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mattklein123 merged 1 commit into from
Jan 20, 2021
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docs: Clarify Consecutive Gateway Failure docs #14738

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5 changes: 3 additions & 2 deletions docs/root/intro/arch_overview/upstream/outlier.rst
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Expand Up @@ -110,8 +110,9 @@ the :ref:`outlier_detection.consecutive_5xx<envoy_v3_api_field_config.cluster.v3
Consecutive Gateway Failure
^^^^^^^^^^^^^^^^^^^^^^^^^^^

This detection type takes into account a subset of 5xx errors, called "gateway errors" (502, 503 or 504 status code)
and is supported only by the :ref:`http router <config_http_filters_router>`.
In the default mode (:ref:`outlier_detection.split_external_local_origin_errors<envoy_v3_api_field_config.cluster.v3.OutlierDetection.split_external_local_origin_errors>` is *false*) this detection type takes into account a subset of 5xx errors, called "gateway errors" (502, 503 or 504 status code) and local origin failures, such as timeout, TCP reset etc.

In split mode (:ref:`outlier_detection.split_external_local_origin_errors<envoy_v3_api_field_config.cluster.v3.OutlierDetection.split_external_local_origin_errors>` is *true*) this detection type takes into account a subset of 5xx errors, called "gateway errors" (502, 503 or 504 status code) and is supported only by the :ref:`http router <config_http_filters_router>`.

If an upstream host returns some number of consecutive "gateway errors" (502, 503 or 504 status
code), it will be ejected.
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