To restore Docker containers from Dropbox backups

restore.sh

#!/bin/bash

# Usage example: ./script.sh container_name dropbox_user -days_back, i.e. ./script.sh jenkins EA -1

# Variables
CONTAINER_NAME=$1
IMAGE_NAME=$(docker ps -f name=$CONTAINER_NAME --format {{.Image}})
DATE=$(date +"%Y-%m-%d" --date="$3 day")

# From which Dropbox to download
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

function download_sql {
  # Download .tar.gz or .sql
  $DROPBOX_UPLOADER -f $APP_KEY download /$CONTAINER_NAME/"$CONTAINER_NAME"_"$DATE".sql /tmp/
}

function download_tar {
  # Download .tar.gz or .sql
  $DROPBOX_UPLOADER -f $APP_KEY download /$CONTAINER_NAME/"$CONTAINER_NAME"_"$DATE".tar.gz /tmp/
}

function import_sql {
  docker exec -i $CONTAINER_NAME sh -c 'mysql -uroot -p"$MYSQL_ROOT_PASSWORD"' < /tmp/$CONTAINER_NAME/"$CONTAINER_NAME"_"$DATE".sql
}

function extract_files {
  # Stop container
  docker stop $CONTAINER_NAME

  # Check if container stopped successfully
  if [[ $(docker ps -f name=$CONTAINER_NAME --format "{{.Names}}") == "$CONTAINER_NAME" ]]; then
    printf "$CONTAINER_NAME failed to stop. It's currently in $(docker ps -f name=$CONTAINER_NAME --format "{{.Status}}") status."
    exit 1
  fi

  # Extract backup and place it to data volume
  tar zxfv /tmp/$CONTAINER_NAME/"$CONTAINER_NAME"_"$DATE".tar.gz -C /

  # Start container
  docker start $CONTAINER_NAME

  # Check if container started successfully
  if [[ $(docker ps -f name=$CONTAINER_NAME --format "{{.Names}}") == "$CONTAINER_NAME" ]]; then
    exit 0
  else
    printf "$CONTAINER_NAME failed to start. It's current status is $(docker ps -a -f name=$CONTAINER_NAME --format "{{.Status}}")"
    exit 1
  fi
}

function gitlab_restore {
  # Download newest backup file
  $DROPBOX_UPLOADER -f $APP_KEY download $($DROPBOX_UPLOADER -f $APP_KEY list $CONTAINER_NAME | tail -1 | awk '{print $3}') /tmp/
  # Copy backup to gitlab data volume
  docker cp /tmp/*"$CONTAINER_NAME"*.tar gitlab:/var/opt/gitlab/backups/
  # Initialise restore
  docker exec -ti gitlab sh -c "gitlab-rake gitlab:backup:restore"

}

# Create directory where backups will be downloaded
mkdir -p /tmp/$CONTAINER_NAME

case $IMAGE_NAME in
  *mysql*)
    download_sql
    import_sql
    ;;
  *mariadb*)
    download_sql
    import_sql
    ;;
  *gitlab*)
    gitlab_restore
    ;;
  *)
    download_tar
    extract_files
    ;;
esac

# Cleanup
rm -rv /tmp/$CONTAINER_NAME