From cc792ddd57691bb54972c73b9c861c768fce8c34 Mon Sep 17 00:00:00 2001
From: Lauri Ojansivu <x@xet7.org>
Date: Thu, 22 Aug 2019 19:22:27 +0300
Subject: Snap: Delete old MongoDB log, and log to syslog instead, because
 syslog usually already has log rotation.

Thanks to xet7 !

Closes wekan/wekan-snap#92,
closes #1911
---
 snap-src/bin/mongodb-control | 28 ++++++++++++++++++++++++++--
 1 file changed, 26 insertions(+), 2 deletions(-)

(limited to 'snap-src/bin')

diff --git a/snap-src/bin/mongodb-control b/snap-src/bin/mongodb-control
index 28e58670..db01cffd 100755
--- a/snap-src/bin/mongodb-control
+++ b/snap-src/bin/mongodb-control
@@ -16,6 +16,24 @@ fi
 
 export LC_ALL=C
 
+# When starting MongoDB, if logfile exist, delete it, because now uses syslog instead of logfile,
+# because syslog usually already has log rotation.
+# https://github.com/wekan/wekan-snap/issues/92
+if test -f "$SNAP_COMMON/mongodb.log"; then
+   rm -f "$SNAP_COMMON/mongodb.log"
+fi
+
+# Alternative: When starting MongoDB, and using logfile, truncate log to last 1000 lines of text.
+# 1) If file exists:
+#if test -f "$SNAP_COMMON/mongodb.log"; then
+#    # 2) Copy last 1000 lines to variable loglast1000lines.
+#    loglast1000lines=$(tail -1000 "$SNAP_COMMON/mongodb.log")
+#    # 3) Copy variable to replace original MongoDB log.
+#    echo "$loglast1000lines" > "$SNAP_COMMON/mongodb.log"
+#    # 4) Set variable to be empty.
+#    loglast1000lines=""
+#fi
+
 if [ -z "$MONGO_URL" ]; then
 
     # start mongo deamon
@@ -31,11 +49,17 @@ if [ -z "$MONGO_URL" ]; then
     fi
     echo "mongodb bind options: $BIND_OPTIONS"
 
-    mongod --dbpath $SNAP_COMMON --logpath $SNAP_COMMON/mongodb.log --logappend --journal $BIND_OPTIONS --smallfiles
+    ## OLD: Logging to file.
+    #mongod --dbpath $SNAP_COMMON --logpath $SNAP_COMMON/mongodb.log --logappend --journal $BIND_OPTIONS --smallfiles
+    ## NEW: Logging to syslog, that usually has already log rotation.
+    mongod --dbpath $SNAP_COMMON --syslog --journal $BIND_OPTIONS --smallfiles
 
 else
 
-    mongod --dbpath $SNAP_COMMON --logpath $SNAP_COMMON/mongodb.log --logappend --journal $MONGO_URL --smallfiles
+    ## OLD: Logging to file.
+    #mongod --dbpath $SNAP_COMMON --logpath $SNAP_COMMON/mongodb.log --logappend --journal $MONGO_URL --smallfiles
+    ## NEW: Logging to syslog, that usually has already log rotation.
+    mongod --dbpath $SNAP_COMMON --syslog --journal $MONGO_URL --smallfiles
 
 fi
 
-- 
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