From 6f7b2fa5c489f6627e04b4bad952748185ad9abe Mon Sep 17 00:00:00 2001 From: Tiexin Guo Date: Mon, 11 Nov 2024 20:45:46 +0800 Subject: [PATCH 1/2] feat: add prometheus metrics endpoint --- go.mod | 14 ++++++++++++-- go.sum | 33 ++++++++++++++++++++++++++++++--- internals/daemon/daemon.go | 33 +++++++++++++++++++++++++++++++++ 3 files changed, 75 insertions(+), 5 deletions(-) diff --git a/go.mod b/go.mod index dde8646ac..60d558e64 100644 --- a/go.mod +++ b/go.mod @@ -8,7 +8,8 @@ require ( github.com/gorilla/mux v1.8.1 github.com/gorilla/websocket v1.5.1 github.com/pkg/term v1.1.0 - golang.org/x/sys v0.21.0 + github.com/prometheus/client_golang v1.20.5 + golang.org/x/sys v0.22.0 golang.org/x/term v0.21.0 gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c gopkg.in/tomb.v2 v2.0.0-20161208151619-d5d1b5820637 @@ -16,8 +17,17 @@ require ( ) require ( - github.com/kr/pretty v0.2.1 // indirect + github.com/beorn7/perks v1.0.1 // indirect + github.com/cespare/xxhash/v2 v2.3.0 // indirect + github.com/klauspost/compress v1.17.9 // indirect + github.com/kr/pretty v0.3.1 // indirect github.com/kr/text v0.2.0 // indirect + github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822 // indirect + github.com/prometheus/client_model v0.6.1 // indirect + github.com/prometheus/common v0.55.0 // indirect + github.com/prometheus/procfs v0.15.1 // indirect + github.com/rogpeppe/go-internal v1.10.0 // indirect golang.org/x/net v0.26.0 // indirect + google.golang.org/protobuf v1.34.2 // indirect gopkg.in/yaml.v2 v2.4.0 // indirect ) diff --git a/go.sum b/go.sum index 31493018c..8ab7fbf81 100644 --- a/go.sum +++ b/go.sum @@ -1,28 +1,55 @@ +github.com/beorn7/perks v1.0.1 h1:VlbKKnNfV8bJzeqoa4cOKqO6bYr3WgKZxO8Z16+hsOM= +github.com/beorn7/perks v1.0.1/go.mod h1:G2ZrVWU2WbWT9wwq4/hrbKbnv/1ERSJQ0ibhJ6rlkpw= github.com/canonical/go-flags v0.0.0-20230403090104-105d09a091b8 h1:zGaJEJI9qPVyM+QKFJagiyrM91Ke5S9htoL1D470g6E= github.com/canonical/go-flags v0.0.0-20230403090104-105d09a091b8/go.mod h1:ZZFeR9K9iGgpwOaLYF9PdT44/+lfSJ9sQz3B+SsGsYU= github.com/canonical/x-go v0.0.0-20230522092633-7947a7587f5b h1:Da2fardddn+JDlVEYtrzBLTtyzoyU3nIS0Cf0GvjmwU= github.com/canonical/x-go v0.0.0-20230522092633-7947a7587f5b/go.mod h1:upTK9n6rlqITN9rCN69hdreI37dRDFUk2thlGGD5Cg8= +github.com/cespare/xxhash/v2 v2.3.0 h1:UL815xU9SqsFlibzuggzjXhog7bL6oX9BbNZnL2UFvs= +github.com/cespare/xxhash/v2 v2.3.0/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs= github.com/creack/pty v1.1.9/go.mod h1:oKZEueFk5CKHvIhNR5MUki03XCEU+Q6VDXinZuGJ33E= +github.com/google/go-cmp v0.6.0 h1:ofyhxvXcZhMsU5ulbFiLKl/XBFqE1GSq7atu8tAmTRI= +github.com/google/go-cmp v0.6.0/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY= github.com/gorilla/mux v1.8.1 h1:TuBL49tXwgrFYWhqrNgrUNEY92u81SPhu7sTdzQEiWY= github.com/gorilla/mux v1.8.1/go.mod h1:AKf9I4AEqPTmMytcMc0KkNouC66V3BtZ4qD5fmWSiMQ= github.com/gorilla/websocket v1.5.1 h1:gmztn0JnHVt9JZquRuzLw3g4wouNVzKL15iLr/zn/QY= github.com/gorilla/websocket v1.5.1/go.mod h1:x3kM2JMyaluk02fnUJpQuwD2dCS5NDG2ZHL0uE0tcaY= -github.com/kr/pretty v0.2.1 h1:Fmg33tUaq4/8ym9TJN1x7sLJnHVwhP33CNkpYV/7rwI= +github.com/klauspost/compress v1.17.9 h1:6KIumPrER1LHsvBVuDa0r5xaG0Es51mhhB9BQB2qeMA= +github.com/klauspost/compress v1.17.9/go.mod h1:Di0epgTjJY877eYKx5yC51cX2A2Vl2ibi7bDH9ttBbw= github.com/kr/pretty v0.2.1/go.mod h1:ipq/a2n7PKx3OHsz4KJII5eveXtPO4qwEXGdVfWzfnI= +github.com/kr/pretty v0.3.1 h1:flRD4NNwYAUpkphVc1HcthR4KEIFJ65n8Mw5qdRn3LE= +github.com/kr/pretty v0.3.1/go.mod h1:hoEshYVHaxMs3cyo3Yncou5ZscifuDolrwPKZanG3xk= github.com/kr/pty v1.1.1/go.mod h1:pFQYn66WHrOpPYNljwOMqo10TkYh1fy3cYio2l3bCsQ= github.com/kr/text v0.1.0/go.mod h1:4Jbv+DJW3UT/LiOwJeYQe1efqtUx/iVham/4vfdArNI= github.com/kr/text v0.2.0 h1:5Nx0Ya0ZqY2ygV366QzturHI13Jq95ApcVaJBhpS+AY= github.com/kr/text v0.2.0/go.mod h1:eLer722TekiGuMkidMxC/pM04lWEeraHUUmBw8l2grE= +github.com/kylelemons/godebug v1.1.0 h1:RPNrshWIDI6G2gRW9EHilWtl7Z6Sb1BR0xunSBf0SNc= +github.com/kylelemons/godebug v1.1.0/go.mod h1:9/0rRGxNHcop5bhtWyNeEfOS8JIWk580+fNqagV/RAw= +github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822 h1:C3w9PqII01/Oq1c1nUAm88MOHcQC9l5mIlSMApZMrHA= +github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822/go.mod h1:+n7T8mK8HuQTcFwEeznm/DIxMOiR9yIdICNftLE1DvQ= +github.com/pkg/diff v0.0.0-20210226163009-20ebb0f2a09e/go.mod h1:pJLUxLENpZxwdsKMEsNbx1VGcRFpLqf3715MtcvvzbA= github.com/pkg/term v1.1.0 h1:xIAAdCMh3QIAy+5FrE8Ad8XoDhEU4ufwbaSozViP9kk= github.com/pkg/term v1.1.0/go.mod h1:E25nymQcrSllhX42Ok8MRm1+hyBdHY0dCeiKZ9jpNGw= +github.com/prometheus/client_golang v1.20.5 h1:cxppBPuYhUnsO6yo/aoRol4L7q7UFfdm+bR9r+8l63Y= +github.com/prometheus/client_golang v1.20.5/go.mod h1:PIEt8X02hGcP8JWbeHyeZ53Y/jReSnHgO035n//V5WE= +github.com/prometheus/client_model v0.6.1 h1:ZKSh/rekM+n3CeS952MLRAdFwIKqeY8b62p8ais2e9E= +github.com/prometheus/client_model v0.6.1/go.mod h1:OrxVMOVHjw3lKMa8+x6HeMGkHMQyHDk9E3jmP2AmGiY= +github.com/prometheus/common v0.55.0 h1:KEi6DK7lXW/m7Ig5i47x0vRzuBsHuvJdi5ee6Y3G1dc= +github.com/prometheus/common v0.55.0/go.mod h1:2SECS4xJG1kd8XF9IcM1gMX6510RAEL65zxzNImwdc8= +github.com/prometheus/procfs v0.15.1 h1:YagwOFzUgYfKKHX6Dr+sHT7km/hxC76UB0learggepc= +github.com/prometheus/procfs v0.15.1/go.mod h1:fB45yRUv8NstnjriLhBQLuOUt+WW4BsoGhij/e3PBqk= +github.com/rogpeppe/go-internal v1.9.0/go.mod h1:WtVeX8xhTBvf0smdhujwtBcq4Qrzq/fJaraNFVN+nFs= +github.com/rogpeppe/go-internal v1.10.0 h1:TMyTOH3F/DB16zRVcYyreMH6GnZZrwQVAoYjRBZyWFQ= +github.com/rogpeppe/go-internal v1.10.0/go.mod h1:UQnix2H7Ngw/k4C5ijL5+65zddjncjaFoBhdsK/akog= golang.org/x/net v0.26.0 h1:soB7SVo0PWrY4vPW/+ay0jKDNScG2X9wFeYlXIvJsOQ= golang.org/x/net v0.26.0/go.mod h1:5YKkiSynbBIh3p6iOc/vibscux0x38BZDkn8sCUPxHE= golang.org/x/sys v0.0.0-20200909081042-eff7692f9009/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= golang.org/x/sys v0.0.0-20210320140829-1e4c9ba3b0c4/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= -golang.org/x/sys v0.21.0 h1:rF+pYz3DAGSQAxAu1CbC7catZg4ebC4UIeIhKxBZvws= -golang.org/x/sys v0.21.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA= +golang.org/x/sys v0.22.0 h1:RI27ohtqKCnwULzJLqkv897zojh5/DwS/ENaMzUOaWI= +golang.org/x/sys v0.22.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA= golang.org/x/term v0.21.0 h1:WVXCp+/EBEHOj53Rvu+7KiT/iElMrO8ACK16SMZ3jaA= golang.org/x/term v0.21.0/go.mod h1:ooXLefLobQVslOqselCNF4SxFAaoS6KujMbsGzSDmX0= +google.golang.org/protobuf v1.34.2 h1:6xV6lTsCfpGD21XK49h7MhtcApnLqkfYgPcdHftf6hg= +google.golang.org/protobuf v1.34.2/go.mod h1:qYOHts0dSfpeUzUFpOMr/WGzszTmLH+DiWniOlNbLDw= gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0= gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c h1:Hei/4ADfdWqJk1ZMxUNpqntNwaWcugrBjAiHlqqRiVk= gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c/go.mod h1:JHkPIbrfpd72SG/EVd6muEfDQjcINNoR0C8j2r3qZ4Q= diff --git a/internals/daemon/daemon.go b/internals/daemon/daemon.go index b39c17975..dacd068bc 100644 --- a/internals/daemon/daemon.go +++ b/internals/daemon/daemon.go @@ -33,6 +33,7 @@ import ( "time" "github.com/gorilla/mux" + "github.com/prometheus/client_golang/prometheus/promhttp" "gopkg.in/tomb.v2" "github.com/canonical/pebble/internals/logger" @@ -343,6 +344,18 @@ func exitOnPanic(handler http.Handler, stderr io.Writer, exit func()) http.Handl }) } +func prometheusMetricsEndpointBasicAuth(h http.HandlerFunc, username, password string) http.HandlerFunc { + return func(w http.ResponseWriter, r *http.Request) { + user, pass, ok := r.BasicAuth() + if !ok || user != username || pass != password { + w.Header().Set("WWW-Authenticate", `Basic realm="Restricted"`) + http.Error(w, "Unauthorized", http.StatusUnauthorized) + return + } + h(w, r) + } +} + // Init sets up the Daemon's internal workings. // Don't call more than once. func (d *Daemon) Init() error { @@ -365,6 +378,26 @@ func (d *Daemon) Init() error { logger.Noticef("HTTP API server listening on %q.", d.httpAddress) } + // Channel to receive errors from goroutines + errChan := make(chan error) + + // Prometheus metrics server + go func() { + promRouter := mux.NewRouter() + promRouter.HandleFunc("/metrics", prometheusMetricsEndpointBasicAuth(promhttp.Handler().ServeHTTP, "username", "password")) + logger.Noticef("Prometheus metrics server listening on :2112") + errChan <- http.ListenAndServe(":2112", promRouter) + }() + select { + case err := <-errChan: + // Check if it's not a graceful shutdown + if err != nil && err != http.ErrServerClosed { + return fmt.Errorf("Error serving Prometheus metrics: %v", err) + } + case <-time.After(1 * time.Second): + // No errors received within the timeout. + } + logger.Noticef("Started daemon.") return nil } From f2ad4de54cb5887bf5a709716e3e3e88a9da236b Mon Sep 17 00:00:00 2001 From: Tiexin Guo Date: Mon, 11 Nov 2024 20:51:51 +0800 Subject: [PATCH 2/2] chore: add a counter to include libs --- internals/daemon/daemon.go | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/internals/daemon/daemon.go b/internals/daemon/daemon.go index dacd068bc..82ad813d1 100644 --- a/internals/daemon/daemon.go +++ b/internals/daemon/daemon.go @@ -33,6 +33,8 @@ import ( "time" "github.com/gorilla/mux" + "github.com/prometheus/client_golang/prometheus" + "github.com/prometheus/client_golang/prometheus/promauto" "github.com/prometheus/client_golang/prometheus/promhttp" "gopkg.in/tomb.v2" @@ -398,6 +400,13 @@ func (d *Daemon) Init() error { // No errors received within the timeout. } + // Use counter metrics to include necessary libs. + opsProcessed := promauto.NewCounter(prometheus.CounterOpts{ + Name: "myapp_processed_ops_total", + Help: "The total number of processed events", + }) + opsProcessed.Inc() + logger.Noticef("Started daemon.") return nil }