package consulcatalog import ( "context" "errors" "fmt" "hash/fnv" "net" "sort" "strings" "github.com/hashicorp/consul/api" "github.com/rs/zerolog/log" "github.com/traefik/traefik/v2/pkg/config/dynamic" "github.com/traefik/traefik/v2/pkg/config/label" "github.com/traefik/traefik/v2/pkg/logs" "github.com/traefik/traefik/v2/pkg/provider" "github.com/traefik/traefik/v2/pkg/provider/constraints" ) func (p *Provider) buildConfiguration(ctx context.Context, items []itemData, certInfo *connectCert) *dynamic.Configuration { configurations := make(map[string]*dynamic.Configuration) for _, item := range items { svcName := provider.Normalize(item.Node + "-" + item.Name + "-" + item.ID) logger := log.Ctx(ctx).With().Str(logs.ServiceName, svcName).Logger() ctxSvc := logger.WithContext(ctx) if !p.keepContainer(ctxSvc, item) { continue } confFromLabel, err := label.DecodeConfiguration(item.Labels) if err != nil { logger.Error().Err(err).Send() continue } var tcpOrUDP bool if len(confFromLabel.TCP.Routers) > 0 || len(confFromLabel.TCP.Services) > 0 { tcpOrUDP = true if err := p.buildTCPServiceConfiguration(item, confFromLabel.TCP); err != nil { logger.Error().Err(err).Send() continue } provider.BuildTCPRouterConfiguration(ctxSvc, confFromLabel.TCP) } if len(confFromLabel.UDP.Routers) > 0 || len(confFromLabel.UDP.Services) > 0 { tcpOrUDP = true if err := p.buildUDPServiceConfiguration(item, confFromLabel.UDP); err != nil { logger.Error().Err(err).Send() continue } provider.BuildUDPRouterConfiguration(ctxSvc, confFromLabel.UDP) } if tcpOrUDP && len(confFromLabel.HTTP.Routers) == 0 && len(confFromLabel.HTTP.Middlewares) == 0 && len(confFromLabel.HTTP.Services) == 0 { configurations[svcName] = confFromLabel continue } if item.ExtraConf.ConsulCatalog.Connect { if confFromLabel.HTTP.ServersTransports == nil { confFromLabel.HTTP.ServersTransports = make(map[string]*dynamic.ServersTransport) } serversTransportKey := itemServersTransportKey(item) if confFromLabel.HTTP.ServersTransports[serversTransportKey] == nil { confFromLabel.HTTP.ServersTransports[serversTransportKey] = certInfo.serversTransport(item) } } if err = p.buildServiceConfiguration(item, confFromLabel.HTTP); err != nil { logger.Error().Err(err).Send() continue } model := struct { Name string Labels map[string]string }{ Name: item.Name, Labels: item.Labels, } provider.BuildRouterConfiguration(ctx, confFromLabel.HTTP, getName(item), p.defaultRuleTpl, model) configurations[svcName] = confFromLabel } return provider.Merge(ctx, configurations) } func (p *Provider) keepContainer(ctx context.Context, item itemData) bool { logger := log.Ctx(ctx) if !item.ExtraConf.Enable { logger.Debug().Msg("Filtering disabled item") return false } if !p.ConnectAware && item.ExtraConf.ConsulCatalog.Connect { logger.Debug().Msg("Filtering out Connect aware item, Connect support is not enabled") return false } matches, err := constraints.MatchTags(item.Tags, p.Constraints) if err != nil { logger.Error().Err(err).Msg("Error matching constraint expressions") return false } if !matches { logger.Debug().Msgf("Container pruned by constraint expressions: %q", p.Constraints) return false } if item.Status != api.HealthPassing && item.Status != api.HealthWarning { logger.Debug().Msg("Filtering unhealthy or starting item") return false } return true } func (p *Provider) buildTCPServiceConfiguration(item itemData, configuration *dynamic.TCPConfiguration) error { if len(configuration.Services) == 0 { configuration.Services = make(map[string]*dynamic.TCPService) lb := &dynamic.TCPServersLoadBalancer{} lb.SetDefaults() configuration.Services[getName(item)] = &dynamic.TCPService{ LoadBalancer: lb, } } for name, service := range configuration.Services { if err := p.addServerTCP(item, service.LoadBalancer); err != nil { return fmt.Errorf("%s: %w", name, err) } } return nil } func (p *Provider) buildUDPServiceConfiguration(item itemData, configuration *dynamic.UDPConfiguration) error { if len(configuration.Services) == 0 { configuration.Services = make(map[string]*dynamic.UDPService) lb := &dynamic.UDPServersLoadBalancer{} configuration.Services[getName(item)] = &dynamic.UDPService{ LoadBalancer: lb, } } for name, service := range configuration.Services { if err := p.addServerUDP(item, service.LoadBalancer); err != nil { return fmt.Errorf("%s: %w", name, err) } } return nil } func (p *Provider) buildServiceConfiguration(item itemData, configuration *dynamic.HTTPConfiguration) error { if len(configuration.Services) == 0 { configuration.Services = make(map[string]*dynamic.Service) lb := &dynamic.ServersLoadBalancer{} lb.SetDefaults() configuration.Services[getName(item)] = &dynamic.Service{ LoadBalancer: lb, } } for name, service := range configuration.Services { if err := p.addServer(item, service.LoadBalancer); err != nil { return fmt.Errorf("%s: %w", name, err) } } return nil } func (p *Provider) addServerTCP(item itemData, loadBalancer *dynamic.TCPServersLoadBalancer) error { if loadBalancer == nil { return errors.New("load-balancer is not defined") } if len(loadBalancer.Servers) == 0 { loadBalancer.Servers = []dynamic.TCPServer{{}} } if item.Address == "" { return errors.New("address is missing") } port := loadBalancer.Servers[0].Port loadBalancer.Servers[0].Port = "" if port == "" { port = item.Port } if port == "" { return errors.New("port is missing") } loadBalancer.Servers[0].Address = net.JoinHostPort(item.Address, port) return nil } func (p *Provider) addServerUDP(item itemData, loadBalancer *dynamic.UDPServersLoadBalancer) error { if loadBalancer == nil { return errors.New("load-balancer is not defined") } if len(loadBalancer.Servers) == 0 { loadBalancer.Servers = []dynamic.UDPServer{{}} } if item.Address == "" { return errors.New("address is missing") } port := loadBalancer.Servers[0].Port loadBalancer.Servers[0].Port = "" if port == "" { port = item.Port } if port == "" { return errors.New("port is missing") } loadBalancer.Servers[0].Address = net.JoinHostPort(item.Address, port) return nil } func (p *Provider) addServer(item itemData, loadBalancer *dynamic.ServersLoadBalancer) error { if loadBalancer == nil { return errors.New("load-balancer is not defined") } if len(loadBalancer.Servers) == 0 { server := dynamic.Server{} server.SetDefaults() loadBalancer.Servers = []dynamic.Server{server} } if item.Address == "" { return errors.New("address is missing") } port := loadBalancer.Servers[0].Port loadBalancer.Servers[0].Port = "" if port == "" { port = item.Port } if port == "" { return errors.New("port is missing") } scheme := loadBalancer.Servers[0].Scheme loadBalancer.Servers[0].Scheme = "" if item.ExtraConf.ConsulCatalog.Connect { loadBalancer.ServersTransport = itemServersTransportKey(item) scheme = "https" } loadBalancer.Servers[0].URL = fmt.Sprintf("%s://%s", scheme, net.JoinHostPort(item.Address, port)) return nil } func itemServersTransportKey(item itemData) string { return provider.Normalize("tls-" + item.Namespace + "-" + item.Datacenter + "-" + item.Name) } func getName(i itemData) string { if !i.ExtraConf.ConsulCatalog.Canary { return provider.Normalize(i.Name) } tags := make([]string, len(i.Tags)) copy(tags, i.Tags) sort.Strings(tags) hasher := fnv.New64() hasher.Write([]byte(strings.Join(tags, ""))) return provider.Normalize(fmt.Sprintf("%s-%d", i.Name, hasher.Sum64())) }