Zipkin

Zipkin

After completing this task, you understand how to have your application participate in tracing with Zipkin,regardless of the language, framework, or platform you use to build your application.

This task uses the Bookinfo sample as the example application.

To learn how Istio handles tracing, visit this task’s overview.

Before you begin

To set up Istio, follow the instructions in the Installation guideand then configure:

a) a demo/test environment by setting the —set values.tracing.enabled=true and —set values.tracing.provider=zipkin install options to enable tracing “out of the box”

b) a production environment by referencing an existing Zipkin instance and then setting the —set values.global.tracer.zipkin.address=<zipkin-collector-service>.<zipkin-collector-namespace>:9411 install option.

When you enable tracing, you can set the sampling rate that Istio uses for tracing.Use the pilot.traceSampling option to set the sampling rate. The default sampling rate is 1%.

Deploy the Bookinfo sample application.

Accessing the dashboard

Remotely Accessing Telemetry Addons details how to configure access to the Istio addons through a gateway. Alternatively, to use a Kubernetes ingress, specify the option —set values.tracing.ingress.enabled=true during install.

For testing (and temporary access), you may also use port-forwarding. Use the following, assuming you’ve deployed Zipkin to the istio-system namespace:

$ kubectl -n istio-system port-forward $(kubectl -n istio-system get pod -l app=zipkin -o jsonpath='{.items[0].metadata.name}') 15032:9411

Open your browser to http://localhost:15032.

Generating traces using the Bookinfo sample

When the Bookinfo application is up and running, access http://$GATEWAY_URL/productpage one or more timesto generate trace information.

To see trace data, you must send requests to your service. The number of requests depends on Istio’s sampling rate.You set this rate when you install Istio. The default sampling rate is 1%. You need to send at least 100 requests before the first trace is visible.To send a 100 requests to the productpage service, use the following command:

$ for i in `seq 1 100`; do curl -s -o /dev/null http://$GATEWAY_URL/productpage; done

From the top panel, select a service of interest (or ‘all’) from the Service Name drop-down list and clickFind Traces:

Tracing Dashboard

Click on the most recent trace at the top to see the details corresponding to thelatest request to the /productpage:

Detailed Trace View

The trace is comprised of a set of spans,where each span corresponds to a Bookinfo service, invoked during the execution of a /productpage request, orinternal Istio component, for example: istio-ingressgateway.

Cleanup

Remove any kubectl port-forward processes that may still be running:

$ killall kubectl

If you are not planning to explore any follow-on tasks, refer to theBookinfo cleanup instructionsto shutdown the application.

Zipkin

Zipkin

Before you begin

Accessing the dashboard

Generating traces using the Bookinfo sample

Cleanup

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