datasource

Documentation

Index

• type Label
• type Metric
  • func (m *Metric) AddLabel(key, value string)
  • func (m *Metric) Label(key string) string
  • func (m *Metric) SetLabel(key, value string)
• type Querier
  • func Init() (Querier, error)
• type VMStorage
  • func NewVMStorage(baseURL, basicAuthUser, basicAuthPass string, lookBack time.Duration, ...) *VMStorage
  • func (s *VMStorage) Query(ctx context.Context, query string) ([]Metric, error)

Types

type Label

type Label struct {
	Name  string
	Value string
}

Label represents metric's label

type Metric

type Metric struct {
	Labels    []Label
	Timestamp int64
	Value     float64
}

Metric is the basic entity which should be return by datasource It represents single data point with full list of labels

func (*Metric) AddLabel

func (m *Metric) AddLabel(key, value string)

AddLabel appends the given label to the label set

func (*Metric) Label

func (m *Metric) Label(key string) string

Label returns the given label value. If label is missing empty string will be returned

func (*Metric) SetLabel

func (m *Metric) SetLabel(key, value string)

SetLabel adds or updates existing one label by the given key and label

type Querier

type Querier interface {
	Query(ctx context.Context, query string) ([]Metric, error)
}

Querier interface wraps Query method which executes given query and returns list of Metrics as result

func Init

func Init() (Querier, error)

Init creates a Querier from provided flag values.

type VMStorage

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

VMStorage represents vmstorage entity with ability to read and write metrics

func NewVMStorage

func NewVMStorage(baseURL, basicAuthUser, basicAuthPass string, lookBack time.Duration, c *http.Client) *VMStorage

NewVMStorage is a constructor for VMStorage

func (*VMStorage) Query

func (s *VMStorage) Query(ctx context.Context, query string) ([]Metric, error)

Query reads metrics from datasource by given query