mirror of
https://git.rwth-aachen.de/acs/public/villas/node/
synced 2025-03-09 00:00:00 +01:00
121 lines
3.4 KiB
C++
121 lines
3.4 KiB
C++
/* The "restart" API request.
|
|
*
|
|
* Author: Steffen Vogel <post@steffenvogel.de>
|
|
* SPDX-FileCopyrightText: 2014-2023 Institute for Automation of Complex Power Systems, RWTH Aachen University
|
|
* SPDX-License-Identifier: Apache-2.0
|
|
*/
|
|
|
|
#include <villas/api/request.hpp>
|
|
#include <villas/api/response.hpp>
|
|
#include <villas/api/session.hpp>
|
|
#include <villas/log.hpp>
|
|
#include <villas/node/exceptions.hpp>
|
|
#include <villas/super_node.hpp>
|
|
#include <villas/utils.hpp>
|
|
|
|
namespace villas {
|
|
namespace node {
|
|
namespace api {
|
|
|
|
class RestartRequest : public Request {
|
|
|
|
protected:
|
|
static std::string configUri;
|
|
|
|
static void handler() {
|
|
int ret;
|
|
const char *cfg = !configUri.empty() ? configUri.c_str() : nullptr;
|
|
|
|
const char *argv[] = {"villas-node", cfg, nullptr};
|
|
|
|
Logger logger = Log::get("api:restart");
|
|
|
|
if (cfg)
|
|
logger->info("Restarting instance: config={}", cfg);
|
|
else
|
|
logger->info("Restarting instance");
|
|
|
|
ret = execvp("/proc/self/exe", (char **)argv);
|
|
if (ret)
|
|
throw SystemError("Failed to restart");
|
|
}
|
|
|
|
public:
|
|
using Request::Request;
|
|
|
|
virtual Response *execute() {
|
|
int ret;
|
|
json_error_t err;
|
|
|
|
if (method != Session::Method::POST)
|
|
throw InvalidMethod(this);
|
|
|
|
json_t *json_config = nullptr;
|
|
|
|
if (body) {
|
|
ret = json_unpack_ex(body, &err, 0, "{ s?: o }", "config", &json_config);
|
|
if (ret < 0)
|
|
throw BadRequest("Failed to parse request body");
|
|
}
|
|
|
|
if (json_config) {
|
|
if (json_is_string(json_config))
|
|
configUri = json_string_value(json_config);
|
|
else if (json_is_object(json_config)) {
|
|
char configUriBuf[] = "villas-node.json.XXXXXX";
|
|
int configFd = mkstemp(configUriBuf);
|
|
|
|
FILE *configFile = fdopen(configFd, "w+");
|
|
|
|
ret = json_dumpf(json_config, configFile, JSON_INDENT(4));
|
|
if (ret < 0)
|
|
throw Error(HTTP_STATUS_INTERNAL_SERVER_ERROR,
|
|
"Failed to create temporary config file");
|
|
|
|
fclose(configFile);
|
|
configUri = configUriBuf;
|
|
} else if (json_config != nullptr)
|
|
throw BadRequest("Parameter 'config' must be either a URL (string) or "
|
|
"a configuration (object)");
|
|
} else // If no config is provided via request, we will use the previous one
|
|
configUri = session->getSuperNode()->getConfigPath();
|
|
|
|
logger->info("Restarting to {}", configUri);
|
|
|
|
// Increment API restart counter
|
|
char *scnt = getenv("VILLAS_API_RESTART_COUNT");
|
|
int cnt = scnt ? atoi(scnt) : 0;
|
|
char buf[32];
|
|
snprintf(buf, sizeof(buf), "%d", cnt + 1);
|
|
|
|
// We pass some env variables to the new process
|
|
setenv("VILLAS_API_RESTART_COUNT", buf, 1);
|
|
|
|
auto *json_response = json_pack(
|
|
"{ s: i, s: o }", "restarts", cnt, "config",
|
|
configUri.empty() ? json_null() : json_string(configUri.c_str()));
|
|
|
|
// Register exit handler
|
|
ret = atexit(handler);
|
|
if (ret)
|
|
throw Error(HTTP_STATUS_INTERNAL_SERVER_ERROR,
|
|
"Failed to restart VILLASnode instance");
|
|
|
|
// Properly terminate current instance
|
|
utils::killme(SIGTERM);
|
|
|
|
return new JsonResponse(session, HTTP_STATUS_OK, json_response);
|
|
}
|
|
};
|
|
|
|
std::string RestartRequest::configUri;
|
|
|
|
// Register API request
|
|
static char n[] = "restart";
|
|
static char r[] = "/restart";
|
|
static char d[] = "Restart VILLASnode with new configuration";
|
|
static RequestPlugin<RestartRequest, n, r, d> p;
|
|
|
|
} // namespace api
|
|
} // namespace node
|
|
} // namespace villas
|