feat(ai): improve analytics report

changelog/unreleased/kong/add-ai-data-report.yml

@@ -0,0 +1,3 @@
+"message": Add `events:ai:response_tokens`, `events:ai:prompt_tokens` and `events:ai:requests` to the anonymous report to start counting AI usage
+"type": feature
+"scope": Core

kong/init.lua

@@ -233,6 +233,9 @@ do
     "events:streams",
     "events:streams:tcp",
     "events:streams:tls",
+    "events:ai:response_tokens",
+    "events:ai:prompt_tokens",
+    "events:ai:requests",
   }
 
   reset_kong_shm = function(config)

kong/reports.lua

@@ -53,6 +53,11 @@ local GO_PLUGINS_REQUEST_COUNT_KEY = "events:requests:go_plugins"
 local WASM_REQUEST_COUNT_KEY = "events:requests:wasm"
 
 
+local AI_RESPONSE_TOKENS_COUNT_KEY = "events:ai:response_tokens"
+local AI_PROMPT_TOKENS_COUNT_KEY   = "events:ai:prompt_tokens"
+local AI_REQUEST_COUNT_KEY         = "events:ai:requests"
+
+
 local ROUTE_CACHE_HITS_KEY = "route_cache_hits"
 local STEAM_ROUTE_CACHE_HITS_KEY_POS = STREAM_COUNT_KEY .. ":" .. ROUTE_CACHE_HITS_KEY .. ":pos"
 local STEAM_ROUTE_CACHE_HITS_KEY_NEG = STREAM_COUNT_KEY .. ":" .. ROUTE_CACHE_HITS_KEY .. ":neg"
@@ -240,8 +245,12 @@ local function reset_counter(key, amount)
 end
 
 
-local function incr_counter(key)
-  local ok, err = report_counter:incr(key, 1)
+local function incr_counter(key, hit)
+  if not hit then 
+    hit = 1
+  end
+
+  local ok, err = report_counter:incr(key, hit)
   if not ok then
     log(WARN, "could not increment ", key, " in 'kong' shm: ", err)
   end
@@ -327,6 +336,10 @@ local function send_ping(host, port)
     _ping_infos.stream_route_cache_hit_pos = get_counter(STEAM_ROUTE_CACHE_HITS_KEY_POS)
     _ping_infos.stream_route_cache_hit_neg = get_counter(STEAM_ROUTE_CACHE_HITS_KEY_NEG)
 
+    _ping_infos.ai_response_tokens = get_counter(AI_RESPONSE_TOKENS_COUNT_KEY)
+    _ping_infos.ai_prompt_tokens   = get_counter(AI_PROMPT_TOKENS_COUNT_KEY)
+    _ping_infos.ai_reqs            = get_counter(AI_REQUEST_COUNT_KEY)
+
     send_report("ping", _ping_infos, host, port)
 
     reset_counter(STREAM_COUNT_KEY, _ping_infos.streams)
@@ -337,6 +350,9 @@ local function send_ping(host, port)
     reset_counter(WASM_REQUEST_COUNT_KEY, _ping_infos.wasm_reqs)
     reset_counter(STEAM_ROUTE_CACHE_HITS_KEY_POS, _ping_infos.stream_route_cache_hit_pos)
     reset_counter(STEAM_ROUTE_CACHE_HITS_KEY_NEG, _ping_infos.stream_route_cache_hit_neg)
+    reset_counter(AI_RESPONSE_TOKENS_COUNT_KEY, _ping_infos.ai_response_tokens)
+    reset_counter(AI_PROMPT_TOKENS_COUNT_KEY, _ping_infos.ai_prompt_tokens)
+    reset_counter(AI_REQUEST_COUNT_KEY, _ping_infos.ai_reqs)
     return
   end
 
@@ -353,6 +369,10 @@ local function send_ping(host, port)
   _ping_infos.go_plugin_reqs = get_counter(GO_PLUGINS_REQUEST_COUNT_KEY)
   _ping_infos.wasm_reqs      = get_counter(WASM_REQUEST_COUNT_KEY)
 
+  _ping_infos.ai_response_tokens = get_counter(AI_RESPONSE_TOKENS_COUNT_KEY)
+  _ping_infos.ai_prompt_tokens   = get_counter(AI_PROMPT_TOKENS_COUNT_KEY)
+  _ping_infos.ai_reqs            = get_counter(AI_REQUEST_COUNT_KEY)
+
   _ping_infos.request_route_cache_hit_pos = get_counter(REQUEST_ROUTE_CACHE_HITS_KEY_POS)
   _ping_infos.request_route_cache_hit_neg = get_counter(REQUEST_ROUTE_CACHE_HITS_KEY_NEG)
 
@@ -372,6 +392,9 @@ local function send_ping(host, port)
   reset_counter(WASM_REQUEST_COUNT_KEY,  _ping_infos.wasm_reqs)
   reset_counter(REQUEST_ROUTE_CACHE_HITS_KEY_POS, _ping_infos.request_route_cache_hit_pos)
   reset_counter(REQUEST_ROUTE_CACHE_HITS_KEY_NEG, _ping_infos.request_route_cache_hit_neg)
+  reset_counter(AI_RESPONSE_TOKENS_COUNT_KEY, _ping_infos.ai_response_tokens)
+  reset_counter(AI_PROMPT_TOKENS_COUNT_KEY, _ping_infos.ai_prompt_tokens)
+  reset_counter(AI_REQUEST_COUNT_KEY, _ping_infos.ai_reqs)
 end
 
 
@@ -496,6 +519,15 @@ return {
       incr_counter(WASM_REQUEST_COUNT_KEY)
     end
 
+    if kong.ctx.shared.ai_prompt_tokens then
+      incr_counter(AI_REQUEST_COUNT_KEY)
+      incr_counter(AI_PROMPT_TOKENS_COUNT_KEY, kong.ctx.shared.ai_prompt_tokens)
+    end
+
+    if kong.ctx.shared.ai_response_tokens then
+      incr_counter(AI_RESPONSE_TOKENS_COUNT_KEY, kong.ctx.shared.ai_response_tokens)
+    end
+
     local suffix = get_current_suffix(ctx)
     if suffix then
       incr_counter(count_key .. ":" .. suffix)

spec/02-integration/22-ai_plugins/01-reports_spec.lua

@@ -0,0 +1,239 @@
+local helpers = require "spec.helpers"
+local constants = require "kong.constants"
+local cjson = require "cjson"
+local pl_file = require "pl.file"
+
+local PLUGIN_NAME = "ai-proxy"
+local MOCK_PORT = helpers.get_available_port()
+
+for _, strategy in helpers.each_strategy() do
+  local admin_client
+  local dns_hostsfile
+  local reports_server
+
+  describe("anonymous reports for ai plugins #" .. strategy, function()
+    local reports_send_ping = function(port)
+      assert.eventually(function()
+        admin_client = helpers.admin_client()
+        local res = admin_client:post("/reports/send-ping" .. (port and "?port=" .. port or ""))
+        assert.response(res).has_status(200)
+        admin_client:close()
+      end)
+      .has_no_error("ping request was sent successfully")
+    end
+
+    lazy_setup(function()
+      dns_hostsfile = assert(os.tmpname() .. ".hosts")
+      local fd = assert(io.open(dns_hostsfile, "w"))
+      assert(fd:write("127.0.0.1 " .. constants.REPORTS.ADDRESS))
+      assert(fd:close())
+
+      local bp = assert(helpers.get_db_utils(strategy, {
+        "services",
+        "routes",
+        "plugins",
+      }, { "reports-api" }))
+
+            -- set up openai mock fixtures
+            local fixtures = {
+              http_mock = {},
+            }
+
+            fixtures.http_mock.openai = [[
+              server {
+                  server_name openai;
+                  listen ]]..MOCK_PORT..[[;
+
+                  default_type 'application/json';
+
+
+                  location = "/llm/v1/chat/good" {
+                    content_by_lua_block {
+                      local pl_file = require "pl.file"
+                      local json = require("cjson.safe")
+
+                      ngx.req.read_body()
+                      local body, err = ngx.req.get_body_data()
+                      body, err = json.decode(body)
+
+                      local token = ngx.req.get_headers()["authorization"]
+                      local token_query = ngx.req.get_uri_args()["apikey"]
+
+                      if token == "Bearer openai-key" or token_query == "openai-key" or body.apikey == "openai-key" then
+                        ngx.req.read_body()
+                        local body, err = ngx.req.get_body_data()
+                        body, err = json.decode(body)
+
+                        if err or (body.messages == ngx.null) then
+                          ngx.status = 400
+                          ngx.print(pl_file.read("spec/fixtures/ai-proxy/openai/llm-v1-chat/responses/bad_request.json"))
+                        else
+                          ngx.status = 200
+                          ngx.print(pl_file.read("spec/fixtures/ai-proxy/openai/llm-v1-chat/responses/good.json"))
+                        end
+                      else
+                        ngx.status = 401
+                        ngx.print(pl_file.read("spec/fixtures/ai-proxy/openai/llm-v1-chat/responses/unauthorized.json"))
+                      end
+                    }
+                  }
+              }
+            ]]
+
+      local http_srv = assert(bp.services:insert {
+        name = "mock-service",
+        host = helpers.mock_upstream_host,
+        port = helpers.mock_upstream_port,
+      })
+
+      local chat_good = assert(bp.routes:insert {
+        service = http_srv,
+        protocols = { "http" },
+        hosts = { "http-service.test" }
+      })
+
+      local chat_good_2 = assert(bp.routes:insert {
+        service = http_srv,
+        protocols = { "http" },
+        hosts = { "http-service.test_2" }
+      })
+
+      bp.plugins:insert({
+        name = "reports-api",
+        config = {}
+      })
+
+      bp.plugins:insert {
+        name = PLUGIN_NAME,
+        route = { id = chat_good.id },
+        config = {
+          route_type = "llm/v1/chat",
+          logging = {
+            log_payloads = false,
+            log_statistics = true,
+          },
+          auth = {
+            header_name = "Authorization",
+            header_value = "Bearer openai-key",
+          },
+          model = {
+            name = "gpt-3.5-turbo",
+            provider = "openai",
+            options = {
+              max_tokens = 256,
+              temperature = 1.0,
+              upstream_url = "http://"..helpers.mock_upstream_host..":"..MOCK_PORT.."/llm/v1/chat/good"
+            },
+          },
+        },
+      }
+
+      bp.plugins:insert {
+        name = PLUGIN_NAME,
+        route = { id = chat_good_2.id },
+        config = {
+          route_type = "llm/v1/chat",
+          logging = {
+            log_payloads = false,
+            log_statistics = false, -- should work also for statistics disable
+          },
+          auth = {
+            header_name = "Authorization",
+            header_value = "Bearer openai-key",
+          },
+          model = {
+            name = "gpt-3.5-turbo",
+            provider = "openai",
+            options = {
+              max_tokens = 256,
+              temperature = 1.0,
+              upstream_url = "http://"..helpers.mock_upstream_host..":"..MOCK_PORT.."/llm/v1/chat/good"
+            },
+          },
+        },
+      }
+
+      assert(helpers.start_kong({
+        nginx_conf = "spec/fixtures/custom_nginx.template",
+        database = strategy,
+        dns_hostsfile = dns_hostsfile,
+        plugins = "bundled,reports-api",
+        anonymous_reports = true,
+      }, nil, nil, fixtures))
+
+    end)
+
+    lazy_teardown(function()
+      os.remove(dns_hostsfile)
+
+      helpers.stop_kong()
+    end)
+
+    before_each(function()
+      reports_server = helpers.tcp_server(constants.REPORTS.STATS_TLS_PORT, {tls=true})
+    end)
+
+    describe("check report has ai data", function()
+      it("logs correct data for report on a request triggering a ai plugin", function()
+        local proxy_client = assert(helpers.proxy_client())
+        local res = proxy_client:get("/", {
+          headers = { 
+            ["content-type"] = "application/json",
+            ["accept"] = "application/json",
+            ["host"]  = "http-service.test",
+          },
+          body = pl_file.read("spec/fixtures/ai-proxy/openai/llm-v1-chat/requests/good.json"),
+        })
+        assert.res_status(200, res)
+
+        reports_send_ping(constants.REPORTS.STATS_TLS_PORT)
+
+        proxy_client:close()
+
+        local _, reports_data = assert(reports_server:join())
+        reports_data = cjson.encode(reports_data)
+
+        assert.match("ai_response_tokens=8", reports_data)
+        assert.match("ai_prompt_tokens=10", reports_data)
+        assert.match("ai_reqs=1", reports_data)
+      end)
+
+      it("logs correct data for a different routes triggering a ai plugin", function()
+        local proxy_client = assert(helpers.proxy_client())
+        local res = proxy_client:get("/", {
+          headers = { 
+            ["content-type"] = "application/json",
+            ["accept"] = "application/json",
+            ["host"]  = "http-service.test",
+          },
+          body = pl_file.read("spec/fixtures/ai-proxy/openai/llm-v1-chat/requests/good.json"),
+        })
+        assert.res_status(200, res)
+
+        local proxy_client_2 = assert(helpers.proxy_client())
+        local res_2 = proxy_client_2:get("/", {
+          headers = { 
+            ["content-type"] = "application/json",
+            ["accept"] = "application/json",
+            ["host"]  = "http-service.test_2",
+          },
+          body = pl_file.read("spec/fixtures/ai-proxy/openai/llm-v1-chat/requests/good.json"),
+        })
+        assert.res_status(200, res_2)
+
+        reports_send_ping(constants.REPORTS.STATS_TLS_PORT)
+
+        proxy_client:close()
+        proxy_client_2:close()
+
+        local _, reports_data = assert(reports_server:join())
+        reports_data = cjson.encode(reports_data)
+
+        assert.match("ai_response_tokens=16", reports_data)
+        assert.match("ai_prompt_tokens=20", reports_data)
+        assert.match("ai_reqs=2", reports_data)
+      end)
+    end)
+
+  end)
+end