Docker containers backup

backup.sh

#!/bin/bash

# Variables
CONTAINER_NAME=$1
IMAGE_NAME=$(docker ps -f name=$CONTAINER_NAME --format {{.Image}})
TMP_DIR="/tmp"
DATE=$(date +"%Y-%m-%d")
DATA_VOLUMES=$(docker inspect --format '{{range .Mounts}}{{.Source}}{{" "}}{{end}}' $CONTAINER_NAME)
BKP_FILE="$TMP_DIR"/"$CONTAINER_NAME"_"$DATE"

# To which Dropbox to upload

if [[ "$2" == "EA" ]]; then
  DROPBOX_UPLOADER=/home/Backups/gitlab.sh
  APP_KEY=/home/Backups/.gitlab_dropbox_uploader
elif [[ "$2" == "IGC" ]]; then
    DROPBOX_UPLOADER=/home/Backups/ignasc.sh
    APP_KEY=/home/Backups/.ignasc_dropbox_uploader
  else
    DROPBOX_UPLOADER=/home/Backups/gitlab.sh
    APP_KEY=/home/Backups/.gitlab_dropbox_uploader
fi

# Functions

function database_backup {
  docker exec $CONTAINER_NAME sh -c 'exec mysqldump -uroot -p"$MYSQL_ROOT_PASSWORD" --all-databases' > "$BKP_FILE".sql | tee -a /var/log/backup.log
}

function data_volume_backup {
  tar zcf "$BKP_FILE".tar.gz $DATA_VOLUMES | tee -a /var/log/backup.log
}

function gitlab_backup {
  docker exec -i gitlab sh -c "gitlab-rake gitlab:backup:create" | tee -a /var/log/backup.log
  $DROPBOX_UPLOADER -f $APP_KEY upload /var/lib/docker/volumes/2d491b8959dae66554b18406ae9f205a598f2cf9e9ec190671550a57131cf320/_data/backups/*.tar  /"$CONTAINER_NAME"/ | tee -a /var/log/backup.log
  rm -rfv /var/lib/docker/volumes/2d491b8959dae66554b18406ae9f205a598f2cf9e9ec190671550a57131cf320/_data/backups/* | tee -a /var/log/backup.log
  exit
}

# Determine how to backup certain container (based on image)

case $IMAGE_NAME in
  *mysql*)
    database_backup
    ;;
  *mariadb*)
    database_backup
    ;;
  *gitlab*)
    gitlab_backup
    ;;
  *)
    data_volume_backup
    ;;
esac

# Upload archives to Dropbox
$DROPBOX_UPLOADER -f $APP_KEY upload "$BKP_FILE".* /"$CONTAINER_NAME"/ | tee -a /var/log/backup.log

# Cleanup
DELDATE=`date --date="-14 day" +%Y-%m-%d`
$DROPBOX_UPLOADER -f $APP_KEY delete /"$CONTAINER_NAME"/"$CONTAINER_NAME"_"$DELDATE".tar.gz | tee -a /var/log/backup.log
rm -rfv "$BKP_FILE".* | tee -a /var/log/backup.log