Support OpenAI embedding.

[duxin40]

Ⅰ. Describe what this PR did

This PR is to support openai embedding.

Ⅱ. Does this pull request fix one issue?

Fix #1443.

Ⅲ. Why don't you add test cases (unit test/integration test)?

Ⅳ. Describe how to verify it

1. build ai-proxy:

cd ./higress/plugins/wasm-go/extensions/ai-proxy

tinygo build -o ai.wasm -scheduler=none -target=wasi -gc=custom -tags="custommalloc nottinygc_finalizer proxy_wasm_version_0_2_100" ./

2. build ai-cache

cd ./higress/plugins/wasm-go/extensions/ai-cache

tinygo build -o main.wasm -scheduler=none -target=wasi -gc=custom -tags="custommalloc nottinygc_finalizer proxy_wasm_version_0_2_100" ./

3. start higress

docker-compose.yaml:

services:
  envoy:
    image: higress-registry.cn-hangzhou.cr.aliyuncs.com/higress/gateway:v2.0.2
    entrypoint: /usr/local/bin/envoy
    command: -c /etc/envoy/envoy.yaml --component-log-level wasm:debug
    networks:
      - wasmtest
    ports:
      - "10002:10002"
    volumes:
      - ./envoy.yaml:/etc/envoy/envoy.yaml
      - ./main.wasm:/etc/envoy/main.wasm
      - ../ai-proxy/ai.wasm:/etc/envoy/ai.wasm

networks:
  wasmtest: {}

envoy.yaml:

admin:
  address:
    socket_address:
      protocol: TCP
      address: 0.0.0.0
      port_value: 9901
static_resources:
  listeners:
    - name: listener_0
      address:
        socket_address:
          protocol: TCP
          address: 0.0.0.0
          port_value: 10002
      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
                scheme_header_transformation:
                  scheme_to_overwrite: https
                stat_prefix: ingress_http
                # Output envoy logs to stdout
                access_log:
                  - name: envoy.access_loggers.stdout
                    typed_config:
                      "@type": type.googleapis.com/envoy.extensions.access_loggers.stream.v3.StdoutAccessLog
                # Modify as required
                route_config:
                  name: local_route
                  virtual_hosts:
                    - name: local_service
                      domains: [ "*" ]
                      routes:
                        - match:
                            prefix: "/"
                          route:
                            cluster: openai
                            timeout: 300s
                http_filters:
                  - name: wasmtest
                    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: wasmtest
                          vm_config:
                            runtime: envoy.wasm.runtime.v8
                            code:
                              local:
                                filename: /etc/envoy/ai.wasm
                          configuration:
                            "@type": "type.googleapis.com/google.protobuf.StringValue"
                            value: |
                              {
                                "provider": {
                                  "type": "openai",
                                  "apiTokens": [
                                    "sk-"
                                  ]
                                }
                              }

                  - name: cache
                    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: cache
                          vm_config:
                            runtime: envoy.wasm.runtime.v8
                            code:
                              local:
                                filename: /etc/envoy/main.wasm
                          configuration:
                            "@type": "type.googleapis.com/google.protobuf.StringValue"
                            value: |
                              {
                                "embedding": {
                                  "type": "openai",
                                  "serviceName": "openai.dns",
                                  "apiKey": "sk-"
                                },
                                "vector": {
                                  "type": "dashvector",
                                  "serviceName": "dashvector.dns",
                                  "collectionID": "test1",
                                  "serviceHost": "your host",
                                  "apiKey": "your key",
                                  "threshold": 0.4
                                },
                                "cache": {
                                  "serviceName": "",
                                  "type": ""
                                }
                              }
                  - name: envoy.filters.http.router
                    typed_config:
                      "@type": type.googleapis.com/envoy.extensions.filters.http.router.v3.Router
  clusters:
    - name: openai
      connect_timeout: 30s
      type: LOGICAL_DNS
      dns_lookup_family: V4_ONLY
      lb_policy: ROUND_ROBIN
      load_assignment:
        cluster_name: openai
        endpoints:
          - lb_endpoints:
              - endpoint:
                  address:
                    socket_address:
                      address: api.openai.com
                      port_value: 443
      transport_socket:
        name: envoy.transport_sockets.tls
        typed_config:
          "@type": type.googleapis.com/envoy.extensions.transport_sockets.tls.v3.UpstreamTlsContext
          "sni": "api.openai.com"

    - name: outbound|443||openai.dns
      connect_timeout: 30s
      type: LOGICAL_DNS
      dns_lookup_family: V4_ONLY
      lb_policy: ROUND_ROBIN
      load_assignment:
        cluster_name: outbound|443||openai.dns
        endpoints:
          - lb_endpoints:
              - endpoint:
                  address:
                    socket_address:
                      address: api.openai.com
                      port_value: 443
      transport_socket:
        name: envoy.transport_sockets.tls
        typed_config:
          "@type": type.googleapis.com/envoy.extensions.transport_sockets.tls.v3.UpstreamTlsContext
          "sni": "api.openai.com"

    - name: outbound|443||dashvector.dns
      connect_timeout: 30s
      type: LOGICAL_DNS
      dns_lookup_family: V4_ONLY
      lb_policy: ROUND_ROBIN
      load_assignment:
        cluster_name: outbound|443||dashvector.dns
        endpoints:
          - lb_endpoints:
              - endpoint:
                  address:
                    socket_address:
                      address: vrs-*aliyuncs.com
                      port_value: 443
      transport_socket:
        name: envoy.transport_sockets.tls
        typed_config:
          "@type": type.googleapis.com/envoy.extensions.transport_sockets.tls.v3.UpstreamTlsContext
          "sni": "vrs-*aliyuncs.com"

4. curl test
   request:

curl "http://localhost:10002/ai/v1/chat/completions"  -H "Content-Type: application/json"  -H "Authorization: Bearer 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" -d '{
  "model": "gpt-3.5-turbo",
  "messages": [
    {
      "role": "user",
      "content": "你好，你是谁？"
    }
  ]
}'

embedding response log:

Ⅴ. Special notes for reviews

[CLAassistant]

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[duxin40]

@CH3CHO 辛苦有时间帮忙review下～

[CH3CHO]

@CH3CHO 辛苦有时间帮忙review下～

好的。预计今天能给出 review 意见。另外麻烦先签署一下 CLA。谢谢！

[CH3CHO]

LGTM. Thanks.