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2018-06-19 06:32:47 +00:00
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@@ -11,8 +11,7 @@ To that end, Sleuth:</p><div class="itemizedlist"><ul class="itemizedlist" style
For example, HTTP propagation works over Zipkin-compatible request headers.</li><li class="listitem">Sleuth can propagate context (also known as baggage) between processes.
Consequently, if you set a baggage element on a Span, it is sent downstream to other processes over either HTTP or messaging.</li><li class="listitem">Provides a way to create or continue spans and add tags and logs through annotations.</li><li class="listitem"><p class="simpara">If <code class="literal">spring-cloud-sleuth-zipkin</code> is on the classpath, the app generates and collects Zipkin-compatible traces.
By default, it sends them over HTTP to a Zipkin server on localhost (port 9411).
You can configure the location of the service by setting <code class="literal">spring.zipkin.baseUrl</code>.</p><div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: circle; "><li class="listitem">If you depend on <code class="literal">spring-rabbit</code> or <code class="literal">spring-kafka</code>, your app sends traces to a broker instead of HTTP.
**</li></ul></div></li></ul></div><div class="caution" style="margin-left: 0.5in; margin-right: 0.5in;"><table border="0" summary="Caution"><tr><td rowspan="2" align="center" valign="top" width="25"><img alt="[Caution]" src="images/caution.png"></td><th align="left">Caution</th></tr><tr><td align="left" valign="top"><p><code class="literal">spring-cloud-sleuth-stream</code> is deprecated and should no longer be used.</p></td></tr></table></div><div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "><li class="listitem">Spring Cloud Sleuth is <a class="link" href="http://opentracing.io/" target="_top">OpenTracing</a> compatible.</li></ul></div><div class="important" style="margin-left: 0.5in; margin-right: 0.5in;"><table border="0" summary="Important"><tr><td rowspan="2" align="center" valign="top" width="25"><img alt="[Important]" src="images/important.png"></td><th align="left">Important</th></tr><tr><td align="left" valign="top"><p>If you use Zipkin, configure the probability of spans exported by setting <code class="literal">spring.sleuth.sampler.probability</code>
You can configure the location of the service by setting <code class="literal">spring.zipkin.baseUrl</code>.</p><div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: circle; "><li class="listitem">If you depend on <code class="literal">spring-rabbit</code>, your app sends traces to a RabbitMQ broker instead of HTTP.</li><li class="listitem">If you depend on <code class="literal">spring-kafka</code>, and set <code class="literal">spring.zipkin.sender.type: kafka</code>, your app sends traces to a Kafka broker instead of HTTP.</li></ul></div></li></ul></div><div class="caution" style="margin-left: 0.5in; margin-right: 0.5in;"><table border="0" summary="Caution"><tr><td rowspan="2" align="center" valign="top" width="25"><img alt="[Caution]" src="images/caution.png"></td><th align="left">Caution</th></tr><tr><td align="left" valign="top"><p><code class="literal">spring-cloud-sleuth-stream</code> is deprecated and should no longer be used.</p></td></tr></table></div><div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "><li class="listitem">Spring Cloud Sleuth is <a class="link" href="http://opentracing.io/" target="_top">OpenTracing</a> compatible.</li></ul></div><div class="important" style="margin-left: 0.5in; margin-right: 0.5in;"><table border="0" summary="Important"><tr><td rowspan="2" align="center" valign="top" width="25"><img alt="[Important]" src="images/important.png"></td><th align="left">Important</th></tr><tr><td align="left" valign="top"><p>If you use Zipkin, configure the probability of spans exported by setting <code class="literal">spring.sleuth.sampler.probability</code>
(default: 0.1, which is 10 percent). Otherwise, you might think that Sleuth is not working be cause it omits some spans.</p></td></tr></table></div><div class="note" style="margin-left: 0.5in; margin-right: 0.5in;"><table border="0" summary="Note"><tr><td rowspan="2" align="center" valign="top" width="25"><img alt="[Note]" src="images/note.png"></td><th align="left">Note</th></tr><tr><td align="left" valign="top"><p>The SLF4J MDC is always set and logback users immediately see the trace and span IDs in logs per the example
shown earlier.
Other logging systems have to configure their own formatter to get the same result.