cluster

package
v0.13.1 Latest Latest
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 Go to latest Published: Nov 28, 2019 License: AGPL-3.0 Imports: 29 Imported by: 0

Documentation

Index

Constants

This section is empty.

Variables

View Source 
var (
	Mode    NodeMode
	Manager ClusterManager
	Tracer  opentracing.Tracer

	InsufficientShardsAvailable = NewError(http.StatusServiceUnavailable, errors.New("Insufficient shards available."))
)
View Source 
var (
	ClusterName string

	GossipSettlePeriod time.Duration // if gossip not enabled, will be 0 regardless of config

)

Functions

func ConfigProcess 

func ConfigProcess()

func ConfigSetup 

func ConfigSetup()

func Init 

func Init(name, version string, started time.Time, apiScheme string, apiPort int)

func MembersForSpeculativeQuery 

func MembersForSpeculativeQuery() (map[int32][]Node, error)

MembersForSpeculativeQuery returns a prioritized list of nodes for each shard group keyed by the first (lowest) partition of their shard group

func Start 

func Start()

func Stop 

func Stop()

Types

type ClusterManager 

type ClusterManager interface {
	IsPrimary() bool
	SetPrimary(bool)
	IsReady() bool
	SetReady()
	SetState(NodeState)
	ThisNode() Node
	MemberList(bool, bool) []Node
	Join([]string) (int, error)
	GetPartitions() []int32
	SetPartitions([]int32)
	SetPriority(int)
	Stop()
	Start()
}

type Error 

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

func NewError 

func NewError(code int, err error) *Error

func (*Error) Code 

func (r *Error) Code() int

implement response.Response

func (*Error) Error 

func (r *Error) Error() string

implement errors.Error interface

type HTTPNode 

type HTTPNode struct {
	Name          string    `json:"name"`
	Version       string    `json:"version"`
	Primary       bool      `json:"primary"`
	PrimaryChange time.Time `json:"primaryChange"`
	Mode          NodeMode  `json:"mode"`
	State         NodeState `json:"state"`
	Priority      int       `json:"priority"`
	Started       time.Time `json:"started"`
	StateChange   time.Time `json:"stateChange"`
	Partitions    []int32   `json:"partitions"`
	ApiPort       int       `json:"apiPort"`
	ApiScheme     string    `json:"apiScheme"`
	Updated       time.Time `json:"updated"`
	RemoteAddr    string    `json:"remoteAddr"`
	// contains filtered or unexported fields
}

func (HTTPNode) GetName 

func (n HTTPNode) GetName() string

func (HTTPNode) GetPartitions 

func (n HTTPNode) GetPartitions() []int32

func (HTTPNode) GetPriority 

func (n HTTPNode) GetPriority() int

func (HTTPNode) HasData added in v0.12.0 

func (n HTTPNode) HasData() bool

func (HTTPNode) IsLocal 

func (n HTTPNode) IsLocal() bool

func (HTTPNode) IsReady 

func (n HTTPNode) IsReady() bool

func (HTTPNode) Post 

func (n HTTPNode) Post(ctx context.Context, name, path string, body Traceable) (ret []byte, err error)

func (HTTPNode) RemoteURL 

func (n HTTPNode) RemoteURL() string

func (*HTTPNode) SetPartitions added in v0.12.0 

func (n *HTTPNode) SetPartitions(part []int32)

SetPartitions sets the partitions that this node is handling

func (*HTTPNode) SetPrimary added in v0.12.0 

func (n *HTTPNode) SetPrimary(primary bool) bool

SetPrimary sets the primary state of the node and returns whether it changed

func (*HTTPNode) SetPriority added in v0.12.0 

func (n *HTTPNode) SetPriority(prio int) bool

SetPriority sets the priority of the node and returns whether it changed

func (*HTTPNode) SetState added in v0.12.0 

func (n *HTTPNode) SetState(state NodeState) bool

SetState sets the state of the node and returns whether the state changed

type HTTPNodesByName 

type HTTPNodesByName []HTTPNode

func (HTTPNodesByName) Len 

func (n HTTPNodesByName) Len() int

func (HTTPNodesByName) Less 

func (n HTTPNodesByName) Less(i, j int) bool

func (HTTPNodesByName) Swap 

func (n HTTPNodesByName) Swap(i, j int)

type InvalidNodeModeErr added in v0.12.0 

type InvalidNodeModeErr string

func (InvalidNodeModeErr) Error added in v0.12.0 

func (e InvalidNodeModeErr) Error() string

type MemberlistManager 

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

func NewMemberlistManager 

func NewMemberlistManager(thisNode HTTPNode) *MemberlistManager

func (*MemberlistManager) BroadcastUpdate 

func (c *MemberlistManager) BroadcastUpdate()

func (*MemberlistManager) GetBroadcasts 

func (c *MemberlistManager) GetBroadcasts(overhead, limit int) [][]byte

GetBroadcasts is called when user data messages can be broadcast. It can return a list of buffers to send. Each buffer should assume an overhead as provided with a limit on the total byte size allowed. The total byte size of the resulting data to send must not exceed the limit. Care should be taken that this method does not block, since doing so would block the entire UDP packet receive loop.

func (*MemberlistManager) GetPartitions 

func (c *MemberlistManager) GetPartitions() []int32

get the partitions that this node is handling.

func (*MemberlistManager) IsPrimary 

func (c *MemberlistManager) IsPrimary() bool

Returns true if the this node is a set as a primary node that should write data to cassandra.

func (*MemberlistManager) IsReady 

func (c *MemberlistManager) IsReady() bool

Returns true if this node is a ready to accept requests from users.

func (*MemberlistManager) Join 

func (c *MemberlistManager) Join(peers []string) (int, error)

func (*MemberlistManager) LocalState 

func (c *MemberlistManager) LocalState(join bool) []byte

LocalState is used for a TCP Push/Pull. This is sent to the remote side in addition to the membership information. Any data can be sent here. See MergeRemoteState as well. The `join` boolean indicates this is for a join instead of a push/pull.

func (*MemberlistManager) MemberList 

func (c *MemberlistManager) MemberList(isReady, hasData bool) []Node

func (*MemberlistManager) MergeRemoteState 

func (c *MemberlistManager) MergeRemoteState(buf []byte, join bool)

func (*MemberlistManager) NodeMeta 

func (c *MemberlistManager) NodeMeta(limit int) []byte

NodeMeta is used to retrieve meta-data about the current node when broadcasting an alive message. It's length is limited to the given byte size. This metadata is available in the HTTPNode structure.

func (*MemberlistManager) NotifyJoin 

func (c *MemberlistManager) NotifyJoin(node *memberlist.Node)

func (*MemberlistManager) NotifyLeave 

func (c *MemberlistManager) NotifyLeave(node *memberlist.Node)

func (*MemberlistManager) NotifyMsg 

func (c *MemberlistManager) NotifyMsg(buf []byte)

NotifyMsg is called when a user-data message is received. Care should be taken that this method does not block, since doing so would block the entire UDP packet receive loop. Additionally, the byte slice may be modified after the call returns, so it should be copied if needed.

func (*MemberlistManager) NotifyUpdate 

func (c *MemberlistManager) NotifyUpdate(node *memberlist.Node)

func (*MemberlistManager) SetPartitions 

func (c *MemberlistManager) SetPartitions(part []int32)

set the partitions that this node is handling.

func (*MemberlistManager) SetPrimary 

func (c *MemberlistManager) SetPrimary(primary bool)

SetPrimary sets the primary status of this node

func (*MemberlistManager) SetPriority 

func (c *MemberlistManager) SetPriority(prio int)

set the priority of this node. lower values == higher priority

func (*MemberlistManager) SetReady 

func (c *MemberlistManager) SetReady()

mark this node as ready to accept requests from users.

func (*MemberlistManager) SetState 

func (c *MemberlistManager) SetState(state NodeState)

Set the state of this node.

func (*MemberlistManager) Start 

func (c *MemberlistManager) Start()

func (*MemberlistManager) Stop 

func (c *MemberlistManager) Stop()

func (*MemberlistManager) ThisNode 

func (c *MemberlistManager) ThisNode() Node

type MockClusterManager 

type MockClusterManager struct {
	Peers []*MockNode
	// contains filtered or unexported fields
}

func InitMock 

func InitMock() *MockClusterManager

func (*MockClusterManager) GetPartitions 

func (c *MockClusterManager) GetPartitions() []int32

func (*MockClusterManager) IsPrimary 

func (c *MockClusterManager) IsPrimary() bool

func (*MockClusterManager) IsReady 

func (c *MockClusterManager) IsReady() bool

func (*MockClusterManager) Join 

func (c *MockClusterManager) Join(peers []string) (int, error)

func (*MockClusterManager) MemberList 

func (c *MockClusterManager) MemberList(isReady, hasData bool) []Node

func (*MockClusterManager) SetPartitions 

func (c *MockClusterManager) SetPartitions(partitions []int32)

func (*MockClusterManager) SetPrimary 

func (c *MockClusterManager) SetPrimary(primary bool)

func (*MockClusterManager) SetPriority 

func (c *MockClusterManager) SetPriority(prio int)

func (*MockClusterManager) SetReady 

func (c *MockClusterManager) SetReady()

func (*MockClusterManager) SetReadyIn 

func (c *MockClusterManager) SetReadyIn(t time.Duration)

func (*MockClusterManager) SetState 

func (c *MockClusterManager) SetState(NodeState)

func (*MockClusterManager) Start 

func (c *MockClusterManager) Start()

func (*MockClusterManager) Stop 

func (c *MockClusterManager) Stop()

func (*MockClusterManager) ThisNode 

func (c *MockClusterManager) ThisNode() Node

type MockNode 

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

func NewMockNode 

func NewMockNode(isLocal bool, name string, partitions []int32, postResponse []byte) *MockNode

func (*MockNode) GetName 

func (n *MockNode) GetName() string

func (*MockNode) GetPartitions 

func (n *MockNode) GetPartitions() []int32

func (*MockNode) GetPriority 

func (n *MockNode) GetPriority() int

func (*MockNode) HasData added in v0.12.0 

func (n *MockNode) HasData() bool

func (*MockNode) IsLocal 

func (n *MockNode) IsLocal() bool

func (*MockNode) IsReady 

func (n *MockNode) IsReady() bool

func (MockNode) Post 

func (n MockNode) Post(ctx context.Context, name, path string, body Traceable) ([]byte, error)

type Node 

type Node interface {
	IsLocal() bool
	IsReady() bool
	GetPartitions() []int32
	GetPriority() int
	HasData() bool
	Post(context.Context, string, string, Traceable) ([]byte, error)
	GetName() string
}

func MembersForQuery 

func MembersForQuery() ([]Node, error)

MembersForQuery returns the list of nodes to broadcast requests to If partitions are assigned to nodes in groups (a[0,1], b[0,1], c[2,3], d[2,3] as opposed to a[0,1], b[0,2], c[1,3], d[2,3]), only 1 member per partition is returned. The nodes are selected based on priority, preferring thisNode if it has the lowest prio, otherwise using a random selection from all nodes with the lowest prio.

type NodeMode added in v0.12.0 

type NodeMode uint8
const (
	ModeShard NodeMode = iota
	ModeDev
	ModeQuery
)

func NodeModeFromString added in v0.12.0 

func NodeModeFromString(mode string) (NodeMode, error)

capitalized form is what stringer (.String()) generates and is used for json serialization

func (NodeMode) MarshalJSON added in v0.12.0 

func (n NodeMode) MarshalJSON() ([]byte, error)

MarshalJSON marshals a NodeMode

func (NodeMode) String added in v0.12.0 

func (i NodeMode) String() string

func (*NodeMode) UnmarshalJSON added in v0.12.0 

func (n *NodeMode) UnmarshalJSON(b []byte) error

UnmarshalJSON unmashals a NodeMode

type NodeState 

type NodeState int
const (
	NodeNotReady NodeState = iota
	NodeReady
	NodeUnreachable
)

func NodeStateFromString 

func NodeStateFromString(s string) NodeState

func (NodeState) MarshalJSON 

func (n NodeState) MarshalJSON() ([]byte, error)

func (NodeState) String 

func (i NodeState) String() string

func (*NodeState) UnmarshalJSON 

func (n *NodeState) UnmarshalJSON(data []byte) error

UnmarshalJSON supports unmarshalling according to the older integer based, as well as the new string based, representation

type SingleNodeManager 

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

func NewSingleNodeManager 

func NewSingleNodeManager(thisNode HTTPNode) *SingleNodeManager

func (*SingleNodeManager) GetPartitions 

func (m *SingleNodeManager) GetPartitions() []int32

get the partitions that this node is handling.

func (*SingleNodeManager) IsPrimary 

func (m *SingleNodeManager) IsPrimary() bool

func (*SingleNodeManager) IsReady 

func (m *SingleNodeManager) IsReady() bool

func (*SingleNodeManager) Join 

func (m *SingleNodeManager) Join(peers []string) (int, error)

func (*SingleNodeManager) MemberList 

func (m *SingleNodeManager) MemberList(isReady, hasData bool) []Node

func (*SingleNodeManager) SetPartitions 

func (m *SingleNodeManager) SetPartitions(part []int32)

set the partitions that this node is handling.

func (*SingleNodeManager) SetPrimary 

func (m *SingleNodeManager) SetPrimary(primary bool)

func (*SingleNodeManager) SetPriority 

func (m *SingleNodeManager) SetPriority(prio int)

set the priority of this node. lower values == higher priority

func (*SingleNodeManager) SetReady 

func (m *SingleNodeManager) SetReady()

func (*SingleNodeManager) SetState 

func (m *SingleNodeManager) SetState(state NodeState)

func (*SingleNodeManager) Start 

func (m *SingleNodeManager) Start()

func (*SingleNodeManager) Stop 

func (m *SingleNodeManager) Stop()

func (*SingleNodeManager) ThisNode 

func (m *SingleNodeManager) ThisNode() Node

type Traceable 

type Traceable interface {
	Trace(span opentracing.Span)
	TraceDebug(span opentracing.Span)
}

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