SERVER-4905: add flag to disable mongo's builtin log rotation

To support the standalone utility, we need to give administrators
support for disabling Mongo's builtin log rotation.

1 files changed, 22 insertions, 0 deletions

diff --git a/src/mongo/db/server_options_helpers.cpp b/src/mongo/db/server_options_helpers.cpp
index 67bff90a0bc..62c4bc8b27f 100644
--- a/src/mongo/db/server_options_helpers.cpp
+++ b/src/mongo/db/server_options_helpers.cpp
@@ -198,6 +198,9 @@ namespace {
         options->addOptionChaining("systemLog.logAppend", "logappend", moe::Switch,
                 "append to logpath instead of over-writing");
 
+        options->addOptionChaining("systemLog.logRotate", "logRotate", moe::String,
+                "set the log rotation behavior (rename|reopen)");
+
         options->addOptionChaining("systemLog.timeStampFormat", "timeStampFormat", moe::String,
                 "Desired format for timestamps in log messages. One of ctime, "
                 "iso8601-utc or iso8601-local");
@@ -814,6 +817,25 @@ namespace {
             serverGlobalParams.logAppend = true;
         }
 
+        if (params.count("systemLog.logRotate")) {
+            std::string logRotateParam = params["systemLog.logRotate"].as<string>();
+            if (logRotateParam == "reopen") {
+                serverGlobalParams.logRenameOnRotate = false;
+
+                if(serverGlobalParams.logAppend == false) {
+                    return Status(ErrorCodes::BadValue,
+                                  "logAppend must equal true if logRotate is set to reopen" );
+                }
+            }
+            else if (logRotateParam == "rename") {
+                serverGlobalParams.logRenameOnRotate = true;
+            }
+            else {
+                return Status(ErrorCodes::BadValue,
+                              "unsupported value for logRotate " + logRotateParam );
+            }
+        }
+
         if (!serverGlobalParams.logpath.empty() && serverGlobalParams.logWithSyslog) {
             return Status(ErrorCodes::BadValue, "Cant use both a logpath and syslog ");
         }