2015-11-01 15:35:01 +00:00
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package provider
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2015-09-12 13:10:03 +00:00
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2015-09-07 22:15:14 +00:00
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import (
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2015-09-15 20:32:09 +00:00
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"errors"
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2015-09-24 15:16:13 +00:00
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"strconv"
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"strings"
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"text/template"
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"time"
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2015-09-10 20:54:37 +00:00
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"github.com/BurntSushi/ty/fun"
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2015-09-24 12:32:37 +00:00
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log "github.com/Sirupsen/logrus"
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2015-09-15 20:32:09 +00:00
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"github.com/cenkalti/backoff"
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2016-02-24 15:43:39 +00:00
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"github.com/containous/traefik/types"
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2015-09-12 13:10:03 +00:00
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"github.com/fsouza/go-dockerclient"
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2015-09-07 08:38:58 +00:00
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)
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2015-09-09 20:39:08 +00:00
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2015-11-01 18:29:47 +00:00
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// Docker holds configurations of the Docker provider.
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2015-11-02 18:48:34 +00:00
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type Docker struct {
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2016-01-13 21:46:44 +00:00
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BaseProvider `mapstructure:",squash"`
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Endpoint string
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Domain string
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TLS *DockerTLS
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2015-11-20 15:05:06 +00:00
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}
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// DockerTLS holds TLS specific configurations
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type DockerTLS struct {
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CA string
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Cert string
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Key string
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InsecureSkipVerify bool
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2015-09-09 20:39:08 +00:00
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}
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2015-11-01 18:29:47 +00:00
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// Provide allows the provider to provide configurations to traefik
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// using the given configuration channel.
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2015-11-02 18:48:34 +00:00
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func (provider *Docker) Provide(configurationChan chan<- types.ConfigMessage) error {
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2016-02-25 17:30:13 +00:00
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go func() {
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operation := func() error {
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var dockerClient *docker.Client
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var err error
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2015-11-01 18:29:47 +00:00
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2016-02-25 17:30:13 +00:00
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if provider.TLS != nil {
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dockerClient, err = docker.NewTLSClient(provider.Endpoint,
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provider.TLS.Cert, provider.TLS.Key, provider.TLS.CA)
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if err == nil {
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dockerClient.TLSConfig.InsecureSkipVerify = provider.TLS.InsecureSkipVerify
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}
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} else {
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dockerClient, err = docker.NewClient(provider.Endpoint)
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}
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if err != nil {
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log.Errorf("Failed to create a client for docker, error: %s", err)
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return err
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}
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err = dockerClient.Ping()
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if err != nil {
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log.Errorf("Docker connection error %+v", err)
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return err
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}
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log.Debug("Docker connection established")
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configuration := provider.loadDockerConfig(listContainers(dockerClient))
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configurationChan <- types.ConfigMessage{
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ProviderName: "docker",
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Configuration: configuration,
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}
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if provider.Watch {
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dockerEvents := make(chan *docker.APIEvents)
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dockerClient.AddEventListener(dockerEvents)
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log.Debug("Docker listening")
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2015-11-01 18:29:47 +00:00
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for {
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event := <-dockerEvents
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if event == nil {
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return errors.New("Docker event nil")
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// log.Fatalf("Docker connection error")
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}
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if event.Status == "start" || event.Status == "die" {
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log.Debugf("Docker event receveived %+v", event)
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2015-11-13 10:50:32 +00:00
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configuration := provider.loadDockerConfig(listContainers(dockerClient))
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2015-11-01 18:29:47 +00:00
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if configuration != nil {
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2015-11-13 10:50:32 +00:00
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configurationChan <- types.ConfigMessage{
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ProviderName: "docker",
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Configuration: configuration,
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}
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2015-09-10 20:54:37 +00:00
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}
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2015-09-10 07:06:37 +00:00
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}
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2015-09-09 20:39:08 +00:00
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}
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2015-11-01 18:29:47 +00:00
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}
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2016-02-25 17:30:13 +00:00
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return nil
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}
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notify := func(err error, time time.Duration) {
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log.Errorf("Docker connection error %+v, retrying in %s", err, time)
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}
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err := backoff.RetryNotify(operation, backoff.NewExponentialBackOff(), notify)
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if err != nil {
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log.Fatalf("Cannot connect to docker server %+v", err)
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}
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}()
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2015-11-01 18:29:47 +00:00
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2015-10-01 10:04:25 +00:00
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return nil
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2015-09-07 08:38:58 +00:00
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}
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2015-11-13 10:50:32 +00:00
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func (provider *Docker) loadDockerConfig(containersInspected []docker.Container) *types.Configuration {
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2015-10-08 19:21:51 +00:00
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var DockerFuncMap = template.FuncMap{
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2015-11-13 10:50:32 +00:00
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"getBackend": provider.getBackend,
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"getPort": provider.getPort,
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"getWeight": provider.getWeight,
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"getDomain": provider.getDomain,
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"getProtocol": provider.getProtocol,
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"getPassHostHeader": provider.getPassHostHeader,
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2016-02-01 15:08:58 +00:00
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"getEntryPoints": provider.getEntryPoints,
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2015-11-13 10:50:32 +00:00
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"getFrontendRule": provider.getFrontendRule,
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"replace": replace,
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2015-09-10 20:54:37 +00:00
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}
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// filter containers
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2015-11-13 10:50:32 +00:00
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filteredContainers := fun.Filter(containerFilter, containersInspected).([]docker.Container)
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2015-09-10 20:54:37 +00:00
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2015-11-13 10:50:32 +00:00
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frontends := map[string][]docker.Container{}
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2015-09-10 20:54:37 +00:00
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for _, container := range filteredContainers {
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2015-10-23 07:49:19 +00:00
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frontends[provider.getFrontendName(container)] = append(frontends[provider.getFrontendName(container)], container)
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2015-09-07 08:38:58 +00:00
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}
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2015-09-09 14:49:51 +00:00
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templateObjects := struct {
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2015-09-07 08:38:58 +00:00
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Containers []docker.Container
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2015-10-23 07:49:19 +00:00
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Frontends map[string][]docker.Container
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2015-09-09 15:50:02 +00:00
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Domain string
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2015-09-07 08:38:58 +00:00
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}{
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2015-09-10 20:54:37 +00:00
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filteredContainers,
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frontends,
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2015-09-09 15:10:43 +00:00
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provider.Domain,
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2015-09-07 08:38:58 +00:00
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}
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2015-11-13 10:50:32 +00:00
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configuration, err := provider.getConfiguration("templates/docker.tmpl", DockerFuncMap, templateObjects)
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2015-09-07 08:38:58 +00:00
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if err != nil {
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2015-11-13 10:50:32 +00:00
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log.Error(err)
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2015-09-07 08:38:58 +00:00
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}
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2015-11-13 10:50:32 +00:00
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return configuration
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}
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2015-09-07 08:38:58 +00:00
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2015-11-13 10:50:32 +00:00
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func containerFilter(container docker.Container) bool {
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if len(container.NetworkSettings.Ports) == 0 {
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log.Debugf("Filtering container without port %s", container.Name)
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return false
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2015-09-07 08:38:58 +00:00
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}
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2015-11-13 10:50:32 +00:00
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_, err := strconv.Atoi(container.Config.Labels["traefik.port"])
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if len(container.NetworkSettings.Ports) > 1 && err != nil {
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log.Debugf("Filtering container with more than 1 port and no traefik.port label %s", container.Name)
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return false
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}
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if container.Config.Labels["traefik.enable"] == "false" {
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log.Debugf("Filtering disabled container %s", container.Name)
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return false
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}
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2016-03-27 00:05:17 +00:00
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// labels, err := getLabels(container, []string{"traefik.frontend.rule"})
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// if len(labels) != 0 && err != nil {
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// log.Debugf("Filtering bad labeled container %s", container.Name)
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// return false
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// }
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2015-11-13 10:50:32 +00:00
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return true
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2015-09-09 14:49:51 +00:00
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}
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2015-11-02 18:48:34 +00:00
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func (provider *Docker) getFrontendName(container docker.Container) string {
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2015-10-23 07:49:19 +00:00
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// Replace '.' with '-' in quoted keys because of this issue https://github.com/BurntSushi/toml/issues/78
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2016-03-27 00:05:17 +00:00
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return normalize(provider.getFrontendRule(container))
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2015-10-23 07:49:19 +00:00
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}
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2015-11-13 10:50:32 +00:00
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// GetFrontendRule returns the frontend rule for the specified container, using
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// it's label. It returns a default one (Host) if the label is not present.
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func (provider *Docker) getFrontendRule(container docker.Container) string {
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if label, err := getLabel(container, "traefik.frontend.rule"); err == nil {
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return label
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}
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2016-03-27 00:05:17 +00:00
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return "Host:" + getEscapedName(container.Name) + "." + provider.Domain
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2015-11-13 10:50:32 +00:00
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}
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func (provider *Docker) getBackend(container docker.Container) string {
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if label, err := getLabel(container, "traefik.backend"); err == nil {
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return label
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}
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2016-03-27 00:05:17 +00:00
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return normalize(container.Name)
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2015-11-13 10:50:32 +00:00
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}
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func (provider *Docker) getPort(container docker.Container) string {
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if label, err := getLabel(container, "traefik.port"); err == nil {
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return label
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}
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for key := range container.NetworkSettings.Ports {
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return key.Port()
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}
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return ""
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}
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func (provider *Docker) getWeight(container docker.Container) string {
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if label, err := getLabel(container, "traefik.weight"); err == nil {
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return label
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}
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2016-03-27 00:05:17 +00:00
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return "1"
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2015-11-13 10:50:32 +00:00
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}
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func (provider *Docker) getDomain(container docker.Container) string {
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if label, err := getLabel(container, "traefik.domain"); err == nil {
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return label
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}
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return provider.Domain
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2015-10-23 07:49:19 +00:00
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}
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2015-11-13 10:50:32 +00:00
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func (provider *Docker) getProtocol(container docker.Container) string {
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if label, err := getLabel(container, "traefik.protocol"); err == nil {
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return label
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}
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return "http"
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}
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func (provider *Docker) getPassHostHeader(container docker.Container) string {
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if passHostHeader, err := getLabel(container, "traefik.frontend.passHostHeader"); err == nil {
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return passHostHeader
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}
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return "false"
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}
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2016-02-01 15:08:58 +00:00
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func (provider *Docker) getEntryPoints(container docker.Container) []string {
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if entryPoints, err := getLabel(container, "traefik.frontend.entryPoints"); err == nil {
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return strings.Split(entryPoints, ",")
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}
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return []string{}
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}
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2015-11-13 10:50:32 +00:00
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func getLabel(container docker.Container, label string) (string, error) {
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2015-09-09 14:49:51 +00:00
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for key, value := range container.Config.Labels {
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2015-10-23 07:49:19 +00:00
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if key == label {
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return value, nil
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2015-09-09 14:49:51 +00:00
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}
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}
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2015-10-23 07:49:19 +00:00
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return "", errors.New("Label not found:" + label)
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}
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2015-11-13 10:50:32 +00:00
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func getLabels(container docker.Container, labels []string) (map[string]string, error) {
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2015-11-05 14:14:25 +00:00
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var globalErr error
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2015-10-26 23:26:35 +00:00
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foundLabels := map[string]string{}
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for _, label := range labels {
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2015-11-13 10:50:32 +00:00
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foundLabel, err := getLabel(container, label)
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2015-11-05 14:14:25 +00:00
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// Error out only if one of them is defined.
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2015-11-01 18:29:47 +00:00
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if err != nil {
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2015-11-05 14:14:25 +00:00
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globalErr = errors.New("Label not found: " + label)
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continue
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2015-10-26 23:26:35 +00:00
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}
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2015-11-01 18:29:47 +00:00
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foundLabels[label] = foundLabel
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2015-11-05 14:14:25 +00:00
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2015-10-26 23:26:35 +00:00
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}
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2015-11-05 14:14:25 +00:00
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return foundLabels, globalErr
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2015-10-26 23:26:35 +00:00
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}
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2015-11-13 10:50:32 +00:00
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func listContainers(dockerClient *docker.Client) []docker.Container {
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containerList, _ := dockerClient.ListContainers(docker.ListContainersOptions{})
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containersInspected := []docker.Container{}
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2015-10-23 07:49:19 +00:00
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2015-11-13 10:50:32 +00:00
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// get inspect containers
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for _, container := range containerList {
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containerInspected, _ := dockerClient.InspectContainer(container.ID)
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containersInspected = append(containersInspected, *containerInspected)
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2015-10-23 07:49:19 +00:00
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}
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2015-11-13 10:50:32 +00:00
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return containersInspected
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2015-09-12 13:10:03 +00:00
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}
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