package docker import ( "context" "io" "math" "net" "net/http" "regexp" "strconv" "strings" "text/template" "time" "github.com/BurntSushi/ty/fun" "github.com/cenk/backoff" "github.com/containous/traefik/job" "github.com/containous/traefik/log" "github.com/containous/traefik/provider" "github.com/containous/traefik/safe" "github.com/containous/traefik/types" "github.com/containous/traefik/version" dockertypes "github.com/docker/docker/api/types" dockercontainertypes "github.com/docker/docker/api/types/container" eventtypes "github.com/docker/docker/api/types/events" "github.com/docker/docker/api/types/filters" swarmtypes "github.com/docker/docker/api/types/swarm" "github.com/docker/docker/api/types/versions" "github.com/docker/docker/client" "github.com/docker/go-connections/nat" "github.com/docker/go-connections/sockets" "github.com/pkg/errors" ) const ( // SwarmAPIVersion is a constant holding the version of the Provider API traefik will use SwarmAPIVersion = "1.24" // SwarmDefaultWatchTime is the duration of the interval when polling docker SwarmDefaultWatchTime = 15 * time.Second defaultWeight = "0" defaultProtocol = "http" defaultPassHostHeader = "true" defaultFrontendPriority = "0" defaultCircuitBreakerExpression = "NetworkErrorRatio() > 1" defaultFrontendRedirectEntryPoint = "" defaultBackendLoadBalancerMethod = "wrr" defaultBackendMaxconnExtractorfunc = "request.host" ) var _ provider.Provider = (*Provider)(nil) // Provider holds configurations of the provider. type Provider struct { provider.BaseProvider `mapstructure:",squash" export:"true"` Endpoint string `description:"Docker server endpoint. Can be a tcp or a unix socket endpoint"` Domain string `description:"Default domain used"` TLS *types.ClientTLS `description:"Enable Docker TLS support" export:"true"` ExposedByDefault bool `description:"Expose containers by default" export:"true"` UseBindPortIP bool `description:"Use the ip address from the bound port, rather than from the inner network" export:"true"` SwarmMode bool `description:"Use Docker on Swarm Mode" export:"true"` } // dockerData holds the need data to the Provider p type dockerData struct { ServiceName string Name string Labels map[string]string // List of labels set to container or service NetworkSettings networkSettings Health string Node *dockertypes.ContainerNode } // NetworkSettings holds the networks data to the Provider p type networkSettings struct { NetworkMode dockercontainertypes.NetworkMode Ports nat.PortMap Networks map[string]*networkData } // Network holds the network data to the Provider p type networkData struct { Name string Addr string Port int Protocol string ID string } func (p *Provider) createClient() (client.APIClient, error) { var httpClient *http.Client if p.TLS != nil { config, err := p.TLS.CreateTLSConfig() if err != nil { return nil, err } tr := &http.Transport{ TLSClientConfig: config, } proto, addr, _, err := client.ParseHost(p.Endpoint) if err != nil { return nil, err } sockets.ConfigureTransport(tr, proto, addr) httpClient = &http.Client{ Transport: tr, } } httpHeaders := map[string]string{ "User-Agent": "Traefik " + version.Version, } var apiVersion string if p.SwarmMode { apiVersion = SwarmAPIVersion } else { apiVersion = DockerAPIVersion } return client.NewClient(p.Endpoint, apiVersion, httpClient, httpHeaders) } // Provide allows the docker provider to provide configurations to traefik // using the given configuration channel. func (p *Provider) Provide(configurationChan chan<- types.ConfigMessage, pool *safe.Pool, constraints types.Constraints) error { p.Constraints = append(p.Constraints, constraints...) // TODO register this routine in pool, and watch for stop channel safe.Go(func() { operation := func() error { var err error dockerClient, err := p.createClient() if err != nil { log.Errorf("Failed to create a client for docker, error: %s", err) return err } ctx := context.Background() serverVersion, err := dockerClient.ServerVersion(ctx) if err != nil { log.Errorf("Failed to retrieve information of the docker client and server host: %s", err) return err } log.Debugf("Provider connection established with docker %s (API %s)", serverVersion.Version, serverVersion.APIVersion) var dockerDataList []dockerData if p.SwarmMode { dockerDataList, err = listServices(ctx, dockerClient) if err != nil { log.Errorf("Failed to list services for docker swarm mode, error %s", err) return err } } else { dockerDataList, err = listContainers(ctx, dockerClient) if err != nil { log.Errorf("Failed to list containers for docker, error %s", err) return err } } configuration := p.loadDockerConfig(dockerDataList) configurationChan <- types.ConfigMessage{ ProviderName: "docker", Configuration: configuration, } if p.Watch { ctx, cancel := context.WithCancel(ctx) if p.SwarmMode { errChan := make(chan error) // TODO: This need to be change. Linked to Swarm events docker/docker#23827 ticker := time.NewTicker(SwarmDefaultWatchTime) pool.Go(func(stop chan bool) { defer close(errChan) for { select { case <-ticker.C: services, err := listServices(ctx, dockerClient) if err != nil { log.Errorf("Failed to list services for docker, error %s", err) errChan <- err return } configuration := p.loadDockerConfig(services) if configuration != nil { configurationChan <- types.ConfigMessage{ ProviderName: "docker", Configuration: configuration, } } case <-stop: ticker.Stop() cancel() return } } }) if err, ok := <-errChan; ok { return err } // channel closed } else { pool.Go(func(stop chan bool) { for { select { case <-stop: cancel() return } } }) f := filters.NewArgs() f.Add("type", "container") options := dockertypes.EventsOptions{ Filters: f, } startStopHandle := func(m eventtypes.Message) { log.Debugf("Provider event received %+v", m) containers, err := listContainers(ctx, dockerClient) if err != nil { log.Errorf("Failed to list containers for docker, error %s", err) // Call cancel to get out of the monitor cancel() return } configuration := p.loadDockerConfig(containers) if configuration != nil { configurationChan <- types.ConfigMessage{ ProviderName: "docker", Configuration: configuration, } } } eventsc, errc := dockerClient.Events(ctx, options) for { select { case event := <-eventsc: if event.Action == "start" || event.Action == "die" || strings.HasPrefix(event.Action, "health_status") { startStopHandle(event) } case err := <-errc: if err == io.EOF { log.Debug("Provider event stream closed") } return err } } } } return nil } notify := func(err error, time time.Duration) { log.Errorf("Provider connection error %+v, retrying in %s", err, time) } err := backoff.RetryNotify(safe.OperationWithRecover(operation), job.NewBackOff(backoff.NewExponentialBackOff()), notify) if err != nil { log.Errorf("Cannot connect to docker server %+v", err) } }) return nil } func (p *Provider) loadDockerConfig(containersInspected []dockerData) *types.Configuration { var DockerFuncMap = template.FuncMap{ "getBackend": getBackend, "getIPAddress": p.getIPAddress, "getPort": getPort, "getWeight": getFuncStringLabel(types.LabelWeight, defaultWeight), "getDomain": getFuncStringLabel(types.LabelDomain, p.Domain), "getProtocol": getFuncStringLabel(types.LabelProtocol, defaultProtocol), "getPassHostHeader": getFuncStringLabel(types.LabelFrontendPassHostHeader, defaultPassHostHeader), "getPriority": getFuncStringLabel(types.LabelFrontendPriority, defaultFrontendPriority), "getEntryPoints": getFuncSliceStringLabel(types.LabelFrontendEntryPoints), "getBasicAuth": getFuncSliceStringLabel(types.LabelFrontendAuthBasic), "getFrontendRule": p.getFrontendRule, "hasCircuitBreakerLabel": hasLabel(types.LabelBackendCircuitbreakerExpression), "getCircuitBreakerExpression": getFuncStringLabel(types.LabelBackendCircuitbreakerExpression, defaultCircuitBreakerExpression), "hasLoadBalancerLabel": hasLoadBalancerLabel, "getLoadBalancerMethod": getFuncStringLabel(types.LabelBackendLoadbalancerMethod, defaultBackendLoadBalancerMethod), "hasMaxConnLabels": hasMaxConnLabels, "getMaxConnAmount": getFuncInt64Label(types.LabelBackendMaxconnAmount, math.MaxInt64), "getMaxConnExtractorFunc": getFuncStringLabel(types.LabelBackendMaxconnExtractorfunc, defaultBackendMaxconnExtractorfunc), "getSticky": getSticky, "hasStickinessLabel": hasStickinessLabel, "getStickinessCookieName": getFuncStringLabel(types.LabelBackendLoadbalancerStickinessCookieName, ""), "getIsBackendLBSwarm": getIsBackendLBSwarm, "getServiceBackend": getServiceBackend, "getWhitelistSourceRange": getFuncSliceStringLabel(types.LabelTraefikFrontendWhitelistSourceRange), "hasHeaders": hasHeaders, "hasRequestHeaders": hasLabel(types.LabelFrontendRequestHeaders), "getRequestHeaders": getFuncMapLabel(types.LabelFrontendRequestHeaders), "hasResponseHeaders": hasLabel(types.LabelFrontendResponseHeaders), "getResponseHeaders": getFuncMapLabel(types.LabelFrontendResponseHeaders), "hasAllowedHostsHeaders": hasLabel(types.LabelFrontendAllowedHosts), "getAllowedHostsHeaders": getFuncSliceStringLabel(types.LabelFrontendAllowedHosts), "hasHostsProxyHeaders": hasLabel(types.LabelFrontendHostsProxyHeaders), "getHostsProxyHeaders": getFuncSliceStringLabel(types.LabelFrontendHostsProxyHeaders), "hasSSLRedirectHeaders": hasLabel(types.LabelFrontendSSLRedirect), "getSSLRedirectHeaders": getFuncBoolLabel(types.LabelFrontendSSLRedirect), "hasSSLTemporaryRedirectHeaders": hasLabel(types.LabelFrontendSSLTemporaryRedirect), "getSSLTemporaryRedirectHeaders": getFuncBoolLabel(types.LabelFrontendSSLTemporaryRedirect), "hasSSLHostHeaders": hasLabel(types.LabelFrontendSSLHost), "getSSLHostHeaders": getFuncStringLabel(types.LabelFrontendSSLHost, ""), "hasSSLProxyHeaders": hasLabel(types.LabelFrontendSSLProxyHeaders), "getSSLProxyHeaders": getFuncMapLabel(types.LabelFrontendSSLProxyHeaders), "hasSTSSecondsHeaders": hasLabel(types.LabelFrontendSTSSeconds), "getSTSSecondsHeaders": getFuncInt64Label(types.LabelFrontendSTSSeconds, 0), "hasSTSIncludeSubdomainsHeaders": hasLabel(types.LabelFrontendSTSIncludeSubdomains), "getSTSIncludeSubdomainsHeaders": getFuncBoolLabel(types.LabelFrontendSTSIncludeSubdomains), "hasSTSPreloadHeaders": hasLabel(types.LabelFrontendSTSPreload), "getSTSPreloadHeaders": getFuncBoolLabel(types.LabelFrontendSTSPreload), "hasForceSTSHeaderHeaders": hasLabel(types.LabelFrontendForceSTSHeader), "getForceSTSHeaderHeaders": getFuncBoolLabel(types.LabelFrontendForceSTSHeader), "hasFrameDenyHeaders": hasLabel(types.LabelFrontendFrameDeny), "getFrameDenyHeaders": getFuncBoolLabel(types.LabelFrontendFrameDeny), "hasCustomFrameOptionsValueHeaders": hasLabel(types.LabelFrontendCustomFrameOptionsValue), "getCustomFrameOptionsValueHeaders": getFuncStringLabel(types.LabelFrontendCustomFrameOptionsValue, ""), "hasContentTypeNosniffHeaders": hasLabel(types.LabelFrontendContentTypeNosniff), "getContentTypeNosniffHeaders": getFuncBoolLabel(types.LabelFrontendContentTypeNosniff), "hasBrowserXSSFilterHeaders": hasLabel(types.LabelFrontendBrowserXSSFilter), "getBrowserXSSFilterHeaders": getFuncBoolLabel(types.LabelFrontendBrowserXSSFilter), "hasContentSecurityPolicyHeaders": hasLabel(types.LabelFrontendContentSecurityPolicy), "getContentSecurityPolicyHeaders": getFuncStringLabel(types.LabelFrontendContentSecurityPolicy, ""), "hasPublicKeyHeaders": hasLabel(types.LabelFrontendPublicKey), "getPublicKeyHeaders": getFuncStringLabel(types.LabelFrontendPublicKey, ""), "hasReferrerPolicyHeaders": hasLabel(types.LabelFrontendReferrerPolicy), "getReferrerPolicyHeaders": getFuncStringLabel(types.LabelFrontendReferrerPolicy, ""), "hasIsDevelopmentHeaders": hasLabel(types.LabelFrontendIsDevelopment), "getIsDevelopmentHeaders": getFuncBoolLabel(types.LabelFrontendIsDevelopment), "hasServices": hasServices, "getServiceNames": getServiceNames, "getServicePort": getServicePort, "getServiceWeight": getFuncServiceStringLabel(types.SuffixWeight, defaultWeight), "getServiceProtocol": getFuncServiceStringLabel(types.SuffixProtocol, defaultProtocol), "getServiceEntryPoints": getFuncServiceSliceStringLabel(types.SuffixFrontendEntryPoints), "getServiceBasicAuth": getFuncServiceSliceStringLabel(types.SuffixFrontendAuthBasic), "getServiceFrontendRule": p.getServiceFrontendRule, "getServicePassHostHeader": getFuncServiceStringLabel(types.SuffixFrontendPassHostHeader, defaultPassHostHeader), "getServicePriority": getFuncServiceStringLabel(types.SuffixFrontendPriority, defaultFrontendPriority), "hasRedirect": hasRedirect, "getRedirectEntryPoint": getFuncStringLabel(types.LabelFrontendRedirectEntryPoint, defaultFrontendRedirectEntryPoint), "getRedirectRegex": getFuncStringLabel(types.LabelFrontendRedirectRegex, ""), "getRedirectReplacement": getFuncStringLabel(types.LabelFrontendRedirectReplacement, ""), "hasServiceRedirect": hasServiceRedirect, "getServiceRedirectEntryPoint": getFuncServiceStringLabel(types.SuffixFrontendRedirectEntryPoint, defaultFrontendRedirectEntryPoint), "getServiceRedirectReplacement": getFuncServiceStringLabel(types.SuffixFrontendRedirectReplacement, ""), "getServiceRedirectRegex": getFuncServiceStringLabel(types.SuffixFrontendRedirectRegex, ""), } // filter containers filteredContainers := fun.Filter(func(container dockerData) bool { return p.containerFilter(container) }, containersInspected).([]dockerData) frontends := map[string][]dockerData{} backends := map[string]dockerData{} servers := map[string][]dockerData{} serviceNames := make(map[string]struct{}) for idx, container := range filteredContainers { if _, exists := serviceNames[container.ServiceName]; !exists { frontendName := p.getFrontendName(container, idx) frontends[frontendName] = append(frontends[frontendName], container) if len(container.ServiceName) > 0 { serviceNames[container.ServiceName] = struct{}{} } } backendName := getBackend(container) backends[backendName] = container servers[backendName] = append(servers[backendName], container) } templateObjects := struct { Containers []dockerData Frontends map[string][]dockerData Backends map[string]dockerData Servers map[string][]dockerData Domain string }{ filteredContainers, frontends, backends, servers, p.Domain, } configuration, err := p.GetConfiguration("templates/docker.tmpl", DockerFuncMap, templateObjects) if err != nil { log.Error(err) } return configuration } // Regexp used to extract the name of the service and the name of the property for this service // All properties are under the format traefik..frontent.*= except the port/weight/protocol directly after traefik.. var servicesPropertiesRegexp = regexp.MustCompile(`^traefik\.(?P.+?)\.(?Pport|weight|protocol|frontend\.(.*))$`) // Check if for the given container, we find labels that are defining services func hasServices(container dockerData) bool { return len(extractServicesLabels(container.Labels)) > 0 } // Gets array of service names for a given container func getServiceNames(container dockerData) []string { labelServiceProperties := extractServicesLabels(container.Labels) keys := make([]string, 0, len(labelServiceProperties)) for k := range labelServiceProperties { keys = append(keys, k) } return keys } // Extract backend from labels for a given service and a given docker container func getServiceBackend(container dockerData, serviceName string) string { if value, ok := getContainerServiceLabel(container, serviceName, types.SuffixFrontendBackend); ok { return provider.Normalize(container.ServiceName + "-" + value) } return provider.Normalize(container.ServiceName + "-" + getBackend(container) + "-" + serviceName) } // Extract rule from labels for a given service and a given docker container func (p Provider) getServiceFrontendRule(container dockerData, serviceName string) string { if value, ok := getContainerServiceLabel(container, serviceName, types.SuffixFrontendRule); ok { return value } return p.getFrontendRule(container) } // Extract port from labels for a given service and a given docker container func getServicePort(container dockerData, serviceName string) string { if value, ok := getContainerServiceLabel(container, serviceName, types.SuffixPort); ok { return value } return getPort(container) } func hasLoadBalancerLabel(container dockerData) bool { _, errMethod := getLabel(container, types.LabelBackendLoadbalancerMethod) _, errSticky := getLabel(container, types.LabelBackendLoadbalancerSticky) _, errStickiness := getLabel(container, types.LabelBackendLoadbalancerStickiness) _, errCookieName := getLabel(container, types.LabelBackendLoadbalancerStickinessCookieName) return errMethod == nil || errSticky == nil || errStickiness == nil || errCookieName == nil } func hasMaxConnLabels(container dockerData) bool { if _, err := getLabel(container, types.LabelBackendMaxconnAmount); err != nil { return false } if _, err := getLabel(container, types.LabelBackendMaxconnExtractorfunc); err != nil { return false } return true } func (p Provider) containerFilter(container dockerData) bool { if !isContainerEnabled(container, p.ExposedByDefault) { log.Debugf("Filtering disabled container %s", container.Name) return false } var err error portLabel := "traefik.port label" if hasServices(container) { portLabel = "traefik..port or " + portLabel + "s" err = checkServiceLabelPort(container) } else { _, err = strconv.Atoi(container.Labels[types.LabelPort]) } if len(container.NetworkSettings.Ports) == 0 && err != nil { log.Debugf("Filtering container without port and no %s %s : %s", portLabel, container.Name, err.Error()) return false } constraintTags := strings.Split(container.Labels[types.LabelTags], ",") if ok, failingConstraint := p.MatchConstraints(constraintTags); !ok { if failingConstraint != nil { log.Debugf("Container %v pruned by '%v' constraint", container.Name, failingConstraint.String()) } return false } if container.Health != "" && container.Health != "healthy" { log.Debugf("Filtering unhealthy or starting container %s", container.Name) return false } if len(p.getFrontendRule(container)) == 0 { log.Debugf("Filtering container with empty frontend rule %s", container.Name) return false } return true } // checkServiceLabelPort checks if all service names have a port service label // or if port container label exists for default value func checkServiceLabelPort(container dockerData) error { // If port container label is present, there is a default values for all ports, use it for the check _, err := strconv.Atoi(container.Labels[types.LabelPort]) if err != nil { serviceLabelPorts := make(map[string]struct{}) serviceLabels := make(map[string]struct{}) portRegexp := regexp.MustCompile(`^traefik\.(?P.+?)\.port$`) for label := range container.Labels { // Get all port service labels portLabel := portRegexp.FindStringSubmatch(label) if portLabel != nil && len(portLabel) > 0 { serviceLabelPorts[portLabel[0]] = struct{}{} } // Get only one instance of all service names from service labels servicesLabelNames := servicesPropertiesRegexp.FindStringSubmatch(label) if servicesLabelNames != nil && len(servicesLabelNames) > 0 { serviceLabels[strings.Split(servicesLabelNames[0], ".")[1]] = struct{}{} } } // If the number of service labels is different than the number of port services label // there is an error if len(serviceLabels) == len(serviceLabelPorts) { for labelPort := range serviceLabelPorts { _, err = strconv.Atoi(container.Labels[labelPort]) if err != nil { break } } } else { err = errors.New("Port service labels missing, please use traefik.port as default value or define all port service labels") } } return err } func (p Provider) getFrontendName(container dockerData, idx int) string { // Replace '.' with '-' in quoted keys because of this issue https://github.com/BurntSushi/toml/issues/78 return provider.Normalize(p.getFrontendRule(container) + "-" + strconv.Itoa(idx)) } // GetFrontendRule returns the frontend rule for the specified container, using // it's label. It returns a default one (Host) if the label is not present. func (p Provider) getFrontendRule(container dockerData) string { if label, err := getLabel(container, types.LabelFrontendRule); err == nil { return label } if labels, err := getLabels(container, []string{labelDockerComposeProject, labelDockerComposeService}); err == nil { return "Host:" + getSubDomain(labels[labelDockerComposeService]+"."+labels[labelDockerComposeProject]) + "." + p.Domain } if len(p.Domain) > 0 { return "Host:" + getSubDomain(container.ServiceName) + "." + p.Domain } return "" } func getBackend(container dockerData) string { if label, err := getLabel(container, types.LabelBackend); err == nil { return provider.Normalize(label) } if labels, err := getLabels(container, []string{labelDockerComposeProject, labelDockerComposeService}); err == nil { return provider.Normalize(labels[labelDockerComposeService] + "_" + labels[labelDockerComposeProject]) } return provider.Normalize(container.ServiceName) } func (p Provider) getIPAddress(container dockerData) string { if label, err := getLabel(container, labelDockerNetwork); err == nil && label != "" { networkSettings := container.NetworkSettings if networkSettings.Networks != nil { network := networkSettings.Networks[label] if network != nil { return network.Addr } log.Warnf("Could not find network named '%s' for container '%s'! Maybe you're missing the project's prefix in the label? Defaulting to first available network.", label, container.Name) } } if container.NetworkSettings.NetworkMode.IsHost() { if container.Node != nil { if container.Node.IPAddress != "" { return container.Node.IPAddress } } return "127.0.0.1" } if container.NetworkSettings.NetworkMode.IsContainer() { dockerClient, err := p.createClient() if err != nil { log.Warnf("Unable to get IP address for container %s, error: %s", container.Name, err) return "" } ctx := context.Background() containerInspected, err := dockerClient.ContainerInspect(ctx, container.NetworkSettings.NetworkMode.ConnectedContainer()) if err != nil { log.Warnf("Unable to get IP address for container %s : Failed to inspect container ID %s, error: %s", container.Name, container.NetworkSettings.NetworkMode.ConnectedContainer(), err) return "" } return p.getIPAddress(parseContainer(containerInspected)) } if p.UseBindPortIP { port := getPort(container) for netPort, portBindings := range container.NetworkSettings.Ports { if string(netPort) == port+"/TCP" || string(netPort) == port+"/UDP" { for _, p := range portBindings { return p.HostIP } } } } for _, network := range container.NetworkSettings.Networks { return network.Addr } return "" } func getPort(container dockerData) string { if label, err := getLabel(container, types.LabelPort); err == nil { return label } // See iteration order in https://blog.golang.org/go-maps-in-action var ports []nat.Port for port := range container.NetworkSettings.Ports { ports = append(ports, port) } 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 hasStickinessLabel(container dockerData) bool { labelStickiness, errStickiness := getLabel(container, types.LabelBackendLoadbalancerStickiness) return errStickiness == nil && len(labelStickiness) > 0 && strings.EqualFold(strings.TrimSpace(labelStickiness), "true") } // Deprecated replaced by Stickiness func getSticky(container dockerData) string { if label, err := getLabel(container, types.LabelBackendLoadbalancerSticky); err == nil { if len(label) > 0 { log.Warnf("Deprecated configuration found: %s. Please use %s.", types.LabelBackendLoadbalancerSticky, types.LabelBackendLoadbalancerStickiness) } return label } return "false" } func getIsBackendLBSwarm(container dockerData) string { return getStringLabel(container, labelBackendLoadBalancerSwarm, "false") } func isContainerEnabled(container dockerData, exposedByDefault bool) bool { return exposedByDefault && container.Labels[types.LabelEnable] != "false" || container.Labels[types.LabelEnable] == "true" } func listContainers(ctx context.Context, dockerClient client.ContainerAPIClient) ([]dockerData, error) { containerList, err := dockerClient.ContainerList(ctx, dockertypes.ContainerListOptions{}) if err != nil { return []dockerData{}, err } var containersInspected []dockerData // get inspect containers for _, container := range containerList { containerInspected, err := dockerClient.ContainerInspect(ctx, container.ID) if err != nil { log.Warnf("Failed to inspect container %s, error: %s", container.ID, err) } else { // This condition is here to avoid to have empty IP https://github.com/containous/traefik/issues/2459 // We register only container which are running if containerInspected.ContainerJSONBase != nil && containerInspected.ContainerJSONBase.State != nil && containerInspected.ContainerJSONBase.State.Running { dockerData := parseContainer(containerInspected) containersInspected = append(containersInspected, dockerData) } } } return containersInspected, nil } func parseContainer(container dockertypes.ContainerJSON) dockerData { dockerData := dockerData{ NetworkSettings: networkSettings{}, } if container.ContainerJSONBase != nil { dockerData.Name = container.ContainerJSONBase.Name dockerData.ServiceName = dockerData.Name //Default ServiceName to be the container's Name. dockerData.Node = container.ContainerJSONBase.Node if container.ContainerJSONBase.HostConfig != nil { dockerData.NetworkSettings.NetworkMode = container.ContainerJSONBase.HostConfig.NetworkMode } if container.State != nil && container.State.Health != nil { dockerData.Health = container.State.Health.Status } } if container.Config != nil && container.Config.Labels != nil { dockerData.Labels = container.Config.Labels } if container.NetworkSettings != nil { if container.NetworkSettings.Ports != nil { dockerData.NetworkSettings.Ports = container.NetworkSettings.Ports } if container.NetworkSettings.Networks != nil { dockerData.NetworkSettings.Networks = make(map[string]*networkData) for name, containerNetwork := range container.NetworkSettings.Networks { dockerData.NetworkSettings.Networks[name] = &networkData{ ID: containerNetwork.NetworkID, Name: name, Addr: containerNetwork.IPAddress, } } } } return dockerData } // Escape beginning slash "/", convert all others to dash "-", and convert underscores "_" to dash "-" func getSubDomain(name string) string { return strings.Replace(strings.Replace(strings.TrimPrefix(name, "/"), "/", "-", -1), "_", "-", -1) } func listServices(ctx context.Context, dockerClient client.APIClient) ([]dockerData, error) { serviceList, err := dockerClient.ServiceList(ctx, dockertypes.ServiceListOptions{}) if err != nil { return []dockerData{}, err } serverVersion, err := dockerClient.ServerVersion(ctx) networkListArgs := filters.NewArgs() // https://docs.docker.com/engine/api/v1.29/#tag/Network (Docker 17.06) if versions.GreaterThanOrEqualTo(serverVersion.APIVersion, "1.29") { networkListArgs.Add("scope", "swarm") } else { networkListArgs.Add("driver", "overlay") } networkList, err := dockerClient.NetworkList(ctx, dockertypes.NetworkListOptions{Filters: networkListArgs}) networkMap := make(map[string]*dockertypes.NetworkResource) if err != nil { log.Debugf("Failed to network inspect on client for docker, error: %s", err) return []dockerData{}, err } for _, network := range networkList { networkToAdd := network networkMap[network.ID] = &networkToAdd } var dockerDataList []dockerData var dockerDataListTasks []dockerData for _, service := range serviceList { dockerData := parseService(service, networkMap) if len(dockerData.NetworkSettings.Networks) > 0 { useSwarmLB, _ := strconv.ParseBool(getIsBackendLBSwarm(dockerData)) if useSwarmLB { dockerDataList = append(dockerDataList, dockerData) } else { isGlobalSvc := service.Spec.Mode.Global != nil dockerDataListTasks, err = listTasks(ctx, dockerClient, service.ID, dockerData, networkMap, isGlobalSvc) for _, dockerDataTask := range dockerDataListTasks { dockerDataList = append(dockerDataList, dockerDataTask) } } } } return dockerDataList, err } func parseService(service swarmtypes.Service, networkMap map[string]*dockertypes.NetworkResource) dockerData { dockerData := dockerData{ ServiceName: service.Spec.Annotations.Name, Name: service.Spec.Annotations.Name, Labels: service.Spec.Annotations.Labels, NetworkSettings: networkSettings{}, } if service.Spec.EndpointSpec != nil { if service.Spec.EndpointSpec.Mode == swarmtypes.ResolutionModeDNSRR { log.Warnf("Ignored endpoint-mode not supported, service name: %s", service.Spec.Annotations.Name) } else if service.Spec.EndpointSpec.Mode == swarmtypes.ResolutionModeVIP { dockerData.NetworkSettings.Networks = make(map[string]*networkData) for _, virtualIP := range service.Endpoint.VirtualIPs { networkService := networkMap[virtualIP.NetworkID] if networkService != nil { ip, _, _ := net.ParseCIDR(virtualIP.Addr) network := &networkData{ Name: networkService.Name, ID: virtualIP.NetworkID, Addr: ip.String(), } dockerData.NetworkSettings.Networks[network.Name] = network } else { log.Debugf("Network not found, id: %s", virtualIP.NetworkID) } } } } return dockerData } func listTasks(ctx context.Context, dockerClient client.APIClient, serviceID string, serviceDockerData dockerData, networkMap map[string]*dockertypes.NetworkResource, isGlobalSvc bool) ([]dockerData, error) { serviceIDFilter := filters.NewArgs() serviceIDFilter.Add("service", serviceID) serviceIDFilter.Add("desired-state", "running") taskList, err := dockerClient.TaskList(ctx, dockertypes.TaskListOptions{Filters: serviceIDFilter}) if err != nil { return []dockerData{}, err } var dockerDataList []dockerData for _, task := range taskList { if task.Status.State != swarmtypes.TaskStateRunning { continue } dockerData := parseTasks(task, serviceDockerData, networkMap, isGlobalSvc) dockerDataList = append(dockerDataList, dockerData) } return dockerDataList, err } func parseTasks(task swarmtypes.Task, serviceDockerData dockerData, networkMap map[string]*dockertypes.NetworkResource, isGlobalSvc bool) dockerData { dockerData := dockerData{ ServiceName: serviceDockerData.Name, Name: serviceDockerData.Name + "." + strconv.Itoa(task.Slot), Labels: serviceDockerData.Labels, NetworkSettings: networkSettings{}, } if isGlobalSvc { dockerData.Name = serviceDockerData.Name + "." + task.ID } if task.NetworksAttachments != nil { dockerData.NetworkSettings.Networks = make(map[string]*networkData) for _, virtualIP := range task.NetworksAttachments { if networkService, present := networkMap[virtualIP.Network.ID]; present { // Not sure about this next loop - when would a task have multiple IP's for the same network? for _, addr := range virtualIP.Addresses { ip, _, _ := net.ParseCIDR(addr) network := &networkData{ ID: virtualIP.Network.ID, Name: networkService.Name, Addr: ip.String(), } dockerData.NetworkSettings.Networks[network.Name] = network } } } } return dockerData } // TODO will be rewrite when merge on master func hasServiceRedirect(container dockerData, serviceName string) bool { serviceLabels, ok := extractServicesLabels(container.Labels)[serviceName] if !ok || len(serviceLabels) == 0 { return false } value, ok := serviceLabels[types.SuffixFrontendRedirectEntryPoint] frep := ok && len(value) > 0 value, ok = serviceLabels[types.SuffixFrontendRedirectRegex] frrg := ok && len(value) > 0 value, ok = serviceLabels[types.SuffixFrontendRedirectReplacement] frrp := ok && len(value) > 0 return frep || frrg && frrp } // TODO will be rewrite when merge on master func hasRedirect(container dockerData) bool { return hasLabel(types.LabelFrontendRedirectEntryPoint)(container) || hasLabel(types.LabelFrontendRedirectReplacement)(container) && hasLabel(types.LabelFrontendRedirectRegex)(container) } // TODO will be rewrite when merge on master func hasHeaders(container dockerData) bool { // LabelPrefix + "frontend.headers. for key := range container.Labels { if strings.HasPrefix(key, types.LabelPrefix+"frontend.headers.") { return true } } return false }