Admin: misc improvements on admin server and workers. EC now works. (#7055)

* initial design

* added simulation as tests

* reorganized the codebase to move the simulation framework and tests into their own dedicated package

* integration test. ec worker task

* remove "enhanced" reference

* start master, volume servers, filer

Current Status
✅ Master: Healthy and running (port 9333)
✅ Filer: Healthy and running (port 8888)
✅ Volume Servers: All 6 servers running (ports 8080-8085)
🔄 Admin/Workers: Will start when dependencies are ready

* generate write load

* tasks are assigned

* admin start wtih grpc port. worker has its own working directory

* Update .gitignore

* working worker and admin. Task detection is not working yet.

* compiles, detection uses volumeSizeLimitMB from master

* compiles

* worker retries connecting to admin

* build and restart

* rendering pending tasks

* skip task ID column

* sticky worker id

* test canScheduleTaskNow

* worker reconnect to admin

* clean up logs

* worker register itself first

* worker can run ec work and report status

but:
1. one volume should not be repeatedly worked on.
2. ec shards needs to be distributed and source data should be deleted.

* move ec task logic

* listing ec shards

* local copy, ec. Need to distribute.

* ec is mostly working now

* distribution of ec shards needs improvement
* need configuration to enable ec

* show ec volumes

* interval field UI component

* rename

* integration test with vauuming

* garbage percentage threshold

* fix warning

* display ec shard sizes

* fix ec volumes list

* Update ui.go

* show default values

* ensure correct default value

* MaintenanceConfig use ConfigField

* use schema defined defaults

* config

* reduce duplication

* refactor to use BaseUIProvider

* each task register its schema

* checkECEncodingCandidate use ecDetector

* use vacuumDetector

* use volumeSizeLimitMB

* remove

remove

* remove unused

* refactor

* use new framework

* remove v2 reference

* refactor

* left menu can scroll now

* The maintenance manager was not being initialized when no data directory was configured for persistent storage.

* saving config

* Update task_config_schema_templ.go

* enable/disable tasks

* protobuf encoded task configurations

* fix system settings

* use ui component

* remove logs

* interface{} Reduction

* reduce interface{}

* reduce interface{}

* avoid from/to map

* reduce interface{}

* refactor

* keep it DRY

* added logging

* debug messages

* debug level

* debug

* show the log caller line

* use configured task policy

* log level

* handle admin heartbeat response

* Update worker.go

* fix EC rack and dc count

* Report task status to admin server

* fix task logging, simplify interface checking, use erasure_coding constants

* factor in empty volume server during task planning

* volume.list adds disk id

* track disk id also

* fix locking scheduled and manual scanning

* add active topology

* simplify task detector

* ec task completed, but shards are not showing up

* implement ec in ec_typed.go

* adjust log level

* dedup

* implementing ec copying shards and only ecx files

* use disk id when distributing ec shards

🎯 Planning: ActiveTopology creates DestinationPlan with specific TargetDisk
📦 Task Creation: maintenance_integration.go creates ECDestination with DiskId
🚀 Task Execution: EC task passes DiskId in VolumeEcShardsCopyRequest
💾 Volume Server: Receives disk_id and stores shards on specific disk (vs.store.Locations[req.DiskId])
📂 File System: EC shards and metadata land in the exact disk directory planned

* Delete original volume from all locations

* clean up existing shard locations

* local encoding and distributing

* Update docker/admin_integration/EC-TESTING-README.md

Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>

* check volume id range

* simplify

* fix tests

* fix types

* clean up logs and tests

---------

Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>

weed/server/volume_grpc_erasure_coding.go

@@ -141,20 +141,31 @@ func (vs *VolumeServer) VolumeEcShardsCopy(ctx context.Context, req *volume_serv
 	glog.V(0).Infof("VolumeEcShardsCopy: %v", req)
 
 	var location *storage.DiskLocation
-	if req.CopyEcxFile {
-		location = vs.store.FindFreeLocation(func(location *storage.DiskLocation) bool {
-			return location.DiskType == types.HardDriveType
-		})
+
+	// Use disk_id if provided (disk-aware storage)
+	if req.DiskId > 0 || (req.DiskId == 0 && len(vs.store.Locations) > 0) {
+		// Validate disk ID is within bounds
+		if int(req.DiskId) >= len(vs.store.Locations) {
+			return nil, fmt.Errorf("invalid disk_id %d: only have %d disks", req.DiskId, len(vs.store.Locations))
+		}
+
+		// Use the specific disk location
+		location = vs.store.Locations[req.DiskId]
+		glog.V(1).Infof("Using disk %d for EC shard copy: %s", req.DiskId, location.Directory)
 	} else {
-		location = vs.store.FindFreeLocation(func(location *storage.DiskLocation) bool {
-			//(location.FindEcVolume) This method is error, will cause location is nil, redundant judgment
-			// _, found := location.FindEcVolume(needle.VolumeId(req.VolumeId))
-			// return found
-			return true
-		})
-	}
-	if location == nil {
-		return nil, fmt.Errorf("no space left")
+		// Fallback to old behavior for backward compatibility
+		if req.CopyEcxFile {
+			location = vs.store.FindFreeLocation(func(location *storage.DiskLocation) bool {
+				return location.DiskType == types.HardDriveType
+			})
+		} else {
+			location = vs.store.FindFreeLocation(func(location *storage.DiskLocation) bool {
+				return true
+			})
+		}
+		if location == nil {
+			return nil, fmt.Errorf("no space left")
+		}
 	}
 
 	dataBaseFileName := storage.VolumeFileName(location.Directory, req.Collection, int(req.VolumeId))
@@ -467,3 +478,30 @@ func (vs *VolumeServer) VolumeEcShardsToVolume(ctx context.Context, req *volume_
 
 	return &volume_server_pb.VolumeEcShardsToVolumeResponse{}, nil
 }
+
+func (vs *VolumeServer) VolumeEcShardsInfo(ctx context.Context, req *volume_server_pb.VolumeEcShardsInfoRequest) (*volume_server_pb.VolumeEcShardsInfoResponse, error) {
+	glog.V(0).Infof("VolumeEcShardsInfo: volume %d", req.VolumeId)
+
+	var ecShardInfos []*volume_server_pb.EcShardInfo
+
+	// Find the EC volume
+	for _, location := range vs.store.Locations {
+		if v, found := location.FindEcVolume(needle.VolumeId(req.VolumeId)); found {
+			// Get shard details from the EC volume
+			shardDetails := v.ShardDetails()
+			for _, shardDetail := range shardDetails {
+				ecShardInfo := &volume_server_pb.EcShardInfo{
+					ShardId:    uint32(shardDetail.ShardId),
+					Size:       shardDetail.Size,
+					Collection: v.Collection,
+				}
+				ecShardInfos = append(ecShardInfos, ecShardInfo)
+			}
+			break
+		}
+	}
+
+	return &volume_server_pb.VolumeEcShardsInfoResponse{
+		EcShardInfos: ecShardInfos,
+	}, nil
+}