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refactor: refactor Gateway API's route parent status update code
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,156 @@ | ||
| package gateway | ||
|
|
||
| import ( | ||
| "context" | ||
|
|
||
| metav1 "k8s.io/apimachinery/pkg/apis/meta/v1" | ||
| "sigs.k8s.io/controller-runtime/pkg/client" | ||
| gatewayv1 "sigs.k8s.io/gateway-api/apis/v1" | ||
|
|
||
| "github.com/kong/kubernetes-ingress-controller/v3/internal/gatewayapi" | ||
| "github.com/samber/lo" | ||
| ) | ||
|
|
||
| func newCondition( | ||
| typ string, | ||
| status metav1.ConditionStatus, | ||
| reason string, | ||
| generation int64, | ||
| ) metav1.Condition { | ||
| return metav1.Condition{ | ||
| Type: typ, | ||
| Status: status, | ||
| Reason: reason, | ||
| ObservedGeneration: generation, | ||
| LastTransitionTime: metav1.Now(), | ||
| } | ||
| } | ||
|
|
||
| func newProgrammedConditionUnknown(obj interface{ GetGeneration() int64 }) metav1.Condition { | ||
| return newCondition( | ||
| ConditionTypeProgrammed, | ||
| metav1.ConditionUnknown, | ||
| string(ConditionReasonProgrammedUnknown), | ||
| obj.GetGeneration(), | ||
| ) | ||
| } | ||
|
|
||
| // sameCondition returns true if the conditions in parameter has the same type, status, reason and message. | ||
| func sameCondition(a, b metav1.Condition) bool { | ||
| return a.Type == b.Type && | ||
| a.Status == b.Status && | ||
| a.Reason == b.Reason && | ||
| a.Message == b.Message && | ||
| a.ObservedGeneration == b.ObservedGeneration | ||
| } | ||
|
|
||
| func setRouteParentStatusCondition(parentStatus *gatewayapi.RouteParentStatus, newCondition metav1.Condition) bool { | ||
| var conditionFound, changed bool | ||
| for i, condition := range parentStatus.Conditions { | ||
| if condition.Type == newCondition.Type { | ||
| conditionFound = true | ||
| if !sameCondition(condition, newCondition) { | ||
| parentStatus.Conditions[i] = newCondition | ||
| changed = true | ||
| } | ||
| } | ||
| } | ||
|
|
||
| if !conditionFound { | ||
| parentStatus.Conditions = append(parentStatus.Conditions, newCondition) | ||
| changed = true | ||
| } | ||
| return changed | ||
| } | ||
|
|
||
| func parentStatusHasProgrammedCondition(parentStatus *gatewayapi.RouteParentStatus) bool { | ||
| for _, condition := range parentStatus.Conditions { | ||
| if condition.Type == ConditionTypeProgrammed { | ||
| return true | ||
| } | ||
| } | ||
| return false | ||
| } | ||
|
|
||
| // ensureParentsProgrammedCondition ensures that provided route's parent statuses | ||
| // have Programmed condition set properly. It returns a boolean flag indicating | ||
| // whether an update to the provided route has been performed. | ||
| // | ||
| // Use the condition argument to specify the Reason, Status and Message. | ||
| // Type will be set to Programmed whereas ObservedGeneration and LastTransitionTime | ||
| // will be set accordingly based on the route's generation and current time. | ||
| func ensureParentsProgrammedCondition[ | ||
| routeT gatewayapi.RouteT, | ||
| ]( | ||
| ctx context.Context, | ||
| client client.SubResourceWriter, | ||
| route routeT, | ||
| routeParentStatuses []gatewayapi.RouteParentStatus, | ||
| gateways []supportedGatewayWithCondition, | ||
| condition metav1.Condition, | ||
| ) (bool, error) { | ||
| // map the existing parentStatues to avoid duplications | ||
| parentStatuses := getParentStatuses(route, routeParentStatuses) | ||
|
|
||
| condition.Type = ConditionTypeProgrammed | ||
| condition.ObservedGeneration = route.GetGeneration() | ||
| condition.LastTransitionTime = metav1.Now() | ||
|
|
||
| statusChanged := false | ||
| for _, g := range gateways { | ||
| gateway := g.gateway | ||
|
|
||
| parentRefKey := routeParentStatusKey(route, g) | ||
| parentStatus, ok := parentStatuses[parentRefKey] | ||
| if ok { | ||
| // update existing parent in status. | ||
| changed := setRouteParentStatusCondition(parentStatus, condition) | ||
| if changed { | ||
| parentStatuses[parentRefKey] = parentStatus | ||
| setRouteParentInStatusForParent(route, *parentStatus, g) | ||
| } | ||
| statusChanged = statusChanged || changed | ||
| } else { | ||
| // add a new parent if the parent is not found in status. | ||
| newParentStatus := gatewayapi.RouteParentStatus{ | ||
| ParentRef: gatewayapi.ParentReference{ | ||
| Namespace: lo.ToPtr(gatewayapi.Namespace(gateway.Namespace)), | ||
| Name: gatewayapi.ObjectName(gateway.Name), | ||
| Kind: lo.ToPtr(gatewayapi.Kind("Gateway")), | ||
| Group: lo.ToPtr(gatewayapi.Group(gatewayv1.GroupName)), | ||
| SectionName: func() *gatewayapi.SectionName { | ||
| // We don't need to check whether the listener matches route's spec | ||
| // because that should already be done via getSupportedGatewayForRoute | ||
| // at this point. | ||
| if g.listenerName != "" { | ||
| return lo.ToPtr(gatewayapi.SectionName(g.listenerName)) | ||
| } | ||
| return nil | ||
| }(), | ||
|
|
||
| // TODO: set port after gateway port matching implemented: | ||
| // https://github.com/Kong/kubernetes-ingress-controller/issues/3016 | ||
| }, | ||
| ControllerName: GetControllerName(), | ||
| Conditions: []metav1.Condition{ | ||
| condition, | ||
| }, | ||
| } | ||
| setRouteParentInStatusForParent(route, newParentStatus, g) | ||
|
|
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| routeParentStatuses = append(routeParentStatuses, newParentStatus) | ||
| parentStatuses[parentRefKey] = &newParentStatus | ||
| statusChanged = true | ||
| } | ||
| } | ||
|
|
||
| // update status if needed. | ||
| if statusChanged { | ||
| if err := client.Update(ctx, route); err != nil { | ||
| return false, err | ||
| } | ||
| return true, nil | ||
| } | ||
| // no need to update if no status is changed. | ||
| return false, nil | ||
| } |
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