modified: Dockerfile

modified:   start.sh
Added loop to start.sh script

Dockerfile

@@ -16,8 +16,8 @@ ENV LANG='en_US.UTF-8' \
 RUN echo http://dl-4.alpinelinux.org/alpine/edge/testing >> /etc/apk/repositories && \
   apk -U update && \
   apk -U upgrade && \
-  apk -U add nfs-utils e2fsprogs && \
-#  rm -rf /tmp/src && \
+  apk -U add nfs-utils e2fsprogs util-linux&& \
+  rm -rf /tmp/src && \
   rm -rf /var/cache/apk/*
 
 COPY start.sh /usr/local/bin/start.sh

start.sh

@@ -3,4 +3,20 @@
 ## Script to automate the copy of Sonarr databases
 ##
 echo -e 'Starting the sidecar container to periodically backup the sonarr databases'
-sleep 3600
+echo -e 'Create the ramdisk file'
+dd if=/dev/zero of=/ramdisk/image.ext4 count=0 bs=1 seek=400M
+echo -e 'Create filesystem on ramdisk file'
+mkfs.ext4 /ramdisk/image.ext4
+echo -e 'Mount the ramdisk file to /mnt/sonarr-ramdisk-mount'
+mount /ramdisk/image.ext4 /mnt/sonarr-ramdisk-mount
+echo -e 'Copy the config from the remote share to the ramdisk'
+cp -fvp /config/*.* /mnt/sonarr-ramdisk-mount
+echo -e 'Set up the filesystem freeze, copy, unfreeze loop'
+while true; do 
+  sleep 890
+  sync /mnt/sonarr-ramdisk-mount/*.*
+  fsfreeze --freeze /mnt/sonarr-ramdisk-mount
+  sleep 10
+  cp -fvp /mnt/sonarr-ramdisk-mount/*.* /config/
+  fsfreeze --unfreeze /mnt/sonarr-ramdisk-mount
+done