276 lines
12 KiB
Go
276 lines
12 KiB
Go
package docker
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import (
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"errors"
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"strconv"
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"strings"
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"github.com/containous/traefik/provider"
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"github.com/containous/traefik/provider/label"
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"github.com/containous/traefik/types"
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)
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// Specific functions
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// Extract rule from labels for a given service and a given docker container
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func (p Provider) getServiceFrontendRule(container dockerData, serviceName string) string {
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if value, ok := getServiceLabels(container, serviceName)[label.SuffixFrontendRule]; ok {
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return value
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}
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return p.getFrontendRule(container)
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}
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// Check if for the given container, we find labels that are defining services
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func hasServices(container dockerData) bool {
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return len(label.ExtractServiceProperties(container.Labels)) > 0
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}
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// Gets array of service names for a given container
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func getServiceNames(container dockerData) []string {
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labelServiceProperties := label.ExtractServiceProperties(container.Labels)
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keys := make([]string, 0, len(labelServiceProperties))
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for k := range labelServiceProperties {
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keys = append(keys, k)
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}
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return keys
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}
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// checkServiceLabelPort checks if all service names have a port service label
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// or if port container label exists for default value
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func checkServiceLabelPort(container dockerData) error {
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// If port container label is present, there is a default values for all ports, use it for the check
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_, err := strconv.Atoi(container.Labels[label.TraefikPort])
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if err != nil {
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serviceLabelPorts := make(map[string]struct{})
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serviceLabels := make(map[string]struct{})
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for lbl := range container.Labels {
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// Get all port service labels
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portLabel := extractServicePort(lbl)
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if len(portLabel) > 0 {
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serviceLabelPorts[portLabel[0]] = struct{}{}
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}
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// Get only one instance of all service names from service labels
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servicesLabelNames := label.FindServiceSubmatch(lbl)
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if len(servicesLabelNames) > 0 {
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serviceLabels[strings.Split(servicesLabelNames[0], ".")[1]] = struct{}{}
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}
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}
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// If the number of service labels is different than the number of port services label
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// there is an error
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if len(serviceLabels) == len(serviceLabelPorts) {
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for labelPort := range serviceLabelPorts {
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_, err = strconv.Atoi(container.Labels[labelPort])
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if err != nil {
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break
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}
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}
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} else {
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err = errors.New("port service labels missing, please use traefik.port as default value or define all port service labels")
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}
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}
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return err
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}
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func extractServicePort(labelName string) []string {
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if strings.HasPrefix(labelName, label.TraefikFrontend+".") ||
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strings.HasPrefix(labelName, label.TraefikBackend+".") {
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return nil
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}
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return label.PortRegexp.FindStringSubmatch(labelName)
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}
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// Extract backend from labels for a given service and a given docker container
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func getServiceBackendName(container dockerData, serviceName string) string {
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if value, ok := getServiceLabels(container, serviceName)[label.SuffixFrontendBackend]; ok {
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return provider.Normalize(container.ServiceName + "-" + value)
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}
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return provider.Normalize(container.ServiceName + "-" + getBackendName(container) + "-" + serviceName)
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}
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// Extract port from labels for a given service and a given docker container
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func getServicePort(container dockerData, serviceName string) string {
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if value, ok := getServiceLabels(container, serviceName)[label.SuffixPort]; ok {
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return value
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}
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return getPort(container)
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}
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func getServiceRedirect(container dockerData, serviceName string) *types.Redirect {
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serviceLabels := getServiceLabels(container, serviceName)
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permanent := getServiceBoolValue(container, serviceLabels, label.SuffixFrontendRedirectPermanent, false)
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if hasStrictServiceLabel(serviceLabels, label.SuffixFrontendRedirectEntryPoint) {
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return &types.Redirect{
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EntryPoint: getStrictServiceStringValue(serviceLabels, label.SuffixFrontendRedirectEntryPoint, label.DefaultFrontendRedirectEntryPoint),
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Permanent: permanent,
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}
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}
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if hasStrictServiceLabel(serviceLabels, label.SuffixFrontendRedirectRegex) &&
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hasStrictServiceLabel(serviceLabels, label.SuffixFrontendRedirectReplacement) {
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return &types.Redirect{
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Regex: getStrictServiceStringValue(serviceLabels, label.SuffixFrontendRedirectRegex, ""),
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Replacement: getStrictServiceStringValue(serviceLabels, label.SuffixFrontendRedirectReplacement, ""),
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Permanent: permanent,
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}
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}
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return getRedirect(container)
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}
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func getServiceErrorPages(container dockerData, serviceName string) map[string]*types.ErrorPage {
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serviceLabels := getServiceLabels(container, serviceName)
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if label.HasPrefix(serviceLabels, label.BaseFrontendErrorPage) {
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return label.ParseErrorPages(serviceLabels, label.BaseFrontendErrorPage, label.RegexpBaseFrontendErrorPage)
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}
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return getErrorPages(container)
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}
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func getServiceRateLimit(container dockerData, serviceName string) *types.RateLimit {
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serviceLabels := getServiceLabels(container, serviceName)
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if hasStrictServiceLabel(serviceLabels, label.SuffixFrontendRateLimitExtractorFunc) {
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extractorFunc := getStrictServiceStringValue(serviceLabels, label.SuffixFrontendRateLimitExtractorFunc, label.DefaultBackendMaxconnExtractorFunc)
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return &types.RateLimit{
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ExtractorFunc: extractorFunc,
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RateSet: label.ParseRateSets(serviceLabels, label.BaseFrontendRateLimit, label.RegexpBaseFrontendRateLimit),
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}
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}
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return getRateLimit(container)
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}
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func getServiceHeaders(container dockerData, serviceName string) *types.Headers {
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serviceLabels := getServiceLabels(container, serviceName)
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headers := &types.Headers{
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CustomRequestHeaders: getServiceMapValue(container, serviceLabels, serviceName, label.SuffixFrontendRequestHeaders),
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CustomResponseHeaders: getServiceMapValue(container, serviceLabels, serviceName, label.SuffixFrontendResponseHeaders),
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SSLProxyHeaders: getServiceMapValue(container, serviceLabels, serviceName, label.SuffixFrontendHeadersSSLProxyHeaders),
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AllowedHosts: getServiceSliceValue(container, serviceLabels, label.SuffixFrontendHeadersAllowedHosts),
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HostsProxyHeaders: getServiceSliceValue(container, serviceLabels, label.SuffixFrontendHeadersHostsProxyHeaders),
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STSSeconds: getServiceInt64Value(container, serviceLabels, label.SuffixFrontendHeadersSTSSeconds, 0),
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SSLRedirect: getServiceBoolValue(container, serviceLabels, label.SuffixFrontendHeadersSSLRedirect, false),
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SSLTemporaryRedirect: getServiceBoolValue(container, serviceLabels, label.SuffixFrontendHeadersSSLTemporaryRedirect, false),
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STSIncludeSubdomains: getServiceBoolValue(container, serviceLabels, label.SuffixFrontendHeadersSTSIncludeSubdomains, false),
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STSPreload: getServiceBoolValue(container, serviceLabels, label.SuffixFrontendHeadersSTSPreload, false),
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ForceSTSHeader: getServiceBoolValue(container, serviceLabels, label.SuffixFrontendHeadersForceSTSHeader, false),
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FrameDeny: getServiceBoolValue(container, serviceLabels, label.SuffixFrontendHeadersFrameDeny, false),
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ContentTypeNosniff: getServiceBoolValue(container, serviceLabels, label.SuffixFrontendHeadersContentTypeNosniff, false),
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BrowserXSSFilter: getServiceBoolValue(container, serviceLabels, label.SuffixFrontendHeadersBrowserXSSFilter, false),
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IsDevelopment: getServiceBoolValue(container, serviceLabels, label.SuffixFrontendHeadersIsDevelopment, false),
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SSLHost: getServiceStringValue(container, serviceLabels, label.SuffixFrontendHeadersSSLHost, ""),
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CustomFrameOptionsValue: getServiceStringValue(container, serviceLabels, label.SuffixFrontendHeadersCustomFrameOptionsValue, ""),
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ContentSecurityPolicy: getServiceStringValue(container, serviceLabels, label.SuffixFrontendHeadersContentSecurityPolicy, ""),
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PublicKey: getServiceStringValue(container, serviceLabels, label.SuffixFrontendHeadersPublicKey, ""),
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ReferrerPolicy: getServiceStringValue(container, serviceLabels, label.SuffixFrontendHeadersReferrerPolicy, ""),
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}
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if !headers.HasSecureHeadersDefined() && !headers.HasCustomHeadersDefined() {
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return nil
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}
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return headers
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}
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// Service label functions
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func getFuncServiceSliceStringLabel(labelSuffix string) func(container dockerData, serviceName string) []string {
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return func(container dockerData, serviceName string) []string {
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serviceLabels := getServiceLabels(container, serviceName)
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return getServiceSliceValue(container, serviceLabels, labelSuffix)
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}
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}
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func getFuncServiceStringLabel(labelSuffix string, defaultValue string) func(container dockerData, serviceName string) string {
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return func(container dockerData, serviceName string) string {
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serviceLabels := getServiceLabels(container, serviceName)
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return getServiceStringValue(container, serviceLabels, labelSuffix, defaultValue)
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}
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}
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func getFuncServiceBoolLabel(labelSuffix string, defaultValue bool) func(container dockerData, serviceName string) bool {
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return func(container dockerData, serviceName string) bool {
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serviceLabels := getServiceLabels(container, serviceName)
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return getServiceBoolValue(container, serviceLabels, labelSuffix, defaultValue)
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}
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}
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func getFuncServiceIntLabel(labelSuffix string, defaultValue int) func(container dockerData, serviceName string) int {
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return func(container dockerData, serviceName string) int {
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return getServiceIntLabel(container, serviceName, labelSuffix, defaultValue)
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}
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}
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func hasStrictServiceLabel(serviceLabels map[string]string, labelSuffix string) bool {
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value, ok := serviceLabels[labelSuffix]
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return ok && len(value) > 0
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}
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func getServiceStringValue(container dockerData, serviceLabels map[string]string, labelSuffix string, defaultValue string) string {
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if value, ok := serviceLabels[labelSuffix]; ok {
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return value
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}
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return label.GetStringValue(container.Labels, label.Prefix+labelSuffix, defaultValue)
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}
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func getStrictServiceStringValue(serviceLabels map[string]string, labelSuffix string, defaultValue string) string {
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if value, ok := serviceLabels[labelSuffix]; ok {
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return value
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}
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return defaultValue
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}
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func getServiceMapValue(container dockerData, serviceLabels map[string]string, serviceName string, labelSuffix string) map[string]string {
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if value, ok := serviceLabels[labelSuffix]; ok {
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lblName := label.GetServiceLabel(labelSuffix, serviceName)
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return label.ParseMapValue(lblName, value)
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}
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return label.GetMapValue(container.Labels, label.Prefix+labelSuffix)
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}
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func getServiceSliceValue(container dockerData, serviceLabels map[string]string, labelSuffix string) []string {
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if value, ok := serviceLabels[labelSuffix]; ok {
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return label.SplitAndTrimString(value, ",")
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}
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return label.GetSliceStringValue(container.Labels, label.Prefix+labelSuffix)
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}
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func getServiceBoolValue(container dockerData, serviceLabels map[string]string, labelSuffix string, defaultValue bool) bool {
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if rawValue, ok := serviceLabels[labelSuffix]; ok {
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value, err := strconv.ParseBool(rawValue)
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if err == nil {
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return value
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}
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}
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return label.GetBoolValue(container.Labels, label.Prefix+labelSuffix, defaultValue)
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}
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func getServiceIntLabel(container dockerData, serviceName string, labelSuffix string, defaultValue int) int {
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if rawValue, ok := getServiceLabels(container, serviceName)[labelSuffix]; ok {
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value, err := strconv.Atoi(rawValue)
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if err == nil {
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return value
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}
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}
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return label.GetIntValue(container.Labels, label.Prefix+labelSuffix, defaultValue)
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}
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func getServiceInt64Value(container dockerData, serviceLabels map[string]string, labelSuffix string, defaultValue int64) int64 {
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if rawValue, ok := serviceLabels[labelSuffix]; ok {
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value, err := strconv.ParseInt(rawValue, 10, 64)
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if err == nil {
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return value
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}
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}
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return label.GetInt64Value(container.Labels, label.Prefix+labelSuffix, defaultValue)
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}
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func getServiceLabels(container dockerData, serviceName string) label.ServicePropertyValues {
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return label.ExtractServiceProperties(container.Labels)[serviceName]
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}
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