Initial thoughts

.dockerignore

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+.gitignore
+Dockerfile
+LICENSE
+*.md

Dockerfile

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+FROM alpine:latest
+RUN apk add --no-cache mariadb-client rclone curl supercronic
+COPY entrypoint.sh opt
+CMD ["/opt/entrypoint.sh"]

entrypoint.sh

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+#!/bin/sh
+
+CRON_CONFIG_FILE="/opt/crontab"
+
+echo "${CRON} sh /opt/seafile-backup.sh" > $CRON_CONFIG_FILE
+
+exec supercronic -passthrough-logs -quiet $CRON_CONFIG_FILE

seafile-backup.sh

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+#!/bin/sh
+
+# Variables
+DATE=`date +%F`
+TIME=`date +%H%M`
+BACKUPDIR=/backup
+SEAFDIR=/opt/seafile
+BACKUPFILE=$BACKUPDIR/seafile-$DATE-$TIME.tar
+TEMPDIR=/tmp/seafile-$DATE-$TIME
+
+# Shutdown seafile
+docker exec $seafilecontainer $SEAFDIR/seafile-server-latest/seahub.sh stop
+docker exec $seafilecontainer $SEAFDIR/seafile-server-latest/seafile.sh stop
+
+# Create directories
+if [ ! -d $BACKUPDIR ]
+  then
+  echo Creating Backupdirectory $BACKUPDIR...
+  mkdir -pm 0600 $BACKUPDIR
+fi
+if [ ! -d $TEMPDIR ]
+  then
+  echo Create temporary directory $TEMPDIR...
+  mkdir -pm 0600 $TEMPDIR
+  mkdir -m 0600 $TEMPDIR/databases
+  mkdir -m 0600 $TEMPDIR/data
+fi
+
+# Dump data / copy data
+echo Dumping ccnet database...
+mysqldump -h $mysqlhost -u $mysqlusername -p $mysqlpassword --skip-opt ccnet-db > $TEMPDIR/databases/ccnet-db.sql.`date +"%Y-%m-%d-%H-%M-%S"`
+if [ -e $TEMPDIR/databases/ccnet-db.sql.* ]; then echo ok.; else echo ERROR.; fi
+echo Dumping SeaFile database...
+mysqldump -h $mysqlhost -u $mysqlusername -p $mysqlpassword --skip-opt seafile-db > $TEMPDIR/databases/seafile-db.sql.`date +"%Y-%m-%d-%H-%M-%S"`
+if [ -e $TEMPDIR/databases/seafile-db.sql.* ]; then echo ok.; else echo ERROR.; fi
+echo Dumping SeaHub database...
+mysqldump -h $mysqlhost -u $mysqlusername -p $mysqlpassword --skip-opt seahub-db > $TEMPDIR/databases/seahub-db.sql.`date +"%Y-%m-%d-%H-%M-%S"`
+if [ -e $TEMPDIR/databases/seahub-db.sql.* ]; then echo ok.; else echo ERROR.; fi
+
+echo Copying seafile directory...
+rsync -az $SEAFDIR/* $TEMPDIR/data
+if [ -d $TEMPDIR/data/seafile-data ]; then echo ok.; else echo ERROR.; fi
+
+# Start the server
+docker exec $seafilecontainer $SEAFDIR/seafile-server-latest/seafile.sh start
+docker exec $seafilecontainer $SEAFDIR/seafile-server-latest/seahub.sh start-fastcgi
+
+# compress data
+echo Archive the backup...
+cd $TEMPDIR
+tar -cf $BACKUPFILE *
+gzip $BACKUPFILE
+if [ -e $BACKUPFILE.gz ]; then echo ok.; else echo ERROR.; fi
+
+# Cleanup
+echo Deleting temporary files...
+rm -Rf $TEMPDIR
+if [ ! -d $TEMPDIR ]; then echo ok.; else echo ERROR.; fi