feat: add config for log cleaner

kvrocks.conf

@@ -96,6 +96,15 @@ dir /tmp/kvrocks
 # We also can send logs to stdout/stderr is as simple as:
 #
 log-dir stdout
+# log-dir log
+
+# To enable the log cleaner. if set yes , glog will check if there are
+# overdue logs whenever a flush is performed
+enablelogcleaner yes
+
+# INFO level log file whose last modified time is greater than logcleanerday
+# will be unlinked
+logcleanerday 0
 
 # When running in daemonize mode, kvrocks writes a PID file in ${CONFIG_DIR}/kvrocks.pid by
 # default. You can specify a custom pid file location here.

src/config/config.cc

@@ -159,6 +159,8 @@ Config::Config() {
       {"migrate-sequence-gap", false, new IntField(&sequence_gap, 10000, 1, INT_MAX)},
       {"unixsocket", true, new StringField(&unixsocket, "")},
       {"unixsocketperm", true, new OctalField(&unixsocketperm, 0777, 1, INT_MAX)},
+      {"enablelogcleaner", false, new YesNoField(&enablelogcleaner, false)},
+      {"logcleanerday", false, new IntField(&logcleanerday, 365, 0, INT_MAX)},
 
       /* rocksdb options */
       {"rocksdb.compression", false, new EnumField(&RocksDB.compression, compression_type_enum, 0)},

src/config/config.h

@@ -139,6 +139,8 @@ struct Config {
   int pipeline_size;
   int sequence_gap;
 
+  bool enablelogcleaner;
+  int logcleanerday;
   // profiling
   int profiling_sample_ratio = 0;
   int profiling_sample_record_threshold_ms = 0;

src/main.cc

@@ -178,6 +178,15 @@ static void initGoogleLog(const Config *config) {
     FLAGS_logtostdout = true;
   } else {
     FLAGS_log_dir = config->log_dir;
+    if (config->enablelogcleaner) {
+      google::EnableLogCleaner(config->logcleanerday);
+      google::SetLogFilenameExtension(".log");
+      for (int level = google::INFO; level <= google::FATAL; level++) {
+        std::string des = google::LogSeverityNames[level];
+        des = config->log_dir + "/kvrocks_" + des + "_";
+        google::SetLogDestination(level, des.c_str());
+      }
+    }
   }
 }