Smoketest google.com proxy config. (#477)

configs/configgen.sh

@@ -9,3 +9,4 @@ fi
 
 mkdir -p $1
 $BUILD_DIR/venv/bin/python $SCRIPT_DIR/configgen.py $1
+cp -f $SCRIPT_DIR/google_com_proxy.json $1

configs/google_com_proxy.json

@@ -0,0 +1,47 @@
+{
+    "listeners": [{
+        "port": 10000,
+        "filters": [{
+            "type": "read",
+            "name": "http_connection_manager",
+            "config": {
+                "codec_type": "auto",
+                "stat_prefix": "ingress_http",
+                "route_config": {
+                    "virtual_hosts": [{
+                        "name": "local_service",
+                        "domains": [
+                            "*"
+                        ],
+                        "routes": [{
+                            "timeout_ms": 0,
+                            "prefix": "/",
+                            "host_rewrite": "www.google.com",
+                            "cluster": "service_google"
+                        }]
+                    }]
+                },
+                "filters": [{
+                    "type": "decoder",
+                    "name": "router",
+                    "config": {}
+                }]
+            }
+        }]
+    }],
+    "admin": {
+        "access_log_path": "/tmp/admin_access.log",
+        "port": 9901
+    },
+    "cluster_manager": {
+        "clusters": [{
+            "name": "service_google",
+            "connect_timeout_ms": 250,
+            "type": "logical_dns",
+            "lb_type": "round_robin",
+            "hosts": [{
+                "url": "tcp://google.com:80"
+            }]
+        }]
+    }
+}

docs/install/ref_configs.rst

@@ -50,3 +50,15 @@ A few notes about the example configurations:
 * The configuration demonstrates the use of a :ref:`global rate limiting service
   <arch_overview_rate_limit>`. To disable this delete the :ref:`rate limit configuration
   <config_rate_limit_service>`.
+
+Smoketest configuration
+-----------------------
+
+A very minimal Envoy configuration that can be used to validate basic plain HTTP proxying is
+available in :repo:`configs/google_com_proxy.json`. This is not intended to represent a realistic
+Envoy deployment. To smoketest Envoy with this, run:
+
+.. code-block:: console
+
+  build/source/exe/envoy -c configs/google_com_proxy.json -l debug
+  curl -v localhost:10000