const (
	// DockerOperationsKey is the key for docker operation metrics.
	DockerOperationsKey = "docker_operations_total"
	// DockerOperationsLatencyKey is the key for the operation latency metrics.
	DockerOperationsLatencyKey = "docker_operations_duration_seconds"
	// DockerOperationsErrorsKey is the key for the operation error metrics.
	DockerOperationsErrorsKey = "docker_operations_errors_total"
	// DockerOperationsTimeoutKey is the key for the operation timeout metrics.
	DockerOperationsTimeoutKey = "docker_operations_timeout_total"
)

var (
	// DockerOperationsLatency collects operation latency numbers by operation
	// type.
	DockerOperationsLatency = metrics.NewHistogramVec(
		&metrics.HistogramOpts{
			Subsystem:      kubeletSubsystem,
			Name:           DockerOperationsLatencyKey,
			Help:           "Latency in seconds of Docker operations. Broken down by operation type.",
			Buckets:        metrics.DefBuckets,
			StabilityLevel: metrics.ALPHA,
		},
		[]string{"operation_type"},
	)
	// DockerOperations collects operation counts by operation type.
	DockerOperations = metrics.NewCounterVec(
		&metrics.CounterOpts{
			Subsystem:      kubeletSubsystem,
			Name:           DockerOperationsKey,
			Help:           "Cumulative number of Docker operations by operation type.",
			StabilityLevel: metrics.ALPHA,
		},
		[]string{"operation_type"},
	)
	// DockerOperationsErrors collects operation errors by operation
	// type.
	DockerOperationsErrors = metrics.NewCounterVec(
		&metrics.CounterOpts{
			Subsystem:      kubeletSubsystem,
			Name:           DockerOperationsErrorsKey,
			Help:           "Cumulative number of Docker operation errors by operation type.",
			StabilityLevel: metrics.ALPHA,
		},
		[]string{"operation_type"},
	)
	// DockerOperationsTimeout collects operation timeouts by operation type.
	DockerOperationsTimeout = metrics.NewCounterVec(
		&metrics.CounterOpts{
			Subsystem:      kubeletSubsystem,
			Name:           DockerOperationsTimeoutKey,
			Help:           "Cumulative number of Docker operation timeout by operation type.",
			StabilityLevel: metrics.ALPHA,
		},
		[]string{"operation_type"},
	)
)