds = append(underReplicatedVolumeIds, vid)
+			} else if replicaPlacement.GetCopyCount() < len(replicas) {
+				overReplicatedVolumeIds = append(overReplicatedVolumeIds, vid)
+				fmt.Fprintf(writer, "volume %d replication %s, but over replicated %+d\n", replica.info.Id, replicaPlacement, len(replicas))
+			}
+		}
 
-	if len(underReplicatedVolumeIds) == 0 {
-		return nil
-	}
+		if len(overReplicatedVolumeIds) > 0 {
+			if err := c.fixOverReplicatedVolumes(commandEnv, writer, takeAction, overReplicatedVolumeIds, volumeReplicas, allLocations); err != nil {
+				return err
+			}
+		}
 
-	// find the most under populated data nodes
-	return c.fixUnderReplicatedVolumes(commandEnv, writer, takeAction, underReplicatedVolumeIds, volumeReplicas, allLocations, *retryCount)
+		underReplicatedVolumeIdsCount = len(underReplicatedVolumeIds)
+		if underReplicatedVolumeIdsCount > 0 {
+			// find the most under populated data nodes
+			err, fixedVolumeReplicas = c.fixUnderReplicatedVolumes(commandEnv, writer, takeAction, underReplicatedVolumeIds, volumeReplicas, allLocations, *retryCount, *volumesPerStep)
+			if err != nil {
+				return err
+			}
+		}
 
+		if *skipChange {
+			break
+		}
+
+		// check that the topology has been updated
+		if len(fixedVolumeReplicas) > 0 {
+			fixedVolumes := make([]string, 0, len(fixedVolumeReplicas))
+			for k, _ := range fixedVolumeReplicas {
+				fixedVolumes = append(fixedVolumes, k)
+			}
+			err, volumeIdLocations := LookupVolumeIds(commandEnv, fixedVolumes)
+			if err != nil {
+				return err
+			}
+			for _, volumeIdLocation := range volumeIdLocations {
+				volumeId := volumeIdLocation.VolumeOrFileId
+				volumeIdLocationCount := len(volumeIdLocation.Locations)
+				i := 0
+				for fixedVolumeReplicas[volumeId] >= volumeIdLocationCount {
+					fmt.Fprintf(writer, "the number of locations for volume %s has not increased yet, let's wait\n", volumeId)
+					time.Sleep(time.Duration(i+1) * time.Second * 7)
+					err, volumeLocIds := LookupVolumeIds(commandEnv, []string{volumeId})
+					if err != nil {
+						return err
+					}
+					volumeIdLocationCount = len(volumeLocIds[0].Locations)
+					if *retryCount > i {
+						return fmt.Errorf("replicas volume %s mismatch in topology", volumeId)
+					}
+					i += 1
+				}
+			}
+		}
+	}
+	return nil
 }
 
 func collectVolumeReplicaLocations(topologyInfo *master_pb.TopologyInfo) (map[uint32][]*VolumeReplica, []location) {
@@ -156,16 +203,22 @@ func (c *commandVolumeFixReplication) fixOverReplicatedVolumes(commandEnv *Comma
 	return nil
 }
 
-func (c *commandVolumeFixReplication) fixUnderReplicatedVolumes(commandEnv *CommandEnv, writer io.Writer, takeAction bool, underReplicatedVolumeIds []uint32, volumeReplicas map[uint32][]*VolumeReplica, allLocations []location, retryCount int) (err error) {
-
+func (c *commandVolumeFixReplication) fixUnderReplicatedVolumes(commandEnv *CommandEnv, writer io.Writer, takeAction bool, underReplicatedVolumeIds []uint32, volumeReplicas map[uint32][]*VolumeReplica, allLocations []location, retryCount int, volumesPerStep int) (err error, fixedVolumes map[string]int) {
+	fixedVolumes = map[string]int{}
+	if len(underReplicatedVolumeIds) > volumesPerStep && volumesPerStep > 0 {
+		underReplicatedVolumeIds = underReplicatedVolumeIds[0:volumesPerStep]
+	}
 	for _, vid := range underReplicatedVolumeIds {
 		for i := 0; i < retryCount+1; i++ {
 			if err = c.fixOneUnderReplicatedVolume(commandEnv, writer, takeAction, volumeReplicas, vid, allLocations); err == nil {
+				if takeAction {
+					fixedVolumes[strconv.FormatUint(uint64(vid), 10)] = len(volumeReplicas[vid])
+				}
 				break
 			}
 		}
 	}
-	return
+	return nil, fixedVolumes
 }
 
 func (c *commandVolumeFixReplication) fixOneUnderReplicatedVolume(commandEnv *CommandEnv, writer io.Writer, takeAction bool, volumeReplicas map[uint32][]*VolumeReplica, vid uint32, allLocations []location) error {