/
interesting_types.go
161 lines (144 loc) · 7.13 KB
/
interesting_types.go
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package entrypoint
import (
"context"
"fmt"
"github.com/datawire/dlib/dlog"
"github.com/emissary-ingress/emissary/v3/pkg/kates"
)
// thingToWatch is... uh... a thing we're gonna watch. Specifically, it's a
// K8s type name and an optional field selector.
type thingToWatch struct {
typename string
fieldselector string
}
type thingToMaybeWatch struct {
typename string
fieldselector string
ignoreIf bool
}
// GetQueries takes a set of interesting types, and returns a set of kates.Query to watch
// for them.
func GetQueries(ctx context.Context, interestingTypes map[string]thingToWatch) []kates.Query {
ns := kates.NamespaceAll
if IsAmbassadorSingleNamespace() {
ns = GetAmbassadorNamespace()
}
fs := GetAmbassadorFieldSelector()
ls := GetAmbassadorLabelSelector()
var queries []kates.Query
for snapshotname, queryinfo := range interestingTypes {
query := kates.Query{
Namespace: ns,
Name: snapshotname,
Kind: queryinfo.typename,
FieldSelector: queryinfo.fieldselector,
LabelSelector: ls,
}
if query.FieldSelector == "" {
query.FieldSelector = fs
}
queries = append(queries, query)
dlog.Debugf(ctx, "WATCHER: watching %#v", query)
}
return queries
}
// GetInterestingTypes takes a list of available server types, and returns the types we think
// are interesting to watch.
func GetInterestingTypes(ctx context.Context, serverTypeList []kates.APIResource) map[string]thingToWatch {
fs := GetAmbassadorFieldSelector()
endpointFs := "metadata.namespace!=kube-system"
if fs != "" {
endpointFs += fmt.Sprintf(",%s", fs)
}
configMapFs := fmt.Sprintf("metadata.namespace=%s", GetCloudConnectTokenResourceNamespace())
// We set interestingTypes to the list of types that we'd like to watch (if that type exits
// in this cluster).
//
// - The key in the map is the how we'll label them in the snapshot we pass to the rest of
// Ambassador.
// - The map values are a list, of potential things to watch (based on which of them exist),
// ordered from lowest-priority to highest-priority.
// - The typename in the map values should be the qualified "${name}.${version}.${group}",
// where "${name} is lowercase+plural.
// - If the map value doesn't set a field selector, then `fs` (above) will be used.
//
// Most of the interestingTypes are static, but it's completely OK to add types based
// on runtime considerations, as we do for IngressClass and the KNative stuff.
interestingTypes := map[string][]thingToMaybeWatch{
// Native Kubernetes types
//
// Note that we pull `secrets.v1.` in to "K8sSecrets". ReconcileSecrets will pull
// over the ones we need into "Secrets" and "Endpoints" respectively.
"Services": {{typename: "services.v1."}}, // New in Kubernetes 0.16.0 (2015-04-28) (v1beta{1..3} before that)
"Endpoints": {{typename: "endpoints.v1.", fieldselector: endpointFs}}, // New in Kubernetes 0.16.0 (2015-04-28) (v1beta{1..3} before that)
"K8sSecrets": {{typename: "secrets.v1."}}, // New in Kubernetes 0.16.0 (2015-04-28) (v1beta{1..3} before that)
"ConfigMaps": {{typename: "configmaps.v1.", fieldselector: configMapFs}},
"Ingresses": {
{typename: "ingresses.v1beta1.extensions"}, // New in Kubernetes 1.2.0 (2016-03-16), gone in Kubernetes 1.22.0 (2021-08-04)
{typename: "ingresses.v1beta1.networking.k8s.io"}, // New in Kubernetes 1.14.0 (2019-03-25), gone in Kubernetes 1.22.0 (2021-08-04)
{typename: "ingresses.v1.networking.k8s.io"}, // New in Kubernetes 1.19.0 (2020-08-26)
},
"IngressClasses": {
{typename: "ingressclasses.v1beta1.networking.k8s.io", ignoreIf: IsAmbassadorSingleNamespace()}, // New in Kubernetes 1.18.0 (2020-03-25), gone in Kubernetes 1.22.0 (2021-08-04)
{typename: "ingressclasses.v1.networking.k8s.io", ignoreIf: IsAmbassadorSingleNamespace()}, // New in Kubernetes 1.19.0 (2020-08-26)
},
// Gateway API (of which Emissary is one of the implementations)
"GatewayClasses": {
{typename: "gatewayclasses.v1alpha1.networking.x-k8s.io"}, // New in gateway-api 0.1.0 (2020-11-18)
//{typename: "gatewayclasses.v1alpha2.gateway.networking.k8s.io"}, // Not yet released
},
"Gateways": {
{typename: "gateways.v1alpha1.networking.x-k8s.io"}, // New in gateway-api 0.1.0 (2020-11-18)
//{typename: "gateways.v1alpha2.gateway.networking.k8s.io"}, // Not yet released
},
"HTTPRoutes": {
{typename: "httproutes.v1alpha1.networking.x-k8s.io"}, // New in gateway-api 0.1.0 (2020-11-18)
//{typename: "httproutes.v1alpha2.gateway.networking.k8s.io"}, // Not yet released
},
// Knative types
//
// Note: These keynames have a "KNative" prefix, to avoid clashing with the standard
// "networking.k8s.io" and "extensions" types.
"KNativeClusterIngresses": {{typename: "clusteringresses.v1alpha1.networking.internal.knative.dev", ignoreIf: !IsKnativeEnabled()}}, // New in Knative Serving 0.3.0 (2019-01-09)
"KNativeIngresses": {{typename: "ingresses.v1alpha1.networking.internal.knative.dev", ignoreIf: !IsKnativeEnabled()}}, // New in Knative Serving 0.7.0 (2019-06-25)
// Native Emissary types
"AuthServices": {{typename: "authservices.v3alpha1.getambassador.io"}},
"ConsulResolvers": {{typename: "consulresolvers.v3alpha1.getambassador.io"}},
"DevPortals": {{typename: "devportals.v3alpha1.getambassador.io"}},
"Hosts": {{typename: "hosts.v3alpha1.getambassador.io"}},
"KubernetesEndpointResolvers": {{typename: "kubernetesendpointresolvers.v3alpha1.getambassador.io"}},
"KubernetesServiceResolvers": {{typename: "kubernetesserviceresolvers.v3alpha1.getambassador.io"}},
"Listeners": {{typename: "listeners.v3alpha1.getambassador.io"}},
"LogServices": {{typename: "logservices.v3alpha1.getambassador.io"}},
"Mappings": {{typename: "mappings.v3alpha1.getambassador.io"}},
"Modules": {{typename: "modules.v3alpha1.getambassador.io"}},
"RateLimitServices": {{typename: "ratelimitservices.v3alpha1.getambassador.io"}},
"TCPMappings": {{typename: "tcpmappings.v3alpha1.getambassador.io"}},
"TLSContexts": {{typename: "tlscontexts.v3alpha1.getambassador.io"}},
"TracingServices": {{typename: "tracingservices.v3alpha1.getambassador.io"}},
}
var serverTypes map[string]kates.APIResource
if serverTypeList != nil {
serverTypes = make(map[string]kates.APIResource, len(serverTypeList))
for _, typeinfo := range serverTypeList {
serverTypes[typeinfo.Name+"."+typeinfo.Version+"."+typeinfo.Group] = typeinfo
}
}
ret := make(map[string]thingToWatch)
for k, queryinfos := range interestingTypes {
var last thingToWatch
for _, queryinfo := range queryinfos {
if queryinfo.ignoreIf {
continue
}
last = thingToWatch{queryinfo.typename, queryinfo.fieldselector}
if _, haveType := serverTypes[queryinfo.typename]; haveType || serverTypes == nil {
ret[k] = last
}
}
if _, found := ret[k]; !found && last != (thingToWatch{}) {
dlog.Warnf(ctx, "Warning, unable to watch %s, unknown kind.", last.typename)
}
}
return ret
}