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Merge pull request #8 from systemli/metrics
Add support for basic metric exporting
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,64 @@ | ||
| package api | ||
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| import ( | ||
| "strconv" | ||
| "strings" | ||
| "time" | ||
|
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| "github.com/gin-gonic/gin" | ||
| "github.com/prometheus/client_golang/prometheus" | ||
| log "github.com/sirupsen/logrus" | ||
| ) | ||
|
|
||
| var ( | ||
| reqCnt = prometheus.NewCounterVec(prometheus.CounterOpts{ | ||
| Name: "http_requests_total", | ||
| Help: "The total number of requests", | ||
| }, []string{"handler", "origin", "code"}) | ||
|
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| reqDur = prometheus.NewSummaryVec(prometheus.SummaryOpts{ | ||
| Name: "http_request_duration_seconds", | ||
| Help: "The HTTP requests latency in seconds", | ||
| }, []string{"handler", "origin", "code"}) | ||
| ) | ||
|
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| // NewPrometheus returns the Gin Middleware for collecting basic http metrics. | ||
| func NewPrometheus() gin.HandlerFunc { | ||
| err := prometheus.Register(reqCnt) | ||
| if err != nil { | ||
| log.WithError(err).Error(`"reqCnt" could not be registered in Prometheus`) | ||
| } | ||
| err = prometheus.Register(reqDur) | ||
| if err != nil { | ||
| log.WithError(err).Error(`"reqDur" could not be registered in Prometheus`) | ||
| } | ||
|
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| return func(c *gin.Context) { | ||
| start := time.Now() | ||
|
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| c.Next() | ||
|
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| handler := prepareHandler(c.HandlerName()) | ||
| origin := prepareOrigin(c) | ||
| code := strconv.Itoa(c.Writer.Status()) | ||
|
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| elapsed := float64(time.Since(start)) / float64(time.Second) | ||
| reqDur.WithLabelValues(handler, origin, code).Observe(elapsed) | ||
| reqCnt.WithLabelValues(handler, origin, code).Inc() | ||
| } | ||
| } | ||
|
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| func prepareHandler(h string) string { | ||
| s := strings.Split(h, ".") | ||
|
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| return s[len(s)-1] | ||
| } | ||
|
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| func prepareOrigin(c *gin.Context) string { | ||
| domain, err := GetDomain(c) | ||
| if err != nil { | ||
| return "" | ||
| } | ||
|
|
||
| return domain | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
|
|
@@ -2,10 +2,11 @@ package model | |
|
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| import ( | ||
| "fmt" | ||
| "github.com/sethvargo/go-password/password" | ||
| "github.com/spf13/viper" | ||
| "path/filepath" | ||
| "strings" | ||
|
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| "github.com/sethvargo/go-password/password" | ||
| "github.com/spf13/viper" | ||
| ) | ||
|
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| var Config *config | ||
|
|
@@ -18,18 +19,20 @@ type config struct { | |
| Database string `mapstructure:"database"` | ||
| TwitterConsumerKey string `mapstructure:"twitter_consumer_key"` | ||
| TwitterConsumerSecret string `mapstructure:"twitter_consumer_secret"` | ||
| MetricsListen string `mapstructure:"metrics_listen"` | ||
| } | ||
|
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| //NewConfig returns config with default values. | ||
| func NewConfig() *config { | ||
| secret, _ := password.Generate(64, 12, 12, false, false) | ||
|
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| return &config{ | ||
| Listen: ":8080", | ||
| LogLevel: "debug", | ||
| Initiator: "[email protected]", | ||
| Secret: secret, | ||
| Database: "ticker.db", | ||
| Listen: ":8080", | ||
| LogLevel: "debug", | ||
| Initiator: "[email protected]", | ||
| Secret: secret, | ||
| Database: "ticker.db", | ||
| MetricsListen: ":8181", | ||
| } | ||
| } | ||
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@@ -49,6 +52,7 @@ func LoadConfig(path string) *config { | |
| viper.SetDefault("initiator", c.Initiator) | ||
| viper.SetDefault("secret", c.Secret) | ||
| viper.SetDefault("database", c.Database) | ||
| viper.SetDefault("metrics_listen", c.MetricsListen) | ||
| viper.SetDefault("twitter_consumer_key", "") | ||
| viper.SetDefault("twitter_consumer_secret", "") | ||
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