backup

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

BACKUP_BASENAME="$(basename "$1")"
BACKUP_DIRNAME="$(realpath "$(dirname "$1")")"

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

[ -z "$1" ] && fail "Usage: $0 backup-filename.tar.gz"

# Write to the file before starting Docker: we need the file to exist for
# Docker to mount it.
: > "$1" || fail "Could not create file '$1'. Aborting."

. "$(dirname "$0")"/common.sh

# 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 "$1")":/out.tar.gz \
  --rm "$UBUNTU_IMAGE" \
  tar -czpf /out.tar.gz -C / var/lib/postgresql/data var/lib/overview/searchindex var/lib/overview/blob-storage