Add dash0 tracing how-to (#4761)

* Add dash0 tracing how-to

Signed-off-by: Kasper Borg Nissen <kasper.nissen@dash0.com>

* remove unneeded link

Signed-off-by: Kasper Borg Nissen <kasper.nissen@dash0.com>

* add Dash0 to next steps list

Signed-off-by: Kasper Borg Nissen <kasper.nissen@dash0.com>

---------

Signed-off-by: Kasper Borg Nissen <kasper.nissen@dash0.com>

daprdocs/content/en/operations/observability/tracing/dash0.md

@@ -0,0 +1,205 @@
+---
+type: docs
+title: "How-To: Set up Dash0 for distributed tracing"
+linkTitle: "Dash0"
+weight: 5000
+description: "Set up Dash0 for distributed tracing"
+---
+
+Dapr captures metrics, traces, and logs that can be sent directly to Dash0 through the OpenTelemetry Collector. Dash0 is an OpenTelemetry-native observability platform that provides comprehensive monitoring capabilities for distributed applications.
+
+## Configure Dapr tracing with the OpenTelemetry Collector and Dash0
+
+By using the OpenTelemetry Collector with the OTLP exporter to send data to Dash0, you can configure Dapr to create traces for each application in your Kubernetes cluster and collect them in Dash0 for analysis and monitoring.
+
+## Prerequisites
+
+* A running Kubernetes cluster with `kubectl` installed
+* Helm v3+
+* [Dapr installed in the cluster](https://docs.dapr.io/operations/hosting/kubernetes/kubernetes-deploy/)
+* A Dash0 account ([Get started with a 14-day free trial](https://www.dash0.com/pricing))
+* Your Dash0 **Auth Token** and **OTLP/gRPC endpoint** (find both under **Settings → Auth Tokens** and **Settings → Endpoints**)
+
+
+## Configure the OpenTelemetry Collector 
+
+1) Create a namespace for the Collector
+
+```bash
+kubectl create namespace opentelemetry
+```
+
+2) Create a Secret with your Dash0 **Auth Token** and **Endpoint**
+
+```bash
+kubectl create secret generic dash0-secrets \
+  --from-literal=dash0-authorization-token="<your_auth_token>" \
+  --from-literal=dash0-endpoint="<your_otlp_grpc_endpoint>" \
+  --namespace opentelemetry
+```
+
+3) Add the OpenTelemetry Helm repo (once)
+
+```bash
+helm repo add open-telemetry https://open-telemetry.github.io/opentelemetry-helm-charts
+helm repo update
+```
+
+4) Create `values.yaml` for the Collector
+
+This config:
+
+* Reads token + endpoint from the Secret via env vars
+* Enables OTLP receivers (gRPC + HTTP)
+* Sends **traces, metrics, and logs** to Dash0 via OTLP/gRPC with Bearer auth
+
+```yaml
+mode: deployment
+fullnameOverride: otel-collector
+replicaCount: 1
+
+image:
+  repository: otel/opentelemetry-collector-k8s
+
+extraEnvs:
+  - name: DASH0_AUTHORIZATION_TOKEN
+    valueFrom:
+      secretKeyRef:
+        name: dash0-secrets
+        key: dash0-authorization-token
+  - name: DASH0_ENDPOINT
+    valueFrom:
+      secretKeyRef:
+        name: dash0-secrets
+        key: dash0-endpoint
+
+config:
+  receivers:
+    otlp:
+      protocols:
+        grpc: {}
+        http: {}
+
+  processors:
+    batch: {}
+
+  exporters:
+    otlp/dash0:
+      auth:
+        authenticator: bearertokenauth/dash0
+      endpoint: ${env:DASH0_ENDPOINT}
+
+  extensions:
+    bearertokenauth/dash0:
+      scheme: Bearer
+      token: ${env:DASH0_AUTHORIZATION_TOKEN}
+    health_check: {}
+
+  service:
+    extensions:
+      - bearertokenauth/dash0
+      - health_check
+    pipelines:
+      traces:
+        receivers: [otlp]
+        processors: [batch]
+        exporters: [otlp/dash0]
+      metrics:
+        receivers: [otlp]
+        processors: [batch]
+        exporters: [otlp/dash0]
+      logs:
+        receivers: [otlp]
+        processors: [batch]
+        exporters: [otlp/dash0]
+```
+
+5) Install/upgrade the Collector with Helm
+
+```bash
+helm upgrade --install otel-collector open-telemetry/opentelemetry-collector \
+  --namespace opentelemetry \
+  -f values.yaml
+```
+
+## Configure Dapr to send telemetry to the Collector
+
+1) Create a configuration
+
+Create `dapr-config.yaml`:
+
+```yaml
+apiVersion: dapr.io/v1alpha1
+kind: Configuration
+metadata:
+  name: tracing
+  namespace: default
+spec:
+  tracing:
+    samplingRate: "1"  
+    otel:
+      endpointAddress: "otel-collector.opentelemetry.svc.cluster.local:4317"
+      isSecure: false
+      protocol: grpc
+```
+
+Apply it:
+
+```bash
+kubectl apply -f dapr-config.yaml
+```
+
+2) Annotate your application(s)
+
+In each Deployment/Pod you want traced by Dapr, add:
+
+```yaml
+metadata:
+  annotations:
+    dapr.io/config: "tracing"
+```
+
+## Verify the setup
+
+1. Check that the OpenTelemetry Collector is running:
+
+```bash
+kubectl get pods -n opentelemetry
+```
+
+2. Check the collector logs to ensure it's receiving and forwarding telemetry:
+
+```bash
+kubectl logs -n opentelemetry deployment/otel-collector
+```
+
+3. Deploy a sample application with Dapr tracing enabled and generate some traffic to verify traces are being sent to Dash0. You can use the [Dapr Kubernetes quickstart tutorial](https://github.com/dapr/quickstarts/tree/master/tutorials/hello-kubernetes) for testing.
+
+## Viewing traces
+
+Once your setup is complete and telemetry data is flowing, you can view traces in Dash0:
+
+1. Navigate to your Dash0 account
+2. Go to the **Traces** section  
+3. You should see distributed traces from your Dapr applications
+4. Use filters to narrow down traces by service name, operation, or time range
+
+<img src="/images/dash0-dapr-trace-overview.png" width=1200 alt="Dash0 Trace Overview">
+
+<img src="/images/dash0-dapr-trace.png" width=1200 alt="Dash0 Trace Details">
+
+## Cleanup
+
+```bash
+helm -n opentelemetry uninstall otel-collector
+kubectl -n opentelemetry delete secret dash0-secrets
+kubectl delete ns opentelemetry
+```
+
+## Related Links
+
+* [Dapr Kubernetes quickstart tutorial](https://github.com/dapr/quickstarts/tree/master/tutorials/hello-kubernetes)
+* [Dapr observability quickstart](https://github.com/dapr/quickstarts/tree/master/tutorials/observability)
+* [Dash0 documentation](https://www.dash0.com/docs)
+* [OpenTelemetry Collector documentation](https://opentelemetry.io/docs/collector/)
+

daprdocs/content/en/operations/observability/tracing/setup-tracing.md

@@ -77,4 +77,5 @@ Learn how to set up tracing with one of the following tools:
 - [New Relic]({{< ref newrelic.md >}})
 - [Jaeger]({{< ref open-telemetry-collector-jaeger.md >}})
 - [Zipkin]({{< ref zipkin.md >}})
-- [Datadog]({{< ref datadog.md >}})
+- [Datadog]({{< ref datadog.md >}})
+- [Dash0]({{< ref dash0.md >}})