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added timeouts to avoid memory leaking #328

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added timeouts to avoid memory leaking #328

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8303654
limit fcgi client maximum request execution time
damoon Sep 7, 2023
57e431b
configure prometheus handler to limit maximum requests in flight and …
damoon Sep 7, 2023
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10 changes: 9 additions & 1 deletion cmd/server.go
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Original file line number Diff line number Diff line change
Expand Up @@ -71,7 +71,15 @@ to quickly create a Cobra application.`,
IdleTimeout: time.Second * 60,
}

http.Handle(metricsEndpoint, promhttp.Handler())
opts := promhttp.HandlerOpts{
Timeout: 5 * time.Second,
MaxRequestsInFlight: 2,
}
handler := promhttp.InstrumentMetricHandler(
prometheus.DefaultRegisterer,
promhttp.HandlerFor(prometheus.DefaultGatherer, opts),
)
http.Handle(metricsEndpoint, handler)
http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
_, err := w.Write([]byte(`<html>
<head><title>php-fpm_exporter</title></head>
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2 changes: 2 additions & 0 deletions go.mod
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Original file line number Diff line number Diff line change
Expand Up @@ -14,3 +14,5 @@ require (
)

go 1.13

replace github.com/tomasen/fcgi_client => github.com/kanocz/fcgi_client v0.0.0-20210113082628-fff85c8adfb7
4 changes: 2 additions & 2 deletions go.sum
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Original file line number Diff line number Diff line change
Expand Up @@ -1443,6 +1443,8 @@ github.com/julienschmidt/httprouter v1.2.0/go.mod h1:SYymIcj16QtmaHHD7aYtjjsJG7V
github.com/julienschmidt/httprouter v1.3.0/go.mod h1:JR6WtHb+2LUe8TCKY3cZOxFyyO8IZAc4RVcycCCAKdM=
github.com/jung-kurt/gofpdf v1.0.0/go.mod h1:7Id9E/uU8ce6rXgefFLlgrJj/GYY22cpxn+r32jIOes=
github.com/jung-kurt/gofpdf v1.0.3-0.20190309125859-24315acbbda5/go.mod h1:7Id9E/uU8ce6rXgefFLlgrJj/GYY22cpxn+r32jIOes=
github.com/kanocz/fcgi_client v0.0.0-20210113082628-fff85c8adfb7 h1:W0fAsQ7bC1db4k9O2X6yZvatz/0c/ISyxhmNnc6arZA=
github.com/kanocz/fcgi_client v0.0.0-20210113082628-fff85c8adfb7/go.mod h1:dHpIS7C6YjFguh5vo9QBVEojDoL3vh3v6oEho2HtNyA=
github.com/kballard/go-shellquote v0.0.0-20180428030007-95032a82bc51/go.mod h1:CzGEWj7cYgsdH8dAjBGEr58BoE7ScuLd+fwFZ44+/x8=
github.com/kisielk/errcheck v1.5.0/go.mod h1:pFxgyoBC7bSaBwPgfKdkLd5X25qrDl4LWUI2bnpBCr8=
github.com/kisielk/gotool v1.0.0/go.mod h1:XhKaO+MFFWcvkIS/tQcRk01m1F5IRFswLeQ+oQHNcck=
Expand Down Expand Up @@ -1639,8 +1641,6 @@ github.com/stretchr/testify v1.8.4 h1:CcVxjf3Q8PM0mHUKJCdn+eZZtm5yQwehR5yeSVQQcU
github.com/stretchr/testify v1.8.4/go.mod h1:sz/lmYIOXD/1dqDmKjjqLyZ2RngseejIcXlSw2iwfAo=
github.com/subosito/gotenv v1.6.0 h1:9NlTDc1FTs4qu0DDq7AEtTPNw6SVm7uBMsUCUjABIf8=
github.com/subosito/gotenv v1.6.0/go.mod h1:Dk4QP5c2W3ibzajGcXpNraDfq2IrhjMIvMSWPKKo0FU=
github.com/tomasen/fcgi_client v0.0.0-20180423082037-2bb3d819fd19 h1:ZCmSnT6CLGhfoQ2lPEhL4nsJstKDCw1F1RfN8/smTCU=
github.com/tomasen/fcgi_client v0.0.0-20180423082037-2bb3d819fd19/go.mod h1:SXTY+QvI+KTTKXQdg0zZ7nx0u94QWh8ZAwBQYsW9cqk=
github.com/tv42/httpunix v0.0.0-20150427012821-b75d8614f926/go.mod h1:9ESjWnEqriFuLhtthL60Sar/7RFoluCcXsuvEwTV5KM=
github.com/xhit/go-str2duration v1.2.0/go.mod h1:3cPSlfZlUHVlneIVfePFWcJZsuwf+P1v2SRTV4cUmp4=
github.com/xhit/go-str2duration/v2 v2.1.0/go.mod h1:ohY8p+0f07DiV6Em5LKB0s2YpLtXVyJfNt1+BlmyAsU=
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2 changes: 2 additions & 0 deletions phpfpm/phpfpm.go
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Original file line number Diff line number Diff line change
Expand Up @@ -163,6 +163,8 @@ func (p *Pool) Update() (err error) {

defer fcgi.Close()

fcgi.SetTimeout(time.Duration(3) * time.Second)

env := map[string]string{
"SCRIPT_FILENAME": path,
"SCRIPT_NAME": path,
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