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Merge pull request #3 from snapp-incubator/initial-metric
Use JetStream Instead of Regular NATS and Add Metrics
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| Original file line number | Diff line number | Diff line change |
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@@ -5,4 +5,4 @@ linters: | |
| - govet | ||
| - revive | ||
| - staticcheck | ||
| - errcheck | ||
| - errcheck | ||
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,10 @@ | ||
| package metric | ||
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| type Config struct { | ||
| Server Server `json:"server,omitempty" koanf:"server"` | ||
| Enabled bool `json:"enabled,omitempty" koanf:"enabled"` | ||
| } | ||
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| type Server struct { | ||
| Address string `json:"address,omitempty" koanf:"address"` | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,51 @@ | ||
| package metric | ||
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| import ( | ||
| "errors" | ||
| "net/http" | ||
| "time" | ||
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| "github.com/prometheus/client_golang/prometheus/promhttp" | ||
| "go.uber.org/zap" | ||
| ) | ||
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| // MetricServer contains information about metrics server. | ||
| type ServerInfo struct { | ||
| srv *http.ServeMux | ||
| address string | ||
| } | ||
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| // NewServer creates a new monitoring server. | ||
| func NewServer(cfg Config) ServerInfo { | ||
| var srv *http.ServeMux | ||
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| if cfg.Enabled { | ||
| srv = http.NewServeMux() | ||
| srv.Handle("/metrics", promhttp.Handler()) | ||
| } | ||
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| return ServerInfo{ | ||
| address: cfg.Server.Address, | ||
| srv: srv, | ||
| } | ||
| } | ||
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| // Start creates and run a metric server for prometheus in new go routine. | ||
| // nolint: mnd | ||
| func (s ServerInfo) Start(logger *zap.Logger) { | ||
| go func() { | ||
| // nolint: exhaustruct | ||
| srv := http.Server{ | ||
| Addr: s.address, | ||
| Handler: s.srv, | ||
| ReadTimeout: 10 * time.Second, | ||
| WriteTimeout: 10 * time.Second, | ||
| IdleTimeout: 30 * time.Second, | ||
| TLSConfig: nil, | ||
| } | ||
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| if err := srv.ListenAndServe(); !errors.Is(err, http.ErrServerClosed) { | ||
| logger.Error("metric server initiation failed", zap.Error(err)) | ||
| } | ||
| }() | ||
| } |
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