mirror of
https://github.com/VictoriaMetrics/VictoriaMetrics.git
synced 2024-12-19 07:01:02 +01:00
5b8095a30a
Reasons for disabling http2:
- http2 is used very rarely comparing to http for Prometheus metrics exposition and service discovery
- http2 is much harder to debug than http
- http2 has very bad security record because of its complexity - see https://portswigger.net/research/http2
VictoriaMetrics components are compiled with nethttpomithttp2 tag because of these issues.
Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/4283
Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/4274
This is a follow-up for 72c3cd47eb
92 lines
2.8 KiB
Go
92 lines
2.8 KiB
Go
package http
|
|
|
|
import (
|
|
"encoding/json"
|
|
"fmt"
|
|
"net/http"
|
|
"net/url"
|
|
"strconv"
|
|
|
|
"github.com/VictoriaMetrics/VictoriaMetrics/lib/promscrape/discoveryutils"
|
|
"github.com/VictoriaMetrics/VictoriaMetrics/lib/promutils"
|
|
"github.com/VictoriaMetrics/metrics"
|
|
)
|
|
|
|
var configMap = discoveryutils.NewConfigMap()
|
|
|
|
type apiConfig struct {
|
|
client *discoveryutils.Client
|
|
path string
|
|
|
|
fetchErrors *metrics.Counter
|
|
parseErrors *metrics.Counter
|
|
}
|
|
|
|
// httpGroupTarget represent prometheus GroupTarget
|
|
// https://prometheus.io/docs/prometheus/latest/http_sd/
|
|
type httpGroupTarget struct {
|
|
Targets []string `json:"targets"`
|
|
Labels *promutils.Labels `json:"labels"`
|
|
}
|
|
|
|
func newAPIConfig(sdc *SDConfig, baseDir string) (*apiConfig, error) {
|
|
ac, err := sdc.HTTPClientConfig.NewConfig(baseDir)
|
|
if err != nil {
|
|
return nil, fmt.Errorf("cannot parse auth config: %w", err)
|
|
}
|
|
parsedURL, err := url.Parse(sdc.URL)
|
|
if err != nil {
|
|
return nil, fmt.Errorf("cannot parse http_sd URL: %w", err)
|
|
}
|
|
apiServer := fmt.Sprintf("%s://%s", parsedURL.Scheme, parsedURL.Host)
|
|
|
|
proxyAC, err := sdc.ProxyClientConfig.NewConfig(baseDir)
|
|
if err != nil {
|
|
return nil, fmt.Errorf("cannot parse proxy auth config: %w", err)
|
|
}
|
|
client, err := discoveryutils.NewClient(apiServer, ac, sdc.ProxyURL, proxyAC, &sdc.HTTPClientConfig)
|
|
if err != nil {
|
|
return nil, fmt.Errorf("cannot create HTTP client for %q: %w", apiServer, err)
|
|
}
|
|
cfg := &apiConfig{
|
|
client: client,
|
|
path: parsedURL.RequestURI(),
|
|
fetchErrors: metrics.GetOrCreateCounter(fmt.Sprintf(`promscrape_discovery_http_errors_total{type="fetch",url=%q}`, sdc.URL)),
|
|
parseErrors: metrics.GetOrCreateCounter(fmt.Sprintf(`promscrape_discovery_http_errors_total{type="parse",url=%q}`, sdc.URL)),
|
|
}
|
|
return cfg, nil
|
|
}
|
|
|
|
func getAPIConfig(sdc *SDConfig, baseDir string) (*apiConfig, error) {
|
|
v, err := configMap.Get(sdc, func() (interface{}, error) { return newAPIConfig(sdc, baseDir) })
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
return v.(*apiConfig), nil
|
|
}
|
|
|
|
func getHTTPTargets(cfg *apiConfig) ([]httpGroupTarget, error) {
|
|
data, err := cfg.client.GetAPIResponseWithReqParams(cfg.path, func(request *http.Request) {
|
|
request.Header.Set("X-Prometheus-Refresh-Interval-Seconds", strconv.FormatFloat(SDCheckInterval.Seconds(), 'f', 0, 64))
|
|
request.Header.Set("Accept", "application/json")
|
|
})
|
|
if err != nil {
|
|
cfg.fetchErrors.Inc()
|
|
return nil, fmt.Errorf("cannot read http_sd api response: %w", err)
|
|
}
|
|
tg, err := parseAPIResponse(data, cfg.path)
|
|
if err != nil {
|
|
cfg.parseErrors.Inc()
|
|
return nil, err
|
|
}
|
|
return tg, nil
|
|
}
|
|
|
|
func parseAPIResponse(data []byte, path string) ([]httpGroupTarget, error) {
|
|
var r []httpGroupTarget
|
|
if err := json.Unmarshal(data, &r); err != nil {
|
|
return nil, fmt.Errorf("cannot parse http_sd api response path: %s, err: %w", path, err)
|
|
}
|
|
return r, nil
|
|
}
|