add devcontainer for wasm-go plugin developing (#749)

Co-authored-by: Xunzhuo <bitliu@tencent.com>

plugins/wasm-go/.devcontainer/Dockerfile

@@ -0,0 +1,23 @@
+FROM higress-registry.cn-hangzhou.cr.aliyuncs.com/higress/gateway:1.3.1
+
+FROM ubuntu:20.04
+
+RUN apt -y update \
+    && apt install -y --no-install-recommends python3-pip net-tools vim wget make curl git 2>&1 \
+    && apt install -y --reinstall ca-certificates \
+    && apt-get autoremove -y && apt-get clean \
+    && rm -rf /tmp/* /var/tmp/* \
+    && rm -rf /var/lib/apt/lists/*
+
+ENV PATH=/opt/tinygo/bin:/opt/go/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
+
+RUN wget --no-check-certificate https://github.com/tinygo-org/tinygo/releases/download/v0.29.0/tinygo0.29.0.linux-amd64.tar.gz \
+    && tar -zvxf tinygo0.29.0.linux-amd64.tar.gz -C /opt \
+    && rm tinygo0.29.0.linux-amd64.tar.gz
+
+RUN wget --no-check-certificate https://go.dev/dl/go1.19.linux-amd64.tar.gz \
+    && tar -zvxf go1.19.linux-amd64.tar.gz -C /opt \
+    && rm go1.19.linux-amd64.tar.gz \
+    && go install -v golang.org/x/tools/gopls@latest
+
+COPY --from=0 /usr/local/bin/envoy /usr/local/bin/envoy

plugins/wasm-go/.devcontainer/devcontainer.json

@@ -0,0 +1,21 @@
+{
+    "name": "Wasm Go Dev",
+    // "dockerFile": "Dockerfile",
+    "image": "liuxr25/wasm-go:tinygo-0.29.0",
+    "runArgs": [
+      "--user=root"
+    ],
+    "customizations": {
+      "vscode": {
+        "settings": {
+          "terminal.integrated.shell.linux": "/bin/bash",
+          "python.pythonPath": "/usr/bin/python3"
+        },
+        "extensions": [
+          "ms-python.python",
+          "golang.go"
+        ]
+      }
+    }
+  }
+  

plugins/wasm-go/.devcontainer/gen_config.py

@@ -0,0 +1,76 @@
+import json
+import sys
+
+
+plugin_name = sys.argv[1]
+
+with open("extensions/"+plugin_name+"/config.json", "r") as f:
+    plugin_config = json.load(f)
+
+config = f'''static_resources:
+  listeners:
+  - address:
+      socket_address:
+        address: 0.0.0.0
+        port_value: 8080
+    filter_chains:
+    - filters:
+      - name: envoy.filters.network.http_connection_manager
+        typed_config:
+          '@type': type.googleapis.com/envoy.extensions.filters.network.http_connection_manager.v3.HttpConnectionManager
+          codec_type: AUTO
+          stat_prefix: ingress_http
+          route_config:
+            name: test
+            virtual_hosts:
+            - name: direct_response_service
+              domains: 
+              - "*"
+              routes:
+              - match:
+                  prefix: "/"
+                direct_response:
+                  status: 200
+                  body:
+                    inline_string: "hello world\\n"
+              # - match:
+              #     prefix: "/"
+              #   route:
+              #     cluster: service-backend
+          http_filters:
+          - name: {plugin_name}
+            typed_config:
+              "@type": type.googleapis.com/udpa.type.v1.TypedStruct
+              type_url: type.googleapis.com/envoy.extensions.filters.http.wasm.v3.Wasm
+              value:
+                config:
+                  name: wasmdemo
+                  vm_config:
+                    runtime: envoy.wasm.runtime.v8
+                    code:
+                      local:
+                        filename: ./extensions/{plugin_name}/main.wasm
+                  configuration:
+                    "@type": "type.googleapis.com/google.protobuf.StringValue"
+                    value: '{json.dumps(plugin_config)}'
+          - name: envoy.filters.http.router
+            typed_config:
+              '@type': type.googleapis.com/envoy.extensions.filters.http.router.v3.Router
+  # clusters:
+  # - name: service-backend
+  #   connect_timeout: 600s
+  #   type: STATIC
+  #   lb_policy: ROUND_ROBIN
+  #   load_assignment:
+  #     cluster_name: service-backend
+  #     endpoints:
+  #       - lb_endpoints:
+  #           - endpoint:
+  #               address:
+  #                 socket_address:
+  #                   address: 127.0.0.1
+  #                   port_value: 8000
+'''
+
+with open("extensions/"+plugin_name+"/config.yaml", "w") as f:
+    f.write(config)

plugins/wasm-go/Makefile

@@ -60,3 +60,16 @@ builder:
 			.
 	@echo ""
 	@echo "image: ${BUILDER}"
+
+local-build:
+	tinygo build -scheduler=none -target=wasi -gc=custom -tags='custommalloc nottinygc_finalizer' \
+		-o extensions/${PLUGIN_NAME}/main.wasm \
+		extensions/${PLUGIN_NAME}/main.go
+	@echo ""
+	@echo "wasm: extensions/${PLUGIN_NAME}/main.wasm"
+
+local-run:
+	python3 .devcontainer/gen_config.py ${PLUGIN_NAME}
+	envoy -c extensions/${PLUGIN_NAME}/config.yaml --concurrency 0 --log-level info --component-log-level wasm:debug
+
+local-all: local-build local-run