Logger plugins
For details on how osqueryd schedules queries and loads information from a config, see the configuration deployment guide.
If you would like to use services like scribe or flume, you need to write a C++ function that consumes/handles a string argument.
Example: glog logger
This following is a overly simplified logger plugin that writes results to a glog info line.
#include <osquery/logger.h>
#include <glog/logging.h>
namespace osquery {
class GlogLoggerPlugin : public LoggerPlugin {
public:
Status logString(const std::string& message) {
LOG(INFO) << message;
return Status(0, "OK");
}
virtual ~GlogLoggerPlugin() {}
};
REGISTER(GlogLoggerPlugin, "logger", "glog");
}
Essentially, you are just implementing a logString method. When the daemon identifies a change to a query schedule it will call the active logger plugin's logString method after converting the change details into JSON.
Using the plugin
Add your source file to osquery/plugins/logger/CMakeLists.txt
and it will be compiled and linked.
Now when starting osqueryd you may use --logger_plugin=name
where the name is the string identifier used in REGISTER.