86 lines
2.4 KiB
Go
86 lines
2.4 KiB
Go
package eureka
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import (
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"io/ioutil"
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"time"
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"github.com/ArthurHlt/go-eureka-client/eureka"
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"github.com/cenk/backoff"
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"github.com/containous/flaeg"
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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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)
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// Provider holds configuration of the Provider provider.
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type Provider struct {
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provider.BaseProvider `mapstructure:",squash" export:"true"`
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Endpoint string `description:"Eureka server endpoint"`
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Delay flaeg.Duration `description:"Override default configuration time between refresh" export:"true"`
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}
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// Provide allows the eureka provider to provide configurations to traefik
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// using the given configuration channel.
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func (p *Provider) Provide(configurationChan chan<- types.ConfigMessage, pool *safe.Pool, _ types.Constraints) error {
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eureka.GetLogger().SetOutput(ioutil.Discard)
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operation := func() error {
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client := eureka.NewClient([]string{p.Endpoint})
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applications, err := client.GetApplications()
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if err != nil {
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log.Errorf("Failed to retrieve applications, error: %s", err)
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return err
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}
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configuration, err := p.buildConfiguration(applications)
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if err != nil {
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log.Errorf("Failed to build configuration for Provider, error: %s", err)
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return err
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}
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configurationChan <- types.ConfigMessage{
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ProviderName: "eureka",
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Configuration: configuration,
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}
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ticker := time.NewTicker(time.Duration(p.Delay))
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safe.Go(func() {
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for t := range ticker.C {
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log.Debugf("Refreshing Provider %s", t.String())
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applications, err := client.GetApplications()
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if err != nil {
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log.Errorf("Failed to retrieve applications, error: %s", err)
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continue
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}
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configuration, err := p.buildConfiguration(applications)
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if err != nil {
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log.Errorf("Failed to refresh Provider configuration, error: %s", err)
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continue
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}
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configurationChan <- types.ConfigMessage{
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ProviderName: "eureka",
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Configuration: configuration,
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}
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}
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})
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return nil
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}
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err := backoff.RetryNotify(operation, job.NewBackOff(backoff.NewExponentialBackOff()), notify)
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if err != nil {
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log.Errorf("Cannot connect to Provider server %+v", err)
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return err
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}
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return nil
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}
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func notify(err error, time time.Duration) {
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log.Errorf("Provider connection error %+v, retrying in %s", err, time)
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}
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