enforce log retention policies

* for access logs, save meta-data about the log file itself
  in a simple format.
* implement a proof-of-concept shell script that removes
  log files after one month.
* ensure retention enforcer is started when services start
* note that retention enforcer will continue running even
  after services stop, but it has protection to ensure that
  it won't multiply endlessly.

1 files changed, 5 insertions, 1 deletions

diff --git a/container-accesslogging/src/main/java/com/yahoo/container/logging/LogFileHandler.java b/container-accesslogging/src/main/java/com/yahoo/container/logging/LogFileHandler.java
index c7e2a777695..d729b092670 100644
--- a/container-accesslogging/src/main/java/com/yahoo/container/logging/LogFileHandler.java
+++ b/container-accesslogging/src/main/java/com/yahoo/container/logging/LogFileHandler.java
@@ -2,6 +2,7 @@
 package com.yahoo.container.logging;
 
 import com.yahoo.container.core.AccessLogConfig;
+import com.yahoo.log.LogFileDb;
 
 import java.io.File;
 import java.io.FileOutputStream;
@@ -250,6 +251,7 @@ public class LogFileHandler extends StreamHandler {
             FileOutputStream os = new FileOutputStream(fileName, true); // append mode, for safety
             super.setOutputStream(os);
             currentOutputStream = os;
+            if (! useSequenceNameScheme) LogFileDb.nowLoggingTo(fileName);
         }
         catch (IOException e) {
             throw new RuntimeException("Couldn't open log file '" + fileName + "'", e);
@@ -310,7 +312,9 @@ public class LogFileHandler extends StreamHandler {
             if (thisN>largestN)
                 largestN=thisN;
         }
-        file.renameTo(new File(dir,file.getName() + "." + (largestN + 1)));
+        File newFn = new File(dir, file.getName() + "." + (largestN + 1));
+        LogFileDb.nowLoggingTo(newFn.getAbsolutePath());
+        file.renameTo(newFn);
     }
 
     /**