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docs: route matching details #17

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Original file line number Diff line number Diff line change
Expand Up @@ -53,3 +53,4 @@ response_headers_to_remove
vhost
route
vcluster
route_matching
12 changes: 12 additions & 0 deletions docs/configuration/http_conn_man/route_config/route_matching.rst
Original file line number Diff line number Diff line change
@@ -0,0 +1,12 @@
Route matching
==============

When Envoy matches a route, it uses the following procedure:

#. The HTTP request's *host* or *:authority* header is matched to a :ref:`virtual host
<config_http_conn_man_route_table_vhost>`.
#. Each :ref:`route entry <config_http_conn_man_route_table_route>` in the virtual host is checked,
*in order*. If there is a match, the route is used and no further route checks are made.
#. Independently, each :ref:`virtual cluster <config_http_conn_man_route_table_vcluster>` in the
virtual host is checked, *in order*. If there is a match, the virtual cluster is used and no
further virtual cluster checks are made.