19443784616

Committed 17 Nov 2025 08:36PM UTC coverage: 50.075% (+0.3%) from 49.791%

Build # 19443784616

Build Type

Pull #716

github

Committed by

szuecs

Commit Message

fix: deployment nil

Signed-off-by: Sandor Szücs <sandor.szuecs@zalando.de>

Pull Request Pull Request #716: feature: zalando.org/forward-backend annotation support to enable migration to eks

Run Details

41 of 50 new or added lines in 4 files covered. (82.0%)

82 existing lines in 2 files now uncovered.

2662 of 5316 relevant lines covered (50.08%)

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Source File
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95.03

/pkg/core/stack_resources.go

package core

import (
        "fmt"
        "sort"
        "strconv"
        "strings"

        log "github.com/sirupsen/logrus"
        rgv1 "github.com/szuecs/routegroup-client/apis/zalando.org/v1"
        zv1 "github.com/zalando-incubator/stackset-controller/pkg/apis/zalando.org/v1"
        appsv1 "k8s.io/api/apps/v1"
        autoscaling "k8s.io/api/autoscaling/v2"
        v1 "k8s.io/api/core/v1"
        networking "k8s.io/api/networking/v1"
        metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
        "k8s.io/apimachinery/pkg/labels"
        "k8s.io/apimachinery/pkg/util/intstr"
        "k8s.io/apimachinery/pkg/util/sets"
)

const (
        apiVersionAppsV1 = "apps/v1"
        kindDeployment   = "Deployment"

        SegmentSuffix       = "-traffic-segment"
        IngressPredicateKey = "zalando.org/skipper-predicate"
)

type ingressOrRouteGroupSpec interface {
        GetAnnotations() map[string]string
        GetHosts() []string
}

var (
        // set implementation with 0 Byte value
        selectorLabels = map[string]struct{}{
                StacksetHeritageLabelKey: {},
                StackVersionLabelKey:     {},
        }

        // PathTypeImplementationSpecific is the used implementation path type
        // for k8s.io/api/networking/v1.HTTPIngressPath resources.
        PathTypeImplementationSpecific = networking.PathTypeImplementationSpecific
)

func mapCopy(m map[string]string) map[string]string {
        newMap := map[string]string{}
        for k, v := range m {
                newMap[k] = v
        }
        return newMap
}

// limitLabels returns a limited set of labels based on the validKeys.
func limitLabels(labels map[string]string, validKeys map[string]struct{}) map[string]string {
        newLabels := make(map[string]string, len(labels))
        for k, v := range labels {
                if _, ok := validKeys[k]; ok {
                        newLabels[k] = v
                }
        }
        return newLabels
}

// templateObjectMetaInjectLabels injects labels into a pod template spec.
func objectMetaInjectLabels(objectMeta metav1.ObjectMeta, labels map[string]string) metav1.ObjectMeta {
        if objectMeta.Labels == nil {
                objectMeta.Labels = map[string]string{}
        }
        for key, value := range labels {
                if _, ok := objectMeta.Labels[key]; !ok {
                        objectMeta.Labels[key] = value
                }
        }
        return objectMeta
}

// patchForwardBackend rewrites a RouteGroupSpec to send all traffic to another cluster chosen by the operator of skipper
func patchForwardBackend(rg *rgv1.RouteGroupSpec) {
        rg.Backends = []rgv1.RouteGroupBackend{
                {
                        Name: forwardBackendName,
                        Type: rgv1.ForwardRouteGroupBackend,
                },
        }
        rg.DefaultBackends = []rgv1.RouteGroupBackendReference{
                {
                        BackendName: forwardBackendName,
                },
        }
        for i := range rg.Routes {
                rg.Routes[i].Backends = []rgv1.RouteGroupBackendReference{
                        {
                                BackendName: forwardBackendName,
                        },
                }
        }
}

func (sc *StackContainer) objectMeta(segment bool) metav1.ObjectMeta {
        resourceLabels := mapCopy(sc.Stack.Labels)

        name := sc.Name()
        if segment {
                name += SegmentSuffix
        }

        return metav1.ObjectMeta{
                Name:      name,
                Namespace: sc.Namespace(),
                Annotations: map[string]string{
                        stackGenerationAnnotationKey: strconv.FormatInt(sc.Stack.Generation, 10),
                },
                Labels: resourceLabels,
                OwnerReferences: []metav1.OwnerReference{
                        {
                                APIVersion: APIVersion,
                                Kind:       KindStack,
                                Name:       sc.Name(),
                                UID:        sc.Stack.UID,
                        },
                },
        }
}

func (sc *StackContainer) resourceMeta() metav1.ObjectMeta {
        return sc.objectMeta(false)
}

// getServicePorts gets the service ports to be used for the stack service.
func getServicePorts(stackSpec zv1.StackSpecInternal, backendPort *intstr.IntOrString) ([]v1.ServicePort, error) {
        var servicePorts []v1.ServicePort
        if stackSpec.StackSpec.Service == nil ||
                len(stackSpec.StackSpec.Service.Ports) == 0 {

                servicePorts = servicePortsFromContainers(
                        stackSpec.StackSpec.PodTemplate.Spec.Containers,
                )
        } else {
                servicePorts = stackSpec.StackSpec.Service.Ports
        }

        // validate that one port in the list maps to the backendPort.
        if backendPort != nil {
                for _, port := range servicePorts {
                        switch backendPort.Type {
                        case intstr.Int:
                                if port.Port == backendPort.IntVal {
                                        return servicePorts, nil
                                }
                        case intstr.String:
                                if port.Name == backendPort.StrVal {
                                        return servicePorts, nil
                                }
                        }
                }

                return nil, fmt.Errorf("no service ports matching backendPort '%s'", backendPort.String())
        }

        return servicePorts, nil
}

// servicePortsFromTemplate gets service port from pod template.
func servicePortsFromContainers(containers []v1.Container) []v1.ServicePort {
        ports := make([]v1.ServicePort, 0)
        for i, container := range containers {
                for j, port := range container.Ports {
                        name := fmt.Sprintf("port-%d-%d", i, j)
                        if port.Name != "" {
                                name = port.Name
                        }
                        servicePort := v1.ServicePort{
                                Name:       name,
                                Protocol:   port.Protocol,
                                Port:       port.ContainerPort,
                                TargetPort: intstr.FromInt(int(port.ContainerPort)),
                        }
                        // set default protocol if not specified
                        if servicePort.Protocol == "" {
                                servicePort.Protocol = v1.ProtocolTCP
                        }
                        ports = append(ports, servicePort)
                }
        }
        return ports
}

func (sc *StackContainer) selector() map[string]string {
        return limitLabels(sc.Stack.Labels, selectorLabels)
}

// GenerateDeployment generates a deployment as configured in the
// stack.  On cluster migrations set by stackset annotation
// "zalando.org/forward-backend", the deployment will be set to
// replicas 1.
func (sc *StackContainer) GenerateDeployment() *appsv1.Deployment {
        if _, clusterMigration := sc.Stack.Annotations[forwardBackendAnnotation]; clusterMigration {
                return nil
        }

        stack := sc.Stack

        desiredReplicas := sc.stackReplicas
        if sc.prescalingActive {
                desiredReplicas = sc.prescalingReplicas
        }

        var updatedReplicas *int32

        if desiredReplicas != 0 && !sc.ScaledDown() {
                // Stack scaled up, rescale the deployment if it's at 0 replicas, or if HPA is unused and we don't run autoscaling
                if sc.deploymentReplicas == 0 || (!sc.IsAutoscaled() && desiredReplicas != sc.deploymentReplicas) {
                        updatedReplicas = wrapReplicas(desiredReplicas)
                }
        } else {
                // Stack scaled down (manually or because it doesn't receive traffic), check if we need to scale down the deployment
                if sc.deploymentReplicas != 0 {
                        updatedReplicas = wrapReplicas(0)
                }
        }

        if updatedReplicas == nil {
                updatedReplicas = wrapReplicas(sc.deploymentReplicas)
        }

        var strategy *appsv1.DeploymentStrategy
        if stack.Spec.StackSpec.Strategy != nil {
                strategy = stack.Spec.StackSpec.Strategy.DeepCopy()
        }

        embeddedCopy := stack.Spec.StackSpec.PodTemplate.EmbeddedObjectMeta.DeepCopy()

        templateObjectMeta := metav1.ObjectMeta{
                Annotations: embeddedCopy.Annotations,
                Labels:      embeddedCopy.Labels,
        }

        deployment := &appsv1.Deployment{
                ObjectMeta: sc.resourceMeta(),
                Spec: appsv1.DeploymentSpec{
                        Replicas:        updatedReplicas,
                        MinReadySeconds: sc.Stack.Spec.StackSpec.MinReadySeconds,
                        Selector: &metav1.LabelSelector{
                                MatchLabels: sc.selector(),
                        },
                        Template: v1.PodTemplateSpec{
                                ObjectMeta: objectMetaInjectLabels(templateObjectMeta, stack.Labels),
                                Spec:       *stack.Spec.StackSpec.PodTemplate.Spec.DeepCopy(),
                        },
                },
        }
        if strategy != nil {
                deployment.Spec.Strategy = *strategy
        }

        return deployment
}

// GenerateHPA generates a hpa as configured in the
// stack.  On cluster migrations set by stackset annotation
// "zalando.org/forward-backend", the hpa will be set to
// minReplicas = maxReplicass = 1.
func (sc *StackContainer) GenerateHPA() (
        *autoscaling.HorizontalPodAutoscaler,
        error,
) {
        if _, clusterMigration := sc.Stack.Annotations[forwardBackendAnnotation]; clusterMigration {
                return nil, nil
        }

        autoscalerSpec := sc.Stack.Spec.StackSpec.Autoscaler
        trafficWeight := sc.actualTrafficWeight

        if autoscalerSpec == nil {
                return nil, nil
        }

        if sc.ScaledDown() {
                return nil, nil
        }

        result := &autoscaling.HorizontalPodAutoscaler{
                ObjectMeta: sc.resourceMeta(),
                TypeMeta: metav1.TypeMeta{
                        Kind:       "HorizontalPodAutoscaler",
                        APIVersion: "autoscaling/v2",
                },
                Spec: autoscaling.HorizontalPodAutoscalerSpec{
                        ScaleTargetRef: autoscaling.CrossVersionObjectReference{
                                APIVersion: apiVersionAppsV1,
                                Kind:       kindDeployment,
                                Name:       sc.Name(),
                        },
                },
        }

        result.Spec.MinReplicas = autoscalerSpec.MinReplicas
        result.Spec.MaxReplicas = autoscalerSpec.MaxReplicas

        metrics, annotations, err := convertCustomMetrics(
                sc.Name()+SegmentSuffix,
                sc.Name(),
                sc.Namespace(),
                autoscalerMetricsList(autoscalerSpec.Metrics),
                trafficWeight,
        )

        if err != nil {
                return nil, err
        }
        result.Spec.Metrics = metrics
        result.Annotations = mergeLabels(result.Annotations, annotations)
        result.Spec.Behavior = autoscalerSpec.Behavior

        // If prescaling is enabled, ensure we have at least `precalingReplicas` pods
        if sc.prescalingActive && (result.Spec.MinReplicas == nil || *result.Spec.MinReplicas < sc.prescalingReplicas) {
                pr := sc.prescalingReplicas
                result.Spec.MinReplicas = &pr
        }

        return result, nil
}

func (sc *StackContainer) GenerateService() (*v1.Service, error) {
        // get service ports to be used for the service
        var backendPort *intstr.IntOrString
        // Ingress or external managed Ingress
        if sc.HasBackendPort() {
                backendPort = sc.backendPort
        }

        servicePorts, err := getServicePorts(sc.Stack.Spec, backendPort)
        if err != nil {
                return nil, err
        }

        metaObj := sc.resourceMeta()
        stackSpec := sc.Stack.Spec
        if stackSpec.StackSpec.Service != nil {
                metaObj.Annotations = mergeLabels(
                        metaObj.Annotations,
                        stackSpec.StackSpec.Service.Annotations,
                )
        }
        return &v1.Service{
                ObjectMeta: metaObj,
                Spec: v1.ServiceSpec{
                        Selector: sc.selector(),
                        Type:     v1.ServiceTypeClusterIP,
                        Ports:    servicePorts,
                },
        }, nil
}

func (sc *StackContainer) stackHostnames(
        spec ingressOrRouteGroupSpec,
        segment bool,
) []string {
        // The Ingress segment uses the original hostnames
        if segment {
                return spec.GetHosts()
        }
        result := sets.NewString()

        // Old-style autogenerated hostnames
        for _, host := range spec.GetHosts() {
                for _, domain := range sc.clusterDomains {
                        if strings.HasSuffix(host, domain) {
                                result.Insert(fmt.Sprintf("%s.%s", sc.Name(), domain))
                        } else {
                                log.Debugf(
                                        "Ingress host: %s suffix did not match cluster-domain %s",
                                        host,
                                        domain,
                                )
                        }
                }
        }
        return result.List()
}

func (sc *StackContainer) GenerateIngress() (*networking.Ingress, error) {
        return sc.generateIngress(false)
}

func (sc *StackContainer) GenerateIngressSegment() (
        *networking.Ingress,
        error,
) {
        res, err := sc.generateIngress(true)
        if err != nil || res == nil {
                return res, err
        }

        // Synchronize annotations specified in the StackSet.
        res.Annotations = syncAnnotations(
                res.Annotations,
                sc.syncAnnotationsInIngress,
                sc.ingressAnnotationsToSync,
        )

        if predVal, ok := res.Annotations[IngressPredicateKey]; !ok || predVal == "" {
                res.Annotations = mergeLabels(
                        res.Annotations,
                        map[string]string{IngressPredicateKey: sc.trafficSegment()},
                )
        } else {
                res.Annotations = mergeLabels(
                        res.Annotations,
                        map[string]string{
                                IngressPredicateKey: sc.trafficSegment() + " && " + predVal,
                        },
                )
        }

        return res, nil
}

// generateIngress generates an ingress as configured in the stack.
// On cluster migrations set by stackset annotation
// "zalando.org/forward-backend", the annotation will be copied to the
// ingress.
func (sc *StackContainer) generateIngress(segment bool) (
        *networking.Ingress,
        error,
) {

        if !sc.HasBackendPort() || sc.ingressSpec == nil {
                return nil, nil
        }

        hostnames := sc.stackHostnames(sc.ingressSpec, segment)
        if len(hostnames) == 0 {
                return nil, nil
        }

        rules := make([]networking.IngressRule, 0, len(hostnames))
        for _, hostname := range hostnames {
                rules = append(rules, networking.IngressRule{
                        IngressRuleValue: networking.IngressRuleValue{
                                HTTP: &networking.HTTPIngressRuleValue{
                                        Paths: []networking.HTTPIngressPath{
                                                {
                                                        PathType: &PathTypeImplementationSpecific,
                                                        Path:     sc.ingressSpec.Path,
                                                        Backend: networking.IngressBackend{
                                                                Service: &networking.IngressServiceBackend{
                                                                        Name: sc.Name(),
                                                                        Port: networking.ServiceBackendPort{
                                                                                Name:   sc.backendPort.StrVal,
                                                                                Number: sc.backendPort.IntVal,
                                                                        },
                                                                },
                                                        },
                                                },
                                        },
                                },
                        },
                        Host: hostname,
                })
        }

        // sort rules by hostname for a stable order
        sort.Slice(rules, func(i, j int) bool {
                return rules[i].Host < rules[j].Host
        })

        result := &networking.Ingress{
                ObjectMeta: sc.objectMeta(segment),
                Spec: networking.IngressSpec{
                        Rules: rules,
                },
        }
        if _, clusterMigration := sc.Stack.Annotations[forwardBackendAnnotation]; clusterMigration {
                // see https://opensource.zalando.com/skipper/kubernetes/ingress-usage/#skipper-ingress-annotations
                result.Annotations["zalando.org/skipper-backend"] = "forward"
        }

        // insert annotations
        result.Annotations = mergeLabels(
                result.Annotations,
                sc.ingressSpec.GetAnnotations(),
        )

        return result, nil
}

func (sc *StackContainer) GenerateRouteGroup() (*rgv1.RouteGroup, error) {
        return sc.generateRouteGroup(false)
}

func (sc *StackContainer) GenerateRouteGroupSegment() (
        *rgv1.RouteGroup,
        error,
) {
        res, err := sc.generateRouteGroup(true)
        if err != nil || res == nil {
                return res, err
        }

        // Synchronize annotations specified in the StackSet.
        res.Annotations = syncAnnotations(
                res.Annotations,
                sc.syncAnnotationsInRouteGroup,
                sc.ingressAnnotationsToSync,
        )

        segmentedRoutes := []rgv1.RouteGroupRouteSpec{}
        for _, r := range res.Spec.Routes {
                r.Predicates = append(r.Predicates, sc.trafficSegment())
                segmentedRoutes = append(segmentedRoutes, r)
        }
        res.Spec.Routes = segmentedRoutes

        return res, nil
}

// generateRouteGroup generates an RouteGroup as configured in the
// stack.  On cluster migrations set by stackset annotation
// "zalando.org/forward-backend", the RouteGroup will be patched by
// patchForwardBackend() to execute the migration.
func (sc *StackContainer) generateRouteGroup(segment bool) (
        *rgv1.RouteGroup,
        error,
) {
        if !sc.HasBackendPort() || sc.routeGroupSpec == nil {
                return nil, nil
        }

        hostnames := sc.stackHostnames(sc.routeGroupSpec, segment)
        if len(hostnames) == 0 {
                return nil, nil
        }

        result := &rgv1.RouteGroup{
                ObjectMeta: sc.objectMeta(segment),
                Spec: rgv1.RouteGroupSpec{
                        Hosts: hostnames,
                        Backends: []rgv1.RouteGroupBackend{
                                {
                                        Name:        sc.Name(),
                                        Type:        rgv1.ServiceRouteGroupBackend,
                                        ServiceName: sc.Name(),
                                        ServicePort: sc.backendPort.IntValue(),
                                        Algorithm:   sc.routeGroupSpec.LBAlgorithm,
                                },
                        },
                        DefaultBackends: []rgv1.RouteGroupBackendReference{
                                {
                                        BackendName: sc.Name(),
                                        Weight:      100,
                                },
                        },
                },
        }

        result.Spec.Routes = sc.routeGroupSpec.Routes

        // validate not overlapping with main backend
        for _, backend := range sc.routeGroupSpec.AdditionalBackends {
                if backend.Name == sc.Name() {
                        return nil, fmt.Errorf("invalid additionalBackend '%s', overlaps with Stack name", backend.Name)
                }
                if backend.ServiceName == sc.Name() {
                        return nil, fmt.Errorf("invalid additionalBackend '%s', serviceName '%s' overlaps with Stack name", backend.Name, backend.ServiceName)
                }
                result.Spec.Backends = append(result.Spec.Backends, backend)
        }

        // sort backends to ensure have a consistent generated RouteGroup resource
        sort.Slice(result.Spec.Backends, func(i, j int) bool {
                return result.Spec.Backends[i].Name < result.Spec.Backends[j].Name
        })

        // insert annotations
        result.Annotations = mergeLabels(
                result.Annotations,
                sc.routeGroupSpec.GetAnnotations(),
        )

        if _, clusterMigration := sc.Stack.Annotations[forwardBackendAnnotation]; clusterMigration {
                patchForwardBackend(&result.Spec)
        }

        return result, nil
}

func (sc *StackContainer) trafficSegment() string {
        return fmt.Sprintf(
                segmentString,
                sc.segmentLowerLimit,
                sc.segmentUpperLimit,
        )
}

func (sc *StackContainer) UpdateObjectMeta(objMeta *metav1.ObjectMeta) *metav1.ObjectMeta {
        metaObj := sc.resourceMeta()
        objMeta.OwnerReferences = metaObj.OwnerReferences
        objMeta.Labels = mergeLabels(metaObj.Labels, objMeta.Labels)
        objMeta.Annotations = mergeLabels(metaObj.Annotations, objMeta.Annotations)

        return objMeta
}

func (sc *StackContainer) GenerateStackStatus() *zv1.StackStatus {
        prescaling := zv1.PrescalingStatus{}
        if sc.prescalingActive {
                prescaling = zv1.PrescalingStatus{
                        Active:               sc.prescalingActive,
                        Replicas:             sc.prescalingReplicas,
                        DesiredTrafficWeight: sc.prescalingDesiredTrafficWeight,
                        LastTrafficIncrease:  wrapTime(sc.prescalingLastTrafficIncrease),
                }
        }
        return &zv1.StackStatus{
                ActualTrafficWeight:  sc.actualTrafficWeight,
                DesiredTrafficWeight: sc.desiredTrafficWeight,
                Replicas:             sc.createdReplicas,
                ReadyReplicas:        sc.readyReplicas,
                UpdatedReplicas:      sc.updatedReplicas,
                DesiredReplicas:      sc.deploymentReplicas,
                Prescaling:           prescaling,
                NoTrafficSince:       wrapTime(sc.noTrafficSince),
                LabelSelector:        labels.Set(sc.selector()).String(),
        }
}

func (sc *StackContainer) GeneratePlatformCredentialsSet(pcs *zv1.PCS) (*zv1.PlatformCredentialsSet, error) {
        if pcs.Tokens == nil {
                return nil, fmt.Errorf("platformCredentialsSet has no tokens")
        }

        metaObj := sc.resourceMeta()
        if _, ok := sc.Stack.Labels["application"]; !ok {
                return nil, fmt.Errorf("stack has no label application")
        }
        metaObj.Name = pcs.Name

        result := &zv1.PlatformCredentialsSet{
                ObjectMeta: metaObj,
                TypeMeta: metav1.TypeMeta{
                        Kind:       "PlatformCredentialsSet",
                        APIVersion: "zalando.org/v1",
                },
                Spec: zv1.PlatformCredentialsSpec{
                        Application:  metaObj.Labels["application"],
                        TokenVersion: "v2",
                        Tokens:       pcs.Tokens,
                },
        }

        return result, nil
}

1	package core
2
3	import (
4	"fmt"
5	"sort"
6	"strconv"
7	"strings"
8
9	log "github.com/sirupsen/logrus"
10	rgv1 "github.com/szuecs/routegroup-client/apis/zalando.org/v1"
11	zv1 "github.com/zalando-incubator/stackset-controller/pkg/apis/zalando.org/v1"
12	appsv1 "k8s.io/api/apps/v1"
13	autoscaling "k8s.io/api/autoscaling/v2"
14	v1 "k8s.io/api/core/v1"
15	networking "k8s.io/api/networking/v1"
16	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
17	"k8s.io/apimachinery/pkg/labels"
18	"k8s.io/apimachinery/pkg/util/intstr"
19	"k8s.io/apimachinery/pkg/util/sets"
20	)
21
22	const (
23	apiVersionAppsV1 = "apps/v1"
24	kindDeployment = "Deployment"
25
26	SegmentSuffix = "-traffic-segment"
27	IngressPredicateKey = "zalando.org/skipper-predicate"
28	)
29
30	type ingressOrRouteGroupSpec interface {
31	GetAnnotations() map[string]string
32	GetHosts() []string
33	}
34
35	var (
36	// set implementation with 0 Byte value
37	selectorLabels = map[string]struct{}{
38	StacksetHeritageLabelKey: {},
39	StackVersionLabelKey: {},
40	}
41
42	// PathTypeImplementationSpecific is the used implementation path type
43	// for k8s.io/api/networking/v1.HTTPIngressPath resources.
44	PathTypeImplementationSpecific = networking.PathTypeImplementationSpecific
45	)
46
47	func mapCopy(m map[string]string) map[string]string {	1✔
48	newMap := map[string]string{}	1✔
49	for k, v := range m {	2✔
50	newMap[k] = v	1✔
51	}	1✔
52	return newMap	1✔
53	}
54
55	// limitLabels returns a limited set of labels based on the validKeys.
56	func limitLabels(labels map[string]string, validKeys map[string]struct{}) map[string]string {	1✔
57	newLabels := make(map[string]string, len(labels))	1✔
58	for k, v := range labels {	2✔
59	if _, ok := validKeys[k]; ok {	2✔
60	newLabels[k] = v	1✔
61	}	1✔
62	}
63	return newLabels	1✔
64	}
65
66	// templateObjectMetaInjectLabels injects labels into a pod template spec.
67	func objectMetaInjectLabels(objectMeta metav1.ObjectMeta, labels map[string]string) metav1.ObjectMeta {	1✔
68	if objectMeta.Labels == nil {	2✔
69	objectMeta.Labels = map[string]string{}	1✔
70	}	1✔
71	for key, value := range labels {	2✔
72	if _, ok := objectMeta.Labels[key]; !ok {	2✔
73	objectMeta.Labels[key] = value	1✔
74	}	1✔
75	}
76	return objectMeta	1✔
77	}
78
79	// patchForwardBackend rewrites a RouteGroupSpec to send all traffic to another cluster chosen by the operator of skipper
80	func patchForwardBackend(rg *rgv1.RouteGroupSpec) {	1✔
81	rg.Backends = []rgv1.RouteGroupBackend{	1✔
82	{	1✔
83	Name: forwardBackendName,	1✔
84	Type: rgv1.ForwardRouteGroupBackend,	1✔
85	},	1✔
86	}	1✔
87	rg.DefaultBackends = []rgv1.RouteGroupBackendReference{	1✔
88	{	1✔
89	BackendName: forwardBackendName,	1✔
90	},	1✔
91	}	1✔
92	for i := range rg.Routes {	2✔
93	rg.Routes[i].Backends = []rgv1.RouteGroupBackendReference{	1✔
94	{	1✔
95	BackendName: forwardBackendName,	1✔
96	},	1✔
97	}	1✔
98	}	1✔
99	}
100
101	func (sc *StackContainer) objectMeta(segment bool) metav1.ObjectMeta {	1✔
102	resourceLabels := mapCopy(sc.Stack.Labels)	1✔
103		1✔
104	name := sc.Name()	1✔
105	if segment {	2✔
106	name += SegmentSuffix	1✔
107	}	1✔
108
109	return metav1.ObjectMeta{	1✔
110	Name: name,	1✔
111	Namespace: sc.Namespace(),	1✔
112	Annotations: map[string]string{	1✔
113	stackGenerationAnnotationKey: strconv.FormatInt(sc.Stack.Generation, 10),	1✔
114	},	1✔
115	Labels: resourceLabels,	1✔
116	OwnerReferences: []metav1.OwnerReference{	1✔
117	{	1✔
118	APIVersion: APIVersion,	1✔
119	Kind: KindStack,	1✔
120	Name: sc.Name(),	1✔
121	UID: sc.Stack.UID,	1✔
122	},	1✔
123	},	1✔
124	}	1✔
125	}
126
127	func (sc *StackContainer) resourceMeta() metav1.ObjectMeta {	1✔
128	return sc.objectMeta(false)	1✔
129	}	1✔
130
131	// getServicePorts gets the service ports to be used for the stack service.
132	func getServicePorts(stackSpec zv1.StackSpecInternal, backendPort *intstr.IntOrString) ([]v1.ServicePort, error) {	1✔
133	var servicePorts []v1.ServicePort	1✔
134	if stackSpec.StackSpec.Service == nil \|\|	1✔
135	len(stackSpec.StackSpec.Service.Ports) == 0 {	2✔
136		1✔
137	servicePorts = servicePortsFromContainers(	1✔
138	stackSpec.StackSpec.PodTemplate.Spec.Containers,	1✔
139	)	1✔
140	} else {	2✔
141	servicePorts = stackSpec.StackSpec.Service.Ports	1✔
142	}	1✔
143
144	// validate that one port in the list maps to the backendPort.
145	if backendPort != nil {	2✔
146	for _, port := range servicePorts {	2✔
147	switch backendPort.Type {	1✔
148	case intstr.Int:	1✔
149	if port.Port == backendPort.IntVal {	2✔
150	return servicePorts, nil	1✔
151	}	1✔
152	case intstr.String:	1✔
153	if port.Name == backendPort.StrVal {	2✔
154	return servicePorts, nil	1✔
155	}	1✔
156	}
157	}
158
159	return nil, fmt.Errorf("no service ports matching backendPort '%s'", backendPort.String())	1✔
160	}
161
162	return servicePorts, nil	1✔
163	}
164
165	// servicePortsFromTemplate gets service port from pod template.
166	func servicePortsFromContainers(containers []v1.Container) []v1.ServicePort {	1✔
167	ports := make([]v1.ServicePort, 0)	1✔
168	for i, container := range containers {	2✔
169	for j, port := range container.Ports {	2✔
170	name := fmt.Sprintf("port-%d-%d", i, j)	1✔
171	if port.Name != "" {	2✔
172	name = port.Name	1✔
173	}	1✔
174	servicePort := v1.ServicePort{	1✔
175	Name: name,	1✔
176	Protocol: port.Protocol,	1✔
177	Port: port.ContainerPort,	1✔
178	TargetPort: intstr.FromInt(int(port.ContainerPort)),	1✔
179	}	1✔
180	// set default protocol if not specified	1✔
181	if servicePort.Protocol == "" {	2✔
182	servicePort.Protocol = v1.ProtocolTCP	1✔
183	}	1✔
184	ports = append(ports, servicePort)	1✔
185	}
186	}
187	return ports	1✔
188	}
189
190	func (sc *StackContainer) selector() map[string]string {	1✔
191	return limitLabels(sc.Stack.Labels, selectorLabels)	1✔
192	}	1✔
193
194	// GenerateDeployment generates a deployment as configured in the
195	// stack. On cluster migrations set by stackset annotation
196	// "zalando.org/forward-backend", the deployment will be set to
197	// replicas 1.
198	func (sc StackContainer) GenerateDeployment() appsv1.Deployment {	1✔
199	if _, clusterMigration := sc.Stack.Annotations[forwardBackendAnnotation]; clusterMigration {	2✔
200	return nil	1✔
201	}	1✔
202
203	stack := sc.Stack	1✔
204		1✔
205	desiredReplicas := sc.stackReplicas	1✔
206	if sc.prescalingActive {	2✔
207	desiredReplicas = sc.prescalingReplicas	1✔
208	}	1✔
209
210	var updatedReplicas *int32	1✔
211		1✔
212	if desiredReplicas != 0 && !sc.ScaledDown() {	2✔
213	// Stack scaled up, rescale the deployment if it's at 0 replicas, or if HPA is unused and we don't run autoscaling	1✔
214	if sc.deploymentReplicas == 0 \|\| (!sc.IsAutoscaled() && desiredReplicas != sc.deploymentReplicas) {	2✔
215	updatedReplicas = wrapReplicas(desiredReplicas)	1✔
216	}	1✔
217	} else {	1✔
218	// Stack scaled down (manually or because it doesn't receive traffic), check if we need to scale down the deployment	1✔
219	if sc.deploymentReplicas != 0 {	2✔
220	updatedReplicas = wrapReplicas(0)	1✔
221	}	1✔
222	}
223
224	if updatedReplicas == nil {	2✔
225	updatedReplicas = wrapReplicas(sc.deploymentReplicas)	1✔
226	}	1✔
227
228	var strategy *appsv1.DeploymentStrategy	1✔
229	if stack.Spec.StackSpec.Strategy != nil {	2✔
230	strategy = stack.Spec.StackSpec.Strategy.DeepCopy()	1✔
231	}	1✔
232
233	embeddedCopy := stack.Spec.StackSpec.PodTemplate.EmbeddedObjectMeta.DeepCopy()	1✔
234		1✔
235	templateObjectMeta := metav1.ObjectMeta{	1✔
236	Annotations: embeddedCopy.Annotations,	1✔
237	Labels: embeddedCopy.Labels,	1✔
238	}	1✔
239		1✔
240	deployment := &appsv1.Deployment{	1✔
241	ObjectMeta: sc.resourceMeta(),	1✔
242	Spec: appsv1.DeploymentSpec{	1✔
243	Replicas: updatedReplicas,	1✔
244	MinReadySeconds: sc.Stack.Spec.StackSpec.MinReadySeconds,	1✔
245	Selector: &metav1.LabelSelector{	1✔
246	MatchLabels: sc.selector(),	1✔
247	},	1✔
248	Template: v1.PodTemplateSpec{	1✔
249	ObjectMeta: objectMetaInjectLabels(templateObjectMeta, stack.Labels),	1✔
250	Spec: *stack.Spec.StackSpec.PodTemplate.Spec.DeepCopy(),	1✔
251	},	1✔
252	},	1✔
253	}	1✔
254	if strategy != nil {	2✔
255	deployment.Spec.Strategy = *strategy	1✔
256	}	1✔
257
258	return deployment	1✔
259	}
260
261	// GenerateHPA generates a hpa as configured in the
262	// stack. On cluster migrations set by stackset annotation
263	// "zalando.org/forward-backend", the hpa will be set to
264	// minReplicas = maxReplicass = 1.
265	func (sc *StackContainer) GenerateHPA() (
266	*autoscaling.HorizontalPodAutoscaler,
267	error,
268	) {	1✔
269	if _, clusterMigration := sc.Stack.Annotations[forwardBackendAnnotation]; clusterMigration {	2✔
270	return nil, nil	1✔
271	}	1✔
272
273	autoscalerSpec := sc.Stack.Spec.StackSpec.Autoscaler	1✔
274	trafficWeight := sc.actualTrafficWeight	1✔
275		1✔
276	if autoscalerSpec == nil {	1✔
UNCOV 277	return nil, nil	×
UNCOV 278	}	×
279
280	if sc.ScaledDown() {	2✔
281	return nil, nil	1✔
282	}	1✔
283
284	result := &autoscaling.HorizontalPodAutoscaler{	1✔
285	ObjectMeta: sc.resourceMeta(),	1✔
286	TypeMeta: metav1.TypeMeta{	1✔
287	Kind: "HorizontalPodAutoscaler",	1✔
288	APIVersion: "autoscaling/v2",	1✔
289	},	1✔
290	Spec: autoscaling.HorizontalPodAutoscalerSpec{	1✔
291	ScaleTargetRef: autoscaling.CrossVersionObjectReference{	1✔
292	APIVersion: apiVersionAppsV1,	1✔
293	Kind: kindDeployment,	1✔
294	Name: sc.Name(),	1✔
295	},	1✔
296	},	1✔
297	}	1✔
298		1✔
299	result.Spec.MinReplicas = autoscalerSpec.MinReplicas	1✔
300	result.Spec.MaxReplicas = autoscalerSpec.MaxReplicas	1✔
301		1✔
302	metrics, annotations, err := convertCustomMetrics(	1✔
303	sc.Name()+SegmentSuffix,	1✔
304	sc.Name(),	1✔
305	sc.Namespace(),	1✔
306	autoscalerMetricsList(autoscalerSpec.Metrics),	1✔
307	trafficWeight,	1✔
308	)	1✔
309		1✔
310	if err != nil {	1✔
UNCOV 311	return nil, err	×
UNCOV 312	}	×
313	result.Spec.Metrics = metrics	1✔
314	result.Annotations = mergeLabels(result.Annotations, annotations)	1✔
315	result.Spec.Behavior = autoscalerSpec.Behavior	1✔
316		1✔
317	// If prescaling is enabled, ensure we have at least `precalingReplicas` pods	1✔
318	if sc.prescalingActive && (result.Spec.MinReplicas == nil \|\| *result.Spec.MinReplicas < sc.prescalingReplicas) {	1✔
UNCOV 319	pr := sc.prescalingReplicas	×
UNCOV 320	result.Spec.MinReplicas = &pr	×
321	}	×
322
323	return result, nil	1✔
324	}
325
326	func (sc StackContainer) GenerateService() (v1.Service, error) {	1✔
327	// get service ports to be used for the service	1✔
328	var backendPort *intstr.IntOrString	1✔
329	// Ingress or external managed Ingress	1✔
330	if sc.HasBackendPort() {	1✔
UNCOV 331	backendPort = sc.backendPort	×
UNCOV 332	}	×
333
334	servicePorts, err := getServicePorts(sc.Stack.Spec, backendPort)	1✔
335	if err != nil {	1✔
336	return nil, err	×
UNCOV 337	}	×
338
339	metaObj := sc.resourceMeta()	1✔
340	stackSpec := sc.Stack.Spec	1✔
341	if stackSpec.StackSpec.Service != nil {	2✔
342	metaObj.Annotations = mergeLabels(	1✔
343	metaObj.Annotations,	1✔
344	stackSpec.StackSpec.Service.Annotations,	1✔
345	)	1✔
346	}	1✔
347	return &v1.Service{	1✔
348	ObjectMeta: metaObj,	1✔
349	Spec: v1.ServiceSpec{	1✔
350	Selector: sc.selector(),	1✔
351	Type: v1.ServiceTypeClusterIP,	1✔
352	Ports: servicePorts,	1✔
353	},	1✔
354	}, nil	1✔
355	}
356
357	func (sc *StackContainer) stackHostnames(
358	spec ingressOrRouteGroupSpec,
359	segment bool,
360	) []string {	1✔
361	// The Ingress segment uses the original hostnames	1✔
362	if segment {	2✔
363	return spec.GetHosts()	1✔
364	}	1✔
365	result := sets.NewString()	1✔
366		1✔
367	// Old-style autogenerated hostnames	1✔
368	for _, host := range spec.GetHosts() {	2✔
369	for _, domain := range sc.clusterDomains {	2✔
370	if strings.HasSuffix(host, domain) {	2✔
371	result.Insert(fmt.Sprintf("%s.%s", sc.Name(), domain))	1✔
372	} else {	2✔
373	log.Debugf(	1✔
374	"Ingress host: %s suffix did not match cluster-domain %s",	1✔
375	host,	1✔
376	domain,	1✔
377	)	1✔
378	}	1✔
379	}
380	}
381	return result.List()	1✔
382	}
383
384	func (sc StackContainer) GenerateIngress() (networking.Ingress, error) {	1✔
385	return sc.generateIngress(false)	1✔
386	}	1✔
387
388	func (sc *StackContainer) GenerateIngressSegment() (
389	*networking.Ingress,
390	error,
391	) {	1✔
392	res, err := sc.generateIngress(true)	1✔
393	if err != nil \|\| res == nil {	2✔
394	return res, err	1✔
395	}	1✔
396
397	// Synchronize annotations specified in the StackSet.
398	res.Annotations = syncAnnotations(	1✔
399	res.Annotations,	1✔
400	sc.syncAnnotationsInIngress,	1✔
401	sc.ingressAnnotationsToSync,	1✔
402	)	1✔
403		1✔
404	if predVal, ok := res.Annotations[IngressPredicateKey]; !ok \|\| predVal == "" {	2✔
405	res.Annotations = mergeLabels(	1✔
406	res.Annotations,	1✔
407	map[string]string{IngressPredicateKey: sc.trafficSegment()},	1✔
408	)	1✔
409	} else {	2✔
410	res.Annotations = mergeLabels(	1✔
411	res.Annotations,	1✔
412	map[string]string{	1✔
413	IngressPredicateKey: sc.trafficSegment() + " && " + predVal,	1✔
414	},	1✔
415	)	1✔
416	}	1✔
417
418	return res, nil	1✔
419	}
420
421	// generateIngress generates an ingress as configured in the stack.
422	// On cluster migrations set by stackset annotation
423	// "zalando.org/forward-backend", the annotation will be copied to the
424	// ingress.
425	func (sc *StackContainer) generateIngress(segment bool) (
426	*networking.Ingress,
427	error,
428	) {	1✔
429		1✔
430	if !sc.HasBackendPort() \|\| sc.ingressSpec == nil {	2✔
431	return nil, nil	1✔
432	}	1✔
433
434	hostnames := sc.stackHostnames(sc.ingressSpec, segment)	1✔
435	if len(hostnames) == 0 {	2✔
436	return nil, nil	1✔
437	}	1✔
438
439	rules := make([]networking.IngressRule, 0, len(hostnames))	1✔
440	for _, hostname := range hostnames {	2✔
441	rules = append(rules, networking.IngressRule{	1✔
442	IngressRuleValue: networking.IngressRuleValue{	1✔
443	HTTP: &networking.HTTPIngressRuleValue{	1✔
444	Paths: []networking.HTTPIngressPath{	1✔
445	{	1✔
446	PathType: &PathTypeImplementationSpecific,	1✔
447	Path: sc.ingressSpec.Path,	1✔
448	Backend: networking.IngressBackend{	1✔
449	Service: &networking.IngressServiceBackend{	1✔
450	Name: sc.Name(),	1✔
451	Port: networking.ServiceBackendPort{	1✔
452	Name: sc.backendPort.StrVal,	1✔
453	Number: sc.backendPort.IntVal,	1✔
454	},	1✔
455	},	1✔
456	},	1✔
457	},	1✔
458	},	1✔
459	},	1✔
460	},	1✔
461	Host: hostname,	1✔
462	})	1✔
463	}	1✔
464
465	// sort rules by hostname for a stable order
466	sort.Slice(rules, func(i, j int) bool {	2✔
467	return rules[i].Host < rules[j].Host	1✔
468	})	1✔
469
470	result := &networking.Ingress{	1✔
471	ObjectMeta: sc.objectMeta(segment),	1✔
472	Spec: networking.IngressSpec{	1✔
473	Rules: rules,	1✔
474	},	1✔
475	}	1✔
476	if _, clusterMigration := sc.Stack.Annotations[forwardBackendAnnotation]; clusterMigration {	2✔
477	// see https://opensource.zalando.com/skipper/kubernetes/ingress-usage/#skipper-ingress-annotations	1✔
478	result.Annotations["zalando.org/skipper-backend"] = "forward"	1✔
479	}	1✔
480
481	// insert annotations
482	result.Annotations = mergeLabels(	1✔
483	result.Annotations,	1✔
484	sc.ingressSpec.GetAnnotations(),	1✔
485	)	1✔
486		1✔
487	return result, nil	1✔
488	}
489
490	func (sc StackContainer) GenerateRouteGroup() (rgv1.RouteGroup, error) {	1✔
491	return sc.generateRouteGroup(false)	1✔
492	}	1✔
493
494	func (sc *StackContainer) GenerateRouteGroupSegment() (
495	*rgv1.RouteGroup,
496	error,
497	) {	1✔
498	res, err := sc.generateRouteGroup(true)	1✔
499	if err != nil \|\| res == nil {	2✔
500	return res, err	1✔
501	}	1✔
502
503	// Synchronize annotations specified in the StackSet.
504	res.Annotations = syncAnnotations(	1✔
505	res.Annotations,	1✔
506	sc.syncAnnotationsInRouteGroup,	1✔
507	sc.ingressAnnotationsToSync,	1✔
508	)	1✔
509		1✔
510	segmentedRoutes := []rgv1.RouteGroupRouteSpec{}	1✔
511	for _, r := range res.Spec.Routes {	2✔
512	r.Predicates = append(r.Predicates, sc.trafficSegment())	1✔
513	segmentedRoutes = append(segmentedRoutes, r)	1✔
514	}	1✔
515	res.Spec.Routes = segmentedRoutes	1✔
516		1✔
517	return res, nil	1✔
518	}
519
520	// generateRouteGroup generates an RouteGroup as configured in the
521	// stack. On cluster migrations set by stackset annotation
522	// "zalando.org/forward-backend", the RouteGroup will be patched by
523	// patchForwardBackend() to execute the migration.
524	func (sc *StackContainer) generateRouteGroup(segment bool) (
525	*rgv1.RouteGroup,
526	error,
527	) {	1✔
528	if !sc.HasBackendPort() \|\| sc.routeGroupSpec == nil {	2✔
529	return nil, nil	1✔
530	}	1✔
531
532	hostnames := sc.stackHostnames(sc.routeGroupSpec, segment)	1✔
533	if len(hostnames) == 0 {	2✔
534	return nil, nil	1✔
535	}	1✔
536
537	result := &rgv1.RouteGroup{	1✔
538	ObjectMeta: sc.objectMeta(segment),	1✔
539	Spec: rgv1.RouteGroupSpec{	1✔
540	Hosts: hostnames,	1✔
541	Backends: []rgv1.RouteGroupBackend{	1✔
542	{	1✔
543	Name: sc.Name(),	1✔
544	Type: rgv1.ServiceRouteGroupBackend,	1✔
545	ServiceName: sc.Name(),	1✔
546	ServicePort: sc.backendPort.IntValue(),	1✔
547	Algorithm: sc.routeGroupSpec.LBAlgorithm,	1✔
548	},	1✔
549	},	1✔
550	DefaultBackends: []rgv1.RouteGroupBackendReference{	1✔
551	{	1✔
552	BackendName: sc.Name(),	1✔
553	Weight: 100,	1✔
554	},	1✔
555	},	1✔
556	},	1✔
557	}	1✔
558		1✔
559	result.Spec.Routes = sc.routeGroupSpec.Routes	1✔
560		1✔
561	// validate not overlapping with main backend	1✔
562	for _, backend := range sc.routeGroupSpec.AdditionalBackends {	1✔
UNCOV 563	if backend.Name == sc.Name() {	×
UNCOV 564	return nil, fmt.Errorf("invalid additionalBackend '%s', overlaps with Stack name", backend.Name)	×
UNCOV 565	}	×
UNCOV 566	if backend.ServiceName == sc.Name() {	×
567	return nil, fmt.Errorf("invalid additionalBackend '%s', serviceName '%s' overlaps with Stack name", backend.Name, backend.ServiceName)	×
568	}	×
569	result.Spec.Backends = append(result.Spec.Backends, backend)	×
570	}
571
572	// sort backends to ensure have a consistent generated RouteGroup resource
573	sort.Slice(result.Spec.Backends, func(i, j int) bool {	1✔
UNCOV 574	return result.Spec.Backends[i].Name < result.Spec.Backends[j].Name	×
UNCOV 575	})	×
576
577	// insert annotations
578	result.Annotations = mergeLabels(	1✔
579	result.Annotations,	1✔
580	sc.routeGroupSpec.GetAnnotations(),	1✔
581	)	1✔
582		1✔
583	if _, clusterMigration := sc.Stack.Annotations[forwardBackendAnnotation]; clusterMigration {	2✔
584	patchForwardBackend(&result.Spec)	1✔
585	}	1✔
586
587	return result, nil	1✔
588	}
589
590	func (sc *StackContainer) trafficSegment() string {	1✔
591	return fmt.Sprintf(	1✔
592	segmentString,	1✔
593	sc.segmentLowerLimit,	1✔
594	sc.segmentUpperLimit,	1✔
595	)	1✔
596	}	1✔
597
598	func (sc StackContainer) UpdateObjectMeta(objMeta metav1.ObjectMeta) *metav1.ObjectMeta {	1✔
599	metaObj := sc.resourceMeta()	1✔
600	objMeta.OwnerReferences = metaObj.OwnerReferences	1✔
601	objMeta.Labels = mergeLabels(metaObj.Labels, objMeta.Labels)	1✔
602	objMeta.Annotations = mergeLabels(metaObj.Annotations, objMeta.Annotations)	1✔
603		1✔
604	return objMeta	1✔
605	}	1✔
606
607	func (sc StackContainer) GenerateStackStatus() zv1.StackStatus {	1✔
608	prescaling := zv1.PrescalingStatus{}	1✔
609	if sc.prescalingActive {	2✔
610	prescaling = zv1.PrescalingStatus{	1✔
611	Active: sc.prescalingActive,	1✔
612	Replicas: sc.prescalingReplicas,	1✔
613	DesiredTrafficWeight: sc.prescalingDesiredTrafficWeight,	1✔
614	LastTrafficIncrease: wrapTime(sc.prescalingLastTrafficIncrease),	1✔
615	}	1✔
616	}	1✔
617	return &zv1.StackStatus{	1✔
618	ActualTrafficWeight: sc.actualTrafficWeight,	1✔
619	DesiredTrafficWeight: sc.desiredTrafficWeight,	1✔
620	Replicas: sc.createdReplicas,	1✔
621	ReadyReplicas: sc.readyReplicas,	1✔
622	UpdatedReplicas: sc.updatedReplicas,	1✔
623	DesiredReplicas: sc.deploymentReplicas,	1✔
624	Prescaling: prescaling,	1✔
625	NoTrafficSince: wrapTime(sc.noTrafficSince),	1✔
626	LabelSelector: labels.Set(sc.selector()).String(),	1✔
627	}	1✔
628	}
629
630	func (sc StackContainer) GeneratePlatformCredentialsSet(pcs zv1.PCS) (*zv1.PlatformCredentialsSet, error) {	1✔
631	if pcs.Tokens == nil {	1✔
UNCOV 632	return nil, fmt.Errorf("platformCredentialsSet has no tokens")	×
UNCOV 633	}	×
634
635	metaObj := sc.resourceMeta()	1✔
636	if _, ok := sc.Stack.Labels["application"]; !ok {	1✔
637	return nil, fmt.Errorf("stack has no label application")	×
UNCOV 638	}	×
639	metaObj.Name = pcs.Name	1✔
640		1✔
641	result := &zv1.PlatformCredentialsSet{	1✔
642	ObjectMeta: metaObj,	1✔
643	TypeMeta: metav1.TypeMeta{	1✔
644	Kind: "PlatformCredentialsSet",	1✔
645	APIVersion: "zalando.org/v1",	1✔
646	},	1✔
647	Spec: zv1.PlatformCredentialsSpec{	1✔
648	Application: metaObj.Labels["application"],	1✔
649	TokenVersion: "v2",	1✔
650	Tokens: pcs.Tokens,	1✔
651	},	1✔
652	}	1✔
653		1✔
654	return result, nil	1✔
655	}

zalando-incubator / stackset-controller / 19443784616

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