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otelcol.exporter.debug component (#5867)
New otelcol.exporter.debug component. --------- Co-authored-by: Paulin Todev <paulin.todev@gmail.com>
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docs/sources/flow/reference/components/otelcol.exporter.debug.md
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| --- | ||
| aliases: | ||
| - /docs/grafana-cloud/agent/flow/reference/components/otelcol.exporter.debug/ | ||
| - /docs/grafana-cloud/monitor-infrastructure/agent/flow/reference/components/otelcol.exporter.debug/ | ||
| - /docs/grafana-cloud/monitor-infrastructure/integrations/agent/flow/reference/components/otelcol.exporter.debug/ | ||
| - /docs/grafana-cloud/send-data/agent/flow/reference/components/otelcol.exporter.debug/ | ||
| canonical: https://grafana.com/docs/agent/latest/flow/reference/components/otelcol.exporter.debug/ | ||
| description: Learn about otelcol.exporter.debug | ||
| labels: | ||
| stage: experimental | ||
| title: otelcol.exporter.debug | ||
| --- | ||
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| # otelcol.exporter.debug | ||
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| `otelcol.exporter.debug` accepts telemetry data from other `otelcol` components and writes them to the console (stderr). | ||
| You can control the verbosity of the logs. | ||
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| {{< admonition type="note" >}} | ||
| `otelcol.exporter.debug` is a wrapper over the upstream OpenTelemetry Collector `debug` exporter. | ||
| If necessary, bug reports or feature requests are redirected to the upstream repository. | ||
| {{< /admonition >}} | ||
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| Multiple `otelcol.exporter.debug` components can be specified by giving them different labels. | ||
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| ## Usage | ||
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| ```river | ||
| otelcol.exporter.debug "LABEL" { } | ||
| ``` | ||
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| ## Arguments | ||
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| `otelcol.exporter.debug` supports the following arguments: | ||
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| Name | Type | Description | Default | Required | ||
| ---- | ---- | ----------- | ------- | -------- | ||
| `verbosity` | `string` | Verbosity of the generated logs. | `"normal"` | no | ||
| `sampling_initial` | `int` | Number of messages initially logged each second. | `2` | no | ||
| `sampling_thereafter` | `int` | Sampling rate after the initial messages are logged. | `500` | no | ||
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| The `verbosity` argument must be one of `"basic"`, `"normal"`, or `"detailed"`. | ||
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| ## Exported fields | ||
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| The following fields are exported and can be referenced by other components: | ||
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| Name | Type | Description | ||
| ---- | ---- | ----------- | ||
| `input` | `otelcol.Consumer` | A value that other components can use to send telemetry data to. | ||
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| `input` accepts `otelcol.Consumer` data for any telemetry signal (metrics, | ||
| logs, or traces). | ||
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| ## Component health | ||
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| `otelcol.exporter.debug` is only reported as unhealthy if given an invalid | ||
| configuration. | ||
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| ## Debug information | ||
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| `otelcol.exporter.debug` does not expose any component-specific debug | ||
| information. | ||
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| ## Example | ||
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| This example scrapes Prometheus UNIX metrics and writes them to the console: | ||
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| ```river | ||
| prometheus.exporter.unix "default" { } | ||
| prometheus.scrape "default" { | ||
| targets = prometheus.exporter.unix.default.targets | ||
| forward_to = [otelcol.receiver.prometheus.default.receiver] | ||
| } | ||
| otelcol.receiver.prometheus "default" { | ||
| output { | ||
| metrics = [otelcol.exporter.debug.default.input] | ||
| } | ||
| } | ||
| otelcol.exporter.debug "default" { | ||
| verbosity = "detailed" | ||
| sampling_initial = 1 | ||
| sampling_thereafter = 1 | ||
| } | ||
| ``` | ||
| <!-- START GENERATED COMPATIBLE COMPONENTS --> | ||
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| ## Compatible components | ||
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| `otelcol.exporter.debug` has exports that can be consumed by the following components: | ||
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| - Components that consume [OpenTelemetry `otelcol.Consumer`](../../compatibility/#opentelemetry-otelcolconsumer-consumers) | ||
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| {{< admonition type="note" >}} | ||
| Connecting some components may not be sensible or components may require further configuration to make the connection work correctly. | ||
| Refer to the linked documentation for more details. | ||
| {{< /admonition >}} | ||
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| <!-- END GENERATED COMPATIBLE COMPONENTS --> |
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,96 @@ | ||
| package debug | ||
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| import ( | ||
| "fmt" | ||
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| "github.com/grafana/agent/internal/component" | ||
| "github.com/grafana/agent/internal/component/otelcol" | ||
| "github.com/grafana/agent/internal/component/otelcol/exporter" | ||
| "github.com/grafana/agent/internal/featuregate" | ||
| otelcomponent "go.opentelemetry.io/collector/component" | ||
| "go.opentelemetry.io/collector/config/configtelemetry" | ||
| debugexporter "go.opentelemetry.io/collector/exporter/debugexporter" | ||
| otelextension "go.opentelemetry.io/collector/extension" | ||
| ) | ||
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| func init() { | ||
| component.Register(component.Registration{ | ||
| Name: "otelcol.exporter.debug", | ||
| Args: Arguments{}, | ||
| Exports: otelcol.ConsumerExports{}, | ||
| Stability: featuregate.StabilityExperimental, | ||
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| Build: func(opts component.Options, args component.Arguments) (component.Component, error) { | ||
| fact := debugexporter.NewFactory() | ||
| return exporter.New(opts, fact, args.(Arguments), exporter.TypeAll) | ||
| }, | ||
| }) | ||
| } | ||
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| type Arguments struct { | ||
| Verbosity string `river:"verbosity,attr,optional"` | ||
| SamplingInitial int `river:"sampling_initial,attr,optional"` | ||
| SamplingThereafter int `river:"sampling_thereafter,attr,optional"` | ||
| } | ||
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| func (args Arguments) convertVerbosity() (configtelemetry.Level, error) { | ||
| var verbosity configtelemetry.Level | ||
| switch args.Verbosity { | ||
| case "basic": | ||
| verbosity = configtelemetry.LevelBasic | ||
| case "normal": | ||
| verbosity = configtelemetry.LevelNormal | ||
| case "detailed": | ||
| verbosity = configtelemetry.LevelDetailed | ||
| default: | ||
| // Invalid verbosity | ||
| // debugexporter only supports basic, normal and detailed levels | ||
| return verbosity, fmt.Errorf("invalid verbosity %q", args.Verbosity) | ||
| } | ||
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| return verbosity, nil | ||
| } | ||
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| var _ exporter.Arguments = Arguments{} | ||
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| // DefaultArguments holds default values for Arguments. | ||
| var DefaultArguments = Arguments{ | ||
| Verbosity: "normal", | ||
| SamplingInitial: 2, | ||
| SamplingThereafter: 500, | ||
| } | ||
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| // SetToDefault implements river.Defaulter. | ||
| func (args *Arguments) SetToDefault() { | ||
| *args = DefaultArguments | ||
| } | ||
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| // Convert implements exporter.Arguments. | ||
| func (args Arguments) Convert() (otelcomponent.Config, error) { | ||
| verbosity, err := args.convertVerbosity() | ||
| if err != nil { | ||
| return nil, fmt.Errorf("error in conversion to config arguments, %v", err) | ||
| } | ||
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| return &debugexporter.Config{ | ||
| Verbosity: verbosity, | ||
| SamplingInitial: args.SamplingInitial, | ||
| SamplingThereafter: args.SamplingThereafter, | ||
| }, nil | ||
| } | ||
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| // Extensions implements exporter.Arguments. | ||
| func (args Arguments) Extensions() map[otelcomponent.ID]otelextension.Extension { | ||
| return nil | ||
| } | ||
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| // Exporters implements exporter.Arguments. | ||
| func (args Arguments) Exporters() map[otelcomponent.DataType]map[otelcomponent.ID]otelcomponent.Component { | ||
| return nil | ||
| } | ||
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| // DebugMetricsConfig implements receiver.Arguments. | ||
| func (args Arguments) DebugMetricsConfig() otelcol.DebugMetricsArguments { | ||
| var debugMetrics otelcol.DebugMetricsArguments | ||
| return debugMetrics | ||
| } |
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| package debug_test | ||
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| import ( | ||
| "fmt" | ||
| "testing" | ||
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| "github.com/grafana/agent/internal/component/otelcol/exporter/debug" | ||
| "github.com/grafana/river" | ||
| "github.com/stretchr/testify/require" | ||
| otelcomponent "go.opentelemetry.io/collector/component" | ||
| "go.opentelemetry.io/collector/config/configtelemetry" | ||
| debugexporter "go.opentelemetry.io/collector/exporter/debugexporter" | ||
| ) | ||
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| func Test(t *testing.T) { | ||
| tests := []struct { | ||
| testName string | ||
| args string | ||
| expectedReturn debugexporter.Config | ||
| errorMsg string | ||
| }{ | ||
| { | ||
| testName: "defaultConfig", | ||
| args: ``, | ||
| expectedReturn: debugexporter.Config{ | ||
| Verbosity: configtelemetry.LevelNormal, | ||
| SamplingInitial: 2, | ||
| SamplingThereafter: 500, | ||
| }, | ||
| }, | ||
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| { | ||
| testName: "validConfig", | ||
| args: ` | ||
| verbosity = "detailed" | ||
| sampling_initial = 5 | ||
| sampling_thereafter = 20 | ||
| `, | ||
| expectedReturn: debugexporter.Config{ | ||
| Verbosity: configtelemetry.LevelDetailed, | ||
| SamplingInitial: 5, | ||
| SamplingThereafter: 20, | ||
| }, | ||
| }, | ||
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| { | ||
| testName: "invalidConfig", | ||
| args: ` | ||
| verbosity = "test" | ||
| sampling_initial = 5 | ||
| sampling_thereafter = 20 | ||
| `, | ||
| errorMsg: "error in conversion to config arguments", | ||
| }, | ||
| } | ||
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| for _, tc := range tests { | ||
| t.Run(tc.testName, func(t *testing.T) { | ||
| var args debug.Arguments | ||
| err := river.Unmarshal([]byte(tc.args), &args) | ||
| require.NoError(t, err) | ||
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| actualPtr, err := args.Convert() | ||
| if tc.errorMsg != "" { | ||
| require.ErrorContains(t, err, tc.errorMsg) | ||
| return | ||
| } | ||
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| require.NoError(t, err) | ||
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| actual := actualPtr.(*debugexporter.Config) | ||
| fmt.Printf("Passed conversion") | ||
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| require.NoError(t, otelcomponent.ValidateConfig(actual)) | ||
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| require.Equal(t, tc.expectedReturn, *actual) | ||
| }) | ||
| } | ||
| } |