etcdserver

package
Version: v3.0.14+incompatible Latest Latest
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Published: Nov 4, 2016 License: Apache-2.0 Imports: 58 Imported by: 0

Documentation

Overview

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

Index

Constants

View Source
const (
	DefaultSnapCount = 10000

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

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")
	ErrNotEnoughStartedMembers    = errors.New("etcdserver: re-configuration failed due to not enough started members")
	ErrNoLeader                   = errors.New("etcdserver: no leader")
	ErrRequestTooLarge            = errors.New("etcdserver: request is too large")
	ErrNoSpace                    = errors.New("etcdserver: no space")
	ErrInvalidAuthToken           = errors.New("etcdserver: invalid auth token")
)

Functions

func GetClusterFromRemotePeers

func GetClusterFromRemotePeers(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.

Types

type ApplierV2

type ApplierV2 interface {
	Delete(r *pb.Request) Response
	Post(r *pb.Request) Response
	Put(r *pb.Request) Response
	QGet(r *pb.Request) Response
	Sync(r *pb.Request) Response
}

ApplierV2 is the interface for processing V2 raft messages

func NewApplierV2

func NewApplierV2(s store.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)
	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 <-chan time.Time
	// 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) error

func (*EtcdServer) Alarm

func (*EtcdServer) AuthDisable

func (*EtcdServer) AuthEnable

func (*EtcdServer) AuthStore

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

func (*EtcdServer) Authenticate

func (*EtcdServer) Backend

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

func (*EtcdServer) Cluster

func (s *EtcdServer) Cluster() *membership.RaftCluster

func (*EtcdServer) ClusterVersion

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

func (*EtcdServer) Compact

func (*EtcdServer) DeleteRange

func (*EtcdServer) Do

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

Do 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 (*EtcdServer) ID

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

func (*EtcdServer) Index

func (s *EtcdServer) Index() uint64

func (*EtcdServer) IsIDRemoved

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

func (*EtcdServer) IsPprofEnabled

func (s *EtcdServer) IsPprofEnabled() bool

func (*EtcdServer) KV

func (*EtcdServer) Lead

func (s *EtcdServer) Lead() uint64

Lead is only for testing purposes. TODO: add Raft server interface to expose raft related info: Index, Term, Lead, Committed, Applied, LastIndex, etc.

func (*EtcdServer) Leader

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

func (*EtcdServer) LeaderStats

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

func (*EtcdServer) LeaseGrant

func (*EtcdServer) LeaseRenew

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

func (*EtcdServer) LeaseRevoke

func (*EtcdServer) Lessor

func (s *EtcdServer) Lessor() lease.Lessor

func (*EtcdServer) PauseSending

func (s *EtcdServer) PauseSending()

func (*EtcdServer) Process

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

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 (*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) 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 (*EtcdServer) RoleDelete

func (*EtcdServer) RoleGet

func (*EtcdServer) RoleList

func (*EtcdServer) SelfStats

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

func (*EtcdServer) Start

func (s *EtcdServer) Start()

Start prepares and starts server in a new goroutine. It is no longer safe to modify a server's fields after it has been sent to Start. It also starts a goroutine to publish its server information.

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.

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) StoreStats

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

func (*EtcdServer) Term

func (s *EtcdServer) Term() uint64

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) error

func (*EtcdServer) UserAdd

func (*EtcdServer) UserDelete

func (*EtcdServer) UserGet

func (*EtcdServer) UserGrantRole

func (*EtcdServer) UserList

func (*EtcdServer) UserRevokeRole

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(id lease.LeaseID) (int64, 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) Quota

type RaftTimer

type RaftTimer interface {
	Index() uint64
	Term() uint64
}

type Response

type Response struct {
	Event   *store.Event
	Watcher store.Watcher
	// contains filtered or unexported fields
}

type Server

type Server interface {
	// 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.
	Start()
	// Stop terminates the Server and performs any necessary finalization.
	// Do and Process cannot be called after Stop has been invoked.
	Stop()
	// ID returns the ID of the Server.
	ID() types.ID
	// Leader returns the ID of the leader Server.
	Leader() types.ID
	// Do takes a request and attempts to fulfill it, returning a Response.
	Do(ctx context.Context, r pb.Request) (Response, error)
	// Process takes a raft message and applies it to the server's raft state
	// machine, respecting any timeout of the given context.
	Process(ctx context.Context, m raftpb.Message) error
	// 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) 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) 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) 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
}

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
	SnapCount           uint64
	MaxSnapFiles        uint
	MaxWALFiles         uint
	InitialPeerURLsMap  types.URLsMap
	InitialClusterToken string
	NewCluster          bool
	ForceNewCluster     bool
	PeerTLSInfo         transport.TLSInfo

	TickMs           uint
	ElectionTicks    int
	BootstrapTimeout time.Duration

	AutoCompactionRetention int
	QuotaBackendBytes       int64

	StrictReconfigCheck bool

	EnablePprof bool

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

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

func (*ServerConfig) MemberDir

func (c *ServerConfig) MemberDir() string

func (*ServerConfig) Print

func (c *ServerConfig) Print()

func (*ServerConfig) PrintWithInitial

func (c *ServerConfig) PrintWithInitial()

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 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
	// DBFilePath returns the file path of database snapshot saved with given
	// id.
	DBFilePath(id uint64) (string, error)
	// Close closes the Storage and performs finalization.
	Close() error
}

func NewStorage

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

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.
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.
v3rpc
Package v3rpc implements etcd v3 RPC system based on gRPC.
Package v3rpc implements etcd v3 RPC system based on gRPC.
v3rpc/rpctypes
Package rpctypes has types and values shared by the etcd server and client for v3 RPC interaction.
Package rpctypes has types and values shared by the etcd server and client for v3 RPC interaction.
Package auth implements etcd authentication.
Package auth implements etcd authentication.
Package etcdserverpb is a generated protocol buffer package.
Package etcdserverpb is a generated protocol buffer package.
Package stats defines a standard interface for etcd cluster statistics.
Package stats defines a standard interface for etcd cluster statistics.

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