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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#include "cf-handler.h"
#include <vespa/config/common/configsystem.h>
#include <vespa/config/common/exceptions.h>
#include <vespa/config/subscription/configsubscriber.hpp>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <vespa/log/log.h>
LOG_SETUP(".cf-handler");
CfHandler::CfHandler() = default;
CfHandler::~CfHandler() = default;
void CfHandler::subscribe(const std::string & configId, std::chrono::milliseconds timeout) {
_handle = _subscriber.subscribe<LogforwarderConfig>(configId, timeout);
}
namespace {
bool isExecutable(const char *path) {
struct stat statbuf;
if (stat(path, &statbuf) != 0) {
return false;
}
if (! S_ISREG(statbuf.st_mode)) {
return false;
}
return ((statbuf.st_mode & S_IXOTH) != 0);
}
time_t lastModTime(const vespalib::string &fn) {
if (fn.empty()) return 0;
struct stat info;
if (stat(fn.c_str(), &info) != 0) return 0;
return info.st_mtime;
}
} // namespace
void CfHandler::doConfigure() {
_lastConfig = _handle->getConfig();
const LogforwarderConfig& config(*_lastConfig);
LOG(debug, "validating splunk home '%s'", config.splunkHome.c_str());
auto program = config.splunkHome + "/bin/splunk";
if (isExecutable(program.c_str())) {
gotConfig(config);
} else {
LOG(warning, "invalid splunk home, '%s' is not an executable", program.c_str());
}
}
vespalib::string CfHandler::clientCertFile() const {
static const vespalib::string certDir = "/var/lib/sia/certs/";
if (_lastConfig && !_lastConfig->role.empty()) {
return certDir + _lastConfig->role + ".cert.pem";
}
return "";
}
vespalib::string CfHandler::clientKeyFile() const {
static const vespalib::string certDir = "/var/lib/sia/keys/";
if (_lastConfig && !_lastConfig->role.empty()) {
return certDir + _lastConfig->role + ".key.pem";
}
return "";
}
bool CfHandler::certFileChanged() {
time_t modTime = lastModTime(clientCertFile());
if (modTime != _lastCertFileChange) {
_lastCertFileChange = modTime;
return true;
}
return false;
}
void
CfHandler::check()
{
if (_subscriber.nextConfigNow() || certFileChanged()) {
doConfigure();
}
}
constexpr std::chrono::milliseconds CONFIG_TIMEOUT_MS(30 * 1000);
void
CfHandler::start(const char *configId)
{
LOG(debug, "Reading configuration with id '%s'", configId);
try {
subscribe(configId, CONFIG_TIMEOUT_MS);
} catch (config::ConfigTimeoutException & ex) {
LOG(warning, "Timout getting config, please check your setup. Will exit and restart: %s", ex.getMessage().c_str());
std::_Exit(EXIT_FAILURE);
} catch (config::InvalidConfigException& ex) {
LOG(error, "Fatal: Invalid configuration, please check your setup: %s", ex.getMessage().c_str());
std::_Exit(EXIT_FAILURE);
} catch (config::ConfigRuntimeException& ex) {
LOG(error, "Fatal: Could not get config, please check your setup: %s", ex.getMessage().c_str());
std::_Exit(EXIT_FAILURE);
}
}
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