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// _ _
// __ _____ __ ___ ___ __ _| |_ ___
// \ \ /\ / / _ \/ _` \ \ / / |/ _` | __/ _ \
// \ V V / __/ (_| |\ V /| | (_| | || __/
// \_/\_/ \___|\__,_| \_/ |_|\__,_|\__\___|
//
// Copyright © 2016 - 2024 Weaviate B.V. All rights reserved.
//
// CONTACT: [email protected]
//
package clients
import (
"context"
"net/http"
"strings"
"sync"
"time"
"github.com/pkg/errors"
)
func (v *vectorizer) WaitForStartup(initCtx context.Context,
interval time.Duration,
) error {
endpoints := map[string]string{}
if v.originPassage != v.originQuery {
endpoints["passage"] = v.urlPassage("/.well-known/ready")
endpoints["query"] = v.urlQuery("/.well-known/ready")
} else {
endpoints[""] = v.urlPassage("/.well-known/ready")
}
ch := make(chan error, len(endpoints))
var wg sync.WaitGroup
for serviceName, endpoint := range endpoints {
wg.Add(1)
go func(serviceName string, endpoint string) {
defer wg.Done()
if err := v.waitFor(initCtx, interval, endpoint, serviceName); err != nil {
ch <- err
}
}(serviceName, endpoint)
}
wg.Wait()
close(ch)
if len(ch) > 0 {
var errs []string
for err := range ch {
errs = append(errs, err.Error())
}
return errors.Errorf(strings.Join(errs, ", "))
}
return nil
}
func (v *vectorizer) waitFor(initCtx context.Context, interval time.Duration, endpoint string, serviceName string) error {
ticker := time.NewTicker(interval)
defer ticker.Stop()
expired := initCtx.Done()
var lastErr error
prefix := ""
if serviceName != "" {
prefix = "[" + serviceName + "] "
}
for {
select {
case <-ticker.C:
lastErr = v.checkReady(initCtx, endpoint, serviceName)
if lastErr == nil {
return nil
}
v.logger.
WithField("action", "transformer_remote_wait_for_startup").
WithError(lastErr).Warnf("%stransformer remote inference service not ready", prefix)
case <-expired:
return errors.Wrapf(lastErr, "%sinit context expired before remote was ready", prefix)
}
}
}
func (v *vectorizer) checkReady(initCtx context.Context, endpoint string, serviceName string) error {
// spawn a new context (derived on the overall context) which is used to
// consider an individual request timed out
// due to parent timeout being superior over request's one, request can be cancelled by parent timeout
// resulting in "send check ready request" even if service is responding with non 2xx http code
requestCtx, cancel := context.WithTimeout(initCtx, 500*time.Millisecond)
defer cancel()
req, err := http.NewRequestWithContext(requestCtx, http.MethodGet, endpoint, nil)
if err != nil {
return errors.Wrap(err, "create check ready request")
}
res, err := v.httpClient.Do(req)
if err != nil {
return errors.Wrap(err, "send check ready request")
}
defer res.Body.Close()
if res.StatusCode > 299 {
return errors.Errorf("not ready: status %d", res.StatusCode)
}
return nil
}
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