Add INIT_BACKUP to backup when the container is started

Author: tifayuki

README.md

@@ -27,6 +27,7 @@ Moreover, if you link `tutum/mongodb-backup` to a mongodb container(e.g. `tutum/
     EXTRA_OPTS      the extra options to pass to mongodump command
     CRON_TIME       the interval of cron job to run mongodump. `0 0 * * *` by default, which is every day at 00:00
     MAX_BACKUPS     the number of backups to keep. When reaching the limit, the old backup will be discarded. No limit, by default
+    INIT_BACKUP     if set, create a backup when the container launched
 
 ## Restore from a backup
 

run.sh

@@ -26,7 +26,7 @@ cat <<EOF >> /backup.sh
 #!/bin/bash
 MAX_BACKUPS=${MAX_BACKUPS}
 
-echo "=> Starting backup"
+echo "=> Backup started"
 if [ -n "\${MAX_BACKUPS}" ]; then
     while [ \$(ls /backup -N1 | wc -l) -ge \${MAX_BACKUPS} ];
     do
@@ -50,11 +50,16 @@ echo "=> Done"
 EOF
 chmod +x /restore.sh
 
+touch /mongo_backup.log
+tail -F /mongo_backup.log &
+
+if [ -n "${INIT_BACKUP}" ]; then
+    echo "=> Create a backup on start the container"
+    /backup.sh
+fi
+
 echo "${CRON_TIME} /backup.sh >> /mongo_backup.log 2>&1" > /crontab.conf
-echo "=> Adding cron job"
 crontab  /crontab.conf
 crontab -l
-touch /mongo_backup.log
-tail -F /mongo_backup.log &
 echo "=> Running cron job"
 exec cron -f