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update tracing doc (#5643) 

Signed-off-by: Kuat Yessenov <kuat@google.com>
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Kuat 2019-11-12 14:10:54 -08:00 committed by Istio Automation
parent 4ea1f997f0
commit 8bdc407a6e
1 changed files with 7 additions and 1 deletions
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8
content/en/docs/tasks/observability/distributed-tracing/overview/index.md
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@ -10,7 +10,7 @@ aliases:
Distributed tracing enables users to track a request through mesh that is distributed across multiple services. Distributed tracing enables users to track a request through mesh that is distributed across multiple services.
This allows a deeper understanding about request latency, serialization and parallelism via visualization. This allows a deeper understanding about request latency, serialization and parallelism via visualization.
Istio leverages [Envoy's distributed tracing](https://www.envoyproxy.io/docs/envoy/v1.10.0/intro/arch_overview/tracing) feature Istio leverages [Envoy's distributed tracing](https://www.envoyproxy.io/docs/envoy/v1.12.0/intro/arch_overview/observability/tracing) feature
to provide tracing integration out of the box. Specifically, Istio provides options to install various tracing backend to provide tracing integration out of the box. Specifically, Istio provides options to install various tracing backend
and configure proxies to send trace spans to them automatically. and configure proxies to send trace spans to them automatically.
See [Zipkin](../zipkin/), [Jaeger](../jaeger/) and [LightStep](/docs/tasks/observability/distributed-tracing/lightstep/) task docs about how Istio works with those tracing systems. See [Zipkin](../zipkin/), [Jaeger](../jaeger/) and [LightStep](/docs/tasks/observability/distributed-tracing/lightstep/) task docs about how Istio works with those tracing systems.
@ -31,6 +31,12 @@ To do this, an application needs to collect and propagate the following headers
* `x-b3-flags` * `x-b3-flags`
* `x-ot-span-context` * `x-ot-span-context`
Additionally, tracing integrations based on [OpenCensus](https://opencensus.io/) (e.g. Stackdriver) propagate the following headers:
* `x-cloud-trace-context`
* `traceparent`
* `grpc-trace-bin`
If you look at the sample Python `productpage` service, for example, If you look at the sample Python `productpage` service, for example,
you see that the application extracts the required headers from an HTTP request you see that the application extracts the required headers from an HTTP request
using [OpenTracing](https://opentracing.io/) libraries: using [OpenTracing](https://opentracing.io/) libraries: