traefik/old/configuration/provider_aggregator.go

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package configuration
import (
"encoding/json"
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"github.com/containous/traefik/old/log"
"github.com/containous/traefik/old/provider"
"github.com/containous/traefik/old/types"
"github.com/containous/traefik/safe"
)
// ProviderAggregator aggregate providers
type ProviderAggregator struct {
providers []provider.Provider
constraints types.Constraints
}
// NewProviderAggregator return an aggregate of all the providers configured in GlobalConfiguration
func NewProviderAggregator(gc *GlobalConfiguration) ProviderAggregator {
provider := ProviderAggregator{
constraints: gc.Constraints,
}
if gc.Docker != nil {
provider.quietAddProvider(gc.Docker)
}
if gc.Marathon != nil {
provider.quietAddProvider(gc.Marathon)
}
if gc.File != nil {
provider.quietAddProvider(gc.File)
}
if gc.Rest != nil {
provider.quietAddProvider(gc.Rest)
}
if gc.Consul != nil {
provider.quietAddProvider(gc.Consul)
}
if gc.ConsulCatalog != nil {
provider.quietAddProvider(gc.ConsulCatalog)
}
if gc.Etcd != nil {
provider.quietAddProvider(gc.Etcd)
}
if gc.Zookeeper != nil {
provider.quietAddProvider(gc.Zookeeper)
}
if gc.Boltdb != nil {
provider.quietAddProvider(gc.Boltdb)
}
if gc.Kubernetes != nil {
provider.quietAddProvider(gc.Kubernetes)
}
if gc.Mesos != nil {
provider.quietAddProvider(gc.Mesos)
}
if gc.Eureka != nil {
provider.quietAddProvider(gc.Eureka)
}
if gc.ECS != nil {
provider.quietAddProvider(gc.ECS)
}
if gc.Rancher != nil {
provider.quietAddProvider(gc.Rancher)
}
if gc.DynamoDB != nil {
provider.quietAddProvider(gc.DynamoDB)
}
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return provider
}
func (p *ProviderAggregator) quietAddProvider(provider provider.Provider) {
err := p.AddProvider(provider)
if err != nil {
log.Errorf("Error initializing provider %T: %v", provider, err)
}
}
// AddProvider add a provider in the providers map
func (p *ProviderAggregator) AddProvider(provider provider.Provider) error {
err := provider.Init(p.constraints)
if err != nil {
return err
}
p.providers = append(p.providers, provider)
return nil
}
// Init the provider
func (p ProviderAggregator) Init(_ types.Constraints) error {
return nil
}
// Provide call the provide method of every providers
func (p ProviderAggregator) Provide(configurationChan chan<- types.ConfigMessage, pool *safe.Pool) error {
for _, p := range p.providers {
jsonConf, err := json.Marshal(p)
if err != nil {
log.Debugf("Unable to marshal provider conf %T with error: %v", p, err)
}
log.Infof("Starting provider %T %s", p, jsonConf)
currentProvider := p
safe.Go(func() {
err := currentProvider.Provide(configurationChan, pool)
if err != nil {
log.Errorf("Error starting provider %T: %v", p, err)
}
})
}
return nil
}