I am a bit stuck to implement a very simple scenario with boost log. I need to limit the size of entire rotation log.
void setup_logging( channel_settings_t const& settings
, std::string const& log_file
, std::string const& log_level
)
{
config_logger_attributes(logging::core::get(), settings, log_level);
using namespace logging::aux::default_attribute_names;
//add logging to file (which implicitly deletes the default console logger)
logging::add_file_log
(
keywords::auto_flush = true,
keywords::open_mode = std::ios::out | std::ios::app,
keywords::file_name = log_file+"_%N.log",
keywords::rotation_size = 50 * 1024, // Just for test limit to 50K
keywords::format = //"%TimeStamp%: [%Channel%] |ThreadId| <%Severity%> %Message%"
expr::format("%1% : [%2%] |%3%| <%4%> %5%")
% expr::attr< boost::posix_time::ptime >(timestamp())
% expr::attr<std::string>(channel())
% expr::attr<attrs::current_thread_id::value_type>(thread_id())
% trivial::severity
% expr::smessage
)->locked_backend()->set_file_collector
( sinks::file::make_collector
( keywords::target = "logs"
, keywords::max_size = 200 * 1024 // just for test limit to 200K
)
)
;
}
Unfortunately, I can't find what the target keyword means, despite the fact that it is a target directory. Target directory relating to smth or should there be a full path? Should this target directory exist? I did a test and rotating log files just grow upon the 200K limit.
I just want to have let's say 3 or 4 last rotated log files, the rest should be removed? We already ran into the situation, where the logger used all disc space and the server crashed :(