kubernetes

type BackendTrafficAlgorithm int

type Client struct {
	ClusterClient *clusterClient
	// contains filtered or unexported fields
}

type ClusterResource struct {
	Name string `json:"name"`
}

type ClusterResourceList struct {
	// Items, aka "resources".
	Items []*ClusterResource `json:"resources"`
}

type EndpointSliceEndpoints struct {
	// Addresses [1..100] of the same AddressType, see also https://github.com/kubernetes/kubernetes/issues/106267
	// Basically it always has only one in our case and likely makes no sense to use more than one.
	// Pick first or one at random are possible, but skipper will pick the first.
	// If you need something else please create an issue https://github.com/zalando/skipper/issues/new/choose
	Addresses []string `json:"addresses"` // [ "10.2.13.9" ]
	// Conditions are used for deciding to drop out of load balancer or fade into the load balancer.
	Conditions *endpointsliceCondition `json:"conditions"`
	// Zone is used for zone aware traffic routing, please see also
	// https://kubernetes.io/docs/concepts/services-networking/topology-aware-routing/#constraints
	// https://kubernetes.io/docs/concepts/services-networking/topology-aware-routing/#safeguards
	// Zone aware routing will be available if https://github.com/zalando/skipper/issues/1446 is closed.
	Zone string `json:"zone"` // "eu-central-1c"
}

type Options struct {
	// KubernetesInCluster defines if skipper is deployed and running in the kubernetes cluster
	// this would make authentication with API server happen through the service account, rather than
	// running along side kubectl proxy
	KubernetesInCluster bool

	// KubernetesURL is used as the base URL for Kubernetes API requests. Defaults to http://localhost:8001.
	// (TBD: support in-cluster operation by taking the address and certificate from the standard Kubernetes
	// environment variables.)
	KubernetesURL string

	// TokenFile configures path to the token file.
	// Defaults to /var/run/secrets/kubernetes.io/serviceaccount/token when running in-cluster.
	TokenFile string

	// KubernetesNamespace is used to switch between finding ingresses in the cluster-scope or limit
	// the ingresses to only those in the specified namespace. Defaults to "" which means monitor ingresses
	// in the cluster-scope.
	KubernetesNamespace string

	// KubernetesEnableEndpointslices if set skipper will fetch
	// endpointslices instead of endpoints to scale more than 1000 pods within a service
	KubernetesEnableEndpointslices bool

	// *DEPRECATED* KubernetesEnableEastWest if set adds automatically routes
	// with "%s.%s.skipper.cluster.local" domain pattern
	KubernetesEnableEastWest bool

	// ProvideHealthcheck, when set, tells the data client to append a healthcheck route to the ingress
	// routes in case of successfully receiving the ingress items from the API (even if individual ingress
	// items may be invalid), or a failing healthcheck route when the API communication fails. The
	// healthcheck endpoint can be accessed from internal IPs on any hostname, with the path
	// /kube-system/healthz.
	//
	// When used in a custom configuration, the current filter registry needs to include the status()
	// filter, and the available predicates need to include the Source() predicate.
	ProvideHealthcheck bool

	// ProvideHTTPSRedirect, when set, tells the data client to append an HTTPS redirect route to the
	// ingress routes. This route will detect the X-Forwarded-Proto=http and respond with a 301 message
	// to the HTTPS equivalent of the same request (using the redirectTo(301, "https:") filter). The
	// X-Forwarded-Proto and X-Forwarded-Port is expected to be set by the load balancer.
	//
	// (See also https://github.com/zalando-incubator/kube-ingress-aws-controller as part of the
	// https://github.com/zalando-incubator/kubernetes-on-aws project.)
	ProvideHTTPSRedirect bool

	// HTTPSRedirectCode, when set defines which redirect code to use for redirecting from HTTP to HTTPS.
	// By default, 308 StatusPermanentRedirect is used.
	HTTPSRedirectCode int

	// DisableCatchAllRoutes, when set, tells the data client to not create catchall routes.
	DisableCatchAllRoutes bool

	// IngressClass is a regular expression to filter only those ingresses that match. If an ingress does
	// not have a class annotation or the annotation is an empty string, skipper will load it. The default
	// value for the ingress class is 'skipper'.
	//
	// For further information see:
	//		https://github.com/nginxinc/kubernetes-ingress/tree/master/examples/multiple-ingress-controllers
	IngressClass string

	// RouteGroupClass is a regular expression to filter only those RouteGroups that match. If a RouteGroup
	// does not have the required annotation (zalando.org/routegroup.class) or the annotation is an empty string,
	// skipper will load it. The default value for the RouteGroup class is 'skipper'.
	RouteGroupClass string

	// IngressLabelSelectors is a map of kubernetes labels to their values that must be present on a resource to be loaded
	// by the client. A label and its value on an Ingress must be match exactly to be loaded by Skipper.
	// If the value is irrelevant for a given configuration, it can be left empty. The default
	// value is no labels required.
	// Examples:
	//  Config [] will load all Ingresses.
	// 	Config ["skipper-enabled": ""] will load only Ingresses with a label "skipper-enabled", no matter the value.
	// 	Config ["skipper-enabled": "true"] will load only Ingresses with a label "skipper-enabled: true"
	// 	Config ["skipper-enabled": "", "foo": "bar"] will load only Ingresses with both labels while label "foo" must have a value "bar".
	IngressLabelSelectors map[string]string

	// ServicesLabelSelectors is a map of kubernetes labels to their values that must be present on a resource to be loaded
	// by the client. Read documentation for IngressLabelSelectors for examples and more details.
	// The default value is no labels required.
	ServicesLabelSelectors map[string]string

	// EndpointsLabelSelectors is a map of kubernetes labels to their values that must be present on a resource to be loaded
	// by the client. Read documentation for IngressLabelSelectors for examples and more details.
	// The default value is no labels required.
	EndpointsLabelSelectors map[string]string

	// EndpointSlicesLabelSelectors is a map of kubernetes labels to their values that must be present on a resource to be loaded
	// by the client. Read documentation for IngressLabelSelectors for examples and more details.
	// The default value is no labels required.
	EndpointSlicesLabelSelectors map[string]string

	// SecretsLabelSelectors is a map of kubernetes labels to their values that must be present on a resource to be loaded
	// by the client. Read documentation for IngressLabelSelectors for examples and more details.
	// The default value is no labels required.
	SecretsLabelSelectors map[string]string

	// RouteGroupsLabelSelectors is a map of kubernetes labels to their values that must be present on a resource to be loaded
	// by the client. Read documentation for IngressLabelSelectors for examples and more details.
	// The default value is no labels required.
	RouteGroupsLabelSelectors map[string]string

	// ReverseSourcePredicate set to true will do the Source IP
	// whitelisting for the heartbeat endpoint correctly in AWS.
	// Amazon's ALB writes the client IP to the last item of the
	// string list of the X-Forwarded-For header, in this case you
	// want to set this to true.
	ReverseSourcePredicate bool

	// Noop, WIP.
	ForceFullUpdatePeriod time.Duration

	// WhitelistedHealthcheckCIDR to be appended to the default iprange
	WhitelistedHealthCheckCIDR []string

	// PathMode controls the default interpretation of ingress paths in cases when the ingress doesn't
	// specify it with an annotation.
	PathMode PathMode

	// *DEPRECATED *KubernetesEastWestDomain sets the DNS domain to be
	// used for east west traffic, defaults to "skipper.cluster.local"
	KubernetesEastWestDomain string

	// KubernetesEastWestRangeDomains set the the cluster internal domains for
	// east west traffic. Identified routes to such domains will include
	// the KubernetesEastWestRangePredicates.
	KubernetesEastWestRangeDomains []string

	// KubernetesEastWestRangePredicates set the Predicates that will be
	// appended to routes identified as to KubernetesEastWestRangeDomains.
	KubernetesEastWestRangePredicates []*eskip.Predicate

	// DefaultFiltersDir enables default filters mechanism and sets the location of the default filters.
	// The provided filters are then applied to all routes.
	DefaultFiltersDir string

	// OriginMarker is *deprecated* and not used anymore. It will be deleted in v1.
	OriginMarker bool

	// If the OpenTracing tag containing RouteGroup backend name
	// (using tracingTag filter) should be added to all routes
	BackendNameTracingTag bool

	// OnlyAllowedExternalNames will enable validation of ingress external names and route groups network
	// backend addresses, explicit LB endpoints validation against the list of patterns in
	// AllowedExternalNames.
	OnlyAllowedExternalNames bool

	// AllowedExternalNames contains regexp patterns of those domain names that are allowed to be
	// used with external name services (type=ExternalName).
	AllowedExternalNames []*regexp.Regexp

	CertificateRegistry *certregistry.CertRegistry

	// ForceKubernetesService overrides the default Skipper functionality to route traffic using
	// Kubernetes Endpoint, instead using Kubernetes Services.
	ForceKubernetesService bool

	// BackendTrafficAlgorithm specifies the algorithm to calculate the backend traffic.
	BackendTrafficAlgorithm BackendTrafficAlgorithm

	// DefaultLoadBalancerAlgorithm sets the default algorithm to be used for load balancing between backend endpoints,
	// available options: roundRobin, consistentHash, random, powerOfRandomNChoices
	DefaultLoadBalancerAlgorithm string
}

type PathMode int