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helper: request another PD if one of them is unavailable #35750

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merged 4 commits into from
Jun 28, 2022
Merged

helper: request another PD if one of them is unavailable #35750

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7bb6cb4
helper: request another PD if one of them is unavailable
tangenta Jun 27, 2022
2fc6eb6
helper: log warning if a PD request is failed
tangenta Jun 28, 2022
cd1d4ac
add 'failed' to warnings
tangenta Jun 28, 2022
fb094d5
Merge branch 'master' into pd-HA
ti-chi-bot Jun 28, 2022
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12 changes: 9 additions & 3 deletions store/helper/helper.go
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Original file line number Diff line number Diff line change
Expand Up @@ -851,23 +851,29 @@ func (h *Helper) requestPD(apiName, method, uri string, body io.Reader, res inte
}

func requestPDForOneHost(host, apiName, method, uri string, body io.Reader, res interface{}) error {
logutil.BgLogger().Debug("RequestPD URL", zap.String("url", util.InternalHTTPSchema()+"://"+host+uri))
req, err := http.NewRequest(method, util.InternalHTTPSchema()+"://"+host+uri, body)
urlVar := fmt.Sprintf("%s://%s%s", util.InternalHTTPSchema(), host, uri)
logutil.BgLogger().Debug("RequestPD URL", zap.String("url", urlVar))
req, err := http.NewRequest(method, urlVar, body)
if err != nil {
logutil.BgLogger().Warn("requestPDForOneHost new request",
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zap.String("url", urlVar), zap.Error(err))
return errors.Trace(err)
}
start := time.Now()
resp, err := util.InternalHTTPClient().Do(req)
if err != nil {
metrics.PDAPIRequestCounter.WithLabelValues(apiName, "network error").Inc()
logutil.BgLogger().Warn("requestPDForOneHost do request",
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zap.String("url", urlVar), zap.Error(err))
return errors.Trace(err)
}
metrics.PDAPIExecutionHistogram.WithLabelValues(apiName).Observe(time.Since(start).Seconds())
metrics.PDAPIRequestCounter.WithLabelValues(apiName, resp.Status).Inc()
defer func() {
err = resp.Body.Close()
if err != nil {
logutil.BgLogger().Error("close body failed", zap.Error(err))
logutil.BgLogger().Warn("requestPDForOneHost close body",
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zap.String("url", urlVar), zap.Error(err))
}
}()
err = json.NewDecoder(resp.Body).Decode(res)
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