restore-from-backup

#!/bin/sh
#
# Writes a backup of all Overview's dynamic data to "$1".
#
# Restore it by running "./restore $1".

DIRNAME="$(dirname "$0")"

fail() {
  echo "$1" >&2
  exit 1
}

[ ! -z "$1" ] || fail "Usage: $0 backup-filename.tar.gz"
[ -f "$1" ] || fail "'$1' is not a file"
[ -r "$1" ] || fail "You do not have access to read '$1'"

echo "This will DESTROY all Overview's live data!"
echo
read -p "Are you sure? [yn] " REPLY
[ "$REPLY" = "y" ] || fail 'You did not enter "y". Aborting.'

. "$DIRNAME"/common.sh

echo "Ensuring Overview is not running..."
"$DIRNAME"/stop

echo "Wiping data..."
docker volume remove overviewlocal_overview-database-data
docker volume remove overviewlocal_overview-searchindex-data
docker volume remove overviewlocal_overview-blob-storage
docker volume create overviewlocal_overview-database-data
docker volume create overviewlocal_overview-searchindex-data
docker volume create overviewlocal_overview-blob-storage

echo "Inserting backup data..."
# We use ubuntu, not busybox, because its tar/gzip are far faster
#
# Plus, the "-p" flag is handy
docker run \
  --volume overviewlocal_overview-database-data:/var/lib/postgresql/data \
  --volume overviewlocal_overview-searchindex-data:/var/lib/overview/searchindex \
  --volume overviewlocal_overview-blob-storage:/var/lib/overview/blob-storage \
  --volume "$(realpath "$1")":/in.tar.gz \
  --rm "$UBUNTU_IMAGE" \
  tar -xzpf /in.tar.gz -C /

echo "Restore complete!"
echo "Run \"$DIRNAME/start\" to start Overview with the restored data."