575 lines
19 KiB
Go
575 lines
19 KiB
Go
package consulcatalog
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import (
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"bytes"
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"crypto/sha1"
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"encoding/base64"
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"math"
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"sort"
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"strconv"
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"strings"
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"text/template"
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"github.com/containous/traefik/log"
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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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"github.com/hashicorp/consul/api"
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)
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func (p *Provider) buildConfiguration(catalog []catalogUpdate) *types.Configuration {
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var FuncMap = template.FuncMap{
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"getAttribute": p.getAttribute,
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"getTag": getTag,
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"hasTag": hasTag,
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// Backend functions
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"getBackend": getNodeBackendName, // TODO Deprecated [breaking] getBackend -> getNodeBackendName
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"getNodeBackendName": getNodeBackendName,
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"getServiceBackendName": getServiceBackendName,
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"getBackendAddress": getBackendAddress,
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"getBackendName": getServerName, // TODO Deprecated [breaking] getBackendName -> getServerName
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"getServerName": getServerName,
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"hasMaxconnAttributes": p.hasMaxConnAttributes, // TODO Deprecated [breaking]
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"getSticky": p.getSticky, // TODO Deprecated [breaking]
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"hasStickinessLabel": p.hasStickinessLabel, // TODO Deprecated [breaking]
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"getStickinessCookieName": p.getStickinessCookieName, // TODO Deprecated [breaking]
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"getWeight": p.getWeight, // TODO Deprecated [breaking] Must replaced by a simple: "getWeight": p.getFuncIntAttribute(label.SuffixWeight, 0)
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"getProtocol": p.getFuncStringAttribute(label.SuffixProtocol, label.DefaultProtocol),
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"getCircuitBreaker": p.getCircuitBreaker,
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"getLoadBalancer": p.getLoadBalancer,
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"getMaxConn": p.getMaxConn,
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"getHealthCheck": p.getHealthCheck,
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"getBuffering": p.getBuffering,
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// Frontend functions
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"getFrontendRule": p.getFrontendRule,
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"getBasicAuth": p.getFuncSliceAttribute(label.SuffixFrontendAuthBasic),
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"getEntryPoints": getEntryPoints, // TODO Deprecated [breaking]
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"getFrontEndEntryPoints": p.getFuncSliceAttribute(label.SuffixFrontendEntryPoints), // TODO [breaking] rename to getEntryPoints when getEntryPoints will be removed
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"getPriority": p.getFuncIntAttribute(label.SuffixFrontendPriority, label.DefaultFrontendPriorityInt),
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"getPassHostHeader": p.getFuncBoolAttribute(label.SuffixFrontendPassHostHeader, label.DefaultPassHostHeaderBool),
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"getPassTLSCert": p.getFuncBoolAttribute(label.SuffixFrontendPassTLSCert, label.DefaultPassTLSCert),
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"getWhitelistSourceRange": p.getFuncSliceAttribute(label.SuffixFrontendWhitelistSourceRange),
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"getRedirect": p.getRedirect,
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"hasErrorPages": p.getFuncHasAttributePrefix(label.BaseFrontendErrorPage),
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"getErrorPages": p.getErrorPages,
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"hasRateLimit": p.getFuncHasAttributePrefix(label.BaseFrontendRateLimit),
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"getRateLimit": p.getRateLimit,
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"getHeaders": p.getHeaders,
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}
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var allNodes []*api.ServiceEntry
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var services []*serviceUpdate
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for _, info := range catalog {
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if len(info.Nodes) > 0 {
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services = append(services, info.Service)
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allNodes = append(allNodes, info.Nodes...)
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}
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}
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// Ensure a stable ordering of nodes so that identical configurations may be detected
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sort.Sort(nodeSorter(allNodes))
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templateObjects := struct {
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Services []*serviceUpdate
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Nodes []*api.ServiceEntry
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}{
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Services: services,
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Nodes: allNodes,
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}
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configuration, err := p.GetConfiguration("templates/consul_catalog.tmpl", FuncMap, templateObjects)
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if err != nil {
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log.WithError(err).Error("Failed to create config")
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}
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return configuration
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}
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func (p *Provider) setupFrontEndRuleTemplate() {
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var FuncMap = template.FuncMap{
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"getAttribute": p.getAttribute,
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"getTag": getTag,
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"hasTag": hasTag,
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}
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tmpl := template.New("consul catalog frontend rule").Funcs(FuncMap)
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p.frontEndRuleTemplate = tmpl
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}
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// Specific functions
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func (p *Provider) getFrontendRule(service serviceUpdate) string {
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customFrontendRule := p.getAttribute(label.SuffixFrontendRule, service.Attributes, "")
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if customFrontendRule == "" {
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customFrontendRule = p.FrontEndRule
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}
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tmpl := p.frontEndRuleTemplate
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tmpl, err := tmpl.Parse(customFrontendRule)
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if err != nil {
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log.Errorf("Failed to parse Consul Catalog custom frontend rule: %v", err)
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return ""
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}
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templateObjects := struct {
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ServiceName string
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Domain string
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Attributes []string
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}{
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ServiceName: service.ServiceName,
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Domain: p.Domain,
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Attributes: service.Attributes,
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}
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var buffer bytes.Buffer
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err = tmpl.Execute(&buffer, templateObjects)
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if err != nil {
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log.Errorf("Failed to execute Consul Catalog custom frontend rule template: %v", err)
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return ""
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}
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return buffer.String()
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}
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// Deprecated
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func (p *Provider) hasMaxConnAttributes(attributes []string) bool {
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amount := p.getAttribute(label.SuffixBackendMaxConnAmount, attributes, "")
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extractorFunc := p.getAttribute(label.SuffixBackendMaxConnExtractorFunc, attributes, "")
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return amount != "" && extractorFunc != ""
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}
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// Deprecated
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func getEntryPoints(list string) []string {
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return strings.Split(list, ",")
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}
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func getNodeBackendName(node *api.ServiceEntry) string {
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return strings.ToLower(node.Service.Service)
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}
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func getServiceBackendName(service *serviceUpdate) string {
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return strings.ToLower(service.ServiceName)
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}
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func getBackendAddress(node *api.ServiceEntry) string {
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if node.Service.Address != "" {
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return node.Service.Address
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}
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return node.Node.Address
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}
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func getServerName(node *api.ServiceEntry, index int) string {
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serviceName := node.Service.Service + node.Service.Address + strconv.Itoa(node.Service.Port)
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// TODO sort tags ?
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serviceName += strings.Join(node.Service.Tags, "")
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hash := sha1.New()
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_, err := hash.Write([]byte(serviceName))
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if err != nil {
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// Impossible case
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log.Error(err)
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} else {
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serviceName = base64.URLEncoding.EncodeToString(hash.Sum(nil))
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}
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// unique int at the end
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return provider.Normalize(node.Service.Service + "-" + strconv.Itoa(index) + "-" + serviceName)
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}
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// TODO: Deprecated
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// replaced by Stickiness
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// Deprecated
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func (p *Provider) getSticky(tags []string) string {
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stickyTag := p.getAttribute(label.SuffixBackendLoadBalancerSticky, tags, "")
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if len(stickyTag) > 0 {
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log.Warnf("Deprecated configuration found: %s. Please use %s.", label.TraefikBackendLoadBalancerSticky, label.TraefikBackendLoadBalancerStickiness)
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} else {
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stickyTag = "false"
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}
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return stickyTag
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}
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// Deprecated
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func (p *Provider) hasStickinessLabel(tags []string) bool {
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stickinessTag := p.getAttribute(label.SuffixBackendLoadBalancerStickiness, tags, "")
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return len(stickinessTag) > 0 && strings.EqualFold(strings.TrimSpace(stickinessTag), "true")
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}
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// Deprecated
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func (p *Provider) getStickinessCookieName(tags []string) string {
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return p.getAttribute(label.SuffixBackendLoadBalancerStickinessCookieName, tags, "")
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}
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// Deprecated
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func (p *Provider) getWeight(tags []string) int {
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weight := p.getIntAttribute(label.SuffixWeight, tags, label.DefaultWeightInt)
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// Deprecated
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deprecatedWeightTag := "backend." + label.SuffixWeight
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if p.hasAttribute(deprecatedWeightTag, tags) {
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log.Warnf("Deprecated configuration found: %s. Please use %s.",
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p.getPrefixedName(deprecatedWeightTag), p.getPrefixedName(label.SuffixWeight))
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weight = p.getIntAttribute(deprecatedWeightTag, tags, label.DefaultWeightInt)
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}
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return weight
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}
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func (p *Provider) getCircuitBreaker(tags []string) *types.CircuitBreaker {
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circuitBreaker := p.getAttribute(label.SuffixBackendCircuitBreakerExpression, tags, "")
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if p.hasAttribute(label.SuffixBackendCircuitBreaker, tags) {
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log.Warnf("Deprecated configuration found: %s. Please use %s.",
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p.getPrefixedName(label.SuffixBackendCircuitBreaker), p.getPrefixedName(label.SuffixBackendCircuitBreakerExpression))
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circuitBreaker = p.getAttribute(label.SuffixBackendCircuitBreaker, tags, "")
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}
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if len(circuitBreaker) == 0 {
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return nil
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}
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return &types.CircuitBreaker{Expression: circuitBreaker}
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}
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func (p *Provider) getLoadBalancer(tags []string) *types.LoadBalancer {
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rawSticky := p.getSticky(tags)
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sticky, err := strconv.ParseBool(rawSticky)
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if err != nil {
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log.Debugf("Invalid sticky value: %s", rawSticky)
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sticky = false
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}
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method := p.getAttribute(label.SuffixBackendLoadBalancerMethod, tags, label.DefaultBackendLoadBalancerMethod)
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// Deprecated
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deprecatedMethodTag := "backend.loadbalancer"
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if p.hasAttribute(deprecatedMethodTag, tags) {
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log.Warnf("Deprecated configuration found: %s. Please use %s.",
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p.getPrefixedName(deprecatedMethodTag), p.getPrefixedName(label.SuffixWeight))
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method = p.getAttribute(deprecatedMethodTag, tags, label.SuffixBackendLoadBalancerMethod)
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}
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lb := &types.LoadBalancer{
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Method: method,
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Sticky: sticky,
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}
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if p.getBoolAttribute(label.SuffixBackendLoadBalancerStickiness, tags, false) {
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lb.Stickiness = &types.Stickiness{
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CookieName: p.getAttribute(label.SuffixBackendLoadBalancerStickinessCookieName, tags, ""),
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}
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}
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return lb
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}
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func (p *Provider) getMaxConn(tags []string) *types.MaxConn {
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amount := p.getInt64Attribute(label.SuffixBackendMaxConnAmount, tags, math.MinInt64)
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extractorFunc := p.getAttribute(label.SuffixBackendMaxConnExtractorFunc, tags, label.DefaultBackendMaxconnExtractorFunc)
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if amount == math.MinInt64 || len(extractorFunc) == 0 {
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return nil
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}
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return &types.MaxConn{
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Amount: amount,
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ExtractorFunc: extractorFunc,
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}
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}
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func (p *Provider) getHealthCheck(tags []string) *types.HealthCheck {
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path := p.getAttribute(label.SuffixBackendHealthCheckPath, tags, "")
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if len(path) == 0 {
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return nil
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}
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port := p.getIntAttribute(label.SuffixBackendHealthCheckPort, tags, label.DefaultBackendHealthCheckPort)
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interval := p.getAttribute(label.SuffixBackendHealthCheckInterval, tags, "")
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return &types.HealthCheck{
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Path: path,
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Port: port,
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Interval: interval,
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}
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}
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func (p *Provider) getBuffering(tags []string) *types.Buffering {
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if !p.hasAttributePrefix(label.SuffixBackendBuffering, tags) {
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return nil
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}
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return &types.Buffering{
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MaxRequestBodyBytes: p.getInt64Attribute(label.SuffixBackendBufferingMaxRequestBodyBytes, tags, 0),
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MaxResponseBodyBytes: p.getInt64Attribute(label.SuffixBackendBufferingMaxResponseBodyBytes, tags, 0),
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MemRequestBodyBytes: p.getInt64Attribute(label.SuffixBackendBufferingMemRequestBodyBytes, tags, 0),
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MemResponseBodyBytes: p.getInt64Attribute(label.SuffixBackendBufferingMemResponseBodyBytes, tags, 0),
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RetryExpression: p.getAttribute(label.SuffixBackendBufferingRetryExpression, tags, ""),
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}
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}
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func (p *Provider) getRedirect(tags []string) *types.Redirect {
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permanent := p.getBoolAttribute(label.SuffixFrontendRedirectPermanent, tags, false)
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if p.hasAttribute(label.SuffixFrontendRedirectEntryPoint, tags) {
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return &types.Redirect{
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EntryPoint: p.getAttribute(label.SuffixFrontendRedirectEntryPoint, tags, ""),
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Permanent: permanent,
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}
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}
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if p.hasAttribute(label.SuffixFrontendRedirectRegex, tags) && p.hasAttribute(label.SuffixFrontendRedirectReplacement, tags) {
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return &types.Redirect{
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Regex: p.getAttribute(label.SuffixFrontendRedirectRegex, tags, ""),
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Replacement: p.getAttribute(label.SuffixFrontendRedirectReplacement, tags, ""),
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Permanent: permanent,
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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) getErrorPages(tags []string) map[string]*types.ErrorPage {
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labels := p.parseTagsToNeutralLabels(tags)
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prefix := label.Prefix + label.BaseFrontendErrorPage
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return label.ParseErrorPages(labels, prefix, label.RegexpFrontendErrorPage)
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}
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func (p *Provider) getRateLimit(tags []string) *types.RateLimit {
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extractorFunc := p.getAttribute(label.SuffixFrontendRateLimitExtractorFunc, tags, "")
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if len(extractorFunc) == 0 {
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return nil
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}
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labels := p.parseTagsToNeutralLabels(tags)
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prefix := label.Prefix + label.BaseFrontendRateLimit
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limits := label.ParseRateSets(labels, prefix, label.RegexpFrontendRateLimit)
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return &types.RateLimit{
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ExtractorFunc: extractorFunc,
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RateSet: limits,
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}
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}
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func (p *Provider) getHeaders(tags []string) *types.Headers {
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headers := &types.Headers{
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CustomRequestHeaders: p.getMapAttribute(label.SuffixFrontendRequestHeaders, tags),
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CustomResponseHeaders: p.getMapAttribute(label.SuffixFrontendResponseHeaders, tags),
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SSLProxyHeaders: p.getMapAttribute(label.SuffixFrontendHeadersSSLProxyHeaders, tags),
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AllowedHosts: p.getSliceAttribute(label.SuffixFrontendHeadersAllowedHosts, tags),
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HostsProxyHeaders: p.getSliceAttribute(label.SuffixFrontendHeadersHostsProxyHeaders, tags),
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SSLHost: p.getAttribute(label.SuffixFrontendHeadersSSLHost, tags, ""),
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CustomFrameOptionsValue: p.getAttribute(label.SuffixFrontendHeadersCustomFrameOptionsValue, tags, ""),
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ContentSecurityPolicy: p.getAttribute(label.SuffixFrontendHeadersContentSecurityPolicy, tags, ""),
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PublicKey: p.getAttribute(label.SuffixFrontendHeadersPublicKey, tags, ""),
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ReferrerPolicy: p.getAttribute(label.SuffixFrontendHeadersReferrerPolicy, tags, ""),
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STSSeconds: p.getInt64Attribute(label.SuffixFrontendHeadersSTSSeconds, tags, 0),
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SSLRedirect: p.getBoolAttribute(label.SuffixFrontendHeadersSSLRedirect, tags, false),
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SSLTemporaryRedirect: p.getBoolAttribute(label.SuffixFrontendHeadersSSLTemporaryRedirect, tags, false),
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STSIncludeSubdomains: p.getBoolAttribute(label.SuffixFrontendHeadersSTSIncludeSubdomains, tags, false),
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STSPreload: p.getBoolAttribute(label.SuffixFrontendHeadersSTSPreload, tags, false),
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ForceSTSHeader: p.getBoolAttribute(label.SuffixFrontendHeadersForceSTSHeader, tags, false),
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FrameDeny: p.getBoolAttribute(label.SuffixFrontendHeadersFrameDeny, tags, false),
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ContentTypeNosniff: p.getBoolAttribute(label.SuffixFrontendHeadersContentTypeNosniff, tags, false),
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BrowserXSSFilter: p.getBoolAttribute(label.SuffixFrontendHeadersBrowserXSSFilter, tags, false),
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IsDevelopment: p.getBoolAttribute(label.SuffixFrontendHeadersIsDevelopment, tags, false),
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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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// Base functions
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func (p *Provider) parseTagsToNeutralLabels(tags []string) map[string]string {
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var labels map[string]string
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for _, tag := range tags {
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if strings.HasPrefix(tag, p.Prefix) {
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parts := strings.SplitN(tag, "=", 2)
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if len(parts) == 2 {
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if labels == nil {
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labels = make(map[string]string)
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}
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// replace custom prefix by the generic prefix
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key := label.Prefix + strings.TrimPrefix(parts[0], p.Prefix+".")
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labels[key] = parts[1]
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}
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}
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}
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return labels
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}
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func (p *Provider) getFuncStringAttribute(name string, defaultValue string) func(tags []string) string {
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return func(tags []string) string {
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return p.getAttribute(name, tags, defaultValue)
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}
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}
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func (p *Provider) getFuncSliceAttribute(name string) func(tags []string) []string {
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return func(tags []string) []string {
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return p.getSliceAttribute(name, tags)
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}
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}
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func (p *Provider) getMapAttribute(name string, tags []string) map[string]string {
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rawValue := getTag(p.getPrefixedName(name), tags, "")
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if len(rawValue) == 0 {
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return nil
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}
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return label.ParseMapValue(p.getPrefixedName(name), rawValue)
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}
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func (p *Provider) getFuncIntAttribute(name string, defaultValue int) func(tags []string) int {
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return func(tags []string) int {
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return p.getIntAttribute(name, tags, defaultValue)
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}
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}
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func (p *Provider) getFuncBoolAttribute(name string, defaultValue bool) func(tags []string) bool {
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return func(tags []string) bool {
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return p.getBoolAttribute(name, tags, defaultValue)
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}
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}
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func (p *Provider) getFuncHasAttributePrefix(name string) func(tags []string) bool {
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return func(tags []string) bool {
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return p.hasAttributePrefix(name, tags)
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}
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}
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func (p *Provider) getInt64Attribute(name string, tags []string, defaultValue int64) int64 {
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rawValue := getTag(p.getPrefixedName(name), tags, "")
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if len(rawValue) == 0 {
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return defaultValue
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}
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value, err := strconv.ParseInt(rawValue, 10, 64)
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if err != nil {
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log.Errorf("Invalid value for %s: %s", name, rawValue)
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return defaultValue
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}
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return value
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}
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func (p *Provider) getIntAttribute(name string, tags []string, defaultValue int) int {
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rawValue := getTag(p.getPrefixedName(name), tags, "")
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if len(rawValue) == 0 {
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return defaultValue
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}
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value, err := strconv.Atoi(rawValue)
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if err != nil {
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log.Errorf("Invalid value for %s: %s", name, rawValue)
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return defaultValue
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}
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return value
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}
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func (p *Provider) getSliceAttribute(name string, tags []string) []string {
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rawValue := getTag(p.getPrefixedName(name), tags, "")
|
|
|
|
if len(rawValue) == 0 {
|
|
return nil
|
|
}
|
|
return label.SplitAndTrimString(rawValue, ",")
|
|
}
|
|
|
|
func (p *Provider) getBoolAttribute(name string, tags []string, defaultValue bool) bool {
|
|
rawValue := getTag(p.getPrefixedName(name), tags, "")
|
|
|
|
if len(rawValue) == 0 {
|
|
return defaultValue
|
|
}
|
|
|
|
value, err := strconv.ParseBool(rawValue)
|
|
if err != nil {
|
|
log.Errorf("Invalid value for %s: %s", name, rawValue)
|
|
return defaultValue
|
|
}
|
|
return value
|
|
}
|
|
|
|
func (p *Provider) hasAttribute(name string, tags []string) bool {
|
|
return hasTag(p.getPrefixedName(name), tags)
|
|
}
|
|
|
|
func (p *Provider) hasAttributePrefix(name string, tags []string) bool {
|
|
return hasTagPrefix(p.getPrefixedName(name), tags)
|
|
}
|
|
|
|
func (p *Provider) getAttribute(name string, tags []string, defaultValue string) string {
|
|
return getTag(p.getPrefixedName(name), tags, defaultValue)
|
|
}
|
|
|
|
func (p *Provider) getPrefixedName(name string) string {
|
|
if len(p.Prefix) > 0 && len(name) > 0 {
|
|
return p.Prefix + "." + name
|
|
}
|
|
return name
|
|
}
|
|
|
|
func hasTag(name string, tags []string) bool {
|
|
lowerName := strings.ToLower(name)
|
|
|
|
for _, tag := range tags {
|
|
lowerTag := strings.ToLower(tag)
|
|
|
|
// Given the nature of Consul tags, which could be either singular markers, or key=value pairs
|
|
if strings.HasPrefix(lowerTag, lowerName+"=") || lowerTag == lowerName {
|
|
return true
|
|
}
|
|
}
|
|
return false
|
|
}
|
|
|
|
func hasTagPrefix(name string, tags []string) bool {
|
|
lowerName := strings.ToLower(name)
|
|
|
|
for _, tag := range tags {
|
|
lowerTag := strings.ToLower(tag)
|
|
|
|
if strings.HasPrefix(lowerTag, lowerName) {
|
|
return true
|
|
}
|
|
}
|
|
return false
|
|
}
|
|
|
|
func getTag(name string, tags []string, defaultValue string) string {
|
|
lowerName := strings.ToLower(name)
|
|
|
|
for _, tag := range tags {
|
|
lowerTag := strings.ToLower(tag)
|
|
|
|
// Given the nature of Consul tags, which could be either singular markers, or key=value pairs
|
|
if strings.HasPrefix(lowerTag, lowerName+"=") || lowerTag == lowerName {
|
|
// In case, where a tag might be a key=value, try to split it by the first '='
|
|
kv := strings.SplitN(tag, "=", 2)
|
|
|
|
// If the returned result is a key=value pair, return the 'value' component
|
|
if len(kv) == 2 {
|
|
return kv[1]
|
|
}
|
|
// If the returned result is a singular marker, return the 'key' component
|
|
return kv[0]
|
|
}
|
|
|
|
}
|
|
return defaultValue
|
|
}
|