core

package
v2.1.17+incompatible Latest Latest
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 Go to latest Published: Nov 10, 2018 License: Apache-2.0 Imports: 15 Imported by: 24

Documentation

Index

Constants

View Source 
const (
	EmptyScore    int   = 0x7FFFFFFFFFFFFFFF
	BaseScore     int   = 10000
	EmptyCapacity int64 = -1
	MaxCapacity   int64 = 0x7FFFFFFFFFFFFFFF
)
View Source 
const (
	NoResourceAvailableMsg = "No resource are avaliable that match all of the following predicates:"
)
View Source 
const (
	PriorityStep int = 100
)

Variables

View Source 
var (
	EmptyScores     = make(map[string]int)
	EmptyCapacities = make(map[string]Counter)
)

Functions

func GetCapacities 

func GetCapacities(u *Unit, id string) (res map[string]int64)

func GetScore 

func GetScore(u *Unit, id string, details bool) string

func ReservedSub 

func ReservedSub(key string, value value_t, reserved value_t) value_t

func XGetCalculator 

func XGetCalculator(c Candidater, key string, kind Kind) value_t

Types

type Candidater 

type Candidater interface {
	// IndexKey return candidate cache item's ident, usually host ID
	IndexKey() string
	// Get return candidate cache item's value by key
	Get(key string) interface{}
	// XGet return candidate cache item's value by key and kind
	XGet(key string, kind Kind) interface{}
	Type() int

	GetAggregates() []*models.Aggregate
	GetHostAggregates() []*models.Aggregate
}

Candidater replace host Candidate resource info

type Capacity 

type Capacity struct {
	Values   map[string]Counter
	MinValue int64
}

type Counter 

type Counter interface {
	GetCount() int64
}

type CounterManager 

type CounterManager struct {
	Counters map[string]Counter
	// contains filtered or unexported fields
}

func NewCounterManager 

func NewCounterManager() *CounterManager

func (*CounterManager) Get 

func (m *CounterManager) Get(key string) Counter

func (*CounterManager) GetOrCreate 

func (m *CounterManager) GetOrCreate(key string, creator func() Counter) Counter

type Counters 

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

func NewCounters 

func NewCounters() *Counters

func (*Counters) Add 

func (c *Counters) Add(cnt Counter)

func (*Counters) GetCount 

func (c *Counters) GetCount() int64

type DefaultResAlgorithm 

type DefaultResAlgorithm struct{}

func (*DefaultResAlgorithm) Sub 

func (al *DefaultResAlgorithm) Sub(sum value_t, reserved value_t) value_t

func (*DefaultResAlgorithm) Sum 

func (al *DefaultResAlgorithm) Sum(values []value_t) value_t

type FailedCandidate 

type FailedCandidate struct {
	Stage     string
	Candidate Candidater
	Reasons   []PredicateFailureReason
}

type FailedCandidates 

type FailedCandidates struct {
	Candidates []FailedCandidate
}

type FailedPredicateMap 

type FailedPredicateMap map[string][]PredicateFailureReason

type FitError 

type FitError struct {
	Unit               *Unit
	FailedCandidateMap map[string]*FailedCandidates
}

func (*FitError) Error 

func (fe *FitError) Error() string

Error returns detailed information of why the guest failed to fit on each host

type FitPredicate 

type FitPredicate interface {
	// Get filter's name
	Name() string
	Clone() FitPredicate
	PreExecute(*Unit, []Candidater) (bool, error)
	Execute(*Unit, Candidater) (bool, []PredicateFailureReason, error)
}

type GenericScheduler 

type GenericScheduler struct {
	Scheduler
	// contains filtered or unexported fields
}

func NewGenericScheduler 

func NewGenericScheduler(s Scheduler) (*GenericScheduler, error)

func (*GenericScheduler) Schedule 

func (g *GenericScheduler) Schedule(unit *Unit, candidates []Candidater) ([]*SchedResultItem, error)

type HostPriority 

type HostPriority struct {
	// Name of the host
	Host string
	// Score associated with the host
	Score int
	// Resource wraps Candidate host info
	Candidate Candidater
}

HostPriority represents the priority of scheduling to particular host, higher priority is better.

func EqualPriority 

func EqualPriority(_ *Unit, candidate Candidater) (HostPriority, error)

EqualPriority is a prioritizer function that gives an equal weight of one to all candidates

type HostPriorityList 

type HostPriorityList []HostPriority

func PrioritizeCandidates 

func PrioritizeCandidates(
	unit *Unit,
	candidates []Candidater,
	priorities []PriorityConfig,
) (HostPriorityList, error)

PrioritizeCandidates by running the individual priority functions in parallel. Each priority function is expected to set a score of 0-10 0 is the lowest priority score (least preffered node) and 10 is the highest / Each priority function can also have its own weight The resource scores returned by priority function are multiplied by the weights to get weighted scores All scores are finally combined (added) to get the total weighted scores of all resources

func (HostPriorityList) Len 

func (h HostPriorityList) Len() int

func (HostPriorityList) Less 

func (h HostPriorityList) Less(i, j int) bool

func (HostPriorityList) Swap 

func (h HostPriorityList) Swap(i, j int)

type Kind 

type Kind int
const (
	KindFree Kind = iota
	KindRaw
	KindReserved
)

type MinCounters 

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

func NewMinCounters 

func NewMinCounters() *MinCounters

func (*MinCounters) Add 

func (c *MinCounters) Add(counter Counter)

func (*MinCounters) GetCount 

func (c *MinCounters) GetCount() int64

type MultiCounter 

type MultiCounter interface {
	Counter
	Add(counter Counter)
}

type NoResourceError 

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

func (*NoResourceError) Error 

func (e *NoResourceError) Error() string

type NormalCounter 

type NormalCounter struct {
	Value int64
}

func NewNormalCounter 

func NewNormalCounter(value int64) *NormalCounter

func (*NormalCounter) GetCount 

func (c *NormalCounter) GetCount() int64

type PredicateFailureReason 

type PredicateFailureReason interface {
	GetReason() string
}

type Priority 

type Priority interface {
	Name() string
	Clone() Priority
	Map(*Unit, Candidater) (HostPriority, error)
	Reduce(*Unit, []Candidater, HostPriorityList) error
	PreExecute(*Unit, []Candidater) (bool, []PredicateFailureReason, error)
}

type PriorityConfig 

type PriorityConfig struct {
	Name   string
	Pre    PriorityPreFunction
	Map    PriorityMapFunction
	Reduce PriorityReduceFunction
	Weight int
}

type PriorityMapFunction 

type PriorityMapFunction func(*Unit, Candidater) (HostPriority, error)

PriorityMapFunction is a function that computes per-resource results for a given resource.

type PriorityPreFunction 

type PriorityPreFunction func(*Unit, []Candidater) (bool, []PredicateFailureReason, error)

type PriorityReduceFunction 

type PriorityReduceFunction func(*Unit, []Candidater, HostPriorityList) error

PriorityReduceFunction is a function that aggregated per-resource results and computes final scores for all hosts.

type ResourceAlgorithm 

type ResourceAlgorithm interface {
	Sum(values []value_t) value_t
	Sub(sum value_t, reserved value_t) value_t
}

func GetResourceAlgorithm 

func GetResourceAlgorithm(res_name string) ResourceAlgorithm

type SchedContextDataItem 

type SchedContextDataItem struct {
	Networks sync.Map
	Data     map[string]interface{}
}

type SchedLog 

type SchedLog struct {
	Candidate string
	Action    string
	Message   string
}

func NewSchedLog 

func NewSchedLog(candidate, action, message string) SchedLog

func (*SchedLog) String 

func (log *SchedLog) String() string

type SchedLogList 

type SchedLogList []SchedLog

func (SchedLogList) Len 

func (logList SchedLogList) Len() int

func (SchedLogList) Less 

func (logList SchedLogList) Less(i, j int) bool

func (SchedLogList) Swap 

func (logList SchedLogList) Swap(i, j int)

type SchedLogManager 

type SchedLogManager struct {
	Logs SchedLogList
	// contains filtered or unexported fields
}

func NewSchedLogManager 

func NewSchedLogManager() *SchedLogManager

func (*SchedLogManager) Append 

func (m *SchedLogManager) Append(candidate, action, message string)

func (*SchedLogManager) Appends 

func (m *SchedLogManager) Appends(logs []SchedLog)

func (*SchedLogManager) Read 

func (m *SchedLogManager) Read() []string

type SchedResultItem 

type SchedResultItem struct {
	ID       string                 `json:"id"`
	Name     string                 `json:"name"`
	Count    int64                  `json:"count"`
	Data     map[string]interface{} `json:"data"`
	Capacity int64                  `json:"capacity"`
	Score    int                    `json:"score"`

	CapacityDetails map[string]int64 `json:"capacity_details"`
	ScoreDetails    map[string]int   `json:"score_details"`
}

type SchedResultItemList 

type SchedResultItemList struct {
	Unit *Unit
	Data []*SchedResultItem
}

func (SchedResultItemList) Len 

func (its SchedResultItemList) Len() int

func (SchedResultItemList) Less 

func (its SchedResultItemList) Less(i, j int) bool

type Scheduler 

type Scheduler interface {
	BeforePredicate() error
	Predicates() (map[string]FitPredicate, error)
	PriorityConfigs() ([]PriorityConfig, error)

	// mark already selected candidates dirty that
	// can't be use again until cleanup them
	DirtySelectedCandidates([]*SelectedCandidate)
}

type Score 

type Score struct {
	Values map[string]int
	Sum    int
}

type SelectPlugin 

type SelectPlugin interface {
	OnSelect(*Unit, Candidater) bool
	OnSelectEnd(u *Unit, c Candidater, count int64)
}

type SelectedCandidate 

type SelectedCandidate struct {
	Count     int64
	Candidate Candidater
}

func SelectHosts 

func SelectHosts(unit *Unit, priorityList HostPriorityList) ([]*SelectedCandidate, error)

SelectHosts takes a prioritized list of candidates and then picks a group of hosts

func (SelectedCandidate) Index 

func (s SelectedCandidate) Index() (string, error)

type SharedResourceManager 

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

func NewSharedResourceManager 

func NewSharedResourceManager() *SharedResourceManager

func (*SharedResourceManager) Add 

func (m *SharedResourceManager) Add(resourceKey string, capacity Counter)

type Unit 

type Unit struct {
	SchedInfo             *api.SchedInfo
	CapacityMap           map[string]*Capacity
	ScoreMap              map[string]Score
	DataMap               map[string]*SchedContextDataItem
	SharedResourceManager *SharedResourceManager
	CounterManager        *CounterManager

	FailedCandidateMap map[string]*FailedCandidates

	SchedulerManager interface{}

	LogManager *SchedLogManager
	// contains filtered or unexported fields
}

Unit wraps sched input info and other log and record manager

func NewScheduleUnit 

func NewScheduleUnit(info *api.SchedInfo, schedManager interface{}) *Unit

func (*Unit) AllSelectPlugins 

func (u *Unit) AllSelectPlugins() []SelectPlugin

func (*Unit) AppendFailedCandidates 

func (u *Unit) AppendFailedCandidates(fcs []FailedCandidate)

func (*Unit) AppendSelectPlugin 

func (u *Unit) AppendSelectPlugin(p SelectPlugin)

func (*Unit) GetCapacities 

func (u *Unit) GetCapacities(id string) map[string]Counter

func (*Unit) GetCapacity 

func (u *Unit) GetCapacity(id string) int64

func (*Unit) GetCapacityOfName 

func (u *Unit) GetCapacityOfName(id string, name string) int64

func (*Unit) GetFiltedData 

func (u *Unit) GetFiltedData(id string, count int64) map[string]interface{}

func (*Unit) GetScore 

func (u *Unit) GetScore(id string) int

func (*Unit) GetScores 

func (u *Unit) GetScores(id string) map[string]int

func (*Unit) IncreaseScore 

func (u *Unit) IncreaseScore(id string, name string, increase int) error

func (*Unit) Info 

func (u *Unit) Info() string

func (*Unit) IsPublicCloudProvider 

func (u *Unit) IsPublicCloudProvider() bool

func (*Unit) SchedData 

func (u *Unit) SchedData() *api.SchedData

func (*Unit) SessionID 

func (u *Unit) SessionID() string

func (*Unit) SetCapacity 

func (u *Unit) SetCapacity(id string, name string, capacity Counter) error

func (*Unit) SetFiltedData 

func (u *Unit) SetFiltedData(id string, name string, data interface{}) error

func (*Unit) SetScore 

func (u *Unit) SetScore(id, name string, score int) error

func (*Unit) SkipDirtyMarkHost 

func (u *Unit) SkipDirtyMarkHost() bool

type WaitGroupWrapper 

type WaitGroupWrapper struct {
	sync.WaitGroup
}

func (*WaitGroupWrapper) Wrap 

func (w *WaitGroupWrapper) Wrap(cb func())

Source Files

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