jialei
1 year ago
parent
523d75fa30
commit
9bd388fd71
@ -0,0 +1,408 @@ |
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package provider |
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|
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import ( |
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"context" |
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"encoding/json" |
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"errors" |
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"fmt" |
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"go.opentelemetry.io/otel/attribute" |
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"go.opentelemetry.io/otel/exporters/otlp/otlptrace" |
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"go.opentelemetry.io/otel/exporters/stdout/stdoutmetric" |
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semconv "go.opentelemetry.io/otel/semconv/v1.7.0" |
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"os" |
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"strings" |
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"time" |
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|
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"github.com/sethvargo/go-envconfig" |
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"go.opentelemetry.io/contrib/instrumentation/host" |
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"go.opentelemetry.io/contrib/instrumentation/runtime" |
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"go.opentelemetry.io/otel" |
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"go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetricgrpc" |
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otlpTraceGrpc "go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc" |
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"go.opentelemetry.io/otel/exporters/stdout/stdouttrace" |
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"go.opentelemetry.io/otel/propagation" |
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"go.opentelemetry.io/otel/sdk/metric" |
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"go.opentelemetry.io/otel/sdk/resource" |
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"go.opentelemetry.io/otel/sdk/trace" |
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sdktrace "go.opentelemetry.io/otel/sdk/trace" |
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"google.golang.org/grpc/credentials" |
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"google.golang.org/grpc/encoding/gzip" |
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) |
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|
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const ( |
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slsProjectHeader = "x-sls-otel-project" |
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slsInstanceIDHeader = "x-sls-otel-instance-id" |
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slsAccessKeyIDHeader = "x-sls-otel-ak-id" |
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slsAccessKeySecretHeader = "x-sls-otel-ak-secret" |
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slsSecurityTokenHeader = "x-sls-otel-token" |
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) |
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|
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// Option configures the sls otel provider
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type Option func(*Config) |
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|
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// WithMetricExporterEndpoint configures the endpoint for sending metrics via OTLP
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// 配置Metric的输出地址，如果配置为空则禁用Metric功能，配置为stdout则打印到标准输出用于测试
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func WithMetricExporterEndpoint(url string) Option { |
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return func(c *Config) { |
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c.MetricExporterEndpoint = url |
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} |
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} |
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|
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// WithTraceExporterEndpoint configures the endpoint for sending traces via OTLP
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// 配置Trace的输出地址，如果配置为空则禁用Trace功能，配置为stdout则打印到标准输出用于测试
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func WithTraceExporterEndpoint(url string) Option { |
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return func(c *Config) { |
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c.TraceExporterEndpoint = url |
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} |
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} |
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|
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// WithServiceName configures a "service.name" resource label
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// 配置服务名称
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func WithServiceName(name string) Option { |
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return func(c *Config) { |
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c.ServiceName = name |
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} |
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} |
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|
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func WithServiceNamespace(namespace string) Option { |
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return func(c *Config) { |
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c.ServiceNamespace = namespace |
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} |
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} |
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|
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// WithServiceVersion configures a "service.version" resource label
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// 配置版本号
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func WithServiceVersion(version string) Option { |
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return func(c *Config) { |
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c.ServiceVersion = version |
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} |
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} |
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|
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// WithTraceExporterInsecure permits connecting to the trace endpoint without a certificate
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// 配置是否禁用SSL，如果输出到SLS，则必须打开SLS
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func WithTraceExporterInsecure(insecure bool) Option { |
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return func(c *Config) { |
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c.TraceExporterEndpointInsecure = insecure |
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} |
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} |
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|
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// WithMetricExporterInsecure permits connecting to the metric endpoint without a certificate
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// 配置是否禁用SSL，如果输出到SLS，则必须打开SLS
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func WithMetricExporterInsecure(insecure bool) Option { |
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return func(c *Config) { |
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c.MetricExporterEndpointInsecure = insecure |
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} |
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} |
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|
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// WithResourceAttributes configures attributes on the resource
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// 配置上传附加的一些tag信息，例如环境、可用区等
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func WithResourceAttributes(attributes map[string]string) Option { |
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return func(c *Config) { |
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c.resourceAttributes = attributes |
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} |
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} |
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|
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// WithResource configures attributes on the resource
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// 配置上传附加的一些tag信息，例如环境、可用区等
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func WithResource(resource *resource.Resource) Option { |
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return func(c *Config) { |
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c.Resource = resource |
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} |
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} |
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|
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// WithErrorHandler Configures a global error handler to be used throughout an OpenTelemetry instrumented project.
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// See "go.opentelemetry.io/otel"
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// 配置OpenTelemetry错误处理函数
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func WithErrorHandler(handler otel.ErrorHandler) Option { |
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return func(c *Config) { |
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c.errorHandler = handler |
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} |
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} |
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|
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// WithMetricReportingPeriod configures the metric reporting period,
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// how often the controller collects and exports metric data.
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// 配置Metric导出间隔，默认为30s
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func WithMetricReportingPeriod(p time.Duration) Option { |
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return func(c *Config) { |
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c.MetricReportingPeriod = fmt.Sprint(p) |
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} |
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} |
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|
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// WithSLSConfig configures sls project, instanceID, accessKeyID, accessKeySecret to send data to sls directly
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// 配置输出到SLS的信息，包括 project, instanceID, accessKeyID, accessKeySecret
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func WithSLSConfig(project, instanceID, accessKeyID, accessKeySecret string) Option { |
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return func(c *Config) { |
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c.Project, c.InstanceID, c.AccessKeyID, c.AccessKeySecret = project, instanceID, accessKeyID, accessKeySecret |
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} |
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} |
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|
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func WithIDGenerator(generator sdktrace.IDGenerator) Option { |
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return func(config *Config) { |
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if generator != nil { |
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config.IDGenerator = generator |
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} |
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} |
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} |
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|
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// Config configure for sls otel
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type Config struct { |
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TraceExporterEndpoint string `env:"SLS_OTEL_TRACE_ENDPOINT,default=stdout"` |
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TraceExporterEndpointInsecure bool `env:"SLS_OTEL_TRACE_INSECURE,default=false"` |
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MetricExporterEndpoint string `env:"SLS_OTEL_METRIC_ENDPOINT,default=stdout"` |
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MetricExporterEndpointInsecure bool `env:"SLS_OTEL_METRIC_INSECURE,default=false"` |
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MetricReportingPeriod string `env:"SLS_OTEL_METRIC_EXPORT_PERIOD,default=30s"` |
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ServiceName string `env:"SLS_OTEL_SERVICE_NAME"` |
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ServiceNamespace string `env:"SLS_OTEL_SERVICE_NAMESPACE"` |
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ServiceVersion string `env:"SLS_OTEL_SERVICE_VERSION,default=v0.1.0"` |
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Project string `env:"SLS_OTEL_PROJECT"` |
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InstanceID string `env:"SLS_OTEL_INSTANCE_ID"` |
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AccessKeyID string `env:"SLS_OTEL_ACCESS_KEY_ID"` |
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AccessKeySecret string `env:"SLS_OTEL_ACCESS_KEY_SECRET"` |
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AttributesEnvKeys string `env:"SLS_OTEL_ATTRIBUTES_ENV_KEYS"` |
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IDGenerator sdktrace.IDGenerator |
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Resource *resource.Resource |
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resourceAttributes map[string]string |
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errorHandler otel.ErrorHandler |
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stop []func() |
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} |
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func parseEnvKeys(c *Config) { |
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if c.AttributesEnvKeys == "" { |
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return |
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} |
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envKeys := strings.Split(c.AttributesEnvKeys, "|") |
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for _, key := range envKeys { |
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key = strings.TrimSpace(key) |
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value := os.Getenv(key) |
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if value != "" { |
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c.resourceAttributes[key] = value |
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} |
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} |
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} |
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|
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// 默认使用本机hostname作为hostname
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func getDefaultResource(c *Config) *resource.Resource { |
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hostname, _ := os.Hostname() |
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return resource.NewWithAttributes( |
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semconv.SchemaURL, |
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semconv.ServiceNameKey.String(c.ServiceName), |
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semconv.HostNameKey.String(hostname), |
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semconv.ServiceNamespaceKey.String(c.ServiceNamespace), |
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semconv.ServiceVersionKey.String(c.ServiceVersion), |
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semconv.ProcessPIDKey.Int(os.Getpid()), |
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semconv.ProcessCommandKey.String(os.Args[0]), |
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) |
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} |
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|
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func mergeResource(c *Config) error { |
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var e error |
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if c.Resource, e = resource.Merge(getDefaultResource(c), c.Resource); e != nil { |
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return e |
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} |
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r := resource.Environment() |
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if c.Resource, e = resource.Merge(c.Resource, r); e != nil { |
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return e |
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} |
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var keyValues []attribute.KeyValue |
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for key, value := range c.resourceAttributes { |
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keyValues = append(keyValues, attribute.KeyValue{ |
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Key: attribute.Key(key), |
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Value: attribute.StringValue(value), |
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}) |
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} |
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newResource := resource.NewWithAttributes(semconv.SchemaURL, keyValues...) |
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if c.Resource, e = resource.Merge(c.Resource, newResource); e != nil { |
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return e |
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} |
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return nil |
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} |
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|
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// 初始化Exporter，如果otlpEndpoint传入的值为 stdout，则默认把信息打印到标准输出用于调试
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func (c *Config) initOtelExporter(otlpEndpoint string, insecure bool) (trace.SpanExporter, metric.Exporter, func(), error) { |
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var traceExporter trace.SpanExporter |
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var metricsExporter metric.Exporter |
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var err error |
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var exporterStop = func() { |
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if traceExporter != nil { |
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traceExporter.Shutdown(context.Background()) |
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} |
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} |
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if otlpEndpoint == "stdout" { |
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// 使用Pretty的打印方式
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traceExporter, err = stdouttrace.New(stdouttrace.WithPrettyPrint()) |
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if err != nil { |
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return nil, nil, nil, err |
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} |
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enc := json.NewEncoder(os.Stdout) |
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metricsExporter, err = stdoutmetric.New(stdoutmetric.WithEncoder(enc)) |
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} else if otlpEndpoint != "" { |
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headers := map[string]string{} |
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if c.Project != "" && c.InstanceID != "" { |
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headers = map[string]string{ |
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slsProjectHeader: c.Project, |
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slsInstanceIDHeader: c.InstanceID, |
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slsAccessKeyIDHeader: c.AccessKeyID, |
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slsAccessKeySecretHeader: c.AccessKeySecret, |
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} |
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} |
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// 使用GRPC方式导出数据
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traceSecureOption := otlpTraceGrpc.WithTLSCredentials(credentials.NewClientTLSFromCert(nil, "")) |
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if insecure { |
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traceSecureOption = otlpTraceGrpc.WithInsecure() |
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} |
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traceExporter, err = otlptrace.New(context.Background(), |
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otlpTraceGrpc.NewClient(otlpTraceGrpc.WithEndpoint(otlpEndpoint), |
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traceSecureOption, |
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otlpTraceGrpc.WithHeaders(headers), |
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otlpTraceGrpc.WithCompressor(gzip.Name))) |
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if err != nil { |
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return nil, nil, nil, err |
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} |
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metricSecureOption := otlpmetricgrpc.WithTLSCredentials(credentials.NewClientTLSFromCert(nil, "")) |
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if insecure { |
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metricSecureOption = otlpmetricgrpc.WithInsecure() |
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} |
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metricsExporter, err = otlpmetricgrpc.New(context.Background(), otlpmetricgrpc.WithEndpoint(otlpEndpoint), |
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metricSecureOption, otlpmetricgrpc.WithHeaders(headers), otlpmetricgrpc.WithCompressor(gzip.Name)) |
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} |
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return traceExporter, metricsExporter, exporterStop, nil |
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} |
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// 初始化Metrics，默认30秒导出一次Metrics
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// 默认该函数导出主机和Golang runtime基础指标
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func (c *Config) initMetric(metricsExporter metric.Exporter, stop func()) error { |
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if metricsExporter == nil { |
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return nil |
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} |
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period, err := time.ParseDuration(c.MetricReportingPeriod) |
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if err != nil { |
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period = time.Second * 30 |
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} |
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reader := metric.NewPeriodicReader(metricsExporter, metric.WithInterval(period)) |
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meterProvider := metric.NewMeterProvider( |
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metric.WithReader(reader), |
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metric.WithResource(c.Resource)) |
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otel.SetMeterProvider(meterProvider) |
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// 默认集成主机基础指标
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if err := host.Start(host.WithMeterProvider(meterProvider)); err != nil { |
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return err |
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} |
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// 默认集成Golang runtime指标
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err = runtime.Start(runtime.WithMeterProvider(meterProvider), runtime.WithMinimumReadMemStatsInterval(time.Second)) |
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c.stop = append(c.stop, func() { |
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meterProvider.Shutdown(context.Background()) |
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stop() |
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}) |
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return err |
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} |
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// 初始化Traces，默认全量上传
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func (c *Config) initTracer(traceExporter trace.SpanExporter, stop func(), config *Config) error { |
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if traceExporter == nil { |
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return nil |
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} |
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// 建议使用AlwaysSample全量上传Trace数据，若您的数据太多，可以使用sdktrace.ProbabilitySampler进行采样上传
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tp := sdktrace.NewTracerProvider( |
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sdktrace.WithBatcher( |
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traceExporter, |
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), |
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sdktrace.WithIDGenerator(config.IDGenerator), |
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sdktrace.WithResource(c.Resource), |
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) |
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otel.SetTracerProvider(tp) |
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otel.SetTextMapPropagator(propagation.NewCompositeTextMapPropagator(propagation.TraceContext{}, propagation.Baggage{})) |
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c.stop = append(c.stop, func() { |
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tp.Shutdown(context.Background()) |
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stop() |
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}) |
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return nil |
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} |
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// IsValid check config and return error if config invalid
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func (c *Config) IsValid() error { |
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if c.ServiceName == "" { |
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return errors.New("empty service name") |
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} |
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if c.ServiceVersion == "" { |
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return errors.New("empty service version") |
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} |
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if (strings.Contains(c.TraceExporterEndpoint, "log.aliyuncs.com") && c.TraceExporterEndpointInsecure) || |
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(strings.Contains(c.MetricExporterEndpoint, "log.aliyuncs.com") && c.MetricExporterEndpointInsecure) { |
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return errors.New("insecure grpc is not allowed when send data to sls directly") |
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} |
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if strings.Contains(c.TraceExporterEndpoint, "log.aliyuncs.com") || strings.Contains(c.MetricExporterEndpoint, "log.aliyuncs.com") { |
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if c.Project == "" || c.InstanceID == "" || c.AccessKeyID == "" || c.AccessKeySecret == "" { |
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return errors.New("empty project, instanceID, accessKeyID or accessKeySecret when send data to sls directly") |
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} |
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if strings.ContainsAny(c.Project, "${}") || |
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strings.ContainsAny(c.InstanceID, "${}") || |
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strings.ContainsAny(c.AccessKeyID, "${}") || |
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strings.ContainsAny(c.AccessKeySecret, "${}") { |
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return errors.New("invalid project, instanceID, accessKeyID or accessKeySecret when send data to sls directly, you should replace these parameters with actual values") |
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} |
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} |
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return nil |
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} |
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// NewConfig create a config
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func NewConfig(opts ...Option) (*Config, error) { |
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var c Config |
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// 1. load env config
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envError := envconfig.Process(context.Background(), &c) |
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if envError != nil { |
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return nil, envError |
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} |
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// 2. load code config
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for _, opt := range opts { |
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opt(&c) |
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} |
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// 3. merge resource
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parseEnvKeys(&c) |
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mergeResource(&c) |
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return &c, c.IsValid() |
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} |
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// Start 初始化OpenTelemetry SDK，需要把 ${endpoint} 替换为实际的地址
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// 如果填写为stdout则为调试默认，数据将打印到标准输出
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func Start(c *Config) error { |
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if c.errorHandler != nil { |
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otel.SetErrorHandler(c.errorHandler) |
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} |
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traceExporter, _, traceExpStop, err := c.initOtelExporter(c.TraceExporterEndpoint, c.TraceExporterEndpointInsecure) |
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if err != nil { |
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return err |
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} |
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_, metricExporter, metricExpStop, err := c.initOtelExporter(c.MetricExporterEndpoint, c.MetricExporterEndpointInsecure) |
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if err != nil { |
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return err |
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} |
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err = c.initTracer(traceExporter, traceExpStop, c) |
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if err != nil { |
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return err |
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} |
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err = c.initMetric(metricExporter, metricExpStop) |
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return err |
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} |
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// Shutdown 优雅关闭，将OpenTelemetry SDK内存中的数据发送到服务端
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func Shutdown(c *Config) { |
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for _, stop := range c.stop { |
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stop() |
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} |
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} |
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Loading…
Reference in new issue