Class FailoverGeoZonesConstraint

java.lang.Object

com.eqixiac.equinix.design.resilience.FailoverGeoZonesConstraint

All Implemented Interfaces:

Constraint

public final class FailoverGeoZonesConstraint
extends Object
implements Constraint

"geo_zones_failover": data sovereignty that holds through failover. Every path the design actually uses (the metro a workload runs in, the metros its sites' traffic crosses, the metros its cloud traffic crosses) must lie inside the spec's constraints.geoZones, at baseline and after every single-element failure: a standby path that leaves the zones is a violation even when the primary path stays inside. Zone membership is the catalogue's geoScopes/geoZones for each metro, as the built-in geo_zones constraint reads them.

Inert when the spec states no geo zones. In a Metro Optimizer run the built-in geo_zones constraint already keeps every portfolio metro inside the zones, so this check can only add findings for paths outside the portfolio; its main use is on a portfolio analysed as given (ResilienceAnalyzer.portfolio(MetroPortfolio)), where it names the scenario that leaves the zone.

Field Summary

Fields

Modifier and Type	Field	Description
static final String	ID	The constraint id.

Constructor Summary

Constructors

Constructor	Description
FailoverGeoZonesConstraint()	With the default options.
FailoverGeoZonesConstraint(ResilienceOptions options)

Method Summary

Modifier and Type	Method	Description
ConstraintVerdict	check(MetroPortfolio portfolio, DesignContext context)	Checks a whole portfolio.
String	id()

Methods inherited from class Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface Constraint

admits, usesCost

Modifier and Type	Method	Description
default boolean	admits(MetroFacts metro, DesignContext context)	Cheap per-metro pruning before portfolios are formed.
default boolean	usesCost()	Whether Constraint.check(MetroPortfolio, DesignContext) prices the portfolio through DesignContext.costModel().

Field Details

ID

public static final String ID

The constraint id.

See Also:

• Constant Field Values

Constructor Details

FailoverGeoZonesConstraint

public FailoverGeoZonesConstraint()

With the default options.

FailoverGeoZonesConstraint

public FailoverGeoZonesConstraint(ResilienceOptions options)

Parameters:

options - graph and simulation options

Method Details

id

public String id()

Specified by:

id in interface Constraint

Returns:

a stable id, lower_snake_case (for example max_latency)

check

public ConstraintVerdict check(MetroPortfolio portfolio,
 DesignContext context)

Description copied from interface: Constraint

Checks a whole portfolio.

Specified by:

check in interface Constraint

Parameters:

portfolio - the candidate design

context - the facts of this run

Returns:

the verdict with its reason