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adservice: use Stackdriver special field to set sampling decision in log entries (#168)

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This commit sets the new sampling decision field that is recognized by the
Stackdriver Logging agent, "logging.googleapis.com/traceSampled".  The sampling
decision field was added in
https://github.com/GoogleCloudPlatform/fluent-plugin-google-cloud/pull/297, and
it won't be available until the new version of fluent-plugin-google-cloud is
used in GKE.
This commit is contained in:
sebright 2019-02-28 21:34:57 -08:00 committed by Ahmet Alp Balkan
parent 458bf50b95
commit d08d419a94
1 changed files with 6 additions and 3 deletions
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9
src/adservice/src/main/resources/log4j2.xml
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@ -4,12 +4,15 @@
<Console name="STDOUT" target="SYSTEM_OUT">
<!-- This is a JSON format that can be read by the Stackdriver Logging agent. The trace ID,
span ID, and timestamp are interpreted by Stackdriver, and "traceSampled" is a custom
field. -->
span ID, sampling decision, and timestamp are interpreted by Stackdriver. It uses the
special JSON keys that the Stackdriver Logging agent converts to "trace", "spanId",
"traceSampled", and "timestamp" in the Stackdriver LogEntry
(https://cloud.google.com/logging/docs/agent/configuration#special-fields). -->
<JsonLayout compact="true" eventEol="true">
<KeyValuePair key="logging.googleapis.com/trace" value="$${ctx:traceId}"/>
<KeyValuePair key="logging.googleapis.com/spanId" value="$${ctx:spanId}"/>
<KeyValuePair key="traceSampled" value="$${ctx:traceSampled}"/>
<KeyValuePair key="logging.googleapis.com/traceSampled" value="$${ctx:traceSampled}"/>
<KeyValuePair key="time" value="$${date:yyyy-MM-dd}T$${date:HH:mm:ss.SSS}Z"/>
</JsonLayout>