docker/demo/backup.sh


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#!/bin/bash

set -eu

if ! which docker > /dev/null; then
  echo docker not found.
  exit 1
fi

if ! docker images | grep debian | grep stable > /dev/null; then
  echo debian:stable not found.  Please extract backup with custom image.
  exit 2
fi

BACKUP_FILE="/tmp/$(date +%Y-%m-%d)-taler-backup.tar"

if test -a $BACKUP_FILE; then 
  echo "Backup file $BACKUP_FILE exists already, please move it and run the script again."
  exit 3 
fi

# 'chown' should still help rootful runs to
# have the TAR owned by the user invoking the command.
docker run \
  -v /tmp:/tmp \
  -v demo_talerdata:/taler-data \
  -v demo_talerlogs:/taler-logs \
  -it debian:stable \
  /bin/bash -c "tar --no-same-owner --no-same-permissions -c -f ${BACKUP_FILE} /taler-data /taler-logs" > /dev/null

echo Backup at: ${BACKUP_FILE}