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Client configured with TLS using HCP config and retry/throttle
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,139 @@ | ||
| package client | ||
|
|
||
| import ( | ||
| "bytes" | ||
| "context" | ||
| "fmt" | ||
| "io" | ||
| "net/http" | ||
| "time" | ||
|
|
||
| "golang.org/x/oauth2" | ||
| "google.golang.org/protobuf/proto" | ||
|
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| colmetricpb "go.opentelemetry.io/proto/otlp/collector/metrics/v1" | ||
| metricpb "go.opentelemetry.io/proto/otlp/metrics/v1" | ||
|
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| "github.com/hashicorp/consul/agent/hcp/config" | ||
| "github.com/hashicorp/consul/version" | ||
| "github.com/hashicorp/go-cleanhttp" | ||
| "github.com/hashicorp/go-hclog" | ||
| "github.com/hashicorp/go-retryablehttp" | ||
| ) | ||
|
|
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| const ( | ||
| // HTTP Client config | ||
| defaultStreamTimeout = 15 * time.Second | ||
|
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| // Retry config | ||
| defaultRetryWaitMin = 15 * time.Second | ||
| defaultRetryWaitMax = 15 * time.Second | ||
| defaultRetryMax = 4 | ||
| ) | ||
|
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| type MetricsClient interface { | ||
| ExportMetrics(ctx context.Context, protoMetrics *metricpb.ResourceMetrics, endpoint string) error | ||
| } | ||
|
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| type otlpClient struct { | ||
| client *retryablehttp.Client | ||
| headers map[string]string | ||
| } | ||
|
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| type TelemetryClientCfg struct { | ||
| cloudCfg config.CloudConfig | ||
| logger hclog.Logger | ||
| } | ||
|
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| func NewMetricsClient(cfg TelemetryClientCfg) (MetricsClient, error) { | ||
| c, err := newHTTPClient(cfg.cloudCfg, cfg.logger) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
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| headers := map[string]string{ | ||
| "X-HCP-Source-Channel": fmt.Sprintf("consul %s hcp-go-sdk/%s", version.GetHumanVersion(), version.Version), | ||
| "Content-Type": "application/x-protobuf", | ||
| } | ||
|
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| return &otlpClient{ | ||
| client: c, | ||
| headers: headers, | ||
| }, nil | ||
| } | ||
|
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| func newHTTPClient(cloudCfg config.CloudConfig, logger hclog.Logger) (*retryablehttp.Client, error) { | ||
| hcpCfg, err := cloudCfg.HCPConfig() | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
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| tlsTransport := cleanhttp.DefaultPooledTransport() | ||
| tlsTransport.TLSClientConfig = hcpCfg.APITLSConfig() | ||
|
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| var transport http.RoundTripper = &oauth2.Transport{ | ||
| Base: tlsTransport, | ||
| Source: hcpCfg, | ||
| } | ||
|
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| client := &http.Client{ | ||
| Transport: transport, | ||
| Timeout: defaultStreamTimeout, | ||
| } | ||
|
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| retryClient := &retryablehttp.Client{ | ||
| HTTPClient: client, | ||
| Logger: logger, | ||
| RetryWaitMin: defaultRetryWaitMin, | ||
| RetryWaitMax: defaultRetryWaitMax, | ||
| RetryMax: defaultRetryMax, | ||
| CheckRetry: retryablehttp.DefaultRetryPolicy, | ||
| Backoff: retryablehttp.DefaultBackoff, | ||
| } | ||
|
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| return retryClient, nil | ||
| } | ||
|
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| func (o *otlpClient) ExportMetrics(ctx context.Context, protoMetrics *metricpb.ResourceMetrics, endpoint string) error { | ||
| pbRequest := &colmetricpb.ExportMetricsServiceRequest{ | ||
| ResourceMetrics: []*metricpb.ResourceMetrics{protoMetrics}, | ||
| } | ||
|
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| body, err := proto.Marshal(pbRequest) | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
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| req, err := retryablehttp.NewRequest(http.MethodPost, endpoint, bytes.NewBuffer(body)) | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
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| for k, v := range o.headers { | ||
| req.Header.Set(k, v) | ||
| } | ||
|
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| resp, err := o.client.Do(req) | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
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| var respData bytes.Buffer | ||
| if _, err := io.Copy(&respData, resp.Body); err != nil { | ||
| return err | ||
| } | ||
|
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| if respData.Len() != 0 { | ||
| var respProto colmetricpb.ExportMetricsServiceResponse | ||
| if err := proto.Unmarshal(respData.Bytes(), &respProto); err != nil { | ||
| return err | ||
| } | ||
|
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| if respProto.PartialSuccess != nil { | ||
| msg := respProto.PartialSuccess.GetErrorMessage() | ||
| return fmt.Errorf("failed to upload metrics: partial success: %s", msg) | ||
| } | ||
| } | ||
|
|
||
| return nil | ||
| } |
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