274 lines
6.7 KiB
Go
274 lines
6.7 KiB
Go
package consulcatalog
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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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"github.com/hashicorp/consul/api"
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"github.com/traefik/traefik/v2/pkg/config/dynamic"
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"github.com/traefik/traefik/v2/pkg/config/label"
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"github.com/traefik/traefik/v2/pkg/log"
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"github.com/traefik/traefik/v2/pkg/provider"
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"github.com/traefik/traefik/v2/pkg/provider/constraints"
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)
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func (p *Provider) buildConfiguration(ctx context.Context, items []itemData) *dynamic.Configuration {
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configurations := make(map[string]*dynamic.Configuration)
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for _, item := range items {
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svcName := provider.Normalize(item.Node + "-" + item.Name + "-" + item.ID)
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ctxSvc := log.With(ctx, log.Str(log.ServiceName, svcName))
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if !p.keepContainer(ctxSvc, item) {
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continue
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}
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logger := log.FromContext(ctxSvc)
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confFromLabel, err := label.DecodeConfiguration(item.Labels)
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if err != nil {
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logger.Error(err)
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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(ctxSvc, item, confFromLabel.TCP)
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if err != nil {
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logger.Error(err)
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continue
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}
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provider.BuildTCPRouterConfiguration(ctxSvc, 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(ctxSvc, item, confFromLabel.UDP)
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if err != nil {
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logger.Error(err)
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continue
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}
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provider.BuildUDPRouterConfiguration(ctxSvc, 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[svcName] = confFromLabel
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continue
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}
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err = p.buildServiceConfiguration(ctxSvc, item, confFromLabel.HTTP)
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if err != nil {
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logger.Error(err)
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continue
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}
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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: item.Name,
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Labels: item.Labels,
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}
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provider.BuildRouterConfiguration(ctx, confFromLabel.HTTP, provider.Normalize(item.Name), p.defaultRuleTpl, model)
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configurations[svcName] = 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) keepContainer(ctx context.Context, item itemData) bool {
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logger := log.FromContext(ctx)
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if !item.ExtraConf.Enable {
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logger.Debug("Filtering disabled item")
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return false
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}
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matches, err := constraints.MatchTags(item.Tags, p.Constraints)
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if err != nil {
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logger.Errorf("Error matching constraints expression: %v", err)
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return false
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}
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if !matches {
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logger.Debugf("Container pruned by constraint expression: %q", p.Constraints)
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return false
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}
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if item.Status != api.HealthPassing && item.Status != api.HealthWarning {
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logger.Debug("Filtering unhealthy or starting item")
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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) buildTCPServiceConfiguration(ctx context.Context, item itemData, configuration *dynamic.TCPConfiguration) error {
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if len(configuration.Services) == 0 {
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configuration.Services = make(map[string]*dynamic.TCPService)
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lb := &dynamic.TCPServersLoadBalancer{}
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lb.SetDefaults()
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configuration.Services[provider.Normalize(item.Name)] = &dynamic.TCPService{
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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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ctxSvc := log.With(ctx, log.Str(log.ServiceName, name))
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err := p.addServerTCP(ctxSvc, item, service.LoadBalancer)
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if err != nil {
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return 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(ctx context.Context, item itemData, configuration *dynamic.UDPConfiguration) error {
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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[provider.Normalize(item.Name)] = &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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ctxSvc := log.With(ctx, log.Str(log.ServiceName, name))
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err := p.addServerUDP(ctxSvc, item, service.LoadBalancer)
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if err != nil {
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return 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(ctx context.Context, item itemData, configuration *dynamic.HTTPConfiguration) error {
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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[provider.Normalize(item.Name)] = &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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ctxSvc := log.With(ctx, log.Str(log.ServiceName, name))
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err := p.addServer(ctxSvc, item, service.LoadBalancer)
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if err != nil {
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return 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) addServerTCP(ctx context.Context, item itemData, 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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var port string
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if len(loadBalancer.Servers) > 0 {
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port = loadBalancer.Servers[0].Port
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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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if item.Port != "" && port == "" {
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port = item.Port
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}
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loadBalancer.Servers[0].Port = ""
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if port == "" {
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return errors.New("port is missing")
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}
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if item.Address == "" {
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return errors.New("address is missing")
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}
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loadBalancer.Servers[0].Address = net.JoinHostPort(item.Address, port)
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return nil
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}
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func (p *Provider) addServerUDP(ctx context.Context, item itemData, 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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var port string
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if item.Port != "" {
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port = item.Port
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loadBalancer.Servers[0].Port = ""
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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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if item.Address == "" {
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return errors.New("address is missing")
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}
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loadBalancer.Servers[0].Address = net.JoinHostPort(item.Address, port)
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return nil
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}
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func (p *Provider) addServer(ctx context.Context, item itemData, 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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var port string
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if len(loadBalancer.Servers) > 0 {
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port = loadBalancer.Servers[0].Port
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}
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if len(loadBalancer.Servers) == 0 {
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server := dynamic.Server{}
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server.SetDefaults()
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loadBalancer.Servers = []dynamic.Server{server}
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}
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if item.Port != "" && port == "" {
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port = item.Port
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}
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loadBalancer.Servers[0].Port = ""
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if port == "" {
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return errors.New("port is missing")
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}
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if item.Address == "" {
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return errors.New("address is missing")
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}
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loadBalancer.Servers[0].URL = fmt.Sprintf("%s://%s", loadBalancer.Servers[0].Scheme, net.JoinHostPort(item.Address, port))
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loadBalancer.Servers[0].Scheme = ""
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return nil
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}
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