package docker import ( "context" "strconv" "strings" "github.com/containous/traefik/log" "github.com/containous/traefik/provider" "github.com/containous/traefik/provider/label" "github.com/containous/traefik/types" "github.com/docker/go-connections/nat" ) const ( labelDockerNetwork = "traefik.docker.network" labelBackendLoadBalancerSwarm = "traefik.backend.loadbalancer.swarm" labelDockerComposeProject = "com.docker.compose.project" labelDockerComposeService = "com.docker.compose.service" ) // Specific functions func (p Provider) getFrontendName(container dockerData, idx int) string { 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 value := label.GetStringValue(container.Labels, label.TraefikFrontendRule, ""); len(value) != 0 { return value } if values, err := label.GetStringMultipleStrict(container.Labels, labelDockerComposeProject, labelDockerComposeService); err == nil { return "Host:" + getSubDomain(values[labelDockerComposeService]+"."+values[labelDockerComposeProject]) + "." + p.Domain } if len(p.Domain) > 0 { return "Host:" + getSubDomain(container.ServiceName) + "." + p.Domain } return "" } func (p Provider) getIPAddress(container dockerData) string { if value := label.GetStringValue(container.Labels, labelDockerNetwork, ""); value != "" { networkSettings := container.NetworkSettings if networkSettings.Networks != nil { network := networkSettings.Networks[value] 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.", value, 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 "" } connectedContainer := container.NetworkSettings.NetworkMode.ConnectedContainer() containerInspected, err := dockerClient.ContainerInspect(context.Background(), connectedContainer) if err != nil { log.Warnf("Unable to get IP address for container %s : Failed to inspect container ID %s, error: %s", container.Name, 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 hasLoadBalancerLabel(container dockerData) bool { method := label.Has(container.Labels, label.TraefikBackendLoadBalancerMethod) sticky := label.Has(container.Labels, label.TraefikBackendLoadBalancerSticky) stickiness := label.Has(container.Labels, label.TraefikBackendLoadBalancerStickiness) cookieName := label.Has(container.Labels, label.TraefikBackendLoadBalancerStickinessCookieName) return method || sticky || stickiness || cookieName } func hasMaxConnLabels(container dockerData) bool { mca := label.Has(container.Labels, label.TraefikBackendMaxConnAmount) mcef := label.Has(container.Labels, label.TraefikBackendMaxConnExtractorFunc) return mca && mcef } func getBackend(container dockerData) string { if value := label.GetStringValue(container.Labels, label.TraefikBackend, ""); len(value) != 0 { return provider.Normalize(value) } if values, err := label.GetStringMultipleStrict(container.Labels, labelDockerComposeProject, labelDockerComposeService); err == nil { return provider.Normalize(values[labelDockerComposeService] + "_" + values[labelDockerComposeProject]) } return provider.Normalize(container.ServiceName) } func getPort(container dockerData) string { if value := label.GetStringValue(container.Labels, label.TraefikPort, ""); len(value) != 0 { return value } // 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 "" } // 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) } // TODO: Deprecated // Deprecated replaced by Stickiness func getSticky(container dockerData) string { if label.Has(container.Labels, label.TraefikBackendLoadBalancerSticky) { log.Warnf("Deprecated configuration found: %s. Please use %s.", label.TraefikBackendLoadBalancerSticky, label.TraefikBackendLoadBalancerStickiness) } return label.GetStringValue(container.Labels, label.TraefikBackendLoadBalancerSticky, "false") } func isBackendLBSwarm(container dockerData) bool { return label.GetBoolValue(container.Labels, labelBackendLoadBalancerSwarm, false) } func hasRedirect(container dockerData) bool { return label.Has(container.Labels, label.TraefikFrontendRedirectEntryPoint) || label.Has(container.Labels, label.TraefikFrontendRedirectReplacement) && label.Has(container.Labels, label.TraefikFrontendRedirectRegex) } func hasErrorPages(container dockerData) bool { return label.HasPrefix(container.Labels, label.Prefix+label.BaseFrontendErrorPage) } func getErrorPages(container dockerData) map[string]*types.ErrorPage { prefix := label.Prefix + label.BaseFrontendErrorPage return label.ParseErrorPages(container.Labels, prefix, label.RegexpFrontendErrorPage) } func getRateLimits(container dockerData) map[string]*types.Rate { prefix := label.Prefix + label.BaseFrontendRateLimit return label.ParseRateSets(container.Labels, prefix, label.RegexpFrontendRateLimit) } func hasHeaders(container dockerData) bool { for key := range container.Labels { if strings.HasPrefix(key, label.TraefikFrontendHeaders) { return true } } return false } // Label functions func getFuncInt64Label(labelName string, defaultValue int64) func(container dockerData) int64 { return func(container dockerData) int64 { return label.GetInt64Value(container.Labels, labelName, defaultValue) } } func getFuncMapLabel(labelName string) func(container dockerData) map[string]string { return func(container dockerData) map[string]string { return label.GetMapValue(container.Labels, labelName) } } func getFuncStringLabel(labelName string, defaultValue string) func(container dockerData) string { return func(container dockerData) string { return label.GetStringValue(container.Labels, labelName, defaultValue) } } func getFuncIntLabel(labelName string, defaultValue int) func(container dockerData) int { return func(container dockerData) int { return label.GetIntValue(container.Labels, labelName, defaultValue) } } func getFuncBoolLabel(labelName string, defaultValue bool) func(container dockerData) bool { return func(container dockerData) bool { return label.GetBoolValue(container.Labels, labelName, defaultValue) } } func getFuncSliceStringLabel(labelName string) func(container dockerData) []string { return func(container dockerData) []string { return label.GetSliceStringValue(container.Labels, labelName) } } func hasFunc(labelName string) func(container dockerData) bool { return func(container dockerData) bool { return label.Has(container.Labels, labelName) } }