Add LOG_NOTICE level logging for application lifecycle events

src/shrpx.cc

@@ -190,9 +190,7 @@ evconnlistener* create_evlistener(ListenHandler *handler, int family)
       // Otherwise, close fd, and create server socket as usual.
 
       if(port == get_config()->port) {
-        if(LOG_ENABLED(INFO)) {
-          LOG(INFO) << "Listening on port " << get_config()->port;
-        }
+        LOG(NOTICE) << "Listening on port " << get_config()->port;
 
         return new_evlistener(handler, fd);
       }
@@ -279,9 +277,7 @@ evconnlistener* create_evlistener(ListenHandler *handler, int family)
     return nullptr;
   }
 
-  if(LOG_ENABLED(INFO)) {
-    LOG(INFO) << "Listening on " << host << ", port " << get_config()->port;
-  }
+  LOG(NOTICE) << "Listening on " << host << ", port " << get_config()->port;
 
   return new_evlistener(handler, fd);
 }
@@ -356,9 +352,7 @@ void exec_binary_signal_cb(evutil_socket_t sig, short events, void *arg)
 {
   auto listener_handler = static_cast<ListenHandler*>(arg);
 
-  if(LOG_ENABLED(INFO)) {
-    LOG(INFO) << "Executing new binary";
-  }
+  LOG(NOTICE) << "Executing new binary";
 
   auto pid = fork();
 
@@ -449,9 +443,7 @@ void graceful_shutdown_signal_cb(evutil_socket_t sig, short events, void *arg)
 {
   auto listener_handler = static_cast<ListenHandler*>(arg);
 
-  if(LOG_ENABLED(INFO)) {
-    LOG(INFO) << "Graceful shutdown signal received";
-  }
+  LOG(NOTICE) << "Graceful shutdown signal received";
 
   worker_config->graceful_shutdown = true;
 
@@ -1132,8 +1124,8 @@ Mode:
 Logging:
   -L, --log-level=<LEVEL>
                      Set the  severity level  of log  output.  <LEVEL>
-                     must be one of INFO, WARNING, ERROR and FATAL.
-                     Default: WARNING
+                     must be one of INFO, NOTICE, WARNING, ERROR and FATAL.
+                     Default: NOTICE
   --accesslog-file=<PATH>
                      Set path  to write  access log.  To  reopen file,
                      send USR1 signal to nghttpx.
@@ -1216,7 +1208,7 @@ Misc:
 
 int main(int argc, char **argv)
 {
-  Log::set_severity_level(WARNING);
+  Log::set_severity_level(NOTICE);
   create_config();
   fill_default_config();
 
@@ -1887,9 +1879,7 @@ int main(int argc, char **argv)
 
   event_loop();
 
-  if(LOG_ENABLED(INFO)) {
-    LOG(INFO) << "Shutdown momentarily";
-  }
+  LOG(NOTICE) << "Shutdown momentarily";
 
   return 0;
 }

src/shrpx_log.cc

@@ -45,20 +45,21 @@ namespace shrpx {
 
 namespace {
 const char *SEVERITY_STR[] = {
-  "INFO", "WARN", "ERROR", "FATAL"
+  "INFO", "NOTICE", "WARN", "ERROR", "FATAL"
 };
 } // namespace
 
 namespace {
 const char *SEVERITY_COLOR[] = {
   "\033[1;32m", // INFO
+  "\033[1;36m", // NOTICE
   "\033[1;33m", // WARN
   "\033[1;31m", // ERROR
   "\033[1;35m", // FATAL
 };
 } // namespace
 
-int Log::severity_thres_ = WARNING;
+int Log::severity_thres_ = NOTICE;
 
 void Log::set_severity_level(int severity)
 {
@@ -81,6 +82,8 @@ int severity_to_syslog_level(int severity)
   switch(severity) {
   case(INFO):
     return LOG_INFO;
+  case(NOTICE):
+    return LOG_NOTICE;
   case(WARNING):
     return LOG_WARNING;
   case(ERROR):
@@ -110,9 +113,14 @@ Log::~Log()
   }
 
   if(get_config()->errorlog_syslog) {
+    if (severity_ == NOTICE) {
+      syslog(severity_to_syslog_level(severity_), "[%s] %s",
+             SEVERITY_STR[severity_], stream_.str().c_str());
+    } else {
       syslog(severity_to_syslog_level(severity_), "[%s] %s (%s:%d)",
              SEVERITY_STR[severity_], stream_.str().c_str(),
              filename_, linenum_);
+    }
 
     return;
   }
@@ -122,6 +130,16 @@ Log::~Log()
 
   auto cached_time = get_config()->cached_time;
 
+  if (severity_ == NOTICE) {
+    rv = snprintf(buf, sizeof(buf),
+                  "%s PID%d [%s%s%s] %s\n",
+                  cached_time->c_str(),
+                  getpid(),
+                  tty ? SEVERITY_COLOR[severity_] : "",
+                  SEVERITY_STR[severity_],
+                  tty ? "\033[0m" : "",
+                  stream_.str().c_str());
+  } else {
     rv = snprintf(buf, sizeof(buf),
                   "%s PID%d [%s%s%s] %s%s:%d%s %s\n",
                   cached_time->c_str(),
@@ -133,6 +151,7 @@ Log::~Log()
                   filename_, linenum_,
                   tty ? "\033[0m" : "",
                   stream_.str().c_str());
+  }
 
   if(rv < 0) {
     return;

src/shrpx_log.h

@@ -71,7 +71,7 @@ class Downstream;
   (Log(SEVERITY, __FILE__, __LINE__) << "[DHTTP2:" << HTTP2 << "] ")
 
 enum SeverityLevel {
-  INFO, WARNING, ERROR, FATAL
+  INFO, NOTICE, WARNING, ERROR, FATAL
 };
 
 class Log {

src/shrpx_ssl.cc

@@ -943,8 +943,10 @@ bool check_http2_requirement(SSL *ssl)
   case TLS1_2_VERSION:
     break;
   default:
+    if(LOG_ENABLED(INFO)) {
       LOG(INFO) << "TLSv1.2 was not negotiated. "
                 << "HTTP/2 must not be negotiated.";
+    }
     return false;
   }
 

src/shrpx_thread_event_receiver.cc

@@ -84,9 +84,7 @@ void ThreadEventReceiver::on_read(bufferevent *bev)
     }
 
     if(wev.type == GRACEFUL_SHUTDOWN) {
-      if(LOG_ENABLED(INFO)) {
-        LOG(INFO) << "Graceful shutdown commencing";
-      }
+      LOG(NOTICE) << "Graceful shutdown commencing";
 
       worker_config->graceful_shutdown = true;