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Document more source types #577

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Document HEALTH
jorbaum Feb 16, 2026
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Document SYS source type
jorbaum Feb 16, 2026
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8 changes: 8 additions & 0 deletions deploy-apps/streaming-logs.html.md.erb
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Expand Up @@ -97,6 +97,10 @@ For more information about Zipkin tracing, see [Zipkin tracking in HTTP headers]

Loggregator emits `LGR` logs to indicate problems with logging. Examples include `can't reach syslog drain url` and `dropped log messages due to high rate`.

### <a id='sys'></a> SYS

The Syslog Agent emits `SYS` logs to indicate problems with syslog drain delivery. This log type is emitted alongside `LGR` logs when messages are dropped due to slow drain consumption or connectivity issues. The `SYS` source type includes the source index of the Syslog Agent instance.

### <a id='app'></a> APP

Every app emits `APP` logs to Loggregator.
Expand Down Expand Up @@ -149,6 +153,10 @@ For example:
2016-06-14T13:44:38.14-0700 [CELL/0] OUT Successfully created container
</pre>

### <a id='health'></a> HEALTH

The Diego Cell emits `HEALTH` logs when running health check actions for an app. These logs are generated by the health check binary that monitors app instances. By default, health check log output is suppressed unless an error occurs.


## <a id='writing'></a> Writing to the log from your app

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