fleettracker

var (
	// InstanceIDFlag is the instance ID of the fleettracker. Note: This is a
	// different instance ID than leverutil.InstanceIDFlag because they serve
	// different things.
	InstanceIDFlag = config.DeclareString(
		PackageName, "instanceID", leverutil.RandomID())
	// TTLFlag is the time after a service expires in fleettracker. If no RPC
	// event comes up during this span of time for a Lever service, fleettracker
	// stops keeping track of its stats (it is assumed all its instances
	// have expired anyway).
	TTLFlag = config.DeclareDuration(PackageName, "ttl", 20*time.Minute)
)

var (
	// TickNumEventsFlag is the number of events that the load tracker aims to
	// put in a tick length. Yet, due to {Min,Max}TickPeriodFlag, the number of
	// events may vary.
	TickNumEventsFlag = config.DeclareInt(PackageName, "tickNumEvents", 16)
	// MinTickPeriodFlag is the minimum time between load tracker ticks.
	MinTickPeriodFlag = config.DeclareDuration(
		PackageName, "minTickPeriod", 250*time.Millisecond)
	// MaxTickPeriodFlag is the maximum time between load tracker
	// ticks. Note: The period may still be longer than this if no events at all
	// come up for a while.
	MaxTickPeriodFlag = config.DeclareDuration(
		PackageName, "maxTickPeriod", 15*time.Second)
	// StatsExpPeriodFlag is the amount of time stats are taken into
	// consideration. This value is used for the computation of alpha in EWMA.
	StatsExpPeriodFlag = config.DeclareDuration(
		PackageName, "statsExpPeriod", 15*time.Second)
	// ScaleDownAfterFlag is the amount of time to delay scaling down (just
	// in case resource requirements pop back up).
	ScaleDownAfterFlag = config.DeclareDuration(
		PackageName, "scaleDownAfter", 45*time.Second)
	// ChangesExpectedAfterFlag is the maxium amount of time a change in number
	// of instances is expected to be reflected in Consul. (Otherwise
	// it is assumed there have been other changes outside of this
	// library's control).
	ChangesExpectedAfterFlag = config.DeclareDuration(
		PackageName, "changesExpectedAfter", 45*time.Second)
	// MaxDeltaFlag represents the maximum number of instances that may be
	// added at a time (per tick).
	MaxDeltaFlag = config.DeclareInt(PackageName, "maxDelta", 10)
)