547 lines
18 KiB
Go
547 lines
18 KiB
Go
package provider
|
|
|
|
import (
|
|
"errors"
|
|
"math"
|
|
"net"
|
|
"net/http"
|
|
"net/url"
|
|
"strconv"
|
|
"strings"
|
|
"text/template"
|
|
"time"
|
|
|
|
"github.com/BurntSushi/ty/fun"
|
|
"github.com/cenk/backoff"
|
|
"github.com/containous/traefik/job"
|
|
"github.com/containous/traefik/log"
|
|
"github.com/containous/traefik/safe"
|
|
"github.com/containous/traefik/types"
|
|
"github.com/gambol99/go-marathon"
|
|
)
|
|
|
|
var _ Provider = (*Marathon)(nil)
|
|
|
|
// Marathon holds configuration of the Marathon provider.
|
|
type Marathon struct {
|
|
BaseProvider
|
|
Endpoint string `description:"Marathon server endpoint. You can also specify multiple endpoint for Marathon"`
|
|
Domain string `description:"Default domain used"`
|
|
ExposedByDefault bool `description:"Expose Marathon apps by default"`
|
|
GroupsAsSubDomains bool `description:"Convert Marathon groups to subdomains"`
|
|
DCOSToken string `description:"DCOSToken for DCOS environment, This will override the Authorization header"`
|
|
MarathonLBCompatibility bool `description:"Add compatibility with marathon-lb labels"`
|
|
TLS *ClientTLS `description:"Enable Docker TLS support"`
|
|
DialerTimeout time.Duration `description:"Set a non-default connection timeout for Marathon"`
|
|
KeepAlive time.Duration `description:"Set a non-default TCP Keep Alive time in seconds"`
|
|
Basic *MarathonBasic
|
|
marathonClient marathon.Marathon
|
|
}
|
|
|
|
// MarathonBasic holds basic authentication specific configurations
|
|
type MarathonBasic struct {
|
|
HTTPBasicAuthUser string
|
|
HTTPBasicPassword string
|
|
}
|
|
|
|
type lightMarathonClient interface {
|
|
AllTasks(v url.Values) (*marathon.Tasks, error)
|
|
Applications(url.Values) (*marathon.Applications, error)
|
|
}
|
|
|
|
// Provide allows the provider to provide configurations to traefik
|
|
// using the given configuration channel.
|
|
func (provider *Marathon) Provide(configurationChan chan<- types.ConfigMessage, pool *safe.Pool, constraints types.Constraints) error {
|
|
provider.Constraints = append(provider.Constraints, constraints...)
|
|
operation := func() error {
|
|
config := marathon.NewDefaultConfig()
|
|
config.URL = provider.Endpoint
|
|
config.EventsTransport = marathon.EventsTransportSSE
|
|
if provider.Basic != nil {
|
|
config.HTTPBasicAuthUser = provider.Basic.HTTPBasicAuthUser
|
|
config.HTTPBasicPassword = provider.Basic.HTTPBasicPassword
|
|
}
|
|
if len(provider.DCOSToken) > 0 {
|
|
config.DCOSToken = provider.DCOSToken
|
|
}
|
|
TLSConfig, err := provider.TLS.CreateTLSConfig()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
config.HTTPClient = &http.Client{
|
|
Transport: &http.Transport{
|
|
DialContext: (&net.Dialer{
|
|
KeepAlive: provider.KeepAlive * time.Second,
|
|
Timeout: time.Second * provider.DialerTimeout,
|
|
}).DialContext,
|
|
TLSClientConfig: TLSConfig,
|
|
},
|
|
}
|
|
client, err := marathon.NewClient(config)
|
|
if err != nil {
|
|
log.Errorf("Failed to create a client for marathon, error: %s", err)
|
|
return err
|
|
}
|
|
provider.marathonClient = client
|
|
|
|
if provider.Watch {
|
|
update, err := client.AddEventsListener(marathon.EventIDApplications)
|
|
if err != nil {
|
|
log.Errorf("Failed to register for events, %s", err)
|
|
return err
|
|
}
|
|
pool.Go(func(stop chan bool) {
|
|
defer close(update)
|
|
for {
|
|
select {
|
|
case <-stop:
|
|
return
|
|
case event := <-update:
|
|
log.Debug("Marathon event receveived", event)
|
|
configuration := provider.loadMarathonConfig()
|
|
if configuration != nil {
|
|
configurationChan <- types.ConfigMessage{
|
|
ProviderName: "marathon",
|
|
Configuration: configuration,
|
|
}
|
|
}
|
|
}
|
|
}
|
|
})
|
|
}
|
|
configuration := provider.loadMarathonConfig()
|
|
configurationChan <- types.ConfigMessage{
|
|
ProviderName: "marathon",
|
|
Configuration: configuration,
|
|
}
|
|
return nil
|
|
}
|
|
|
|
notify := func(err error, time time.Duration) {
|
|
log.Errorf("Marathon connection error %+v, retrying in %s", err, time)
|
|
}
|
|
err := backoff.RetryNotify(safe.OperationWithRecover(operation), job.NewBackOff(backoff.NewExponentialBackOff()), notify)
|
|
if err != nil {
|
|
log.Errorf("Cannot connect to Marathon server %+v", err)
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func (provider *Marathon) loadMarathonConfig() *types.Configuration {
|
|
var MarathonFuncMap = template.FuncMap{
|
|
"getBackend": provider.getBackend,
|
|
"getBackendServer": provider.getBackendServer,
|
|
"getPort": provider.getPort,
|
|
"getWeight": provider.getWeight,
|
|
"getDomain": provider.getDomain,
|
|
"getProtocol": provider.getProtocol,
|
|
"getPassHostHeader": provider.getPassHostHeader,
|
|
"getPriority": provider.getPriority,
|
|
"getEntryPoints": provider.getEntryPoints,
|
|
"getFrontendRule": provider.getFrontendRule,
|
|
"getFrontendBackend": provider.getFrontendBackend,
|
|
"hasCircuitBreakerLabels": provider.hasCircuitBreakerLabels,
|
|
"hasLoadBalancerLabels": provider.hasLoadBalancerLabels,
|
|
"hasMaxConnLabels": provider.hasMaxConnLabels,
|
|
"getMaxConnExtractorFunc": provider.getMaxConnExtractorFunc,
|
|
"getMaxConnAmount": provider.getMaxConnAmount,
|
|
"getLoadBalancerMethod": provider.getLoadBalancerMethod,
|
|
"getCircuitBreakerExpression": provider.getCircuitBreakerExpression,
|
|
"getSticky": provider.getSticky,
|
|
}
|
|
|
|
applications, err := provider.marathonClient.Applications(nil)
|
|
if err != nil {
|
|
log.Errorf("Failed to create a client for marathon, error: %s", err)
|
|
return nil
|
|
}
|
|
|
|
tasks, err := provider.marathonClient.AllTasks(&marathon.AllTasksOpts{Status: "running"})
|
|
if err != nil {
|
|
log.Errorf("Failed to create a client for marathon, error: %s", err)
|
|
return nil
|
|
}
|
|
|
|
//filter tasks
|
|
filteredTasks := fun.Filter(func(task marathon.Task) bool {
|
|
return provider.taskFilter(task, applications, provider.ExposedByDefault)
|
|
}, tasks.Tasks).([]marathon.Task)
|
|
|
|
//filter apps
|
|
filteredApps := fun.Filter(func(app marathon.Application) bool {
|
|
return provider.applicationFilter(app, filteredTasks)
|
|
}, applications.Apps).([]marathon.Application)
|
|
|
|
templateObjects := struct {
|
|
Applications []marathon.Application
|
|
Tasks []marathon.Task
|
|
Domain string
|
|
}{
|
|
filteredApps,
|
|
filteredTasks,
|
|
provider.Domain,
|
|
}
|
|
|
|
configuration, err := provider.getConfiguration("templates/marathon.tmpl", MarathonFuncMap, templateObjects)
|
|
if err != nil {
|
|
log.Error(err)
|
|
}
|
|
return configuration
|
|
}
|
|
|
|
func (provider *Marathon) taskFilter(task marathon.Task, applications *marathon.Applications, exposedByDefaultFlag bool) bool {
|
|
application, err := getApplication(task, applications.Apps)
|
|
if err != nil {
|
|
log.Errorf("Unable to get marathon application from task %s", task.AppID)
|
|
return false
|
|
}
|
|
ports := processPorts(application, task)
|
|
if len(ports) == 0 {
|
|
log.Debug("Filtering marathon task without port %s", task.AppID)
|
|
return false
|
|
}
|
|
label, _ := provider.getLabel(application, "traefik.tags")
|
|
constraintTags := strings.Split(label, ",")
|
|
if provider.MarathonLBCompatibility {
|
|
if label, err := provider.getLabel(application, "HAPROXY_GROUP"); err == nil {
|
|
constraintTags = append(constraintTags, label)
|
|
}
|
|
}
|
|
if ok, failingConstraint := provider.MatchConstraints(constraintTags); !ok {
|
|
if failingConstraint != nil {
|
|
log.Debugf("Application %v pruned by '%v' constraint", application.ID, failingConstraint.String())
|
|
}
|
|
return false
|
|
}
|
|
|
|
if !isApplicationEnabled(application, exposedByDefaultFlag) {
|
|
log.Debugf("Filtering disabled marathon task %s", task.AppID)
|
|
return false
|
|
}
|
|
|
|
//filter indeterminable task port
|
|
portIndexLabel := (*application.Labels)["traefik.portIndex"]
|
|
portValueLabel := (*application.Labels)["traefik.port"]
|
|
if portIndexLabel != "" && portValueLabel != "" {
|
|
log.Debugf("Filtering marathon task %s specifying both traefik.portIndex and traefik.port labels", task.AppID)
|
|
return false
|
|
}
|
|
if portIndexLabel != "" {
|
|
index, err := strconv.Atoi((*application.Labels)["traefik.portIndex"])
|
|
if err != nil || index < 0 || index > len(ports)-1 {
|
|
log.Debugf("Filtering marathon task %s with unexpected value for traefik.portIndex label", task.AppID)
|
|
return false
|
|
}
|
|
}
|
|
if portValueLabel != "" {
|
|
port, err := strconv.Atoi((*application.Labels)["traefik.port"])
|
|
if err != nil {
|
|
log.Debugf("Filtering marathon task %s with unexpected value for traefik.port label", task.AppID)
|
|
return false
|
|
}
|
|
|
|
var foundPort bool
|
|
for _, exposedPort := range ports {
|
|
if port == exposedPort {
|
|
foundPort = true
|
|
break
|
|
}
|
|
}
|
|
|
|
if !foundPort {
|
|
log.Debugf("Filtering marathon task %s without a matching port for traefik.port label", task.AppID)
|
|
return false
|
|
}
|
|
}
|
|
|
|
//filter healthchecks
|
|
if application.HasHealthChecks() {
|
|
if task.HasHealthCheckResults() {
|
|
for _, healthcheck := range task.HealthCheckResults {
|
|
// found one bad healthcheck, return false
|
|
if !healthcheck.Alive {
|
|
log.Debugf("Filtering marathon task %s with bad healthcheck", task.AppID)
|
|
return false
|
|
}
|
|
}
|
|
}
|
|
}
|
|
return true
|
|
}
|
|
|
|
func (provider *Marathon) applicationFilter(app marathon.Application, filteredTasks []marathon.Task) bool {
|
|
label, _ := provider.getLabel(app, "traefik.tags")
|
|
constraintTags := strings.Split(label, ",")
|
|
if provider.MarathonLBCompatibility {
|
|
if label, err := provider.getLabel(app, "HAPROXY_GROUP"); err == nil {
|
|
constraintTags = append(constraintTags, label)
|
|
}
|
|
}
|
|
if ok, failingConstraint := provider.MatchConstraints(constraintTags); !ok {
|
|
if failingConstraint != nil {
|
|
log.Debugf("Application %v pruned by '%v' constraint", app.ID, failingConstraint.String())
|
|
}
|
|
return false
|
|
}
|
|
|
|
return fun.Exists(func(task marathon.Task) bool {
|
|
return task.AppID == app.ID
|
|
}, filteredTasks)
|
|
}
|
|
|
|
func getApplication(task marathon.Task, apps []marathon.Application) (marathon.Application, error) {
|
|
for _, application := range apps {
|
|
if application.ID == task.AppID {
|
|
return application, nil
|
|
}
|
|
}
|
|
return marathon.Application{}, errors.New("Application not found: " + task.AppID)
|
|
}
|
|
|
|
func isApplicationEnabled(application marathon.Application, exposedByDefault bool) bool {
|
|
return exposedByDefault && (*application.Labels)["traefik.enable"] != "false" || (*application.Labels)["traefik.enable"] == "true"
|
|
}
|
|
|
|
func (provider *Marathon) getLabel(application marathon.Application, label string) (string, error) {
|
|
for key, value := range *application.Labels {
|
|
if key == label {
|
|
return value, nil
|
|
}
|
|
}
|
|
return "", errors.New("Label not found:" + label)
|
|
}
|
|
|
|
func (provider *Marathon) getPort(task marathon.Task, applications []marathon.Application) string {
|
|
application, err := getApplication(task, applications)
|
|
if err != nil {
|
|
log.Errorf("Unable to get marathon application from task %s", task.AppID)
|
|
return ""
|
|
}
|
|
ports := processPorts(application, task)
|
|
if portIndexLabel, err := provider.getLabel(application, "traefik.portIndex"); err == nil {
|
|
if index, err := strconv.Atoi(portIndexLabel); err == nil {
|
|
return strconv.Itoa(ports[index])
|
|
}
|
|
}
|
|
if portValueLabel, err := provider.getLabel(application, "traefik.port"); err == nil {
|
|
return portValueLabel
|
|
}
|
|
|
|
for _, port := range ports {
|
|
return strconv.Itoa(port)
|
|
}
|
|
return ""
|
|
}
|
|
|
|
func (provider *Marathon) getWeight(task marathon.Task, applications []marathon.Application) string {
|
|
application, errApp := getApplication(task, applications)
|
|
if errApp != nil {
|
|
log.Errorf("Unable to get marathon application from task %s", task.AppID)
|
|
return "0"
|
|
}
|
|
if label, err := provider.getLabel(application, "traefik.weight"); err == nil {
|
|
return label
|
|
}
|
|
return "0"
|
|
}
|
|
|
|
func (provider *Marathon) getDomain(application marathon.Application) string {
|
|
if label, err := provider.getLabel(application, "traefik.domain"); err == nil {
|
|
return label
|
|
}
|
|
return provider.Domain
|
|
}
|
|
|
|
func (provider *Marathon) getProtocol(task marathon.Task, applications []marathon.Application) string {
|
|
application, errApp := getApplication(task, applications)
|
|
if errApp != nil {
|
|
log.Errorf("Unable to get marathon application from task %s", task.AppID)
|
|
return "http"
|
|
}
|
|
if label, err := provider.getLabel(application, "traefik.protocol"); err == nil {
|
|
return label
|
|
}
|
|
return "http"
|
|
}
|
|
|
|
func (provider *Marathon) getSticky(application marathon.Application) string {
|
|
if sticky, err := provider.getLabel(application, "traefik.backend.loadbalancer.sticky"); err == nil {
|
|
return sticky
|
|
}
|
|
return "false"
|
|
}
|
|
|
|
func (provider *Marathon) getPassHostHeader(application marathon.Application) string {
|
|
if passHostHeader, err := provider.getLabel(application, "traefik.frontend.passHostHeader"); err == nil {
|
|
return passHostHeader
|
|
}
|
|
return "true"
|
|
}
|
|
|
|
func (provider *Marathon) getPriority(application marathon.Application) string {
|
|
if priority, err := provider.getLabel(application, "traefik.frontend.priority"); err == nil {
|
|
return priority
|
|
}
|
|
return "0"
|
|
}
|
|
|
|
func (provider *Marathon) getEntryPoints(application marathon.Application) []string {
|
|
if entryPoints, err := provider.getLabel(application, "traefik.frontend.entryPoints"); err == nil {
|
|
return strings.Split(entryPoints, ",")
|
|
}
|
|
return []string{}
|
|
}
|
|
|
|
// getFrontendRule returns the frontend rule for the specified application, using
|
|
// it's label. It returns a default one (Host) if the label is not present.
|
|
func (provider *Marathon) getFrontendRule(application marathon.Application) string {
|
|
if label, err := provider.getLabel(application, "traefik.frontend.rule"); err == nil {
|
|
return label
|
|
}
|
|
if provider.MarathonLBCompatibility {
|
|
if label, err := provider.getLabel(application, "HAPROXY_0_VHOST"); err == nil {
|
|
return "Host:" + label
|
|
}
|
|
}
|
|
return "Host:" + provider.getSubDomain(application.ID) + "." + provider.Domain
|
|
}
|
|
|
|
func (provider *Marathon) getBackend(task marathon.Task, applications []marathon.Application) string {
|
|
application, errApp := getApplication(task, applications)
|
|
if errApp != nil {
|
|
log.Errorf("Unable to get marathon application from task %s", task.AppID)
|
|
return ""
|
|
}
|
|
return provider.getFrontendBackend(application)
|
|
}
|
|
|
|
func (provider *Marathon) getFrontendBackend(application marathon.Application) string {
|
|
if label, err := provider.getLabel(application, "traefik.backend"); err == nil {
|
|
return label
|
|
}
|
|
return replace("/", "-", application.ID)
|
|
}
|
|
|
|
func (provider *Marathon) getSubDomain(name string) string {
|
|
if provider.GroupsAsSubDomains {
|
|
splitedName := strings.Split(strings.TrimPrefix(name, "/"), "/")
|
|
reverseStringSlice(&splitedName)
|
|
reverseName := strings.Join(splitedName, ".")
|
|
return reverseName
|
|
}
|
|
return strings.Replace(strings.TrimPrefix(name, "/"), "/", "-", -1)
|
|
}
|
|
|
|
func (provider *Marathon) hasCircuitBreakerLabels(application marathon.Application) bool {
|
|
if _, err := provider.getLabel(application, "traefik.backend.circuitbreaker.expression"); err != nil {
|
|
return false
|
|
}
|
|
return true
|
|
}
|
|
|
|
func (provider *Marathon) hasLoadBalancerLabels(application marathon.Application) bool {
|
|
_, errMethod := provider.getLabel(application, "traefik.backend.loadbalancer.method")
|
|
_, errSticky := provider.getLabel(application, "traefik.backend.loadbalancer.sticky")
|
|
if errMethod != nil && errSticky != nil {
|
|
return false
|
|
}
|
|
return true
|
|
}
|
|
|
|
func (provider *Marathon) hasMaxConnLabels(application marathon.Application) bool {
|
|
if _, err := provider.getLabel(application, "traefik.backend.maxconn.amount"); err != nil {
|
|
return false
|
|
}
|
|
if _, err := provider.getLabel(application, "traefik.backend.maxconn.extractorfunc"); err != nil {
|
|
return false
|
|
}
|
|
return true
|
|
}
|
|
|
|
func (provider *Marathon) getMaxConnAmount(application marathon.Application) int64 {
|
|
if label, err := provider.getLabel(application, "traefik.backend.maxconn.amount"); err == nil {
|
|
i, errConv := strconv.ParseInt(label, 10, 64)
|
|
if errConv != nil {
|
|
log.Errorf("Unable to parse traefik.backend.maxconn.amount %s", label)
|
|
return math.MaxInt64
|
|
}
|
|
return i
|
|
}
|
|
return math.MaxInt64
|
|
}
|
|
|
|
func (provider *Marathon) getMaxConnExtractorFunc(application marathon.Application) string {
|
|
if label, err := provider.getLabel(application, "traefik.backend.maxconn.extractorfunc"); err == nil {
|
|
return label
|
|
}
|
|
return "request.host"
|
|
}
|
|
|
|
func (provider *Marathon) getLoadBalancerMethod(application marathon.Application) string {
|
|
if label, err := provider.getLabel(application, "traefik.backend.loadbalancer.method"); err == nil {
|
|
return label
|
|
}
|
|
return "wrr"
|
|
}
|
|
|
|
func (provider *Marathon) getCircuitBreakerExpression(application marathon.Application) string {
|
|
if label, err := provider.getLabel(application, "traefik.backend.circuitbreaker.expression"); err == nil {
|
|
return label
|
|
}
|
|
return "NetworkErrorRatio() > 1"
|
|
}
|
|
|
|
func processPorts(application marathon.Application, task marathon.Task) []int {
|
|
|
|
// Using default port configuration
|
|
if task.Ports != nil && len(task.Ports) > 0 {
|
|
return task.Ports
|
|
}
|
|
|
|
// Using port definition if available
|
|
if application.PortDefinitions != nil && len(*application.PortDefinitions) > 0 {
|
|
var ports []int
|
|
for _, def := range *application.PortDefinitions {
|
|
if def.Port != nil {
|
|
ports = append(ports, *def.Port)
|
|
}
|
|
}
|
|
return ports
|
|
}
|
|
// If using IP-per-task using this port definition
|
|
if application.IPAddressPerTask != nil && len(*((*application.IPAddressPerTask).Discovery).Ports) > 0 {
|
|
var ports []int
|
|
for _, def := range *((*application.IPAddressPerTask).Discovery).Ports {
|
|
ports = append(ports, def.Number)
|
|
}
|
|
return ports
|
|
}
|
|
|
|
return []int{}
|
|
}
|
|
|
|
func (provider *Marathon) getBackendServer(task marathon.Task, applications []marathon.Application) string {
|
|
application, err := getApplication(task, applications)
|
|
if err != nil {
|
|
log.Errorf("Unable to get marathon application from task %s", task.AppID)
|
|
return ""
|
|
}
|
|
if len(task.IPAddresses) == 0 {
|
|
return ""
|
|
} else if len(task.IPAddresses) == 1 {
|
|
return task.IPAddresses[0].IPAddress
|
|
} else {
|
|
ipAddressIdxStr, err := provider.getLabel(application, "traefik.ipAddressIdx")
|
|
if err != nil {
|
|
log.Errorf("Unable to get marathon IPAddress from task %s", task.AppID)
|
|
return ""
|
|
}
|
|
ipAddressIdx, err := strconv.Atoi(ipAddressIdxStr)
|
|
if err != nil {
|
|
log.Errorf("Invalid marathon IPAddress from task %s", task.AppID)
|
|
return ""
|
|
}
|
|
return task.IPAddresses[ipAddressIdx].IPAddress
|
|
}
|
|
}
|