grpc-transcode
HTTP(s) -> APISIX -> gRPC server
Proto
参数
content
:.proto
文件的内容
添加proto
路径中最后的数字,会被用作 proto 的 id 做唯一标识,比如下面示例的 proto id
是 1
:
curl http://127.0.0.1:9080/apisix/admin/proto/1 -H 'X-API-KEY: edd1c9f034335f136f87ad84b625c8f1' -X PUT -d '
{
"content" : "syntax = \"proto3\";
package helloworld;
service Greeter {
rpc SayHello (HelloRequest) returns (HelloReply) {}
}
message HelloRequest {
string name = 1;
}
message HelloReply {
string message = 1;
}"
}'
参数列表
proto_id
:.proto
内容的id.service
: grpc服务名.method
: grpc服务中要调用的方法名.pb_option
: proto 编码过程中的转换选项. [ “int64_as_string” / “enum_as_value” / “auto_default_values” / “enable_hooks” ]
示例
使用 grpc-transcode 插件
在指定 route 中,代理 grpc 服务接口:
- 注意: 这个 route 的属性
service_protocol
必须设置为grpc
- 例子所代理的 grpc 服务可参考:grpc_server_example
curl http://127.0.0.1:9080/apisix/admin/routes/111 -H 'X-API-KEY: edd1c9f034335f136f87ad84b625c8f1' -X PUT -d '
{
"methods": ["GET"],
"uri": "/grpctest",
"service_protocol": "grpc",
"plugins": {
"grpc-transcode": {
"proto_id": "1",
"service": "helloworld.Greeter",
"method": "SayHello"
}
},
"upstream": {
"type": "roundrobin",
"nodes": {
"127.0.0.1:50051": 1
}
}
}'
测试
访问上面配置的 route:
$ curl -i http://127.0.0.1:9080/grpctest?name=world
HTTP/1.1 200 OK
Date: Fri, 16 Aug 2019 11:55:36 GMT
Content-Type: application/json
Transfer-Encoding: chunked
Connection: keep-alive
Server: APISIX web server
Proxy-Connection: keep-alive
{"message":"Hello world"}
这表示已成功代理。
使用 grpc-transcode 插件的 pb_option 选项
在指定 route 中,代理 grpc 服务接口:
选项清单
枚举类型
enum_as_name enum_as_value
64位整型
int64_as_number int64_as_string int64_as_hexstring
使用默认值
auto_default_values no_default_values use_default_values use_default_metatable
Hooks开关
enable_hooks disable_hooks
curl http://127.0.0.1:9080/apisix/admin/routes/23 -H 'X-API-KEY: edd1c9f034335f136f87ad84b625c8f1' -X PUT -d '
{
"methods": ["GET"],
"uri": "/zeebe/WorkflowInstanceCreate",
"service_protocol": "grpc",
"plugins": {
"grpc-transcode": {
"proto_id": "1",
"service": "gateway_protocol.Gateway",
"method": "CreateWorkflowInstance",
"pb_option":["int64_as_string"]
}
},
"upstream": {
"type": "roundrobin",
"nodes": {
"127.0.0.1:26500": 1
}
}
}'
测试 pb_option 参数
访问上面配置的 route:
$ curl -i "http://127.0.0.1:9080/zeebe/WorkflowInstanceCreate?bpmnProcessId=order-process&version=1&variables=\{\"orderId\":\"7\",\"ordervalue\":99\}"
HTTP/1.1 200 OK
Date: Wed, 13 Nov 2019 03:38:27 GMT
Content-Type: application/json
Transfer-Encoding: chunked
Connection: keep-alive
grpc-encoding: identity
grpc-accept-encoding: gzip
Server: APISIX web server
Trailer: grpc-status
Trailer: grpc-message
{"workflowKey":"#2251799813685260","workflowInstanceKey":"#2251799813688013","bpmnProcessId":"order-process","version":1}
"workflowKey":"#2251799813685260"
这表示已成功。