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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,104 @@ | ||
| // Package gcputil provides functions | ||
| // that interact with various GCP platforms | ||
| // such as getting GAE metadata and registering | ||
| // stack driver monitoring | ||
| package gcputil | ||
|
|
||
| import ( | ||
| "os" | ||
|
|
||
| "contrib.go.opencensus.io/exporter/stackdriver" | ||
| "contrib.go.opencensus.io/exporter/stackdriver/monitoredresource" | ||
| "go.opencensus.io/stats/view" | ||
| "go.opencensus.io/trace" | ||
| ) | ||
|
|
||
| // NewOpenCensusExporter will return the tracing and metrics through | ||
| // the stack driver exporter, if exists in the underlying platform. | ||
| // If exporter is registered, it returns the exporter so you can register | ||
| // it and ensure to call Flush on termination. | ||
| func NewOpenCensusExporter(projectID string, onErr func(error)) (*stackdriver.Exporter, error) { | ||
| svcName, svcVersion := "", "" | ||
| if IsGAE() { | ||
| _, svcName, svcVersion = GetGAEInfo() | ||
| } else if n, v := os.Getenv("SERVICE_NAME"), os.Getenv("SERVICE_VERSION"); n != "" { | ||
| svcName, svcVersion = n, v | ||
| } | ||
| opts := SDExporterOptions(projectID, svcName, svcVersion, onErr) | ||
| if opts == nil { | ||
| return nil, nil | ||
| } | ||
| return stackdriver.NewExporter(*opts) | ||
| } | ||
|
|
||
| // GoogleProjectID returns the GCP Project ID | ||
| // that can be used to instantiate various | ||
| // GCP clients such as Stack Driver. | ||
| func GoogleProjectID() string { | ||
| return os.Getenv("GOOGLE_CLOUD_PROJECT") | ||
| } | ||
|
|
||
| // IsGAE tells you whether your program is running | ||
| // within the App Engine platform. | ||
| func IsGAE() bool { | ||
| return os.Getenv("GAE_DEPLOYMENT_ID") != "" | ||
| } | ||
|
|
||
| // GetGAEInfo returns the GCP Project ID, | ||
| // the service, and the version of the application. | ||
| func GetGAEInfo() (projectID, service, version string) { | ||
| return GoogleProjectID(), | ||
| os.Getenv("GAE_SERVICE"), | ||
| os.Getenv("GAE_VERSION") | ||
| } | ||
|
|
||
| // SDExporterOptions returns Stack Driver Options that you can pass directly | ||
| // to the OpenCensus exporter or other libraries. | ||
| func SDExporterOptions(projectID, service, version string, onErr func(err error)) *stackdriver.Options { | ||
| var mr monitoredresource.Interface | ||
| if m := monitoredresource.Autodetect(); m != nil { | ||
| mr = m | ||
| } else if IsGAE() { | ||
| mr = gaeInterface{ | ||
| typ: "gae_app", | ||
| labels: map[string]string{ | ||
| "project_id": projectID, | ||
| }, | ||
| } | ||
| } | ||
| if mr == nil { | ||
| return nil | ||
| } | ||
|
|
||
| return &stackdriver.Options{ | ||
| ProjectID: projectID, | ||
| MonitoredResource: mr, | ||
| OnError: onErr, | ||
| DefaultMonitoringLabels: &stackdriver.Labels{}, | ||
| DefaultTraceAttributes: map[string]interface{}{ | ||
| "service": service, | ||
| "version": version, | ||
| }, | ||
| } | ||
| } | ||
|
|
||
| // InitSDExporter will initialize the OpenCensus tracing/metrics exporter | ||
| func InitSDExporter(opts stackdriver.Options) error { | ||
| exporter, err := stackdriver.NewExporter(opts) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| trace.RegisterExporter(exporter) | ||
| view.RegisterExporter(exporter) | ||
| return nil | ||
| } | ||
|
|
||
| // implements contrib.go.opencensus.io/exporter/stackdriver/monitoredresource.Interface | ||
| type gaeInterface struct { | ||
| typ string | ||
| labels map[string]string | ||
| } | ||
|
|
||
| func (g gaeInterface) MonitoredResource() (string, map[string]string) { | ||
| return g.typ, g.labels | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,111 @@ | ||
| package ocexporters | ||
|
|
||
| import ( | ||
| "fmt" | ||
| "os" | ||
|
|
||
| "contrib.go.opencensus.io/exporter/stackdriver" | ||
| "contrib.go.opencensus.io/exporter/stackdriver/monitoredresource" | ||
| "go.opencensus.io/exporter/prometheus" | ||
| "go.opencensus.io/stats/view" | ||
| "go.opencensus.io/trace" | ||
| ) | ||
|
|
||
| // NewOCExporters returns trace/client exporters | ||
| // based on the given environment. ProjectID | ||
| // is the GCP projectID for stackdriver (or the prometheus namespace) and backend | ||
| // specifies whether the backend is StackDriver or Prometheus | ||
| func NewOCExporters(projectID, backend string, onErr func(err error)) (trace.Exporter, view.Exporter, error) { | ||
| switch backend { | ||
| case "stackdriver": | ||
| return getSDExporter(projectID, onErr) | ||
| case "prometheus": | ||
| return getPrometheusExporter(projectID, onErr) | ||
| } | ||
|
|
||
| return nil, nil, fmt.Errorf("unrecognized backend: %v", backend) | ||
| } | ||
|
|
||
| func getPrometheusExporter(namespace string, onErr func(error)) (trace.Exporter, view.Exporter, error) { | ||
| pe, err := prometheus.NewExporter(prometheus.Options{ | ||
| Namespace: namespace, | ||
| OnError: onErr, | ||
| }) | ||
| return nil, pe, err | ||
| } | ||
|
|
||
| func getSDExporter(projectID string, onErr func(error)) (trace.Exporter, view.Exporter, error) { | ||
| svcName, svcVersion := "", "" | ||
| if IsGAE() { | ||
| _, svcName, svcVersion = GetGAEInfo() | ||
| } else if n, v := os.Getenv("SERVICE_NAME"), os.Getenv("SERVICE_VERSION"); n != "" { | ||
| svcName, svcVersion = n, v | ||
| } | ||
| opts := getSDExporterOptions(projectID, svcName, svcVersion, onErr) | ||
| if opts == nil { | ||
| return nil, nil, nil | ||
| } | ||
| exp, err := stackdriver.NewExporter(*opts) | ||
| return exp, exp, err | ||
| } | ||
|
|
||
| // getSDExporterOptions returns Stack Driver Options that you can pass directly | ||
| // to the OpenCensus exporter or other libraries. | ||
| func getSDExporterOptions(projectID, service, version string, onErr func(err error)) *stackdriver.Options { | ||
| var mr monitoredresource.Interface | ||
| if m := monitoredresource.Autodetect(); m != nil { | ||
| mr = m | ||
| } else if IsGAE() { | ||
| mr = gaeInterface{ | ||
| typ: "gae_app", | ||
| labels: map[string]string{ | ||
| "project_id": projectID, | ||
| }, | ||
| } | ||
| } | ||
| if mr == nil { | ||
| return nil | ||
| } | ||
|
|
||
| return &stackdriver.Options{ | ||
| ProjectID: projectID, | ||
| MonitoredResource: mr, | ||
| OnError: onErr, | ||
| DefaultMonitoringLabels: &stackdriver.Labels{}, | ||
| DefaultTraceAttributes: map[string]interface{}{ | ||
| "service": service, | ||
| "version": version, | ||
| }, | ||
| } | ||
| } | ||
|
|
||
| // implements contrib.go.opencensus.io/exporter/stackdriver/monitoredresource.Interface | ||
| type gaeInterface struct { | ||
| typ string | ||
| labels map[string]string | ||
| } | ||
|
|
||
| func (g gaeInterface) MonitoredResource() (string, map[string]string) { | ||
| return g.typ, g.labels | ||
| } | ||
|
|
||
| // GoogleProjectID returns the GCP Project ID | ||
| // that can be used to instantiate various | ||
| // GCP clients such as Stack Driver. | ||
| func GoogleProjectID() string { | ||
| return os.Getenv("GOOGLE_CLOUD_PROJECT") | ||
| } | ||
|
|
||
| // IsGAE tells you whether your program is running | ||
| // within the App Engine platform. | ||
| func IsGAE() bool { | ||
| return os.Getenv("GAE_DEPLOYMENT_ID") != "" | ||
| } | ||
|
|
||
| // GetGAEInfo returns the GCP Project ID, | ||
| // the service, and the version of the application. | ||
| func GetGAEInfo() (projectID, service, version string) { | ||
| return GoogleProjectID(), | ||
| os.Getenv("GAE_SERVICE"), | ||
| os.Getenv("GAE_VERSION") | ||
| } |
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