Add Jaeger setup instruction (#950) (#969)

* Add Jaeger setup instruction

* Fix yaml file name

* Address review feedback

* Update per PR feedback

* Remove 'we'

Co-authored-by: Ori Zohar <orzohar@microsoft.com>

Co-authored-by: Ori Zohar <orzohar@microsoft.com>

daprdocs/content/en/operations/monitoring/jaeger.md

@@ -0,0 +1,159 @@
+---
+type: docs
+title: "How-To: Set up Jaeger for distributed tracing"
+linkTitle: "Jaeger"
+weight: 3000
+description: "Set up Jaeger for distributed tracing"
+type: docs
+---
+Dapr currently supports two kind of tracing protocol: OpenCensus and
+Zipkin. Since Jaeger is compatible with Zipkin, the Zipkin
+protocol can be used to talk to Jaeger.
+
+## Configure self hosted mode
+
+### Setup
+
+The simplest way to start Jaeger is to use the pre-built all-in-one
+Jaeger image published to DockerHub:
+
+```bash
+docker run -d --name jaeger \
+  -e COLLECTOR_ZIPKIN_HTTP_PORT=9412 \
+  -p 16686:16686 \
+  -p 9412:9412 \
+  jaegertracing/all-in-one:1.21
+```
+
+
+Next, create the following YAML files locally:
+
+* **jaeger.yaml**: Note that because we are using the Zipkin protocol to talk to Jaeger,
+the type of the exporter in the YAML file below is `exporter.zipkin`,
+while the `exporterAddress` is the address of the Jaeger instance.
+
+```yaml
+apiVersion: dapr.io/v1alpha1
+kind: Component
+metadata:
+  name: zipkin
+spec:
+  type: exporters.zipkin
+  metadata:
+  - name: enabled
+    value: "true"
+  - name: exporterAddress
+    value: "http://localhost:9412/api/v2/spans"
+```
+
+To launch the application referring to the new YAML file, you can use
+`--components-path`. Assuming that, the **jaeger.yaml** file is in the
+current directory, you can use
+
+```bash
+dapr run --app-id mynode --app-port 3000 node app.js --components-path .
+```
+
+### Viewing Traces
+To view traces, in your browser go to http://localhost:16686 and you
+will see the Zipkin UI.
+
+## Configure Kubernetes
+The following steps shows you how to configure Dapr to send distributed tracing data to Jaeger running as a container in your Kubernetes cluster, how to view them.
+
+### Setup
+
+First create the following YAML file to install Jaeger
+* jaeger-operator.yaml
+```yaml
+apiVersion: jaegertracing.io/v1
+kind: "Jaeger"
+metadata:
+  name: "jaeger"
+spec:
+  strategy: allInOne
+  ingress:
+    enabled: false
+  allInOne:
+    image: jaegertracing/all-in-one:1.13
+    options:
+      query:
+        base-path: /jaeger
+```
+
+Now, use the above YAML file to install Jaeger
+```bash
+# Install Jaeger
+helm repo add jaegertracing https://jaegertracing.github.io/helm-charts
+helm install jaeger-operator jaegertracing/jaeger-operator
+kubectl apply -f jaeger-operator.yaml
+
+# Wait for Jaeger to be up and running
+kubectl wait deploy --selector app.kubernetes.io/name=jaeger --for=condition=available
+```
+
+Next, create the following YAML files locally:
+
+* **jaeger.yaml**: Note that because we are using the Zipkin protocol to talk to Jaeger,
+the type of the exporter in the YAML file below is `exporter.zipkin`,
+while the `exporterAddress` is the address of the Jaeger instance.
+
+
+```yaml
+apiVersion: dapr.io/v1alpha1
+kind: Component
+metadata:
+  name: zipkin
+spec:
+  type: exporters.zipkin
+  metadata:
+  - name: enabled
+    value: "true"
+  - name: exporterAddress
+    value: "http://jaeger-collector.default.svc.cluster.local:9411/api/v2/spans"
+```
+
+* **tracing.yaml**
+
+```yaml
+apiVersion: dapr.io/v1alpha1
+kind: Configuration
+metadata:
+  name: tracing
+  namespace: default
+spec:
+  tracing:
+    samplingRate: "1"
+```
+
+Finally, deploy the the Dapr component and configuration files:
+
+```bash
+kubectl apply -f tracing.yaml
+kubectl apply -f jaeger.yaml
+```
+
+In order to enable this configuration for your Dapr sidecar, add the following annotation to your pod spec template:
+
+```yml
+annotations:
+  dapr.io/config: "tracing"
+```
+
+That's it! your sidecar is now configured for use with Jaeger.
+
+### Viewing Tracing Data
+
+To view traces, connect to the Jaeger Service and open the UI:
+
+```bash
+kubectl port-forward svc/jaeger-query 16686
+```
+
+In your browser, go to `http://localhost:16686` and you will see the Jaeger UI.
+
+![jaeger](/images/jaeger_ui.png)
+
+## References
+- [Jaeger Getting Started](https://www.jaegertracing.io/docs/1.21/getting-started/#all-in-one)
+- [W3C distributed tracing]({{< ref w3c-tracing >}})