[cloudflare] Add health check to mock service (#11313)

Adds a health check to the mock service used in the `logpull` system
test. This will let docker check when the mock service is ready and
avoid starting the test too early.

The system test `interval` setting is lowered from `1h` to `2m`, which
may also help avoid test failures.

packages/cloudflare/_dev/deploy/docker/docker-compose.yml

@@ -19,4 +19,8 @@ services:
       - ./logpull-mock-service:/app
     ports:
       - "3000:3000"
+    healthcheck:
+      test: "wget --no-verbose --tries=1 --spider http://localhost:3000/health || exit 1"
+      interval: 10s
+      timeout: 5s
     command: ["go", "run", "main.go"]

packages/cloudflare/_dev/deploy/docker/logpull-mock-service/main.go

@@ -33,6 +33,7 @@ var (
 // Ref: https://developers.cloudflare.com/logs/logpull/requesting-logs/
 func main() {
 	router := mux.NewRouter()
+	router.Path("/health").HandlerFunc(healthHandler).Methods("GET").Schemes("http")
 	router.Path("/client/v4/zones/aaabbbccc/logs/received").HandlerFunc(logpullHandler).Methods("GET").Schemes("http")
 
 	port := 3000
@@ -41,6 +42,10 @@ func main() {
 	http.ListenAndServe(fmt.Sprintf(":%d", port), h)
 }
 
+func healthHandler(w http.ResponseWriter, r *http.Request) {
+	fmt.Fprint(w, "OK")
+}
+
 func logpullHandler(w http.ResponseWriter, r *http.Request) {
 	// Set response headers to indicate rolling response
 	w.Header().Set("Content-Type", "text/event-stream")

packages/cloudflare/data_stream/logpull/_dev/test/system/test-default-config.yml

@@ -7,7 +7,7 @@ vars:
   enable_request_tracer: true
 data_stream:
   vars:
-    interval: 1h
+    interval: 2m
     preserve_original_event: true
     auth_email: [email protected]
     auth_key: xxxxxxxxxx