package ecs import ( "context" "errors" "fmt" "net" "strconv" "strings" "github.com/aws/aws-sdk-go/service/ec2" "github.com/docker/go-connections/nat" "github.com/traefik/traefik/v2/pkg/config/dynamic" "github.com/traefik/traefik/v2/pkg/config/label" "github.com/traefik/traefik/v2/pkg/log" "github.com/traefik/traefik/v2/pkg/provider" "github.com/traefik/traefik/v2/pkg/provider/constraints" ) func (p *Provider) buildConfiguration(ctx context.Context, instances []ecsInstance) *dynamic.Configuration { configurations := make(map[string]*dynamic.Configuration) for _, instance := range instances { instanceName := getServiceName(instance) + "-" + instance.ID ctxContainer := log.With(ctx, log.Str("ecs-instance", instanceName)) if !p.filterInstance(ctxContainer, instance) { continue } logger := log.FromContext(ctxContainer) confFromLabel, err := label.DecodeConfiguration(instance.Labels) if err != nil { logger.Error(err) continue } var tcpOrUDP bool if len(confFromLabel.TCP.Routers) > 0 || len(confFromLabel.TCP.Services) > 0 { tcpOrUDP = true err := p.buildTCPServiceConfiguration(instance, confFromLabel.TCP) if err != nil { logger.Error(err) continue } provider.BuildTCPRouterConfiguration(ctxContainer, confFromLabel.TCP) } if len(confFromLabel.UDP.Routers) > 0 || len(confFromLabel.UDP.Services) > 0 { tcpOrUDP = true err := p.buildUDPServiceConfiguration(instance, confFromLabel.UDP) if err != nil { logger.Error(err) continue } provider.BuildUDPRouterConfiguration(ctxContainer, confFromLabel.UDP) } if tcpOrUDP && len(confFromLabel.HTTP.Routers) == 0 && len(confFromLabel.HTTP.Middlewares) == 0 && len(confFromLabel.HTTP.Services) == 0 { configurations[instanceName] = confFromLabel continue } err = p.buildServiceConfiguration(ctxContainer, instance, confFromLabel.HTTP) if err != nil { logger.Error(err) continue } serviceName := getServiceName(instance) model := struct { Name string Labels map[string]string }{ Name: serviceName, Labels: instance.Labels, } provider.BuildRouterConfiguration(ctx, confFromLabel.HTTP, serviceName, p.defaultRuleTpl, model) configurations[instanceName] = confFromLabel } return provider.Merge(ctx, configurations) } func (p *Provider) buildTCPServiceConfiguration(instance ecsInstance, configuration *dynamic.TCPConfiguration) error { serviceName := getServiceName(instance) if len(configuration.Services) == 0 { configuration.Services = make(map[string]*dynamic.TCPService) lb := &dynamic.TCPServersLoadBalancer{} lb.SetDefaults() configuration.Services[serviceName] = &dynamic.TCPService{ LoadBalancer: lb, } } for name, service := range configuration.Services { err := p.addServerTCP(instance, service.LoadBalancer) if err != nil { return fmt.Errorf("service %q error: %w", name, err) } } return nil } func (p *Provider) buildUDPServiceConfiguration(instance ecsInstance, configuration *dynamic.UDPConfiguration) error { serviceName := getServiceName(instance) if len(configuration.Services) == 0 { configuration.Services = make(map[string]*dynamic.UDPService) lb := &dynamic.UDPServersLoadBalancer{} configuration.Services[serviceName] = &dynamic.UDPService{ LoadBalancer: lb, } } for name, service := range configuration.Services { err := p.addServerUDP(instance, service.LoadBalancer) if err != nil { return fmt.Errorf("service %q error: %w", name, err) } } return nil } func (p *Provider) buildServiceConfiguration(_ context.Context, instance ecsInstance, configuration *dynamic.HTTPConfiguration) error { serviceName := getServiceName(instance) if len(configuration.Services) == 0 { configuration.Services = make(map[string]*dynamic.Service) lb := &dynamic.ServersLoadBalancer{} lb.SetDefaults() configuration.Services[serviceName] = &dynamic.Service{ LoadBalancer: lb, } } for name, service := range configuration.Services { err := p.addServer(instance, service.LoadBalancer) if err != nil { return fmt.Errorf("service %q error: %w", name, err) } } return nil } func (p *Provider) filterInstance(ctx context.Context, instance ecsInstance) bool { logger := log.FromContext(ctx) if instance.machine == nil { logger.Debug("Filtering ecs instance with nil machine") return false } if strings.ToLower(instance.machine.state) != ec2.InstanceStateNameRunning { logger.Debugf("Filtering ecs instance with an incorrect state %s (%s) (state = %s)", instance.Name, instance.ID, instance.machine.state) return false } if instance.machine.healthStatus == "UNHEALTHY" { logger.Debugf("Filtering unhealthy ecs instance %s (%s)", instance.Name, instance.ID) return false } if len(instance.machine.privateIP) == 0 { logger.Debugf("Filtering ecs instance without an ip address %s (%s)", instance.Name, instance.ID) return false } if !instance.ExtraConf.Enable { logger.Debugf("Filtering disabled ecs instance %s (%s)", instance.Name, instance.ID) return false } matches, err := constraints.MatchLabels(instance.Labels, p.Constraints) if err != nil { logger.Errorf("Error matching constraint expression: %v", err) return false } if !matches { logger.Debugf("Container pruned by constraint expression: %q", p.Constraints) return false } return true } func (p *Provider) addServerTCP(instance ecsInstance, loadBalancer *dynamic.TCPServersLoadBalancer) error { if loadBalancer == nil { return errors.New("load-balancer is not defined") } if len(loadBalancer.Servers) == 0 { loadBalancer.Servers = []dynamic.TCPServer{{}} } serverPort := loadBalancer.Servers[0].Port loadBalancer.Servers[0].Port = "" ip, port, err := p.getIPPort(instance, serverPort) if err != nil { return err } if port == "" { return errors.New("port is missing") } loadBalancer.Servers[0].Address = net.JoinHostPort(ip, port) return nil } func (p *Provider) addServerUDP(instance ecsInstance, loadBalancer *dynamic.UDPServersLoadBalancer) error { if loadBalancer == nil { return errors.New("load-balancer is not defined") } if len(loadBalancer.Servers) == 0 { loadBalancer.Servers = []dynamic.UDPServer{{}} } serverPort := loadBalancer.Servers[0].Port loadBalancer.Servers[0].Port = "" ip, port, err := p.getIPPort(instance, serverPort) if err != nil { return err } if port == "" { return errors.New("port is missing") } loadBalancer.Servers[0].Address = net.JoinHostPort(ip, port) return nil } func (p *Provider) addServer(instance ecsInstance, 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} } serverPort := loadBalancer.Servers[0].Port loadBalancer.Servers[0].Port = "" ip, port, err := p.getIPPort(instance, serverPort) if err != nil { return err } if port == "" { return errors.New("port is missing") } loadBalancer.Servers[0].URL = fmt.Sprintf("%s://%s", loadBalancer.Servers[0].Scheme, net.JoinHostPort(ip, port)) loadBalancer.Servers[0].Scheme = "" return nil } func (p *Provider) getIPPort(instance ecsInstance, serverPort string) (string, string, error) { var ip, port string ip = instance.machine.privateIP port = getPort(instance, serverPort) if len(ip) == 0 { return "", "", fmt.Errorf("unable to find the IP address for the instance %q: the server is ignored", instance.Name) } return ip, port, nil } func getPort(instance ecsInstance, serverPort string) string { if len(serverPort) > 0 { for _, port := range instance.machine.ports { containerPort := strconv.FormatInt(port.containerPort, 10) if serverPort == containerPort { return strconv.FormatInt(port.hostPort, 10) } } return serverPort } var ports []nat.Port for _, port := range instance.machine.ports { natPort, err := nat.NewPort(port.protocol, strconv.FormatInt(port.hostPort, 10)) if err != nil { continue } ports = append(ports, natPort) } less := func(i, j nat.Port) bool { return i.Int() < j.Int() } nat.Sort(ports, less) if len(ports) > 0 { min := ports[0] return min.Port() } return "" } func getServiceName(instance ecsInstance) string { return provider.Normalize(instance.Name) }