etcdserver

package
v3.5.0-alpha.4 Latest Latest
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 Go to latest Published: Nov 26, 2020 License: Apache-2.0 Imports: 72 Imported by: 4

Documentation

Overview

Package etcdserver defines how etcd servers interact and store their states.

Index

Constants

View Source 
const (
	// DefaultQuotaBytes is the number of bytes the backend Size may
	// consume before exceeding the space quota.
	DefaultQuotaBytes = int64(2 * 1024 * 1024 * 1024) // 2GB
	// MaxQuotaBytes is the maximum number of bytes suggested for a backend
	// quota. A larger quota may lead to degraded performance.
	MaxQuotaBytes = int64(8 * 1024 * 1024 * 1024) // 8GB
)
View Source 
const (
	DefaultSnapshotCount = 100000

	// DefaultSnapshotCatchUpEntries is the number of entries for a slow follower
	// to catch-up after compacting the raft storage entries.
	// We expect the follower has a millisecond level latency with the leader.
	// The max throughput is around 10K. Keep a 5K entries is enough for helping
	// follower to catch up.
	DefaultSnapshotCatchUpEntries uint64 = 5000

	StoreClusterPrefix = "/0"
	StoreKeysPrefix    = "/1"

	// HealthInterval is the minimum time the cluster should be healthy
	// before accepting add member requests.
	HealthInterval = 5 * time.Second

	DowngradeEnabledPath = "/downgrade/enabled"
)
View Source 
const PeerHashKVPath = "/members/hashkv"

Variables

View Source 
var (
	ErrUnknownMethod                 = errors.New("etcdserver: unknown method")
	ErrStopped                       = errors.New("etcdserver: server stopped")
	ErrCanceled                      = errors.New("etcdserver: request cancelled")
	ErrTimeout                       = errors.New("etcdserver: request timed out")
	ErrTimeoutDueToLeaderFail        = errors.New("etcdserver: request timed out, possibly due to previous leader failure")
	ErrTimeoutDueToConnectionLost    = errors.New("etcdserver: request timed out, possibly due to connection lost")
	ErrTimeoutLeaderTransfer         = errors.New("etcdserver: request timed out, leader transfer took too long")
	ErrLeaderChanged                 = errors.New("etcdserver: leader changed")
	ErrNotEnoughStartedMembers       = errors.New("etcdserver: re-configuration failed due to not enough started members")
	ErrLearnerNotReady               = errors.New("etcdserver: can only promote a learner member which is in sync with leader")
	ErrNoLeader                      = errors.New("etcdserver: no leader")
	ErrNotLeader                     = errors.New("etcdserver: not leader")
	ErrRequestTooLarge               = errors.New("etcdserver: request is too large")
	ErrNoSpace                       = errors.New("etcdserver: no space")
	ErrTooManyRequests               = errors.New("etcdserver: too many requests")
	ErrUnhealthy                     = errors.New("etcdserver: unhealthy cluster")
	ErrKeyNotFound                   = errors.New("etcdserver: key not found")
	ErrCorrupt                       = errors.New("etcdserver: corrupt cluster")
	ErrBadLeaderTransferee           = errors.New("etcdserver: bad leader transferee")
	ErrClusterVersionUnavailable     = errors.New("etcdserver: cluster version not found during downgrade")
	ErrWrongDowngradeVersionFormat   = errors.New("etcdserver: wrong downgrade target version format")
	ErrInvalidDowngradeTargetVersion = errors.New("etcdserver: invalid downgrade target version")
	ErrDowngradeInProcess            = errors.New("etcdserver: cluster has a downgrade job in progress")
	ErrNoInflightDowngrade           = errors.New("etcdserver: no inflight downgrade job")
)
View Source 
var (
	DefaultQuotaSize = humanize.Bytes(uint64(DefaultQuotaBytes))
)

Functions

func GetClusterFromRemotePeers 

func GetClusterFromRemotePeers(lg *zap.Logger, urls []string, rt http.RoundTripper) (*membership.RaftCluster, error)

GetClusterFromRemotePeers takes a set of URLs representing etcd peers, and attempts to construct a Cluster by accessing the members endpoint on one of these URLs. The first URL to provide a response is used. If no URLs provide a response, or a Cluster cannot be successfully created from a received response, an error is returned. Each request has a 10-second timeout. Because the upper limit of TTL is 5s, 10 second is enough for building connection and finishing request.

func NewRaftLogger 

func NewRaftLogger(lcfg *zap.Config) (raft.Logger, error)

NewRaftLogger builds "raft.Logger" from "*zap.Config".

func NewRaftLoggerFromZapCore 

func NewRaftLoggerFromZapCore(cr zapcore.Core, syncer zapcore.WriteSyncer) raft.Logger

NewRaftLoggerFromZapCore creates "raft.Logger" from "zap.Core" and "zapcore.WriteSyncer".

func NewRaftLoggerZap 

func NewRaftLoggerZap(lg *zap.Logger) raft.Logger

NewRaftLoggerZap converts "*zap.Logger" to "raft.Logger".

Types

type AccessController 

type AccessController struct {
	CORS map[string]struct{}

	HostWhitelist map[string]struct{}
	// contains filtered or unexported fields
}

AccessController controls etcd server HTTP request access.

func NewAccessController 

func NewAccessController() *AccessController

NewAccessController returns a new "AccessController" with default "*" values.

func (*AccessController) IsHostWhitelisted 

func (ac *AccessController) IsHostWhitelisted(host string) bool

IsHostWhitelisted returns true if the host is whitelisted. If whitelist is empty, allow all.

func (*AccessController) OriginAllowed 

func (ac *AccessController) OriginAllowed(origin string) bool

OriginAllowed determines whether the server will allow a given CORS origin. If CORS is empty, allow all.

type ApplierV2 

type ApplierV2 interface {
	Delete(r *RequestV2) Response
	Post(r *RequestV2) Response
	Put(r *RequestV2) Response
	QGet(r *RequestV2) Response
	Sync(r *RequestV2) Response
}

ApplierV2 is the interface for processing V2 raft messages

func NewApplierV2 

func NewApplierV2(lg *zap.Logger, s v2store.Store, c *membership.RaftCluster) ApplierV2

type Authenticator 

type Authenticator interface {
	AuthEnable(ctx context.Context, r *pb.AuthEnableRequest) (*pb.AuthEnableResponse, error)
	AuthDisable(ctx context.Context, r *pb.AuthDisableRequest) (*pb.AuthDisableResponse, error)
	AuthStatus(ctx context.Context, r *pb.AuthStatusRequest) (*pb.AuthStatusResponse, error)
	Authenticate(ctx context.Context, r *pb.AuthenticateRequest) (*pb.AuthenticateResponse, error)
	UserAdd(ctx context.Context, r *pb.AuthUserAddRequest) (*pb.AuthUserAddResponse, error)
	UserDelete(ctx context.Context, r *pb.AuthUserDeleteRequest) (*pb.AuthUserDeleteResponse, error)
	UserChangePassword(ctx context.Context, r *pb.AuthUserChangePasswordRequest) (*pb.AuthUserChangePasswordResponse, error)
	UserGrantRole(ctx context.Context, r *pb.AuthUserGrantRoleRequest) (*pb.AuthUserGrantRoleResponse, error)
	UserGet(ctx context.Context, r *pb.AuthUserGetRequest) (*pb.AuthUserGetResponse, error)
	UserRevokeRole(ctx context.Context, r *pb.AuthUserRevokeRoleRequest) (*pb.AuthUserRevokeRoleResponse, error)
	RoleAdd(ctx context.Context, r *pb.AuthRoleAddRequest) (*pb.AuthRoleAddResponse, error)
	RoleGrantPermission(ctx context.Context, r *pb.AuthRoleGrantPermissionRequest) (*pb.AuthRoleGrantPermissionResponse, error)
	RoleGet(ctx context.Context, r *pb.AuthRoleGetRequest) (*pb.AuthRoleGetResponse, error)
	RoleRevokePermission(ctx context.Context, r *pb.AuthRoleRevokePermissionRequest) (*pb.AuthRoleRevokePermissionResponse, error)
	RoleDelete(ctx context.Context, r *pb.AuthRoleDeleteRequest) (*pb.AuthRoleDeleteResponse, error)
	UserList(ctx context.Context, r *pb.AuthUserListRequest) (*pb.AuthUserListResponse, error)
	RoleList(ctx context.Context, r *pb.AuthRoleListRequest) (*pb.AuthRoleListResponse, error)
}

type DiscoveryError 

type DiscoveryError struct {
	Op  string
	Err error
}

func (DiscoveryError) Error 

func (e DiscoveryError) Error() string

type EtcdServer 

type EtcdServer struct {
	Cfg ServerConfig

	SyncTicker *time.Ticker

	*AccessController
	// contains filtered or unexported fields
}

EtcdServer is the production implementation of the Server interface

func NewServer 

func NewServer(cfg ServerConfig) (srv *EtcdServer, err error)

NewServer creates a new EtcdServer from the supplied configuration. The configuration is considered static for the lifetime of the EtcdServer.

func (*EtcdServer) AddMember 

func (s *EtcdServer) AddMember(ctx context.Context, memb membership.Member) ([]*membership.Member, error)

func (*EtcdServer) Alarm 

func (s *EtcdServer) Alarm(ctx context.Context, r *pb.AlarmRequest) (*pb.AlarmResponse, error)

func (*EtcdServer) Alarms 

func (s *EtcdServer) Alarms() []*pb.AlarmMember

func (*EtcdServer) AppliedIndex 

func (s *EtcdServer) AppliedIndex() uint64

func (*EtcdServer) ApplyWait 

func (s *EtcdServer) ApplyWait() <-chan struct{}

func (*EtcdServer) AuthDisable 

func (s *EtcdServer) AuthDisable(ctx context.Context, r *pb.AuthDisableRequest) (*pb.AuthDisableResponse, error)

func (*EtcdServer) AuthEnable 

func (s *EtcdServer) AuthEnable(ctx context.Context, r *pb.AuthEnableRequest) (*pb.AuthEnableResponse, error)

func (*EtcdServer) AuthInfoFromCtx 

func (s *EtcdServer) AuthInfoFromCtx(ctx context.Context) (*auth.AuthInfo, error)

func (*EtcdServer) AuthStatus 

func (s *EtcdServer) AuthStatus(ctx context.Context, r *pb.AuthStatusRequest) (*pb.AuthStatusResponse, error)

func (*EtcdServer) AuthStore 

func (s *EtcdServer) AuthStore() auth.AuthStore

func (*EtcdServer) Authenticate 

func (s *EtcdServer) Authenticate(ctx context.Context, r *pb.AuthenticateRequest) (*pb.AuthenticateResponse, error)

func (*EtcdServer) Backend 

func (s *EtcdServer) Backend() backend.Backend

func (*EtcdServer) CheckInitialHashKV 

func (s *EtcdServer) CheckInitialHashKV() error

CheckInitialHashKV compares initial hash values with its peers before serving any peer/client traffic. Only mismatch when hashes are different at requested revision, with same compact revision.

func (*EtcdServer) ClientCertAuthEnabled 

func (s *EtcdServer) ClientCertAuthEnabled() bool

func (*EtcdServer) Cluster 

func (s *EtcdServer) Cluster() api.Cluster

func (*EtcdServer) ClusterVersion 

func (s *EtcdServer) ClusterVersion() *semver.Version

func (*EtcdServer) CommittedIndex 

func (s *EtcdServer) CommittedIndex() uint64

func (*EtcdServer) Compact 

func (s *EtcdServer) Compact(ctx context.Context, r *pb.CompactionRequest) (*pb.CompactionResponse, error)

func (*EtcdServer) CutPeer 

func (s *EtcdServer) CutPeer(id types.ID)

CutPeer drops messages to the specified peer.

func (*EtcdServer) DeleteRange 

func (s *EtcdServer) DeleteRange(ctx context.Context, r *pb.DeleteRangeRequest) (*pb.DeleteRangeResponse, error)

func (*EtcdServer) Do 

func (s *EtcdServer) Do(ctx context.Context, r pb.Request) (Response, error)

func (*EtcdServer) Downgrade 

func (s *EtcdServer) Downgrade(ctx context.Context, r *pb.DowngradeRequest) (*pb.DowngradeResponse, error)

func (*EtcdServer) DowngradeEnabledHandler 

func (s *EtcdServer) DowngradeEnabledHandler() http.Handler

func (*EtcdServer) DowngradeInfo 

func (s *EtcdServer) DowngradeInfo() *membership.DowngradeInfo

func (*EtcdServer) GoAttach 

func (s *EtcdServer) GoAttach(f func())

GoAttach creates a goroutine on a given function and tracks it using the etcdserver waitgroup. The passed function should interrupt on s.StoppingNotify().

func (*EtcdServer) HardStop 

func (s *EtcdServer) HardStop()

HardStop stops the server without coordination with other members in the cluster.

func (*EtcdServer) HashKVHandler 

func (s *EtcdServer) HashKVHandler() http.Handler

func (*EtcdServer) ID 

func (s *EtcdServer) ID() types.ID

func (*EtcdServer) IsIDRemoved 

func (s *EtcdServer) IsIDRemoved(id uint64) bool

func (*EtcdServer) IsLearner 

func (s *EtcdServer) IsLearner() bool

IsLearner returns if the local member is raft learner

func (*EtcdServer) IsMemberExist 

func (s *EtcdServer) IsMemberExist(id types.ID) bool

IsMemberExist returns if the member with the given id exists in cluster.

func (*EtcdServer) KV 

func (s *EtcdServer) KV() mvcc.ConsistentWatchableKV

func (*EtcdServer) Lead 

func (s *EtcdServer) Lead() uint64

func (*EtcdServer) Leader 

func (s *EtcdServer) Leader() types.ID

func (*EtcdServer) LeaderStats 

func (s *EtcdServer) LeaderStats() []byte

func (*EtcdServer) LeaseGrant 

func (s *EtcdServer) LeaseGrant(ctx context.Context, r *pb.LeaseGrantRequest) (*pb.LeaseGrantResponse, error)

func (*EtcdServer) LeaseHandler 

func (s *EtcdServer) LeaseHandler() http.Handler

func (*EtcdServer) LeaseLeases 

func (s *EtcdServer) LeaseLeases(ctx context.Context, r *pb.LeaseLeasesRequest) (*pb.LeaseLeasesResponse, error)

func (*EtcdServer) LeaseRenew 

func (s *EtcdServer) LeaseRenew(ctx context.Context, id lease.LeaseID) (int64, error)

func (*EtcdServer) LeaseRevoke 

func (s *EtcdServer) LeaseRevoke(ctx context.Context, r *pb.LeaseRevokeRequest) (*pb.LeaseRevokeResponse, error)

func (*EtcdServer) LeaseTimeToLive 

func (s *EtcdServer) LeaseTimeToLive(ctx context.Context, r *pb.LeaseTimeToLiveRequest) (*pb.LeaseTimeToLiveResponse, error)

func (*EtcdServer) LinearizableReadNotify 

func (s *EtcdServer) LinearizableReadNotify(ctx context.Context) error

func (*EtcdServer) Logger 

func (s *EtcdServer) Logger() *zap.Logger

func (*EtcdServer) MendPeer 

func (s *EtcdServer) MendPeer(id types.ID)

MendPeer recovers the message dropping behavior of the given peer.

func (*EtcdServer) MoveLeader 

func (s *EtcdServer) MoveLeader(ctx context.Context, lead, transferee uint64) error

MoveLeader transfers the leader to the given transferee.

func (*EtcdServer) PauseSending 

func (s *EtcdServer) PauseSending()

func (*EtcdServer) Process 

func (s *EtcdServer) Process(ctx context.Context, m raftpb.Message) error

Process takes a raft message and applies it to the server's raft state machine, respecting any timeout of the given context.

func (*EtcdServer) PromoteMember 

func (s *EtcdServer) PromoteMember(ctx context.Context, id uint64) ([]*membership.Member, error)

PromoteMember promotes a learner node to a voting node.

func (*EtcdServer) Put 

func (s *EtcdServer) Put(ctx context.Context, r *pb.PutRequest) (*pb.PutResponse, error)

func (*EtcdServer) RaftHandler 

func (s *EtcdServer) RaftHandler() http.Handler

func (*EtcdServer) Range 

func (s *EtcdServer) Range(ctx context.Context, r *pb.RangeRequest) (*pb.RangeResponse, error)

func (*EtcdServer) ReadyNotify 

func (s *EtcdServer) ReadyNotify() <-chan struct{}

ReadyNotify returns a channel that will be closed when the server is ready to serve client requests

func (*EtcdServer) RemoveMember 

func (s *EtcdServer) RemoveMember(ctx context.Context, id uint64) ([]*membership.Member, error)

func (*EtcdServer) ReportSnapshot 

func (s *EtcdServer) ReportSnapshot(id uint64, status raft.SnapshotStatus)

ReportSnapshot reports snapshot sent status to the raft state machine, and clears the used snapshot from the snapshot store.

func (*EtcdServer) ReportUnreachable 

func (s *EtcdServer) ReportUnreachable(id uint64)

func (*EtcdServer) ResumeSending 

func (s *EtcdServer) ResumeSending()

func (*EtcdServer) RoleAdd 

func (s *EtcdServer) RoleAdd(ctx context.Context, r *pb.AuthRoleAddRequest) (*pb.AuthRoleAddResponse, error)

func (*EtcdServer) RoleDelete 

func (s *EtcdServer) RoleDelete(ctx context.Context, r *pb.AuthRoleDeleteRequest) (*pb.AuthRoleDeleteResponse, error)

func (*EtcdServer) RoleGet 

func (s *EtcdServer) RoleGet(ctx context.Context, r *pb.AuthRoleGetRequest) (*pb.AuthRoleGetResponse, error)

func (*EtcdServer) RoleGrantPermission 

func (s *EtcdServer) RoleGrantPermission(ctx context.Context, r *pb.AuthRoleGrantPermissionRequest) (*pb.AuthRoleGrantPermissionResponse, error)

func (*EtcdServer) RoleList 

func (s *EtcdServer) RoleList(ctx context.Context, r *pb.AuthRoleListRequest) (*pb.AuthRoleListResponse, error)

func (*EtcdServer) RoleRevokePermission 

func (s *EtcdServer) RoleRevokePermission(ctx context.Context, r *pb.AuthRoleRevokePermissionRequest) (*pb.AuthRoleRevokePermissionResponse, error)

func (*EtcdServer) SelfStats 

func (s *EtcdServer) SelfStats() []byte

func (*EtcdServer) Start 

func (s *EtcdServer) Start()

Start performs any initialization of the Server necessary for it to begin serving requests. It must be called before Do or Process. Start must be non-blocking; any long-running server functionality should be implemented in goroutines.

func (*EtcdServer) Stop 

func (s *EtcdServer) Stop()

Stop stops the server gracefully, and shuts down the running goroutine. Stop should be called after a Start(s), otherwise it will block forever. When stopping leader, Stop transfers its leadership to one of its peers before stopping the server. Stop terminates the Server and performs any necessary finalization. Do and Process cannot be called after Stop has been invoked.

func (*EtcdServer) StopNotify 

func (s *EtcdServer) StopNotify() <-chan struct{}

StopNotify returns a channel that receives a empty struct when the server is stopped.

func (*EtcdServer) StoppingNotify 

func (s *EtcdServer) StoppingNotify() <-chan struct{}

StoppingNotify returns a channel that receives a empty struct when the server is being stopped.

func (*EtcdServer) StoreStats 

func (s *EtcdServer) StoreStats() []byte

func (*EtcdServer) Term 

func (s *EtcdServer) Term() uint64

func (*EtcdServer) TransferLeadership 

func (s *EtcdServer) TransferLeadership() error

TransferLeadership transfers the leader to the chosen transferee.

func (*EtcdServer) Txn 

func (s *EtcdServer) Txn(ctx context.Context, r *pb.TxnRequest) (*pb.TxnResponse, error)

func (*EtcdServer) UpdateMember 

func (s *EtcdServer) UpdateMember(ctx context.Context, memb membership.Member) ([]*membership.Member, error)

func (*EtcdServer) UserAdd 

func (s *EtcdServer) UserAdd(ctx context.Context, r *pb.AuthUserAddRequest) (*pb.AuthUserAddResponse, error)

func (*EtcdServer) UserChangePassword 

func (s *EtcdServer) UserChangePassword(ctx context.Context, r *pb.AuthUserChangePasswordRequest) (*pb.AuthUserChangePasswordResponse, error)

func (*EtcdServer) UserDelete 

func (s *EtcdServer) UserDelete(ctx context.Context, r *pb.AuthUserDeleteRequest) (*pb.AuthUserDeleteResponse, error)

func (*EtcdServer) UserGet 

func (s *EtcdServer) UserGet(ctx context.Context, r *pb.AuthUserGetRequest) (*pb.AuthUserGetResponse, error)

func (*EtcdServer) UserGrantRole 

func (s *EtcdServer) UserGrantRole(ctx context.Context, r *pb.AuthUserGrantRoleRequest) (*pb.AuthUserGrantRoleResponse, error)

func (*EtcdServer) UserList 

func (s *EtcdServer) UserList(ctx context.Context, r *pb.AuthUserListRequest) (*pb.AuthUserListResponse, error)

func (*EtcdServer) UserRevokeRole 

func (s *EtcdServer) UserRevokeRole(ctx context.Context, r *pb.AuthUserRevokeRoleRequest) (*pb.AuthUserRevokeRoleResponse, error)

func (*EtcdServer) Watchable 

func (s *EtcdServer) Watchable() mvcc.WatchableKV

Watchable returns a watchable interface attached to the etcdserver.

type Lessor 

type Lessor interface {
	// LeaseGrant sends LeaseGrant request to raft and apply it after committed.
	LeaseGrant(ctx context.Context, r *pb.LeaseGrantRequest) (*pb.LeaseGrantResponse, error)
	// LeaseRevoke sends LeaseRevoke request to raft and apply it after committed.
	LeaseRevoke(ctx context.Context, r *pb.LeaseRevokeRequest) (*pb.LeaseRevokeResponse, error)

	// LeaseRenew renews the lease with given ID. The renewed TTL is returned. Or an error
	// is returned.
	LeaseRenew(ctx context.Context, id lease.LeaseID) (int64, error)

	// LeaseTimeToLive retrieves lease information.
	LeaseTimeToLive(ctx context.Context, r *pb.LeaseTimeToLiveRequest) (*pb.LeaseTimeToLiveResponse, error)

	// LeaseLeases lists all leases.
	LeaseLeases(ctx context.Context, r *pb.LeaseLeasesRequest) (*pb.LeaseLeasesResponse, error)
}

type Quota 

type Quota interface {
	// Available judges whether the given request fits within the quota.
	Available(req interface{}) bool
	// Cost computes the charge against the quota for a given request.
	Cost(req interface{}) int
	// Remaining is the amount of charge left for the quota.
	Remaining() int64
}

Quota represents an arbitrary quota against arbitrary requests. Each request costs some charge; if there is not enough remaining charge, then there are too few resources available within the quota to apply the request.

func NewBackendQuota 

func NewBackendQuota(s *EtcdServer, name string) Quota

NewBackendQuota creates a quota layer with the given storage limit.

type RaftKV 

type RaftKV interface {
	Range(ctx context.Context, r *pb.RangeRequest) (*pb.RangeResponse, error)
	Put(ctx context.Context, r *pb.PutRequest) (*pb.PutResponse, error)
	DeleteRange(ctx context.Context, r *pb.DeleteRangeRequest) (*pb.DeleteRangeResponse, error)
	Txn(ctx context.Context, r *pb.TxnRequest) (*pb.TxnResponse, error)
	Compact(ctx context.Context, r *pb.CompactionRequest) (*pb.CompactionResponse, error)
}

type RaftStatusGetter 

type RaftStatusGetter interface {
	ID() types.ID
	Leader() types.ID
	CommittedIndex() uint64
	AppliedIndex() uint64
	Term() uint64
}

RaftStatusGetter represents etcd server and Raft progress.

type RequestV2 

type RequestV2 pb.Request

func (*RequestV2) Handle 

func (r *RequestV2) Handle(ctx context.Context, v2api RequestV2Handler) (Response, error)

Handle interprets r and performs an operation on s.store according to r.Method and other fields. If r.Method is "POST", "PUT", "DELETE", or a "GET" with Quorum == true, r will be sent through consensus before performing its respective operation. Do will block until an action is performed or there is an error.

func (*RequestV2) String 

func (r *RequestV2) String() string

func (*RequestV2) TTLOptions 

func (r *RequestV2) TTLOptions() v2store.TTLOptionSet

type RequestV2Handler 

type RequestV2Handler interface {
	Post(ctx context.Context, r *RequestV2) (Response, error)
	Put(ctx context.Context, r *RequestV2) (Response, error)
	Delete(ctx context.Context, r *RequestV2) (Response, error)
	QGet(ctx context.Context, r *RequestV2) (Response, error)
	Get(ctx context.Context, r *RequestV2) (Response, error)
	Head(ctx context.Context, r *RequestV2) (Response, error)
}

func NewStoreRequestV2Handler 

func NewStoreRequestV2Handler(s v2store.Store, applier ApplierV2) RequestV2Handler

type Response 

type Response struct {
	Term    uint64
	Index   uint64
	Event   *v2store.Event
	Watcher v2store.Watcher
	Err     error
}

type Server 

type Server interface {
	// AddMember attempts to add a member into the cluster. It will return
	// ErrIDRemoved if member ID is removed from the cluster, or return
	// ErrIDExists if member ID exists in the cluster.
	AddMember(ctx context.Context, memb membership.Member) ([]*membership.Member, error)
	// RemoveMember attempts to remove a member from the cluster. It will
	// return ErrIDRemoved if member ID is removed from the cluster, or return
	// ErrIDNotFound if member ID is not in the cluster.
	RemoveMember(ctx context.Context, id uint64) ([]*membership.Member, error)
	// UpdateMember attempts to update an existing member in the cluster. It will
	// return ErrIDNotFound if the member ID does not exist.
	UpdateMember(ctx context.Context, updateMemb membership.Member) ([]*membership.Member, error)
	// PromoteMember attempts to promote a non-voting node to a voting node. It will
	// return ErrIDNotFound if the member ID does not exist.
	// return ErrLearnerNotReady if the member are not ready.
	// return ErrMemberNotLearner if the member is not a learner.
	PromoteMember(ctx context.Context, id uint64) ([]*membership.Member, error)

	// ClusterVersion is the cluster-wide minimum major.minor version.
	// Cluster version is set to the min version that an etcd member is
	// compatible with when first bootstrap.
	//
	// ClusterVersion is nil until the cluster is bootstrapped (has a quorum).
	//
	// During a rolling upgrades, the ClusterVersion will be updated
	// automatically after a sync. (5 second by default)
	//
	// The API/raft component can utilize ClusterVersion to determine if
	// it can accept a client request or a raft RPC.
	// NOTE: ClusterVersion might be nil when etcd 2.1 works with etcd 2.0 and
	// the leader is etcd 2.0. etcd 2.0 leader will not update clusterVersion since
	// this feature is introduced post 2.0.
	ClusterVersion() *semver.Version
	Cluster() api.Cluster
	Alarms() []*pb.AlarmMember
}

type ServerConfig 

type ServerConfig struct {
	Name           string
	DiscoveryURL   string
	DiscoveryProxy string
	ClientURLs     types.URLs
	PeerURLs       types.URLs
	DataDir        string
	// DedicatedWALDir config will make the etcd to write the WAL to the WALDir
	// rather than the dataDir/member/wal.
	DedicatedWALDir string

	SnapshotCount uint64

	// SnapshotCatchUpEntries is the number of entries for a slow follower
	// to catch-up after compacting the raft storage entries.
	// We expect the follower has a millisecond level latency with the leader.
	// The max throughput is around 10K. Keep a 5K entries is enough for helping
	// follower to catch up.
	// WARNING: only change this for tests. Always use "DefaultSnapshotCatchUpEntries"
	SnapshotCatchUpEntries uint64

	MaxSnapFiles uint
	MaxWALFiles  uint

	// BackendBatchInterval is the maximum time before commit the backend transaction.
	BackendBatchInterval time.Duration
	// BackendBatchLimit is the maximum operations before commit the backend transaction.
	BackendBatchLimit int

	// BackendFreelistType is the type of the backend boltdb freelist.
	BackendFreelistType bolt.FreelistType

	InitialPeerURLsMap  types.URLsMap
	InitialClusterToken string
	NewCluster          bool
	PeerTLSInfo         transport.TLSInfo

	CORS map[string]struct{}

	// HostWhitelist lists acceptable hostnames from client requests.
	// If server is insecure (no TLS), server only accepts requests
	// whose Host header value exists in this white list.
	HostWhitelist map[string]struct{}

	TickMs        uint
	ElectionTicks int

	// InitialElectionTickAdvance is true, then local member fast-forwards
	// election ticks to speed up "initial" leader election trigger. This
	// benefits the case of larger election ticks. For instance, cross
	// datacenter deployment may require longer election timeout of 10-second.
	// If true, local node does not need wait up to 10-second. Instead,
	// forwards its election ticks to 8-second, and have only 2-second left
	// before leader election.
	//
	// Major assumptions are that:
	//  - cluster has no active leader thus advancing ticks enables faster
	//    leader election, or
	//  - cluster already has an established leader, and rejoining follower
	//    is likely to receive heartbeats from the leader after tick advance
	//    and before election timeout.
	//
	// However, when network from leader to rejoining follower is congested,
	// and the follower does not receive leader heartbeat within left election
	// ticks, disruptive election has to happen thus affecting cluster
	// availabilities.
	//
	// Disabling this would slow down initial bootstrap process for cross
	// datacenter deployments. Make your own tradeoffs by configuring
	// --initial-election-tick-advance at the cost of slow initial bootstrap.
	//
	// If single-node, it advances ticks regardless.
	//
	// See https://github.com/etcd-io/etcd/issues/9333 for more detail.
	InitialElectionTickAdvance bool

	BootstrapTimeout time.Duration

	AutoCompactionRetention time.Duration
	AutoCompactionMode      string
	CompactionBatchLimit    int
	QuotaBackendBytes       int64
	MaxTxnOps               uint

	// MaxRequestBytes is the maximum request size to send over raft.
	MaxRequestBytes uint

	WarningApplyDuration time.Duration

	StrictReconfigCheck bool

	// ClientCertAuthEnabled is true when cert has been signed by the client CA.
	ClientCertAuthEnabled bool

	AuthToken  string
	BcryptCost uint
	TokenTTL   uint

	// InitialCorruptCheck is true to check data corruption on boot
	// before serving any peer/client traffic.
	InitialCorruptCheck bool
	CorruptCheckTime    time.Duration

	// PreVote is true to enable Raft Pre-Vote.
	PreVote bool

	// Logger logs server-side operations.
	// If not nil, it disables "capnslog" and uses the given logger.
	Logger *zap.Logger

	// LoggerConfig is server logger configuration for Raft logger.
	// Must be either: "LoggerConfig != nil" or "LoggerCore != nil && LoggerWriteSyncer != nil".
	LoggerConfig *zap.Config
	// LoggerCore is "zapcore.Core" for raft logger.
	// Must be either: "LoggerConfig != nil" or "LoggerCore != nil && LoggerWriteSyncer != nil".
	LoggerCore        zapcore.Core
	LoggerWriteSyncer zapcore.WriteSyncer

	ForceNewCluster bool

	// EnableLeaseCheckpoint enables primary lessor to persist lease remainingTTL to prevent indefinite auto-renewal of long lived leases.
	EnableLeaseCheckpoint bool
	// LeaseCheckpointInterval time.Duration is the wait duration between lease checkpoints.
	LeaseCheckpointInterval time.Duration

	EnableGRPCGateway bool

	WatchProgressNotifyInterval time.Duration

	// UnsafeNoFsync disables all uses of fsync.
	// Setting this is unsafe and will cause data loss.
	UnsafeNoFsync bool `json:"unsafe-no-fsync"`

	DowngradeCheckTime time.Duration
}

ServerConfig holds the configuration of etcd as taken from the command line or discovery.

func (*ServerConfig) MemberDir 

func (c *ServerConfig) MemberDir() string

func (*ServerConfig) ReqTimeout 

func (c *ServerConfig) ReqTimeout() time.Duration

ReqTimeout returns timeout for request to finish.

func (*ServerConfig) ShouldDiscover 

func (c *ServerConfig) ShouldDiscover() bool

func (*ServerConfig) SnapDir 

func (c *ServerConfig) SnapDir() string

func (*ServerConfig) VerifyBootstrap 

func (c *ServerConfig) VerifyBootstrap() error

VerifyBootstrap sanity-checks the initial config for bootstrap case and returns an error for things that should never happen.

func (*ServerConfig) VerifyJoinExisting 

func (c *ServerConfig) VerifyJoinExisting() error

VerifyJoinExisting sanity-checks the initial config for join existing cluster case and returns an error for things that should never happen.

func (*ServerConfig) WALDir 

func (c *ServerConfig) WALDir() string

type ServerPeer 

type ServerPeer interface {
	ServerV2
	RaftHandler() http.Handler
	LeaseHandler() http.Handler
}

type ServerPeerV2 

type ServerPeerV2 interface {
	ServerPeer
	HashKVHandler() http.Handler
	DowngradeEnabledHandler() http.Handler
}

type ServerV2 

type ServerV2 interface {
	Server
	Leader() types.ID

	// Do takes a V2 request and attempts to fulfill it, returning a Response.
	Do(ctx context.Context, r pb.Request) (Response, error)
	stats.Stats
	ClientCertAuthEnabled() bool
}

type ServerV3 

type ServerV3 interface {
	Server
	RaftStatusGetter
}

type Storage 

type Storage interface {
	// Save function saves ents and state to the underlying stable storage.
	// Save MUST block until st and ents are on stable storage.
	Save(st raftpb.HardState, ents []raftpb.Entry) error
	// SaveSnap function saves snapshot to the underlying stable storage.
	SaveSnap(snap raftpb.Snapshot) error
	// Close closes the Storage and performs finalization.
	Close() error
	// Release releases the locked wal files older than the provided snapshot.
	Release(snap raftpb.Snapshot) error
	// Sync WAL
	Sync() error
}

func NewStorage 

func NewStorage(w *wal.WAL, s *snap.Snapshotter) Storage

Source Files

View all Source files

Directories

Path Synopsis
api
Package api manages the capabilities and features that are exposed to clients by the etcd cluster.
 Package api manages the capabilities and features that are exposed to clients by the etcd cluster.
etcdhttp
Package etcdhttp implements HTTP transportation layer for etcdserver.
 Package etcdhttp implements HTTP transportation layer for etcdserver.
membership
Package membership describes individual etcd members and clusters of members.
 Package membership describes individual etcd members and clusters of members.
rafthttp
Package rafthttp implements HTTP transportation layer for etcd/raft pkg.
 Package rafthttp implements HTTP transportation layer for etcd/raft pkg.
snap
Package snap handles Raft nodes' states with snapshots.
 Package snap handles Raft nodes' states with snapshots.
snap/snappb
v2auth
Package v2auth implements etcd authentication.
 Package v2auth implements etcd authentication.
v2discovery
Package v2discovery provides an implementation of the cluster discovery that is used by etcd with v2 client.
 Package v2discovery provides an implementation of the cluster discovery that is used by etcd with v2 client.
v2error
Package v2error describes errors in etcd project.
 Package v2error describes errors in etcd project.
v2http
Package v2http provides etcd client and server implementations.
 Package v2http provides etcd client and server implementations.
v2http/httptypes
Package httptypes defines how etcd's HTTP API entities are serialized to and deserialized from JSON.
 Package httptypes defines how etcd's HTTP API entities are serialized to and deserialized from JSON.
v2stats
Package v2stats defines a standard interface for etcd cluster statistics.
 Package v2stats defines a standard interface for etcd cluster statistics.
v2store
Package v2store defines etcd's in-memory key/value store in v2 API.
 Package v2store defines etcd's in-memory key/value store in v2 API.
v2v3
Package v2v3 provides a ServerV2 implementation backed by clientv3.Client.
 Package v2v3 provides a ServerV2 implementation backed by clientv3.Client.
v3alarm
Package v3alarm manages health status alarms in etcd.
 Package v3alarm manages health status alarms in etcd.
v3client
Package v3client provides clientv3 interfaces from an etcdserver.
 Package v3client provides clientv3 interfaces from an etcdserver.
v3compactor
Package v3compactor implements automated policies for compacting etcd's mvcc storage.
 Package v3compactor implements automated policies for compacting etcd's mvcc storage.
v3election
Package v3election provides a v3 election service from an etcdserver.
 Package v3election provides a v3 election service from an etcdserver.
v3election/v3electionpb
v3election/v3electionpb/gw
Package v3electionpb is a reverse proxy.
 Package v3electionpb is a reverse proxy.
v3lock
Package v3lock provides a v3 locking service from an etcdserver.
 Package v3lock provides a v3 locking service from an etcdserver.
v3lock/v3lockpb
v3lock/v3lockpb/gw
Package v3lockpb is a reverse proxy.
 Package v3lockpb is a reverse proxy.
v3rpc
Package v3rpc implements etcd v3 RPC system based on gRPC.
 Package v3rpc implements etcd v3 RPC system based on gRPC.
Package cindex provides an interface and implementation for getting/saving consistentIndex.
 Package cindex provides an interface and implementation for getting/saving consistentIndex.

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