Fix Envoy proxy failing in tcp-metrics

Description: This fixes a previous open issue layer5io#39

Updated envoy.yaml
- Envoy now calls for typed_config
- Rearranged placement of the filters, but it probably can be reworked to make it cleaner
- Clusters is now set up with individual load assignment, no longer uses hosts

tcp-metrics/Cargo.toml

@@ -10,5 +10,5 @@ edition = "2018"
 crate-type = ["cdylib"]
 
 [dependencies]
-proxy-wasm = "0.1.0"
+proxy-wasm = "0.2.0"
 wasm-bindgen = "0.2"

tcp-metrics/envoy.yaml

@@ -7,57 +7,71 @@ static_resources:
         port_value: 80
     filter_chains:
     - filters:
-      - name: envoy.filters.network.wasm
-        config:
-          config:
-            name: "tcp_metrics"
-            root_id: "tcp_metrics"
-            vm_config:
-              runtime: "envoy.wasm.runtime.v8"
-              code:
-                local:
-                  filename: "/etc/tcp_metrics.wasm"
-              allow_precompiled: true
-      - name: envoy.tcp_proxy
-        config:
-          stat_prefix: ingress_tcp
-          cluster: web_service
+          - name: envoy.filters.network.tcp_proxy
+            typed_config:
+              "@type": type.googleapis.com/envoy.extensions.filters.network.tcp_proxy.v3.TcpProxy
+              stat_prefix: ingress_tcp
+              cluster: web_service
   - name: staticreply
     address:
       socket_address:
         address: 127.0.0.1
         port_value: 8099
     filter_chains:
-    - filters:
-      - name: envoy.http_connection_manager
-        config:
-          stat_prefix: ingress_http
-          codec_type: auto
-          route_config:
-            name: local_route
-            virtual_hosts:
-            - name: local_service
-              domains:
-              - "*"
-              routes:
-              - match:
-                  prefix: "/"
-                direct_response:
-                  status: 200
-                  body:
-                    inline_string: "example body\n"
-          http_filters:
-          - name: envoy.router
-            config: {}
+      - filters:
+          - name: envoy.http_connection_manager
+            typed_config:
+              "@type": type.googleapis.com/envoy.extensions.filters.network.http_connection_manager.v3.HttpConnectionManager
+              stat_prefix: ingress_http
+              codec_type: AUTO
+              route_config:
+                name: local_route
+                virtual_hosts:
+                  - name: local_service
+                    domains:
+                      - "*"
+                    routes:
+                      - match:
+                          prefix: "/"
+                        direct_response:
+                          status: 200
+                          body:
+                            inline_string: "example body\n"
+              http_filters:
+                - name: envoy.filters.http.wasm
+                  typed_config:
+                    "@type": type.googleapis.com/udpa.type.v1.TypedStruct
+                    type_url: type.googleapis.com/envoy.extensions.filters.http.wasm.v3.Wasm
+                    value:
+                      config:
+                        vm_config:
+                          vm_id: "tcp_metrics"
+                          runtime: "envoy.wasm.runtime.v8"
+                          code:
+                            local:
+                              filename: "/etc/tcp_metrics.wasm"
+                - name: envoy.filters.http.router
   clusters:
   - name: web_service
-    connect_timeout: 0.25s
     type: STRICT_DNS
     lb_policy: round_robin
-    hosts:
-    - socket_address:
-        address: web_service
-        port_value: 5678
+    connect_timeout: 0.25s
+    load_assignment:
+      cluster_name: web_service
+      endpoints:
+      - locality:
+          region: local
+          zone: zone-1
+        load_balancing_weight: 1
+        priority: 0
+        lb_endpoints:
+          - endpoint:
+              address:
+                socket_address:
+                  address: web_service
+                  port_value: 5678
+              hostname: web_service
+
 admin:
   access_log_path: "/dev/null"
   address: