310 lines
9.4 KiB
Go
310 lines
9.4 KiB
Go
package mesos
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import (
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"fmt"
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"math"
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"net"
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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/mesosphere/mesos-dns/records/state"
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)
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type taskData struct {
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state.Task
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TraefikLabels map[string]string
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SegmentName string
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}
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func (p *Provider) buildConfigurationV2(tasks []state.Task) *types.Configuration {
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var mesosFuncMap = template.FuncMap{
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"getDomain": label.GetFuncString(label.TraefikDomain, p.Domain),
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"getSubDomain": p.getSubDomain,
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"getSegmentSubDomain": p.getSegmentSubDomain,
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"getID": getID,
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// Backend functions
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"getBackendName": getBackendName,
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"getCircuitBreaker": label.GetCircuitBreaker,
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"getLoadBalancer": label.GetLoadBalancer,
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"getMaxConn": label.GetMaxConn,
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"getHealthCheck": label.GetHealthCheck,
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"getBuffering": label.GetBuffering,
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"getServers": p.getServers,
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"getHost": p.getHost,
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"getServerPort": p.getServerPort,
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// Frontend functions
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"getSegmentNameSuffix": getSegmentNameSuffix,
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"getFrontEndName": getFrontendName,
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"getEntryPoints": label.GetFuncSliceString(label.TraefikFrontendEntryPoints),
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"getBasicAuth": label.GetFuncSliceString(label.TraefikFrontendAuthBasic), // Deprecated
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"getAuth": label.GetAuth,
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"getPriority": label.GetFuncInt(label.TraefikFrontendPriority, label.DefaultFrontendPriority),
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"getPassHostHeader": label.GetFuncBool(label.TraefikFrontendPassHostHeader, label.DefaultPassHostHeader),
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"getPassTLSCert": label.GetFuncBool(label.TraefikFrontendPassTLSCert, label.DefaultPassTLSCert),
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"getPassTLSClientCert": label.GetTLSClientCert,
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"getFrontendRule": p.getFrontendRule,
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"getRedirect": label.GetRedirect,
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"getErrorPages": label.GetErrorPages,
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"getRateLimit": label.GetRateLimit,
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"getHeaders": label.GetHeaders,
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"getWhiteList": label.GetWhiteList,
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}
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appsTasks := p.filterTasks(tasks)
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templateObjects := struct {
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ApplicationsTasks map[string][]taskData
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Domain string
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}{
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ApplicationsTasks: appsTasks,
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Domain: p.Domain,
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}
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configuration, err := p.GetConfiguration("templates/mesos.tmpl", mesosFuncMap, templateObjects)
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if err != nil {
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log.Error(err)
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}
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return configuration
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}
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func (p *Provider) filterTasks(tasks []state.Task) map[string][]taskData {
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appsTasks := make(map[string][]taskData)
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for _, task := range tasks {
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taskLabels := label.ExtractTraefikLabels(extractLabels(task))
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for segmentName, traefikLabels := range taskLabels {
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data := taskData{
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Task: task,
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TraefikLabels: traefikLabels,
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SegmentName: segmentName,
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}
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if taskFilter(data, p.ExposedByDefault) {
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name := getName(data)
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if _, ok := appsTasks[name]; !ok {
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appsTasks[name] = []taskData{data}
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} else {
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appsTasks[name] = append(appsTasks[name], data)
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}
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}
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}
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}
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return appsTasks
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}
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func taskFilter(task taskData, exposedByDefaultFlag bool) bool {
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name := getName(task)
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if len(task.DiscoveryInfo.Ports.DiscoveryPorts) == 0 {
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log.Debugf("Filtering Mesos task without port %s", name)
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return false
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}
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if !isEnabled(task, exposedByDefaultFlag) {
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log.Debugf("Filtering disabled Mesos task %s", name)
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return false
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}
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// filter indeterminable task port
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portIndexLabel := label.GetStringValue(task.TraefikLabels, label.TraefikPortIndex, "")
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portNameLabel := label.GetStringValue(task.TraefikLabels, label.TraefikPortName, "")
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portValueLabel := label.GetStringValue(task.TraefikLabels, label.TraefikPort, "")
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if portIndexLabel != "" && portValueLabel != "" {
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log.Debugf("Filtering Mesos task %s specifying both %q' and %q labels", task.Name, label.TraefikPortIndex, label.TraefikPort)
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return false
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}
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if portIndexLabel != "" {
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index, err := strconv.Atoi(portIndexLabel)
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if err != nil || index < 0 || index > len(task.DiscoveryInfo.Ports.DiscoveryPorts)-1 {
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log.Debugf("Filtering Mesos task %s with unexpected value for %q label", task.Name, label.TraefikPortIndex)
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return false
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}
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}
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if portValueLabel != "" {
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port, err := strconv.Atoi(portValueLabel)
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if err != nil {
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log.Debugf("Filtering Mesos task %s with unexpected value for %q label", task.Name, label.TraefikPort)
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return false
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}
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var foundPort bool
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for _, exposedPort := range task.DiscoveryInfo.Ports.DiscoveryPorts {
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if port == exposedPort.Number {
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foundPort = true
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break
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}
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}
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if !foundPort {
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log.Debugf("Filtering Mesos task %s without a matching port for %q label", task.Name, label.TraefikPort)
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return false
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}
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}
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if portNameLabel != "" {
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var foundPort bool
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for _, exposedPort := range task.DiscoveryInfo.Ports.DiscoveryPorts {
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if portNameLabel == exposedPort.Name {
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foundPort = true
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break
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}
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}
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if !foundPort {
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log.Debugf("Filtering Mesos task %s without a matching port for %q label", task.Name, label.TraefikPortName)
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return false
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}
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}
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// filter healthChecks
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if task.Statuses != nil && len(task.Statuses) > 0 && task.Statuses[0].Healthy != nil && !*task.Statuses[0].Healthy {
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log.Debugf("Filtering Mesos task %s with bad healthCheck", name)
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return false
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}
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return true
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}
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func getID(task taskData) string {
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return provider.Normalize(task.ID + getSegmentNameSuffix(task.SegmentName))
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}
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func getName(task taskData) string {
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return provider.Normalize(task.DiscoveryInfo.Name + getSegmentNameSuffix(task.SegmentName))
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}
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func getBackendName(task taskData) string {
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return label.GetStringValue(task.TraefikLabels, label.TraefikBackend, getName(task))
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}
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func getFrontendName(task taskData) string {
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// TODO task.ID -> task.Name + task.ID
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return provider.Normalize(task.ID + getSegmentNameSuffix(task.SegmentName))
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}
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func getSegmentNameSuffix(serviceName string) string {
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if len(serviceName) > 0 {
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return "-service-" + provider.Normalize(serviceName)
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}
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return ""
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}
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func (p *Provider) getSubDomain(name string) string {
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if p.GroupsAsSubDomains {
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splitedName := strings.Split(strings.TrimPrefix(name, "/"), "/")
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provider.ReverseStringSlice(&splitedName)
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reverseName := strings.Join(splitedName, ".")
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return reverseName
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}
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return strings.Replace(strings.Replace(strings.TrimPrefix(name, "/"), "/", "-", -1), "_", "-", -1)
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}
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func (p *Provider) getSegmentSubDomain(task taskData) string {
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subDomain := strings.ToLower(p.getSubDomain(task.DiscoveryInfo.Name))
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if len(task.SegmentName) > 0 {
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subDomain = strings.ToLower(provider.Normalize(task.SegmentName)) + "." + subDomain
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}
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return subDomain
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}
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// getFrontendRule returns the frontend rule for the specified application, using it's label.
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// It returns a default one (Host) if the label is not present.
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func (p *Provider) getFrontendRule(task taskData) string {
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if v := label.GetStringValue(task.TraefikLabels, label.TraefikFrontendRule, ""); len(v) > 0 {
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return v
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}
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domain := label.GetStringValue(task.TraefikLabels, label.TraefikDomain, p.Domain)
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if len(domain) > 0 {
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domain = "." + domain
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}
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return "Host:" + p.getSegmentSubDomain(task) + domain
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}
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func (p *Provider) getServers(tasks []taskData) map[string]types.Server {
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var servers map[string]types.Server
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for _, task := range tasks {
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if servers == nil {
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servers = make(map[string]types.Server)
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}
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protocol := label.GetStringValue(task.TraefikLabels, label.TraefikProtocol, label.DefaultProtocol)
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host := p.getHost(task)
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port := p.getServerPort(task)
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serverName := "server-" + getID(task)
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servers[serverName] = types.Server{
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URL: fmt.Sprintf("%s://%s", protocol, net.JoinHostPort(host, port)),
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Weight: getIntValue(task.TraefikLabels, label.TraefikWeight, label.DefaultWeight, math.MaxInt32),
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}
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}
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return servers
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}
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func (p *Provider) getHost(task taskData) string {
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return task.IP(strings.Split(p.IPSources, ",")...)
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}
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func (p *Provider) getServerPort(task taskData) string {
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if label.Has(task.TraefikLabels, label.TraefikPort) {
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pv := label.GetIntValue(task.TraefikLabels, label.TraefikPort, 0)
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if pv <= 0 {
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log.Errorf("explicitly specified port %d must be larger than zero", pv)
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return ""
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}
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return strconv.Itoa(pv)
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}
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plv := getIntValue(task.TraefikLabels, label.TraefikPortIndex, math.MinInt32, len(task.DiscoveryInfo.Ports.DiscoveryPorts)-1)
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if plv >= 0 {
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return strconv.Itoa(task.DiscoveryInfo.Ports.DiscoveryPorts[plv].Number)
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}
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// Find named port using traefik.portName or the segment name
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if pn := label.GetStringValue(task.TraefikLabels, label.TraefikPortName, task.SegmentName); len(pn) > 0 {
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for _, port := range task.DiscoveryInfo.Ports.DiscoveryPorts {
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if pn == port.Name {
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return strconv.Itoa(port.Number)
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}
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}
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}
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for _, port := range task.DiscoveryInfo.Ports.DiscoveryPorts {
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return strconv.Itoa(port.Number)
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}
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return ""
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}
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func isEnabled(task taskData, exposedByDefault bool) bool {
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return label.GetBoolValue(task.TraefikLabels, label.TraefikEnable, exposedByDefault)
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}
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// Label functions
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func getIntValue(labels map[string]string, labelName string, defaultValue int, maxValue int) int {
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value := label.GetIntValue(labels, labelName, defaultValue)
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if value <= maxValue {
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return value
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}
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log.Warnf("The value %d for %s exceed the max authorized value %d, falling back to %d.", value, labelName, maxValue, defaultValue)
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return defaultValue
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}
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func extractLabels(task state.Task) map[string]string {
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labels := make(map[string]string)
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for _, lbl := range task.Labels {
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labels[lbl.Key] = lbl.Value
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}
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return labels
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}
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