server

package
v2.1.0-beta+incompatible Latest Latest
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 Go to latest Published: Jun 29, 2018 License: Apache-2.0 Imports: 48 Imported by: 0

Documentation

Index

Constants

This section is empty.

Variables

View Source 
var (
	// ErrNotBootstrapped is error info for cluster not bootstrapped
	ErrNotBootstrapped = errors.New("TiKV cluster not bootstrapped, please start TiKV first")
	// ErrOperatorNotFound is error info for operator not found
	ErrOperatorNotFound = errors.New("operator not found")
	// ErrAddOperator is error info for already have an operator when adding operator
	ErrAddOperator = errors.New("failed to add operator, maybe already have one")
	// ErrRegionNotAdjacent is error info for region not adjacent
	ErrRegionNotAdjacent = errors.New("two regions are not adjacent")
	// ErrRegionNotFound is error info for region not found
	ErrRegionNotFound = func(regionID uint64) error {
		return errors.Errorf("region %v not found", regionID)
	}
	// ErrRegionAbnormalPeer is error info for region has abonormal peer
	ErrRegionAbnormalPeer = func(regionID uint64) error {
		return errors.Errorf("region %v has abnormal peer", regionID)
	}
	// ErrRegionIsStale is error info for region is stale
	ErrRegionIsStale = func(region *metapb.Region, origin *metapb.Region) error {
		return errors.Errorf("region is stale: region %v origin %v", region, origin)
	}
)
View Source 
var (
	PDReleaseVersion = "None"
	PDBuildTS        = "None"
	PDGitHash        = "None"
	PDGitBranch      = "None"
)

Version information.

View Source 
var DialClient = &http.Client{
	Transport: &http.Transport{
		DisableKeepAlives: true,
	},
}

DialClient used to dail http request.

View Source 
var EnableZap = false

EnableZap enable the zap logger in embed etcd.

Functions

func GetMembers 

func GetMembers(etcdClient *clientv3.Client) ([]*pdpb.Member, error)

GetMembers return a slice of Members.

func InitHTTPClient 

func InitHTTPClient(svr *Server) error

InitHTTPClient initials a http client.

func IsDefaultScheduler 

func IsDefaultScheduler(typ string) bool

IsDefaultScheduler checks whether the scheduler is enable by default.

func LogPDInfo 

func LogPDInfo()

LogPDInfo prints the PD version information.

func NewTestServer 

func NewTestServer() (*Config, *Server, CleanupFunc, error)

NewTestServer creates a pd server for testing.

func ParseUrls 

func ParseUrls(s string) ([]url.URL, error)

ParseUrls parse a string into multiple urls. Export for api.

func PrepareJoinCluster 

func PrepareJoinCluster(cfg *Config) error

PrepareJoinCluster sends MemberAdd command to PD cluster, and returns the initial configuration of the PD cluster.

TL;TR: The join functionality is safe. With data, join does nothing, w/o data 

and it is not a member of cluster, join does MemberAdd, it returns an
error if PD tries to join itself, missing data or join a duplicated PD.

Etcd automatically re-joins the cluster if there is a data directory. So first it checks if there is a data directory or not. If there is, it returns an empty string (etcd will get the correct configurations from the data directory.)

If there is no data directory, there are following cases:

  • A new PD joins an existing cluster. What join does: MemberAdd, MemberList, then generate initial-cluster.

  • A failed PD re-joins the previous cluster. What join does: return an error. (etcd reports: raft log corrupted, truncated, or lost?)

  • A deleted PD joins to previous cluster. What join does: MemberAdd, MemberList, then generate initial-cluster. (it is not in the member list and there is no data, so we can treat it as a new PD.)

If there is a data directory, there are following special cases:

  • A failed PD tries to join the previous cluster but it has been deleted during its downtime. What join does: return "" (etcd will connect to other peers and find that the PD itself has been removed.)

  • A deleted PD joins the previous cluster. What join does: return "" (as etcd will read data directory and find that the PD itself has been removed, so an empty string is fine.)

func PrintPDInfo 

func PrintPDInfo()

PrintPDInfo prints the PD version information without log info.

func StartMonitor 

func StartMonitor(now func() time.Time, systimeErrHandler func())

StartMonitor calls systimeErrHandler if system time jump backward.

Types

type CleanupFunc 

type CleanupFunc func()

CleanupFunc closes test pd server(s) and deletes any files left behind.

type ClusterStatus 

type ClusterStatus struct {
	RaftBootstrapTime time.Time `json:"raft_bootstrap_time,omitempty"`
}

ClusterStatus saves some state information

type Config 

type Config struct {
	*flag.FlagSet `json:"-"`

	Version bool `json:"-"`

	ClientUrls          string `toml:"client-urls" json:"client-urls"`
	PeerUrls            string `toml:"peer-urls" json:"peer-urls"`
	AdvertiseClientUrls string `toml:"advertise-client-urls" json:"advertise-client-urls"`
	AdvertisePeerUrls   string `toml:"advertise-peer-urls" json:"advertise-peer-urls"`

	Name    string `toml:"name" json:"name"`
	DataDir string `toml:"data-dir" json:"data-dir"`

	InitialCluster      string `toml:"initial-cluster" json:"initial-cluster"`
	InitialClusterState string `toml:"initial-cluster-state" json:"initial-cluster-state"`

	// Join to an existing pd cluster, a string of endpoints.
	Join string `toml:"join" json:"join"`

	// LeaderLease time, if leader doesn't update its TTL
	// in etcd after lease time, etcd will expire the leader key
	// and other servers can campaign the leader again.
	// Etcd onlys support seoncds TTL, so here is second too.
	LeaderLease int64 `toml:"lease" json:"lease"`

	// Log related config.
	Log logutil.LogConfig `toml:"log" json:"log"`

	// Backward compatibility.
	LogFileDeprecated  string `toml:"log-file" json:"log-file"`
	LogLevelDeprecated string `toml:"log-level" json:"log-level"`

	// TsoSaveInterval is the interval to save timestamp.
	TsoSaveInterval typeutil.Duration `toml:"tso-save-interval" json:"tso-save-interval"`

	Metric metricutil.MetricConfig `toml:"metric" json:"metric"`

	Schedule ScheduleConfig `toml:"schedule" json:"schedule"`

	Replication ReplicationConfig `toml:"replication" json:"replication"`

	Namespace map[string]NamespaceConfig `json:"namespace"`

	// QuotaBackendBytes Raise alarms when backend size exceeds the given quota. 0 means use the default quota.
	// the default size is 2GB, the maximum is 8GB.
	QuotaBackendBytes typeutil.ByteSize `toml:"quota-backend-bytes" json:"quota-backend-bytes"`
	// AutoCompactionMode is either 'periodic' or 'revision'. The default value is 'periodic'.
	AutoCompactionMode string `toml:"auto-compaction-mode" json:"auto-compaction-mode"`
	// AutoCompactionRetention is either duration string with time unit
	// (e.g. '5m' for 5-minute), or revision unit (e.g. '5000').
	// If no time unit is provided and compaction mode is 'periodic',
	// the unit defaults to hour. For example, '5' translates into 5-hour.
	// The default retention is 1 hour.
	// Before etcd v3.3.x, the type of retention is int. We add 'v2' suffix to make it backward compatible.
	AutoCompactionRetention string `toml:"auto-compaction-retention" json:"auto-compaction-retention-v2"`

	// TickInterval is the interval for etcd Raft tick.
	TickInterval typeutil.Duration `toml:"tick-interval"`
	// ElectionInterval is the interval for etcd Raft election.
	ElectionInterval typeutil.Duration `toml:"election-interval"`
	// Prevote is true to enable Raft Pre-Vote.
	// If enabled, Raft runs an additional election phase
	// to check whether it would get enough votes to win
	// an election, thus minimizing disruptions.
	PreVote bool `toml:"enable-prevote"`

	Security SecurityConfig `toml:"security" json:"security"`

	LabelProperty LabelPropertyConfig `toml:"label-property" json:"label-property"`

	// For all warnings during parsing.
	WarningMsgs []string

	// NamespaceClassifier is for classifying stores/regions into different
	// namespaces.
	NamespaceClassifier string `toml:"namespace-classifier" json:"namespace-classifier"`
	// contains filtered or unexported fields
}

Config is the pd server configuration.

func NewConfig 

func NewConfig() *Config

NewConfig creates a new config.

func NewTestMultiConfig 

func NewTestMultiConfig(count int) []*Config

NewTestMultiConfig is only for test to create multiple pd configurations. Because pd-client also needs this, so export here.

func NewTestSingleConfig 

func NewTestSingleConfig() *Config

NewTestSingleConfig is only for test to create one pd. Because pd-client also needs this, so export here.

func (*Config) Parse 

func (c *Config) Parse(arguments []string) error

Parse parses flag definitions from the argument list.

func (*Config) String 

func (c *Config) String() string

type Handler 

type Handler struct {
	// contains filtered or unexported fields
}

Handler is a helper to export methods to handle API/RPC requests.

func (*Handler) AddAddPeerOperator 

func (h *Handler) AddAddPeerOperator(regionID uint64, toStoreID uint64) error

AddAddPeerOperator adds an operator to add peer.

func (*Handler) AddAdjacentRegionScheduler 

func (h *Handler) AddAdjacentRegionScheduler(args ...string) error

AddAdjacentRegionScheduler adds a balance-adjacent-region-scheduler.

func (*Handler) AddBalanceHotRegionScheduler added in v1.0.3 

func (h *Handler) AddBalanceHotRegionScheduler() error

AddBalanceHotRegionScheduler adds a balance-hot-region-scheduler.

func (*Handler) AddBalanceLeaderScheduler 

func (h *Handler) AddBalanceLeaderScheduler() error

AddBalanceLeaderScheduler adds a balance-leader-scheduler.

func (*Handler) AddBalanceRegionScheduler added in v1.0.3 

func (h *Handler) AddBalanceRegionScheduler() error

AddBalanceRegionScheduler adds a balance-region-scheduler.

func (*Handler) AddEvictLeaderScheduler 

func (h *Handler) AddEvictLeaderScheduler(storeID uint64) error

AddEvictLeaderScheduler adds an evict-leader-scheduler.

func (*Handler) AddGrantLeaderScheduler 

func (h *Handler) AddGrantLeaderScheduler(storeID uint64) error

AddGrantLeaderScheduler adds a grant-leader-scheduler.

func (*Handler) AddLabelScheduler 

func (h *Handler) AddLabelScheduler() error

AddLabelScheduler adds a label-scheduler.

func (*Handler) AddMergeRegionOperator 

func (h *Handler) AddMergeRegionOperator(regionID uint64, targetID uint64) error

AddMergeRegionOperator adds an operator to merge region.

func (*Handler) AddRandomMergeScheduler 

func (h *Handler) AddRandomMergeScheduler() error

AddRandomMergeScheduler adds a random-merge-scheduler.

func (*Handler) AddRemovePeerOperator 

func (h *Handler) AddRemovePeerOperator(regionID uint64, fromStoreID uint64) error

AddRemovePeerOperator adds an operator to remove peer.

func (*Handler) AddScatterRangeScheduler 

func (h *Handler) AddScatterRangeScheduler(args ...string) error

AddScatterRangeScheduler adds a balance-range-leader-scheduler

func (*Handler) AddScatterRegionOperator 

func (h *Handler) AddScatterRegionOperator(regionID uint64) error

AddScatterRegionOperator adds an operator to scatter a region.

func (*Handler) AddScheduler 

func (h *Handler) AddScheduler(name string, args ...string) error

AddScheduler adds a scheduler.

func (*Handler) AddShuffleLeaderScheduler 

func (h *Handler) AddShuffleLeaderScheduler() error

AddShuffleLeaderScheduler adds a shuffle-leader-scheduler.

func (*Handler) AddShuffleRegionScheduler 

func (h *Handler) AddShuffleRegionScheduler() error

AddShuffleRegionScheduler adds a shuffle-region-scheduler.

func (*Handler) AddSplitRegionOperator 

func (h *Handler) AddSplitRegionOperator(regionID uint64) error

AddSplitRegionOperator adds an operator to split a region.

func (*Handler) AddTransferLeaderOperator 

func (h *Handler) AddTransferLeaderOperator(regionID uint64, storeID uint64) error

AddTransferLeaderOperator adds an operator to transfer leader to the store.

func (*Handler) AddTransferPeerOperator 

func (h *Handler) AddTransferPeerOperator(regionID uint64, fromStoreID, toStoreID uint64) error

AddTransferPeerOperator adds an operator to transfer peer.

func (*Handler) AddTransferRegionOperator 

func (h *Handler) AddTransferRegionOperator(regionID uint64, storeIDs map[uint64]struct{}) error

AddTransferRegionOperator adds an operator to transfer region to the stores.

func (*Handler) GetAdminOperators 

func (h *Handler) GetAdminOperators() ([]*schedule.Operator, error)

GetAdminOperators returns the running admin operators.

func (*Handler) GetDownPeerRegions 

func (h *Handler) GetDownPeerRegions() ([]*core.RegionInfo, error)

GetDownPeerRegions gets the region with down peer.

func (*Handler) GetExtraPeerRegions 

func (h *Handler) GetExtraPeerRegions() ([]*core.RegionInfo, error)

GetExtraPeerRegions gets the region exceeds the specified number of peers.

func (*Handler) GetHistory 

func (h *Handler) GetHistory(start time.Time) ([]schedule.OperatorHistory, error)

GetHistory returns finished operators' history since start.

func (*Handler) GetHotBytesReadStores 

func (h *Handler) GetHotBytesReadStores() map[uint64]uint64

GetHotBytesReadStores gets all hot write stores stats.

func (*Handler) GetHotBytesWriteStores 

func (h *Handler) GetHotBytesWriteStores() map[uint64]uint64

GetHotBytesWriteStores gets all hot write stores stats.

func (*Handler) GetHotKeysReadStores 

func (h *Handler) GetHotKeysReadStores() map[uint64]uint64

GetHotKeysReadStores gets all hot write stores stats.

func (*Handler) GetHotKeysWriteStores 

func (h *Handler) GetHotKeysWriteStores() map[uint64]uint64

GetHotKeysWriteStores gets all hot write stores stats.

func (*Handler) GetHotReadRegions 

func (h *Handler) GetHotReadRegions() *core.StoreHotRegionInfos

GetHotReadRegions gets all hot read regions stats.

func (*Handler) GetHotWriteRegions 

func (h *Handler) GetHotWriteRegions() *core.StoreHotRegionInfos

GetHotWriteRegions gets all hot write regions stats.

func (*Handler) GetIncorrectNamespaceRegions 

func (h *Handler) GetIncorrectNamespaceRegions() ([]*core.RegionInfo, error)

GetIncorrectNamespaceRegions gets the region with incorrect namespace peer.

func (*Handler) GetLeaderOperators 

func (h *Handler) GetLeaderOperators() ([]*schedule.Operator, error)

GetLeaderOperators returns the running leader operators.

func (*Handler) GetMissPeerRegions 

func (h *Handler) GetMissPeerRegions() ([]*core.RegionInfo, error)

GetMissPeerRegions gets the region less than the specified number of peers.

func (*Handler) GetOperator 

func (h *Handler) GetOperator(regionID uint64) (*schedule.Operator, error)

GetOperator returns the region operator.

func (*Handler) GetOperators 

func (h *Handler) GetOperators() ([]*schedule.Operator, error)

GetOperators returns the running operators.

func (*Handler) GetOperatorsOfKind 

func (h *Handler) GetOperatorsOfKind(mask schedule.OperatorKind) ([]*schedule.Operator, error)

GetOperatorsOfKind returns the running operators of the kind.

func (*Handler) GetPendingPeerRegions 

func (h *Handler) GetPendingPeerRegions() ([]*core.RegionInfo, error)

GetPendingPeerRegions gets the region with pending peer.

func (*Handler) GetRegionOperators 

func (h *Handler) GetRegionOperators() ([]*schedule.Operator, error)

GetRegionOperators returns the running region operators.

func (*Handler) GetSchedulers 

func (h *Handler) GetSchedulers() ([]string, error)

GetSchedulers returns all names of schedulers.

func (*Handler) GetStores 

func (h *Handler) GetStores() ([]*core.StoreInfo, error)

GetStores returns all stores in the cluster.

func (*Handler) RemoveOperator 

func (h *Handler) RemoveOperator(regionID uint64) error

RemoveOperator removes the region operator.

func (*Handler) RemoveScheduler 

func (h *Handler) RemoveScheduler(name string) error

RemoveScheduler removes a scheduler by name.

type LabelPropertyConfig 

type LabelPropertyConfig map[string][]StoreLabel

LabelPropertyConfig is the config section to set properties to store labels.

type NamespaceConfig 

type NamespaceConfig struct {
	// LeaderScheduleLimit is the max coexist leader schedules.
	LeaderScheduleLimit uint64 `json:"leader-schedule-limit"`
	// RegionScheduleLimit is the max coexist region schedules.
	RegionScheduleLimit uint64 `json:"region-schedule-limit"`
	// ReplicaScheduleLimit is the max coexist replica schedules.
	ReplicaScheduleLimit uint64 `json:"replica-schedule-limit"`
	// MergeScheduleLimit is the max coexist merge schedules.
	MergeScheduleLimit uint64 `json:"merge-schedule-limit"`
	// MaxReplicas is the number of replicas for each region.
	MaxReplicas uint64 `json:"max-replicas"`
}

NamespaceConfig is to overwrite the global setting for specific namespace

type RaftCluster 

type RaftCluster struct {
	sync.RWMutex
	// contains filtered or unexported fields
}

RaftCluster is used for cluster config management. Raft cluster key format: cluster 1 -> /1/raft, value is metapb.Cluster cluster 2 -> /2/raft For cluster 1 store 1 -> /1/raft/s/1, value is metapb.Store region 1 -> /1/raft/r/1, value is metapb.Region

func (*RaftCluster) BuryStore 

func (c *RaftCluster) BuryStore(storeID uint64, force bool) error

BuryStore marks a store as tombstone in cluster. State transition: Case 1: Up -> Tombstone (if force is true); Case 2: Offline -> Tombstone.

func (*RaftCluster) DropCacheRegion 

func (c *RaftCluster) DropCacheRegion(id uint64)

DropCacheRegion removes a region from the cache.

func (*RaftCluster) GetAdjacentRegions 

func (c *RaftCluster) GetAdjacentRegions(region *core.RegionInfo) (*core.RegionInfo, *core.RegionInfo)

GetAdjacentRegions returns region's info that is adjacent with specific region id.

func (*RaftCluster) GetConfig 

func (c *RaftCluster) GetConfig() *metapb.Cluster

GetConfig gets config from cluster.

func (*RaftCluster) GetMetaRegions 

func (c *RaftCluster) GetMetaRegions() []*metapb.Region

GetMetaRegions gets regions from cluster.

func (*RaftCluster) GetNamespaceClassifier 

func (c *RaftCluster) GetNamespaceClassifier() namespace.Classifier

GetNamespaceClassifier returns current namespace classifier.

func (*RaftCluster) GetRegionByID 

func (c *RaftCluster) GetRegionByID(regionID uint64) (*metapb.Region, *metapb.Peer)

GetRegionByID gets region and leader peer by regionID from cluster.

func (*RaftCluster) GetRegionByKey 

func (c *RaftCluster) GetRegionByKey(regionKey []byte) (*metapb.Region, *metapb.Peer)

GetRegionByKey gets region and leader peer by region key from cluster.

func (*RaftCluster) GetRegionInfoByID 

func (c *RaftCluster) GetRegionInfoByID(regionID uint64) *core.RegionInfo

GetRegionInfoByID gets regionInfo by regionID from cluster.

func (*RaftCluster) GetRegionInfoByKey 

func (c *RaftCluster) GetRegionInfoByKey(regionKey []byte) *core.RegionInfo

GetRegionInfoByKey gets regionInfo by region key from cluster.

func (*RaftCluster) GetRegionStats 

func (c *RaftCluster) GetRegionStats(startKey, endKey []byte) *core.RegionStats

GetRegionStats returns region statistics from cluster.

func (*RaftCluster) GetRegions 

func (c *RaftCluster) GetRegions() []*core.RegionInfo

GetRegions returns all regions info in detail.

func (*RaftCluster) GetStore 

func (c *RaftCluster) GetStore(storeID uint64) (*core.StoreInfo, error)

GetStore gets store from cluster.

func (*RaftCluster) GetStores 

func (c *RaftCluster) GetStores() []*metapb.Store

GetStores gets stores from cluster.

func (*RaftCluster) HandleRegionHeartbeat 

func (c *RaftCluster) HandleRegionHeartbeat(region *core.RegionInfo) error

HandleRegionHeartbeat processes RegionInfo reports from client.

func (*RaftCluster) RemoveStore 

func (c *RaftCluster) RemoveStore(storeID uint64) error

RemoveStore marks a store as offline in cluster. State transition: Up -> Offline.

func (*RaftCluster) SetStoreState 

func (c *RaftCluster) SetStoreState(storeID uint64, state metapb.StoreState) error

SetStoreState sets up a store's state.

func (*RaftCluster) SetStoreWeight 

func (c *RaftCluster) SetStoreWeight(storeID uint64, leader, region float64) error

SetStoreWeight sets up a store's leader/region balance weight.

func (*RaftCluster) UpdateStoreLabels 

func (c *RaftCluster) UpdateStoreLabels(storeID uint64, labels []*metapb.StoreLabel) error

UpdateStoreLabels updates a store's location labels.

type Replication 

type Replication struct {
	// contains filtered or unexported fields
}

Replication provides some help to do replication.

func (*Replication) GetLocationLabels 

func (r *Replication) GetLocationLabels() []string

GetLocationLabels returns the location labels for each region

func (*Replication) GetMaxReplicas 

func (r *Replication) GetMaxReplicas() int

GetMaxReplicas returns the number of replicas for each region.

func (*Replication) SetMaxReplicas 

func (r *Replication) SetMaxReplicas(replicas int)

SetMaxReplicas set the replicas for each region.

type ReplicationConfig 

type ReplicationConfig struct {
	// MaxReplicas is the number of replicas for each region.
	MaxReplicas uint64 `toml:"max-replicas,omitempty" json:"max-replicas"`

	// The label keys specified the location of a store.
	// The placement priorities is implied by the order of label keys.
	// For example, ["zone", "rack"] means that we should place replicas to
	// different zones first, then to different racks if we don't have enough zones.
	LocationLabels typeutil.StringSlice `toml:"location-labels,omitempty" json:"location-labels"`
}

ReplicationConfig is the replication configuration.

type ScheduleConfig 

type ScheduleConfig struct {
	// If the snapshot count of one store is greater than this value,
	// it will never be used as a source or target store.
	MaxSnapshotCount    uint64 `toml:"max-snapshot-count,omitempty" json:"max-snapshot-count"`
	MaxPendingPeerCount uint64 `toml:"max-pending-peer-count,omitempty" json:"max-pending-peer-count"`
	// If both the size of region is smaller than MaxMergeRegionSize
	// and the number of rows in region is smaller than MaxMergeRegionRows,
	// it will try to merge with adjacent regions.
	MaxMergeRegionSize uint64 `toml:"max-merge-region-size,omitempty" json:"max-merge-region-size"`
	MaxMergeRegionRows uint64 `toml:"max-merge-region-rows,omitempty" json:"max-merge-region-rows"`
	// SplitMergeInterval is the minimum interval time to permit merge after split.
	SplitMergeInterval typeutil.Duration `toml:"split-merge-interval,omitempty" json:"split-merge-interval"`
	// PatrolRegionInterval is the interval for scanning region during patrol.
	PatrolRegionInterval typeutil.Duration `toml:"patrol-region-interval,omitempty" json:"patrol-region-interval"`
	// MaxStoreDownTime is the max duration after which
	// a store will be considered to be down if it hasn't reported heartbeats.
	MaxStoreDownTime typeutil.Duration `toml:"max-store-down-time,omitempty" json:"max-store-down-time"`
	// LeaderScheduleLimit is the max coexist leader schedules.
	LeaderScheduleLimit uint64 `toml:"leader-schedule-limit,omitempty" json:"leader-schedule-limit"`
	// RegionScheduleLimit is the max coexist region schedules.
	RegionScheduleLimit uint64 `toml:"region-schedule-limit,omitempty" json:"region-schedule-limit"`
	// ReplicaScheduleLimit is the max coexist replica schedules.
	ReplicaScheduleLimit uint64 `toml:"replica-schedule-limit,omitempty" json:"replica-schedule-limit"`
	// MergeScheduleLimit is the max coexist merge schedules.
	MergeScheduleLimit uint64 `toml:"merge-schedule-limit,omitempty" json:"merge-schedule-limit"`
	// TolerantSizeRatio is the ratio of buffer size for balance scheduler.
	TolerantSizeRatio float64 `toml:"tolerant-size-ratio,omitempty" json:"tolerant-size-ratio"`
	//
	//      high space stage         transition stage           low space stage
	//   |--------------------|-----------------------------|-------------------------|
	//   ^                    ^                             ^                         ^
	//   0       HighSpaceRatio * capacity       LowSpaceRatio * capacity          capacity
	//
	// LowSpaceRatio is the lowest usage ratio of store which regraded as low space.
	// When in low space, store region score increases to very large and varies inversely with available size.
	LowSpaceRatio float64 `toml:"low-space-ratio,omitempty" json:"low-space-ratio"`
	// HighSpaceRatio is the highest usage ratio of store which regraded as high space.
	// High space means there is a lot of spare capacity, and store region score varies directly with used size.
	HighSpaceRatio float64 `toml:"high-space-ratio,omitempty" json:"high-space-ratio"`
	// DisableLearner is the option to disable using AddLearnerNode instead of AddNode
	DisableLearner bool `toml:"disable-raft-learner" json:"disable-raft-learner,string"`
	// Schedulers support for loding customized schedulers
	Schedulers SchedulerConfigs `toml:"schedulers,omitempty" json:"schedulers-v2"` // json v2 is for the sake of compatible upgrade
}

ScheduleConfig is the schedule configuration.

type SchedulerConfig 

type SchedulerConfig struct {
	Type    string   `toml:"type" json:"type"`
	Args    []string `toml:"args,omitempty" json:"args"`
	Disable bool     `toml:"disable" json:"disable"`
}

SchedulerConfig is customized scheduler configuration

type SchedulerConfigs 

type SchedulerConfigs []SchedulerConfig

SchedulerConfigs is a slice of customized scheduler configuration.

type SecurityConfig 

type SecurityConfig struct {
	// CAPath is the path of file that contains list of trusted SSL CAs. if set, following four settings shouldn't be empty
	CAPath string `toml:"cacert-path" json:"cacert-path"`
	// CertPath is the path of file that contains X509 certificate in PEM format.
	CertPath string `toml:"cert-path" json:"cert-path"`
	// KeyPath is the path of file that contains X509 key in PEM format.
	KeyPath string `toml:"key-path" json:"key-path"`
}

SecurityConfig is the configuration for supporting tls.

func (SecurityConfig) ToTLSConfig 

func (s SecurityConfig) ToTLSConfig() (*tls.Config, error)

ToTLSConfig generatres tls config.

type Server 

type Server struct {
	// contains filtered or unexported fields
}

Server is the pd server.

func CreateServer 

func CreateServer(cfg *Config, apiRegister func(*Server) http.Handler) (*Server, error)

CreateServer creates the UNINITIALIZED pd server with given configuration.

func (*Server) AllocID 

func (s *Server) AllocID(ctx context.Context, request *pdpb.AllocIDRequest) (*pdpb.AllocIDResponse, error)

AllocID implements gRPC PDServer.

func (*Server) AskSplit 

func (s *Server) AskSplit(ctx context.Context, request *pdpb.AskSplitRequest) (*pdpb.AskSplitResponse, error)

AskSplit implements gRPC PDServer.

func (*Server) Bootstrap 

func (s *Server) Bootstrap(ctx context.Context, request *pdpb.BootstrapRequest) (*pdpb.BootstrapResponse, error)

Bootstrap implements gRPC PDServer.

func (*Server) CheckHealth 

func (s *Server) CheckHealth(members []*pdpb.Member) map[uint64]*pdpb.Member

CheckHealth checks if members are healthy

func (*Server) Close 

func (s *Server) Close()

Close closes the server.

func (*Server) ClusterID 

func (s *Server) ClusterID() uint64

ClusterID returns the cluster ID of this server.

func (*Server) DeleteLabelProperty 

func (s *Server) DeleteLabelProperty(typ, labelKey, labelValue string) error

DeleteLabelProperty deletes a label property config.

func (*Server) DeleteMemberLeaderPriority 

func (s *Server) DeleteMemberLeaderPriority(id uint64) error

DeleteMemberLeaderPriority removes a member's priority config.

func (*Server) DeleteNamespaceConfig 

func (s *Server) DeleteNamespaceConfig(name string)

DeleteNamespaceConfig deletes the namespace config.

func (*Server) GetAddr 

func (s *Server) GetAddr() string

GetAddr returns the server urls for clients.

func (*Server) GetAllStores 

func (s *Server) GetAllStores(ctx context.Context, request *pdpb.GetAllStoresRequest) (*pdpb.GetAllStoresResponse, error)

GetAllStores implements gRPC PDServer.

func (*Server) GetClient 

func (s *Server) GetClient() *clientv3.Client

GetClient returns builtin etcd client.

func (*Server) GetCluster 

func (s *Server) GetCluster() *metapb.Cluster

GetCluster gets cluster.

func (*Server) GetClusterConfig 

func (s *Server) GetClusterConfig(ctx context.Context, request *pdpb.GetClusterConfigRequest) (*pdpb.GetClusterConfigResponse, error)

GetClusterConfig implements gRPC PDServer.

func (*Server) GetClusterStatus 

func (s *Server) GetClusterStatus() (*ClusterStatus, error)

GetClusterStatus gets cluster status.

func (*Server) GetConfig 

func (s *Server) GetConfig() *Config

GetConfig gets the config information.

func (*Server) GetEndpoints 

func (s *Server) GetEndpoints() []string

GetEndpoints returns the etcd endpoints for outer use.

func (*Server) GetHandler 

func (s *Server) GetHandler() *Handler

GetHandler returns the handler for API.

func (*Server) GetLabelProperty 

func (s *Server) GetLabelProperty() LabelPropertyConfig

GetLabelProperty returns the whole label property config.

func (*Server) GetLeader 

func (s *Server) GetLeader() (*pdpb.Member, error)

GetLeader gets pd cluster leader.

func (*Server) GetMemberLeaderPriority 

func (s *Server) GetMemberLeaderPriority(id uint64) (int, error)

GetMemberLeaderPriority loads a member's priority to be elected as the etcd leader.

func (*Server) GetMembers 

func (s *Server) GetMembers(context.Context, *pdpb.GetMembersRequest) (*pdpb.GetMembersResponse, error)

GetMembers implements gRPC PDServer.

func (*Server) GetNamespaceConfig 

func (s *Server) GetNamespaceConfig(name string) *NamespaceConfig

GetNamespaceConfig get the namespace config.

func (*Server) GetNamespaceConfigWithAdjust 

func (s *Server) GetNamespaceConfigWithAdjust(name string) *NamespaceConfig

GetNamespaceConfigWithAdjust get the namespace config that replace zero value with global config value.

func (*Server) GetRaftCluster 

func (s *Server) GetRaftCluster() *RaftCluster

GetRaftCluster gets raft cluster. If cluster has not been bootstrapped, return nil.

func (*Server) GetRegion 

func (s *Server) GetRegion(ctx context.Context, request *pdpb.GetRegionRequest) (*pdpb.GetRegionResponse, error)

GetRegion implements gRPC PDServer.

func (*Server) GetRegionByID 

func (s *Server) GetRegionByID(ctx context.Context, request *pdpb.GetRegionByIDRequest) (*pdpb.GetRegionResponse, error)

GetRegionByID implements gRPC PDServer.

func (*Server) GetReplicationConfig 

func (s *Server) GetReplicationConfig() *ReplicationConfig

GetReplicationConfig get the replication config.

func (*Server) GetScheduleConfig 

func (s *Server) GetScheduleConfig() *ScheduleConfig

GetScheduleConfig gets the balance config information.

func (*Server) GetSecurityConfig 

func (s *Server) GetSecurityConfig() *SecurityConfig

GetSecurityConfig get the security config.

func (*Server) GetStore 

func (s *Server) GetStore(ctx context.Context, request *pdpb.GetStoreRequest) (*pdpb.GetStoreResponse, error)

GetStore implements gRPC PDServer.

func (*Server) ID 

func (s *Server) ID() uint64

ID returns the unique etcd ID for this server in etcd cluster.

func (*Server) IsBootstrapped 

func (s *Server) IsBootstrapped(ctx context.Context, request *pdpb.IsBootstrappedRequest) (*pdpb.IsBootstrappedResponse, error)

IsBootstrapped implements gRPC PDServer.

func (*Server) IsLeader 

func (s *Server) IsLeader() bool

IsLeader returns whether server is leader or not.

func (*Server) IsNamespaceExist 

func (s *Server) IsNamespaceExist(name string) bool

IsNamespaceExist returns whether the namespace exists.

func (*Server) Name 

func (s *Server) Name() string

Name returns the unique etcd Name for this server in etcd cluster.

func (*Server) PutClusterConfig 

func (s *Server) PutClusterConfig(ctx context.Context, request *pdpb.PutClusterConfigRequest) (*pdpb.PutClusterConfigResponse, error)

PutClusterConfig implements gRPC PDServer.

func (*Server) PutStore 

func (s *Server) PutStore(ctx context.Context, request *pdpb.PutStoreRequest) (*pdpb.PutStoreResponse, error)

PutStore implements gRPC PDServer.

func (*Server) RegionHeartbeat 

func (s *Server) RegionHeartbeat(stream pdpb.PD_RegionHeartbeatServer) error

RegionHeartbeat implements gRPC PDServer.

func (*Server) ReportSplit 

func (s *Server) ReportSplit(ctx context.Context, request *pdpb.ReportSplitRequest) (*pdpb.ReportSplitResponse, error)

ReportSplit implements gRPC PDServer.

func (*Server) ResignLeader 

func (s *Server) ResignLeader(nextLeader string) error

ResignLeader resigns current PD's leadership. If nextLeader is empty, all other pd-servers can campaign.

func (*Server) Run 

func (s *Server) Run(ctx context.Context) error

Run runs the pd server.

func (*Server) ScatterRegion 

func (s *Server) ScatterRegion(ctx context.Context, request *pdpb.ScatterRegionRequest) (*pdpb.ScatterRegionResponse, error)

ScatterRegion implements gRPC PDServer.

func (*Server) SetLabelProperty 

func (s *Server) SetLabelProperty(typ, labelKey, labelValue string) error

SetLabelProperty inserts a label property config.

func (*Server) SetLogLevel added in v1.0.7 

func (s *Server) SetLogLevel(level string)

SetLogLevel sets log level.

func (*Server) SetMemberLeaderPriority 

func (s *Server) SetMemberLeaderPriority(id uint64, priority int) error

SetMemberLeaderPriority saves a member's priority to be elected as the etcd leader.

func (*Server) SetNamespaceConfig 

func (s *Server) SetNamespaceConfig(name string, cfg NamespaceConfig)

SetNamespaceConfig sets the namespace config.

func (*Server) SetReplicationConfig 

func (s *Server) SetReplicationConfig(cfg ReplicationConfig) error

SetReplicationConfig sets the replication config.

func (*Server) SetScheduleConfig 

func (s *Server) SetScheduleConfig(cfg ScheduleConfig) error

SetScheduleConfig sets the balance config information.

func (*Server) StoreHeartbeat 

func (s *Server) StoreHeartbeat(ctx context.Context, request *pdpb.StoreHeartbeatRequest) (*pdpb.StoreHeartbeatResponse, error)

StoreHeartbeat implements gRPC PDServer.

func (*Server) Tso 

func (s *Server) Tso(stream pdpb.PD_TsoServer) error

Tso implements gRPC PDServer.

type StoreLabel 

type StoreLabel struct {
	Key   string `toml:"key" json:"key"`
	Value string `toml:"value" json:"value"`
}

StoreLabel is the config item of LabelPropertyConfig.

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