TSG-23842 请tfe提供健康状态查询的HTTP服务

common/CMakeLists.txt

@@ -5,7 +5,7 @@
         src/tap.cpp src/io_uring.cpp src/intercept_policy.cpp src/tfe_fieldstat.cpp
         src/tuple.cpp src/tfe_packet_io.cpp src/tfe_session_table.cpp 
         src/tfe_ctrl_packet.cpp src/packet.cpp src/tfe_packet_io_fs.cpp
-        src/mpack.cpp src/dablooms.cpp src/murmur.cpp src/timestamp.cpp)
+        src/mpack.cpp src/dablooms.cpp src/murmur.cpp src/timestamp.cpp src/http_healthcheck.cpp)
 target_include_directories(common PUBLIC ${CMAKE_CURRENT_LIST_DIR}/include)
 target_include_directories(common PUBLIC ${CMAKE_CURRENT_LIST_DIR}/../bpf/)
 target_include_directories(common PRIVATE ${CMAKE_CURRENT_LIST_DIR}/../platform/include/internal)

common/include/http_healthcheck.h

@@ -0,0 +1,24 @@
+#ifndef _HTTP_HEALTHCHECK_H
+#define _HTTP_HEALTHCHECK_H
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+/*
+ * [http_healthcheck_server]
+ * enable=1
+ * port=8080
+ * addr="0.0.0.0"
+ * path="/status"
+ */
+
+void http_healthcheck_server_start(const char *profile);
+void http_healthcheck_server_stop();
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif

common/src/http_healthcheck.cpp

@@ -0,0 +1,66 @@
+#include <string.h>
+#include <limits.h>
+#include <pthread.h>
+
+#include "event2/event.h"
+#include "event2/buffer.h"
+#include "event2/http.h"
+#include "http_healthcheck.h"
+#include <MESA/MESA_prof_load.h>
+
+struct http_status_ctx
+{
+	pthread_t pthread;
+	struct event_base *base;
+
+	unsigned int enable;
+	unsigned int port;
+	char addr[PATH_MAX];
+	char path[PATH_MAX];
+	uint64_t is_error;
+} g_ctx = {0};
+
+static void http_callback(struct evhttp_request *req, void *arg)
+{
+	evhttp_send_reply(req, HTTP_OK, "", NULL);
+}
+
+static void *http_healthcheck_thread(void *arg)
+{
+	printf("http_healthcheck_thread running (%s:%d/%s)\n", g_ctx.addr, g_ctx.port, g_ctx.path);
+
+	g_ctx.base = event_base_new();
+	struct evhttp *http = evhttp_new(g_ctx.base);
+	evhttp_set_cb(http, g_ctx.path, http_callback, NULL);
+	evhttp_bind_socket(http, g_ctx.addr, g_ctx.port);
+	event_base_dispatch(g_ctx.base);
+	evhttp_free(http);
+	event_base_free(g_ctx.base);
+
+	printf("http_healthcheck_thread exit\n");
+	return NULL;
+}
+
+void http_healthcheck_server_start(const char *profile)
+{
+	MESA_load_profile_uint_def(profile, "http_healthcheck_server", "enable", &g_ctx.enable, 0);
+	MESA_load_profile_uint_def(profile, "http_healthcheck_server", "port", &g_ctx.port, 8080);
+	MESA_load_profile_string_def(profile, "http_healthcheck_server", "addr", g_ctx.addr, sizeof(g_ctx.addr), "127.0.0.1");
+	MESA_load_profile_string_def(profile, "http_healthcheck_server", "path", g_ctx.path, sizeof(g_ctx.path), "/status");
+
+	if (!g_ctx.enable)
+	{
+		return;
+	}
+
+	pthread_create(&g_ctx.pthread, NULL, http_healthcheck_thread, (void *)&g_ctx);
+}
+
+void http_healthcheck_server_stop()
+{
+	if (g_ctx.enable)
+	{
+		event_base_loopbreak(g_ctx.base);
+		pthread_join(g_ctx.pthread, NULL);
+	}
+}

conf/tfe/tfe.conf

@@ -266,3 +266,9 @@ buff_size=2048
 # IORING_SETUP_SUBMIT_ALL	(1U << 7)	/* continue submit on error */
 flags=0
 sq_thread_idle=0
+
+[http_healthcheck_server]
+enable=1
+port=8080
+addr="0.0.0.0"
+path="/status"

platform/src/proxy.cpp

@@ -54,6 +54,7 @@
 #include <key_keeper.h>
 #include <watchdog_3rd_device.h>
 #include <timestamp.h>
+#include <http_healthcheck.h>
 
 /* Breakpad */
 #include <MESA/breakpad_mini.h>
@@ -717,6 +718,8 @@ int main(int argc, char * argv[])
 
 	TFE_LOG_ERROR(g_default_logger, "Tango Frontend Engine initialized, Version: %s.", __tfe_version);
 
+	http_healthcheck_server_start(main_profile);
+
 	/* If TFE is run by systemd's notify, then tell the systemd our tfe is ready.
 	 * and disable the stderr log, only print logs into files */
 	if(check_is_started_by_notify())
@@ -729,6 +732,9 @@ int main(int argc, char * argv[])
 	worker_thread_ready = 1;
 
 	event_base_dispatch(g_default_proxy->evbase);
+
+	http_healthcheck_server_stop();
+	
 	return 0;
 }