stats

Documentation

Index

• Constants
• Variables
• type ContainerMetadata
• type ContainerStats
• type DockerContainerMetadataResolver
  • func (resolver *DockerContainerMetadataResolver) ResolveContainer(dockerID string) (*api.DockerContainer, error)
  • func (resolver *DockerContainerMetadataResolver) ResolveTask(dockerID string) (*api.Task, error)
• type DockerStatsEngine
  • func NewDockerStatsEngine(cfg *config.Config, client dockerapi.DockerClient, ...) *DockerStatsEngine
  • func (engine *DockerStatsEngine) ContainerDockerStats(taskARN string, containerID string) (*docker.Stats, error)
  • func (engine *DockerStatsEngine) Disable()
  • func (engine *DockerStatsEngine) GetInstanceMetrics() (*ecstcs.MetricsMetadata, []*ecstcs.TaskMetric, error)
  • func (engine *DockerStatsEngine) GetTaskHealthMetrics() (*ecstcs.HealthMetadata, []*ecstcs.TaskHealth, error)
  • func (engine *DockerStatsEngine) MustInit(ctx context.Context, taskEngine ecsengine.TaskEngine, cluster string, ...) error
  • func (engine *DockerStatsEngine) Shutdown()
• type Engine
• type Queue
  • func NewQueue(maxSize int) *Queue
  • func (queue *Queue) Add(dockerStat *docker.Stats) error
  • func (queue *Queue) GetCPUStatsSet() (*ecstcs.CWStatsSet, error)
  • func (queue *Queue) GetLastStat() *docker.Stats
  • func (queue *Queue) GetMemoryStatsSet() (*ecstcs.CWStatsSet, error)
  • func (queue *Queue) GetRawUsageStats(numStats int) ([]UsageStats, error)
  • func (queue *Queue) Reset()
• type StatsContainer
  • func (container *StatsContainer) StartStatsCollection()
  • func (container *StatsContainer) StopStatsCollection()
• type UsageStats

Constants

const (
	// SleepBetweenUsageDataCollection is the sleep duration between collecting usage data for a container.
	SleepBetweenUsageDataCollection = 1 * time.Second

	// ContainerStatsBufferLength is the number of usage metrics stored in memory for a container. It is calculated as
	// Number of usage metrics gathered in a second (1) * 60 * Time duration in minutes to store the data for (2)
	ContainerStatsBufferLength = 120
)

const (
	// BytesInMiB is the number of bytes in a MebiByte.
	BytesInMiB = 1024 * 1024
)

Variables

var (
	// EmptyMetricsError indicates an error for a task when there are no container
	// metrics to report
	EmptyMetricsError = errors.New("stats engine: no task metrics to report")
	// EmptyHealthMetricsError indicates an error for a task when there are no container
	// health metrics to report
	EmptyHealthMetricsError = errors.New("stats engine: no task health metrics to report")
)

Types

type ContainerMetadata

type ContainerMetadata struct {
	DockerID string `json:"-"`
}

ContainerMetadata contains meta-data information for a container.

type ContainerStats

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

ContainerStats encapsulates the raw CPU and memory utilization from cgroup fs.

type DockerContainerMetadataResolver

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

DockerContainerMetadataResolver implements ContainerMetadataResolver for DockerTaskEngine.

func (*DockerContainerMetadataResolver) ResolveContainer

func (resolver *DockerContainerMetadataResolver) ResolveContainer(dockerID string) (*api.DockerContainer, error)

ResolveContainer resolves the api container object, given container id.

func (*DockerContainerMetadataResolver) ResolveTask

func (resolver *DockerContainerMetadataResolver) ResolveTask(dockerID string) (*api.Task, error)

ResolveTask resolves the api task object, given container id.

type DockerStatsEngine

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

DockerStatsEngine is used to monitor docker container events and to report utlization metrics of the same.

func NewDockerStatsEngine

func NewDockerStatsEngine(cfg *config.Config, client dockerapi.DockerClient, containerChangeEventStream *eventstream.EventStream) *DockerStatsEngine

NewDockerStatsEngine creates a new instance of the DockerStatsEngine object. MustInit() must be called to initialize the fields of the new event listener.

func (*DockerStatsEngine) ContainerDockerStats

func (engine *DockerStatsEngine) ContainerDockerStats(taskARN string, containerID string) (*docker.Stats, error)

ContainerDockerStats returns the last stored raw docker stats object for a container

func (*DockerStatsEngine) Disable

func (engine *DockerStatsEngine) Disable()

Disable prevents this engine from managing any additional tasks.

func (*DockerStatsEngine) GetInstanceMetrics

func (engine *DockerStatsEngine) GetInstanceMetrics() (*ecstcs.MetricsMetadata, []*ecstcs.TaskMetric, error)

GetInstanceMetrics gets all task metrics and instance metadata from stats engine.

func (*DockerStatsEngine) GetTaskHealthMetrics

func (engine *DockerStatsEngine) GetTaskHealthMetrics() (*ecstcs.HealthMetadata, []*ecstcs.TaskHealth, error)

GetTaskHealthMetrics returns the container health metrics

func (*DockerStatsEngine) MustInit

func (engine *DockerStatsEngine) MustInit(ctx context.Context, taskEngine ecsengine.TaskEngine, cluster string, containerInstanceArn string) error

MustInit initializes fields of the DockerStatsEngine object.

func (*DockerStatsEngine) Shutdown

func (engine *DockerStatsEngine) Shutdown()

Shutdown cleans up the resources after the statas engine.

type Engine

type Engine interface {
	GetInstanceMetrics() (*ecstcs.MetricsMetadata, []*ecstcs.TaskMetric, error)
	ContainerDockerStats(taskARN string, containerID string) (*docker.Stats, error)
	GetTaskHealthMetrics() (*ecstcs.HealthMetadata, []*ecstcs.TaskHealth, error)
}

Engine defines methods to be implemented by the engine struct. It is defined to make testing easier.

type Queue

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

Queue abstracts a queue using UsageStats slice.

func NewQueue

func NewQueue(maxSize int) *Queue

NewQueue creates a queue.

func (*Queue) Add

func (queue *Queue) Add(dockerStat *docker.Stats) error

Add adds a new set of container stats to the queue.

func (*Queue) GetCPUStatsSet

func (queue *Queue) GetCPUStatsSet() (*ecstcs.CWStatsSet, error)

GetCPUStatsSet gets the stats set for CPU utilization.

func (*Queue) GetLastStat

func (queue *Queue) GetLastStat() *docker.Stats

GetLastStat returns the last recorded raw statistics object from docker

func (*Queue) GetMemoryStatsSet

func (queue *Queue) GetMemoryStatsSet() (*ecstcs.CWStatsSet, error)

GetMemoryStatsSet gets the stats set for memory utilization.

func (*Queue) GetRawUsageStats

func (queue *Queue) GetRawUsageStats(numStats int) ([]UsageStats, error)

GetRawUsageStats gets the array of most recent raw UsageStats, in descending order of timestamps.

func (*Queue) Reset

func (queue *Queue) Reset()

Reset resets the stats queue.

type StatsContainer

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

StatsContainer abstracts methods to gather and aggregate utilization data for a container.

func (*StatsContainer) StartStatsCollection

func (container *StatsContainer) StartStatsCollection()

func (*StatsContainer) StopStatsCollection

func (container *StatsContainer) StopStatsCollection()

type UsageStats

type UsageStats struct {
	CPUUsagePerc      float32   `json:"cpuUsagePerc"`
	MemoryUsageInMegs uint32    `json:"memoryUsageInMegs"`
	Timestamp         time.Time `json:"timestamp"`
	// contains filtered or unexported fields
}

UsageStats abstracts the format in which the queue stores data.