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81 lines
2.2 KiB
Go
81 lines
2.2 KiB
Go
// Copyright (c) 2015-2022 MinIO, Inc.
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//
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// This file is part of MinIO Object Storage stack
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Affero General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Affero General Public License for more details.
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//
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// You should have received a copy of the GNU Affero General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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package rest
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import (
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"net/http"
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"net/http/httptrace"
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"sync/atomic"
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"time"
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)
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var globalStats = struct {
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errs uint64
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tcpDialErrs uint64
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tcpDialCount uint64
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tcpDialTotalDur uint64
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}{}
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// RPCStats holds information about the DHCP/TCP metrics and errors
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type RPCStats struct {
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Errs uint64
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DialAvgDuration uint64
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DialErrs uint64
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}
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// GetRPCStats returns RPC stats, include calls errors and dhcp/tcp metrics
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func GetRPCStats() RPCStats {
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s := RPCStats{
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Errs: atomic.LoadUint64(&globalStats.errs),
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DialErrs: atomic.LoadUint64(&globalStats.tcpDialErrs),
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}
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if v := atomic.LoadUint64(&globalStats.tcpDialCount); v > 0 {
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s.DialAvgDuration = atomic.LoadUint64(&globalStats.tcpDialTotalDur) / v
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}
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return s
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}
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// Return a function which update the global stats related to tcp connections
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func setupReqStatsUpdate(req *http.Request) (*http.Request, func()) {
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var dialStart, dialEnd time.Time
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trace := &httptrace.ClientTrace{
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ConnectStart: func(network, addr string) {
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dialStart = time.Now()
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},
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ConnectDone: func(network, addr string, err error) {
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if err == nil {
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dialEnd = time.Now()
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}
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},
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}
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return req.WithContext(httptrace.WithClientTrace(req.Context(), trace)), func() {
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if !dialStart.IsZero() {
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if dialEnd.IsZero() {
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atomic.AddUint64(&globalStats.tcpDialErrs, 1)
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} else {
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atomic.AddUint64(&globalStats.tcpDialCount, 1)
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atomic.AddUint64(&globalStats.tcpDialTotalDur, uint64(dialEnd.Sub(dialStart)))
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}
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}
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}
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}
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