mirror of
https://github.com/traefik/traefik.git
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337 lines
8.6 KiB
Go
337 lines
8.6 KiB
Go
package ecs
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import (
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"context"
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"errors"
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"fmt"
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"net"
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"strconv"
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ec2types "github.com/aws/aws-sdk-go-v2/service/ec2/types"
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ecstypes "github.com/aws/aws-sdk-go-v2/service/ecs/types"
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"github.com/docker/go-connections/nat"
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"github.com/rs/zerolog/log"
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"github.com/traefik/traefik/v3/pkg/config/dynamic"
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"github.com/traefik/traefik/v3/pkg/config/label"
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"github.com/traefik/traefik/v3/pkg/provider"
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"github.com/traefik/traefik/v3/pkg/provider/constraints"
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)
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func (p *Provider) buildConfiguration(ctx context.Context, instances []ecsInstance) *dynamic.Configuration {
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configurations := make(map[string]*dynamic.Configuration)
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for _, instance := range instances {
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instanceName := getServiceName(instance) + "-" + instance.ID
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logger := log.Ctx(ctx).With().Str("ecs-instance", instanceName).Logger()
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ctxContainer := logger.WithContext(ctx)
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if !p.filterInstance(ctxContainer, instance) {
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continue
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}
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confFromLabel, err := label.DecodeConfiguration(instance.Labels)
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if err != nil {
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logger.Error().Err(err).Send()
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continue
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}
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var tcpOrUDP bool
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if len(confFromLabel.TCP.Routers) > 0 || len(confFromLabel.TCP.Services) > 0 {
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tcpOrUDP = true
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err := p.buildTCPServiceConfiguration(instance, confFromLabel.TCP)
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if err != nil {
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logger.Error().Err(err).Send()
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continue
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}
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provider.BuildTCPRouterConfiguration(ctxContainer, confFromLabel.TCP)
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}
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if len(confFromLabel.UDP.Routers) > 0 || len(confFromLabel.UDP.Services) > 0 {
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tcpOrUDP = true
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err := p.buildUDPServiceConfiguration(instance, confFromLabel.UDP)
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if err != nil {
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logger.Error().Err(err).Send()
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continue
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}
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provider.BuildUDPRouterConfiguration(ctxContainer, confFromLabel.UDP)
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}
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if tcpOrUDP && len(confFromLabel.HTTP.Routers) == 0 &&
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len(confFromLabel.HTTP.Middlewares) == 0 &&
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len(confFromLabel.HTTP.Services) == 0 {
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configurations[instanceName] = confFromLabel
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continue
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}
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err = p.buildServiceConfiguration(ctxContainer, instance, confFromLabel.HTTP)
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if err != nil {
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logger.Error().Err(err).Send()
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continue
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}
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serviceName := getServiceName(instance)
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model := struct {
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Name string
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Labels map[string]string
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}{
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Name: serviceName,
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Labels: instance.Labels,
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}
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provider.BuildRouterConfiguration(ctx, confFromLabel.HTTP, serviceName, p.defaultRuleTpl, model)
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configurations[instanceName] = confFromLabel
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}
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return provider.Merge(ctx, configurations)
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}
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func (p *Provider) buildTCPServiceConfiguration(instance ecsInstance, configuration *dynamic.TCPConfiguration) error {
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serviceName := getServiceName(instance)
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if len(configuration.Services) == 0 {
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configuration.Services = map[string]*dynamic.TCPService{
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serviceName: {
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LoadBalancer: new(dynamic.TCPServersLoadBalancer),
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},
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}
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}
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for name, service := range configuration.Services {
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err := p.addServerTCP(instance, service.LoadBalancer)
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if err != nil {
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return fmt.Errorf("service %q error: %w", name, err)
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}
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}
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return nil
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}
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func (p *Provider) buildUDPServiceConfiguration(instance ecsInstance, configuration *dynamic.UDPConfiguration) error {
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serviceName := getServiceName(instance)
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if len(configuration.Services) == 0 {
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configuration.Services = make(map[string]*dynamic.UDPService)
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lb := &dynamic.UDPServersLoadBalancer{}
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configuration.Services[serviceName] = &dynamic.UDPService{
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LoadBalancer: lb,
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}
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}
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for name, service := range configuration.Services {
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err := p.addServerUDP(instance, service.LoadBalancer)
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if err != nil {
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return fmt.Errorf("service %q error: %w", name, err)
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}
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}
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return nil
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}
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func (p *Provider) buildServiceConfiguration(_ context.Context, instance ecsInstance, configuration *dynamic.HTTPConfiguration) error {
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serviceName := getServiceName(instance)
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if len(configuration.Services) == 0 {
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configuration.Services = make(map[string]*dynamic.Service)
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lb := &dynamic.ServersLoadBalancer{}
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lb.SetDefaults()
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configuration.Services[serviceName] = &dynamic.Service{
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LoadBalancer: lb,
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}
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}
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for name, service := range configuration.Services {
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err := p.addServer(instance, service.LoadBalancer)
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if err != nil {
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return fmt.Errorf("service %q error: %w", name, err)
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}
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}
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return nil
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}
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func (p *Provider) filterInstance(ctx context.Context, instance ecsInstance) bool {
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logger := log.Ctx(ctx)
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if instance.machine == nil {
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logger.Debug().Msg("Filtering ecs instance with nil machine")
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return false
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}
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if instance.machine.state != ec2types.InstanceStateNameRunning {
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logger.Debug().Msgf("Filtering ecs instance with an incorrect state %s (%s) (state = %s)", instance.Name, instance.ID, instance.machine.state)
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return false
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}
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if instance.machine.healthStatus == ecstypes.HealthStatusUnhealthy {
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logger.Debug().Msgf("Filtering unhealthy ecs instance %s (%s)", instance.Name, instance.ID)
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return false
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}
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if len(instance.machine.privateIP) == 0 {
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logger.Debug().Msgf("Filtering ecs instance without an ip address %s (%s)", instance.Name, instance.ID)
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return false
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}
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if !instance.ExtraConf.Enable {
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logger.Debug().Msgf("Filtering disabled ecs instance %s (%s)", instance.Name, instance.ID)
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return false
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}
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matches, err := constraints.MatchLabels(instance.Labels, p.Constraints)
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if err != nil {
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logger.Error().Err(err).Msg("Error matching constraint expression")
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return false
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}
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if !matches {
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logger.Debug().Msgf("Container pruned by constraint expression: %q", p.Constraints)
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return false
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}
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return true
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}
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func (p *Provider) addServerTCP(instance ecsInstance, loadBalancer *dynamic.TCPServersLoadBalancer) error {
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if loadBalancer == nil {
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return errors.New("load-balancer is not defined")
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}
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if len(loadBalancer.Servers) == 0 {
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loadBalancer.Servers = []dynamic.TCPServer{{}}
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}
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serverPort := loadBalancer.Servers[0].Port
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loadBalancer.Servers[0].Port = ""
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ip, port, err := p.getIPPort(instance, serverPort)
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if err != nil {
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return err
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}
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if port == "" {
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return errors.New("port is missing")
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}
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loadBalancer.Servers[0].Address = net.JoinHostPort(ip, port)
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return nil
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}
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func (p *Provider) addServerUDP(instance ecsInstance, loadBalancer *dynamic.UDPServersLoadBalancer) error {
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if loadBalancer == nil {
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return errors.New("load-balancer is not defined")
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}
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if len(loadBalancer.Servers) == 0 {
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loadBalancer.Servers = []dynamic.UDPServer{{}}
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}
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serverPort := loadBalancer.Servers[0].Port
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loadBalancer.Servers[0].Port = ""
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ip, port, err := p.getIPPort(instance, serverPort)
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if err != nil {
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return err
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}
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if port == "" {
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return errors.New("port is missing")
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}
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loadBalancer.Servers[0].Address = net.JoinHostPort(ip, port)
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return nil
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}
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func (p *Provider) addServer(instance ecsInstance, loadBalancer *dynamic.ServersLoadBalancer) error {
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if loadBalancer == nil {
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return errors.New("load-balancer is not defined")
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}
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if len(loadBalancer.Servers) == 0 {
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loadBalancer.Servers = []dynamic.Server{{}}
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}
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if loadBalancer.Servers[0].URL != "" {
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if loadBalancer.Servers[0].Scheme != "" || loadBalancer.Servers[0].Port != "" {
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return errors.New("defining scheme or port is not allowed when URL is defined")
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}
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return nil
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}
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serverPort := loadBalancer.Servers[0].Port
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loadBalancer.Servers[0].Port = ""
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ip, port, err := p.getIPPort(instance, serverPort)
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if err != nil {
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return err
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}
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if port == "" {
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return errors.New("port is missing")
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}
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scheme := loadBalancer.Servers[0].Scheme
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loadBalancer.Servers[0].Scheme = ""
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if scheme == "" {
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scheme = "http"
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}
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loadBalancer.Servers[0].URL = fmt.Sprintf("%s://%s", scheme, net.JoinHostPort(ip, port))
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return nil
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}
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func (p *Provider) getIPPort(instance ecsInstance, serverPort string) (string, string, error) {
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var ip, port string
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ip = instance.machine.privateIP
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port = getPort(instance, serverPort)
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if len(ip) == 0 {
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return "", "", fmt.Errorf("unable to find the IP address for the instance %q: the server is ignored", instance.Name)
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}
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return ip, port, nil
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}
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func getPort(instance ecsInstance, serverPort string) string {
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if len(serverPort) > 0 {
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for _, port := range instance.machine.ports {
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containerPort := strconv.FormatInt(int64(port.containerPort), 10)
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if serverPort == containerPort {
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return strconv.FormatInt(int64(port.hostPort), 10)
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}
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}
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return serverPort
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}
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var ports []nat.Port
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for _, port := range instance.machine.ports {
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natPort, err := nat.NewPort(string(port.protocol), strconv.FormatInt(int64(port.hostPort), 10))
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if err != nil {
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continue
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}
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ports = append(ports, natPort)
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}
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less := func(i, j nat.Port) bool {
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return i.Int() < j.Int()
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}
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nat.Sort(ports, less)
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if len(ports) > 0 {
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return ports[0].Port()
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}
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return ""
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}
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func getServiceName(instance ecsInstance) string {
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return provider.Normalize(instance.Name)
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}
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