Extract providers to their own package
This is just doing that and making it compile :) Signed-off-by: Vincent Demeester <vincent@sbr.pm>
This commit is contained in:
Vincent Demeester
parent
2d00758b2e
commit
542c3673e4
36 changed files with 861 additions and 833 deletions
227
provider/kv/kv.go
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227
provider/kv/kv.go
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@ -0,0 +1,227 @@
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package kv
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import (
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"errors"
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"fmt"
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"strings"
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"text/template"
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"time"
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"github.com/BurntSushi/ty/fun"
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"github.com/cenk/backoff"
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"github.com/containous/traefik/job"
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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/safe"
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"github.com/containous/traefik/types"
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"github.com/docker/libkv"
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"github.com/docker/libkv/store"
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)
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// Provider holds common configurations of key-value providers.
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type Provider struct {
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provider.BaseProvider `mapstructure:",squash"`
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Endpoint string `description:"Comma sepparated server endpoints"`
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Prefix string `description:"Prefix used for KV store"`
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TLS *provider.ClientTLS `description:"Enable TLS support"`
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StoreType store.Backend
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Kvclient store.Store
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}
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// CreateStore create the K/V store
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func (p *Provider) CreateStore() (store.Store, error) {
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storeConfig := &store.Config{
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ConnectionTimeout: 30 * time.Second,
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Bucket: "traefik",
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}
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if p.TLS != nil {
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var err error
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storeConfig.TLS, err = p.TLS.CreateTLSConfig()
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if err != nil {
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return nil, err
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}
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}
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return libkv.NewStore(
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p.StoreType,
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strings.Split(p.Endpoint, ","),
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storeConfig,
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)
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}
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func (p *Provider) watchKv(configurationChan chan<- types.ConfigMessage, prefix string, stop chan bool) error {
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operation := func() error {
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events, err := p.Kvclient.WatchTree(p.Prefix, make(chan struct{}))
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if err != nil {
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return fmt.Errorf("Failed to KV WatchTree: %v", err)
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}
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for {
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select {
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case <-stop:
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return nil
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case _, ok := <-events:
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if !ok {
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return errors.New("watchtree channel closed")
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}
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configuration := p.loadConfig()
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if configuration != nil {
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configurationChan <- types.ConfigMessage{
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ProviderName: string(p.StoreType),
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Configuration: configuration,
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}
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}
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}
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}
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}
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notify := func(err error, time time.Duration) {
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log.Errorf("KV connection error: %+v, retrying in %s", err, time)
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}
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err := backoff.RetryNotify(safe.OperationWithRecover(operation), job.NewBackOff(backoff.NewExponentialBackOff()), notify)
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if err != nil {
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return fmt.Errorf("Cannot connect to KV server: %v", err)
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}
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return nil
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}
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// Provide provides the configuration to traefik via the configuration channel
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func (p *Provider) Provide(configurationChan chan<- types.ConfigMessage, pool *safe.Pool, constraints types.Constraints) error {
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p.Constraints = append(p.Constraints, constraints...)
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operation := func() error {
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if _, err := p.Kvclient.Exists("qmslkjdfmqlskdjfmqlksjazçueznbvbwzlkajzebvkwjdcqmlsfj"); err != nil {
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return fmt.Errorf("Failed to test KV store connection: %v", err)
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}
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if p.Watch {
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pool.Go(func(stop chan bool) {
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err := p.watchKv(configurationChan, p.Prefix, stop)
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if err != nil {
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log.Errorf("Cannot watch KV store: %v", err)
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}
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})
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}
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configuration := p.loadConfig()
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configurationChan <- types.ConfigMessage{
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ProviderName: string(p.StoreType),
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Configuration: configuration,
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}
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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("KV connection error: %+v, retrying in %s", err, time)
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}
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err := backoff.RetryNotify(safe.OperationWithRecover(operation), job.NewBackOff(backoff.NewExponentialBackOff()), notify)
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if err != nil {
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return fmt.Errorf("Cannot connect to KV server: %v", err)
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}
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return nil
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}
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func (p *Provider) loadConfig() *types.Configuration {
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templateObjects := struct {
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Prefix string
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}{
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// Allow `/traefik/alias` to superesede `p.Prefix`
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strings.TrimSuffix(p.get(p.Prefix, p.Prefix+"/alias"), "/"),
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}
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var KvFuncMap = template.FuncMap{
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"List": p.list,
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"ListServers": p.listServers,
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"Get": p.get,
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"SplitGet": p.splitGet,
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"Last": p.last,
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}
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configuration, err := p.GetConfiguration("templates/kv.tmpl", KvFuncMap, templateObjects)
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if err != nil {
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log.Error(err)
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}
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for key, frontend := range configuration.Frontends {
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if _, ok := configuration.Backends[frontend.Backend]; ok == false {
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delete(configuration.Frontends, key)
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}
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}
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return configuration
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}
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func (p *Provider) list(keys ...string) []string {
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joinedKeys := strings.Join(keys, "")
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keysPairs, err := p.Kvclient.List(joinedKeys)
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if err != nil {
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log.Debugf("Cannot get keys %s %s ", joinedKeys, err)
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return nil
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}
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directoryKeys := make(map[string]string)
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for _, key := range keysPairs {
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directory := strings.Split(strings.TrimPrefix(key.Key, joinedKeys), "/")[0]
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directoryKeys[directory] = joinedKeys + directory
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}
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return fun.Values(directoryKeys).([]string)
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}
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func (p *Provider) listServers(backend string) []string {
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serverNames := p.list(backend, "/servers/")
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return fun.Filter(func(serverName string) bool {
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key := fmt.Sprint(serverName, "/url")
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if _, err := p.Kvclient.Get(key); err != nil {
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if err != store.ErrKeyNotFound {
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log.Errorf("Failed to retrieve value for key %s: %s", key, err)
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}
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return false
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}
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return p.checkConstraints(serverName, "/tags")
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}, serverNames).([]string)
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}
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func (p *Provider) get(defaultValue string, keys ...string) string {
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joinedKeys := strings.Join(keys, "")
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keyPair, err := p.Kvclient.Get(strings.TrimPrefix(joinedKeys, "/"))
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if err != nil {
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log.Debugf("Cannot get key %s %s, setting default %s", joinedKeys, err, defaultValue)
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return defaultValue
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} else if keyPair == nil {
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log.Debugf("Cannot get key %s, setting default %s", joinedKeys, defaultValue)
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return defaultValue
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}
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return string(keyPair.Value)
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}
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func (p *Provider) splitGet(keys ...string) []string {
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joinedKeys := strings.Join(keys, "")
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keyPair, err := p.Kvclient.Get(joinedKeys)
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if err != nil {
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log.Debugf("Cannot get key %s %s, setting default empty", joinedKeys, err)
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return []string{}
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} else if keyPair == nil {
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log.Debugf("Cannot get key %s, setting default %empty", joinedKeys)
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return []string{}
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}
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return strings.Split(string(keyPair.Value), ",")
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}
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func (p *Provider) last(key string) string {
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splittedKey := strings.Split(key, "/")
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return splittedKey[len(splittedKey)-1]
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}
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func (p *Provider) checkConstraints(keys ...string) bool {
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joinedKeys := strings.Join(keys, "")
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keyPair, err := p.Kvclient.Get(joinedKeys)
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value := ""
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if err == nil && keyPair != nil && keyPair.Value != nil {
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value = string(keyPair.Value)
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}
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constraintTags := strings.Split(value, ",")
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ok, failingConstraint := p.MatchConstraints(constraintTags)
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if ok == false {
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if failingConstraint != nil {
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log.Debugf("Constraint %v not matching with following tags: %v", failingConstraint.String(), value)
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}
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return false
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}
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return true
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}
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467
provider/kv/kv_test.go
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467
provider/kv/kv_test.go
Normal file
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@ -0,0 +1,467 @@
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package kv
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import (
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"errors"
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"reflect"
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"sort"
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"strings"
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"testing"
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"time"
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"github.com/containous/traefik/types"
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"github.com/docker/libkv/store"
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)
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func TestKvList(t *testing.T) {
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cases := []struct {
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provider *Provider
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keys []string
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expected []string
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}{
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{
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provider: &Provider{
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Kvclient: &Mock{},
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},
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keys: []string{},
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expected: []string{},
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},
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{
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provider: &Provider{
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Kvclient: &Mock{},
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},
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keys: []string{"traefik"},
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expected: []string{},
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},
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{
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provider: &Provider{
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Kvclient: &Mock{
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KVPairs: []*store.KVPair{
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{
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Key: "foo",
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Value: []byte("bar"),
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},
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},
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},
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},
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keys: []string{"bar"},
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expected: []string{},
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},
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{
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provider: &Provider{
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Kvclient: &Mock{
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KVPairs: []*store.KVPair{
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{
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Key: "foo",
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Value: []byte("bar"),
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},
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},
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},
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},
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keys: []string{"foo"},
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expected: []string{"foo"},
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},
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{
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provider: &Provider{
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Kvclient: &Mock{
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KVPairs: []*store.KVPair{
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{
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Key: "foo/baz/1",
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Value: []byte("bar"),
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},
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{
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Key: "foo/baz/2",
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Value: []byte("bar"),
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},
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{
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Key: "foo/baz/biz/1",
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Value: []byte("bar"),
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},
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},
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},
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},
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keys: []string{"foo", "/baz/"},
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expected: []string{"foo/baz/1", "foo/baz/2"},
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},
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}
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for _, c := range cases {
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actual := c.provider.list(c.keys...)
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sort.Strings(actual)
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sort.Strings(c.expected)
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if !reflect.DeepEqual(actual, c.expected) {
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t.Fatalf("expected %v, got %v for %v and %v", c.expected, actual, c.keys, c.provider)
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}
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}
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// Error case
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provider := &Provider{
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Kvclient: &Mock{
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Error: KvError{
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List: store.ErrKeyNotFound,
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},
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},
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}
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actual := provider.list("anything")
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if actual != nil {
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t.Fatalf("Should have return nil, got %v", actual)
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}
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}
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func TestKvGet(t *testing.T) {
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cases := []struct {
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provider *Provider
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keys []string
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expected string
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}{
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{
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provider: &Provider{
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Kvclient: &Mock{},
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},
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keys: []string{},
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expected: "",
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},
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{
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provider: &Provider{
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Kvclient: &Mock{},
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},
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keys: []string{"traefik"},
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expected: "",
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},
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{
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provider: &Provider{
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Kvclient: &Mock{
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KVPairs: []*store.KVPair{
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{
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Key: "foo",
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Value: []byte("bar"),
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},
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},
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},
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},
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keys: []string{"bar"},
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expected: "",
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},
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{
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provider: &Provider{
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Kvclient: &Mock{
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KVPairs: []*store.KVPair{
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{
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Key: "foo",
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Value: []byte("bar"),
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},
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},
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},
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},
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keys: []string{"foo"},
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expected: "bar",
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},
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{
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provider: &Provider{
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Kvclient: &Mock{
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KVPairs: []*store.KVPair{
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{
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Key: "foo/baz/1",
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Value: []byte("bar1"),
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},
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{
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Key: "foo/baz/2",
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Value: []byte("bar2"),
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},
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{
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Key: "foo/baz/biz/1",
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Value: []byte("bar3"),
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},
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},
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},
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},
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keys: []string{"foo", "/baz/", "2"},
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expected: "bar2",
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},
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}
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for _, c := range cases {
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actual := c.provider.get("", c.keys...)
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if actual != c.expected {
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t.Fatalf("expected %v, got %v for %v and %v", c.expected, actual, c.keys, c.provider)
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}
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}
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// Error case
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provider := &Provider{
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Kvclient: &Mock{
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Error: KvError{
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Get: store.ErrKeyNotFound,
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},
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},
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}
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actual := provider.get("", "anything")
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if actual != "" {
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t.Fatalf("Should have return nil, got %v", actual)
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}
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}
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func TestKvLast(t *testing.T) {
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cases := []struct {
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key string
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expected string
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}{
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{
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key: "",
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expected: "",
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},
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{
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key: "foo",
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expected: "foo",
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},
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{
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key: "foo/bar",
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expected: "bar",
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},
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{
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key: "foo/bar/baz",
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expected: "baz",
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},
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// FIXME is this wanted ?
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{
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key: "foo/bar/",
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expected: "",
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},
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}
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provider := &Provider{}
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for _, c := range cases {
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actual := provider.last(c.key)
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if actual != c.expected {
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t.Fatalf("expected %s, got %s", c.expected, actual)
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}
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}
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}
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type KvMock struct {
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Provider
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}
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func (provider *KvMock) loadConfig() *types.Configuration {
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return nil
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}
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func TestKvWatchTree(t *testing.T) {
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returnedChans := make(chan chan []*store.KVPair)
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provider := &KvMock{
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Provider{
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Kvclient: &Mock{
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WatchTreeMethod: func() <-chan []*store.KVPair {
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c := make(chan []*store.KVPair, 10)
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returnedChans <- c
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return c
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},
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},
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},
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}
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configChan := make(chan types.ConfigMessage)
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go func() {
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provider.watchKv(configChan, "prefix", make(chan bool, 1))
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}()
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select {
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case c1 := <-returnedChans:
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c1 <- []*store.KVPair{}
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<-configChan
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close(c1) // WatchTree chans can close due to error
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case <-time.After(1 * time.Second):
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t.Fatalf("Failed to create a new WatchTree chan")
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}
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select {
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case c2 := <-returnedChans:
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c2 <- []*store.KVPair{}
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<-configChan
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case <-time.After(1 * time.Second):
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t.Fatalf("Failed to create a new WatchTree chan")
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}
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select {
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case _ = <-configChan:
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t.Fatalf("configChan should be empty")
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default:
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}
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}
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|
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// Override Get/List to return a error
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type KvError struct {
|
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Get error
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List error
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}
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|
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// Extremely limited mock store so we can test initialization
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type Mock struct {
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Error KvError
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KVPairs []*store.KVPair
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WatchTreeMethod func() <-chan []*store.KVPair
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}
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func (s *Mock) Put(key string, value []byte, opts *store.WriteOptions) error {
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return errors.New("Put not supported")
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}
|
||||
|
||||
func (s *Mock) Get(key string) (*store.KVPair, error) {
|
||||
if err := s.Error.Get; err != nil {
|
||||
return nil, err
|
||||
}
|
||||
for _, kvPair := range s.KVPairs {
|
||||
if kvPair.Key == key {
|
||||
return kvPair, nil
|
||||
}
|
||||
}
|
||||
return nil, store.ErrKeyNotFound
|
||||
}
|
||||
|
||||
func (s *Mock) Delete(key string) error {
|
||||
return errors.New("Delete not supported")
|
||||
}
|
||||
|
||||
// Exists mock
|
||||
func (s *Mock) Exists(key string) (bool, error) {
|
||||
return false, errors.New("Exists not supported")
|
||||
}
|
||||
|
||||
// Watch mock
|
||||
func (s *Mock) Watch(key string, stopCh <-chan struct{}) (<-chan *store.KVPair, error) {
|
||||
return nil, errors.New("Watch not supported")
|
||||
}
|
||||
|
||||
// WatchTree mock
|
||||
func (s *Mock) WatchTree(prefix string, stopCh <-chan struct{}) (<-chan []*store.KVPair, error) {
|
||||
return s.WatchTreeMethod(), nil
|
||||
}
|
||||
|
||||
// NewLock mock
|
||||
func (s *Mock) NewLock(key string, options *store.LockOptions) (store.Locker, error) {
|
||||
return nil, errors.New("NewLock not supported")
|
||||
}
|
||||
|
||||
// List mock
|
||||
func (s *Mock) List(prefix string) ([]*store.KVPair, error) {
|
||||
if err := s.Error.List; err != nil {
|
||||
return nil, err
|
||||
}
|
||||
kv := []*store.KVPair{}
|
||||
for _, kvPair := range s.KVPairs {
|
||||
if strings.HasPrefix(kvPair.Key, prefix) && !strings.ContainsAny(strings.TrimPrefix(kvPair.Key, prefix), "/") {
|
||||
kv = append(kv, kvPair)
|
||||
}
|
||||
}
|
||||
return kv, nil
|
||||
}
|
||||
|
||||
// DeleteTree mock
|
||||
func (s *Mock) DeleteTree(prefix string) error {
|
||||
return errors.New("DeleteTree not supported")
|
||||
}
|
||||
|
||||
// AtomicPut mock
|
||||
func (s *Mock) AtomicPut(key string, value []byte, previous *store.KVPair, opts *store.WriteOptions) (bool, *store.KVPair, error) {
|
||||
return false, nil, errors.New("AtomicPut not supported")
|
||||
}
|
||||
|
||||
// AtomicDelete mock
|
||||
func (s *Mock) AtomicDelete(key string, previous *store.KVPair) (bool, error) {
|
||||
return false, errors.New("AtomicDelete not supported")
|
||||
}
|
||||
|
||||
// Close mock
|
||||
func (s *Mock) Close() {
|
||||
return
|
||||
}
|
||||
|
||||
func TestKVLoadConfig(t *testing.T) {
|
||||
provider := &Provider{
|
||||
Prefix: "traefik",
|
||||
Kvclient: &Mock{
|
||||
KVPairs: []*store.KVPair{
|
||||
{
|
||||
Key: "traefik/frontends/frontend.with.dot",
|
||||
Value: []byte(""),
|
||||
},
|
||||
{
|
||||
Key: "traefik/frontends/frontend.with.dot/backend",
|
||||
Value: []byte("backend.with.dot.too"),
|
||||
},
|
||||
{
|
||||
Key: "traefik/frontends/frontend.with.dot/routes",
|
||||
Value: []byte(""),
|
||||
},
|
||||
{
|
||||
Key: "traefik/frontends/frontend.with.dot/routes/route.with.dot",
|
||||
Value: []byte(""),
|
||||
},
|
||||
{
|
||||
Key: "traefik/frontends/frontend.with.dot/routes/route.with.dot/rule",
|
||||
Value: []byte("Host:test.localhost"),
|
||||
},
|
||||
{
|
||||
Key: "traefik/backends/backend.with.dot.too",
|
||||
Value: []byte(""),
|
||||
},
|
||||
{
|
||||
Key: "traefik/backends/backend.with.dot.too/servers",
|
||||
Value: []byte(""),
|
||||
},
|
||||
{
|
||||
Key: "traefik/backends/backend.with.dot.too/servers/server.with.dot",
|
||||
Value: []byte(""),
|
||||
},
|
||||
{
|
||||
Key: "traefik/backends/backend.with.dot.too/servers/server.with.dot/url",
|
||||
Value: []byte("http://172.17.0.2:80"),
|
||||
},
|
||||
{
|
||||
Key: "traefik/backends/backend.with.dot.too/servers/server.with.dot/weight",
|
||||
Value: []byte("0"),
|
||||
},
|
||||
{
|
||||
Key: "traefik/backends/backend.with.dot.too/servers/server.with.dot.without.url",
|
||||
Value: []byte(""),
|
||||
},
|
||||
{
|
||||
Key: "traefik/backends/backend.with.dot.too/servers/server.with.dot.without.url/weight",
|
||||
Value: []byte("0"),
|
||||
},
|
||||
},
|
||||
},
|
||||
}
|
||||
actual := provider.loadConfig()
|
||||
expected := &types.Configuration{
|
||||
Backends: map[string]*types.Backend{
|
||||
"backend.with.dot.too": {
|
||||
Servers: map[string]types.Server{
|
||||
"server.with.dot": {
|
||||
URL: "http://172.17.0.2:80",
|
||||
Weight: 0,
|
||||
},
|
||||
},
|
||||
CircuitBreaker: nil,
|
||||
LoadBalancer: nil,
|
||||
},
|
||||
},
|
||||
Frontends: map[string]*types.Frontend{
|
||||
"frontend.with.dot": {
|
||||
Backend: "backend.with.dot.too",
|
||||
PassHostHeader: true,
|
||||
EntryPoints: []string{},
|
||||
Routes: map[string]types.Route{
|
||||
"route.with.dot": {
|
||||
Rule: "Host:test.localhost",
|
||||
},
|
||||
},
|
||||
},
|
||||
},
|
||||
}
|
||||
if !reflect.DeepEqual(actual.Backends, expected.Backends) {
|
||||
t.Fatalf("expected %+v, got %+v", expected.Backends, actual.Backends)
|
||||
}
|
||||
if !reflect.DeepEqual(actual.Frontends, expected.Frontends) {
|
||||
t.Fatalf("expected %+v, got %+v", expected.Frontends, actual.Frontends)
|
||||
}
|
||||
}
|
||||
Loading…
Add table
Add a link
Reference in a new issue