package proxycfg import ( "context" "fmt" "github.com/hashicorp/consul/agent/cache" cachetype "github.com/hashicorp/consul/agent/cache-types" "github.com/hashicorp/consul/agent/structs" ) type handlerIngressGateway struct { handlerState } func (s *handlerIngressGateway) initialize(ctx context.Context) (ConfigSnapshot, error) { snap := newConfigSnapshotFromServiceInstance(s.serviceInstance, s.stateConfig) // Watch for root changes err := s.cache.Notify(ctx, cachetype.ConnectCARootName, &structs.DCSpecificRequest{ Datacenter: s.source.Datacenter, QueryOptions: structs.QueryOptions{Token: s.token}, Source: *s.source, }, rootsWatchID, s.ch) if err != nil { return snap, err } // Watch this ingress gateway's config entry err = s.cache.Notify(ctx, cachetype.ConfigEntryName, &structs.ConfigEntryQuery{ Kind: structs.IngressGateway, Name: s.service, Datacenter: s.source.Datacenter, QueryOptions: structs.QueryOptions{Token: s.token}, EnterpriseMeta: s.proxyID.EnterpriseMeta, }, gatewayConfigWatchID, s.ch) if err != nil { return snap, err } // Watch the ingress-gateway's list of upstreams err = s.cache.Notify(ctx, cachetype.GatewayServicesName, &structs.ServiceSpecificRequest{ Datacenter: s.source.Datacenter, QueryOptions: structs.QueryOptions{Token: s.token}, ServiceName: s.service, EnterpriseMeta: s.proxyID.EnterpriseMeta, }, gatewayServicesWatchID, s.ch) if err != nil { return snap, err } snap.IngressGateway.WatchedDiscoveryChains = make(map[string]context.CancelFunc) snap.IngressGateway.DiscoveryChain = make(map[string]*structs.CompiledDiscoveryChain) snap.IngressGateway.WatchedUpstreams = make(map[string]map[string]context.CancelFunc) snap.IngressGateway.WatchedUpstreamEndpoints = make(map[string]map[string]structs.CheckServiceNodes) snap.IngressGateway.WatchedGateways = make(map[string]map[string]context.CancelFunc) snap.IngressGateway.WatchedGatewayEndpoints = make(map[string]map[string]structs.CheckServiceNodes) return snap, nil } func (s *handlerIngressGateway) handleUpdate(ctx context.Context, u cache.UpdateEvent, snap *ConfigSnapshot) error { if u.Err != nil { return fmt.Errorf("error filling agent cache: %v", u.Err) } switch { case u.CorrelationID == rootsWatchID: roots, ok := u.Result.(*structs.IndexedCARoots) if !ok { return fmt.Errorf("invalid type for response: %T", u.Result) } snap.Roots = roots case u.CorrelationID == gatewayConfigWatchID: resp, ok := u.Result.(*structs.ConfigEntryResponse) if !ok { return fmt.Errorf("invalid type for response: %T", u.Result) } gatewayConf, ok := resp.Entry.(*structs.IngressGatewayConfigEntry) if !ok { return fmt.Errorf("invalid type for config entry: %T", resp.Entry) } snap.IngressGateway.TLSEnabled = gatewayConf.TLS.Enabled snap.IngressGateway.TLSSet = true if err := s.watchIngressLeafCert(ctx, snap); err != nil { return err } case u.CorrelationID == gatewayServicesWatchID: services, ok := u.Result.(*structs.IndexedGatewayServices) if !ok { return fmt.Errorf("invalid type for response: %T", u.Result) } // Update our upstreams and watches. var hosts []string watchedSvcs := make(map[string]struct{}) upstreamsMap := make(map[IngressListenerKey]structs.Upstreams) for _, service := range services.Services { u := makeUpstream(service) watchOpts := discoveryChainWatchOpts{ id: u.Identifier(), name: u.DestinationName, namespace: u.DestinationNamespace, partition: u.DestinationPartition, datacenter: s.source.Datacenter, } up := &handlerUpstreams{handlerState: s.handlerState} err := up.watchDiscoveryChain(ctx, snap, watchOpts) if err != nil { return fmt.Errorf("failed to watch discovery chain for %s: %v", u.Identifier(), err) } watchedSvcs[u.Identifier()] = struct{}{} hosts = append(hosts, service.Hosts...) id := IngressListenerKey{Protocol: service.Protocol, Port: service.Port} upstreamsMap[id] = append(upstreamsMap[id], u) } snap.IngressGateway.Upstreams = upstreamsMap snap.IngressGateway.Hosts = hosts snap.IngressGateway.HostsSet = true for id, cancelFn := range snap.IngressGateway.WatchedDiscoveryChains { if _, ok := watchedSvcs[id]; !ok { cancelFn() delete(snap.IngressGateway.WatchedDiscoveryChains, id) } } if err := s.watchIngressLeafCert(ctx, snap); err != nil { return err } default: return (*handlerUpstreams)(s).handleUpdateUpstreams(ctx, u, snap) } return nil } // Note: Ingress gateways are always bound to ports and never unix sockets. // This means LocalBindPort is the only possibility func makeUpstream(g *structs.GatewayService) structs.Upstream { upstream := structs.Upstream{ DestinationName: g.Service.Name, DestinationNamespace: g.Service.NamespaceOrDefault(), DestinationPartition: g.Gateway.PartitionOrDefault(), LocalBindPort: g.Port, IngressHosts: g.Hosts, // Pass the protocol that was configured on the ingress listener in order // to force that protocol on the Envoy listener. Config: map[string]interface{}{ "protocol": g.Protocol, }, } return upstream } func (s *handlerIngressGateway) watchIngressLeafCert(ctx context.Context, snap *ConfigSnapshot) error { if !snap.IngressGateway.TLSSet || !snap.IngressGateway.HostsSet { return nil } // Watch the leaf cert if snap.IngressGateway.LeafCertWatchCancel != nil { snap.IngressGateway.LeafCertWatchCancel() } ctx, cancel := context.WithCancel(ctx) err := s.cache.Notify(ctx, cachetype.ConnectCALeafName, &cachetype.ConnectCALeafRequest{ Datacenter: s.source.Datacenter, Token: s.token, Service: s.service, DNSSAN: s.generateIngressDNSSANs(snap), EnterpriseMeta: s.proxyID.EnterpriseMeta, }, leafWatchID, s.ch) if err != nil { cancel() return err } snap.IngressGateway.LeafCertWatchCancel = cancel return nil } func (s *handlerIngressGateway) generateIngressDNSSANs(snap *ConfigSnapshot) []string { // Update our leaf cert watch with wildcard entries for our DNS domains as well as any // configured custom hostnames from the service. if !snap.IngressGateway.TLSEnabled { return nil } var dnsNames []string namespaces := make(map[string]struct{}) for _, upstreams := range snap.IngressGateway.Upstreams { for _, u := range upstreams { namespaces[u.DestinationNamespace] = struct{}{} } } for ns := range namespaces { // The default namespace is special cased in DNS resolution, so special // case it here. if ns == structs.IntentionDefaultNamespace { ns = "" } else { ns = ns + "." } dnsNames = append(dnsNames, fmt.Sprintf("*.ingress.%s%s", ns, s.dnsConfig.Domain)) dnsNames = append(dnsNames, fmt.Sprintf("*.ingress.%s%s.%s", ns, s.source.Datacenter, s.dnsConfig.Domain)) if s.dnsConfig.AltDomain != "" { dnsNames = append(dnsNames, fmt.Sprintf("*.ingress.%s%s", ns, s.dnsConfig.AltDomain)) dnsNames = append(dnsNames, fmt.Sprintf("*.ingress.%s%s.%s", ns, s.source.Datacenter, s.dnsConfig.AltDomain)) } } dnsNames = append(dnsNames, snap.IngressGateway.Hosts...) return dnsNames }