initial release

rootfs/app/backup.sh

@@ -0,0 +1,107 @@
+#!/bin/sh
+
+set -o pipefail
+
+STATUS_FILE=/last_backup_status.txt
+
+
+MARIADB_HOST=${MARIADB_HOST:-db}
+MARIADB_USER=${MARIADB_USER:-root}
+MARIADB_PORT=${MARIADB_PORT:-3306}
+MARIADB_PASSWORD=${MARIADB_PASSWORD:-1StrongPassword}
+MARIADB_DATABASE=${MARIADB_DATABASE:-my-db}
+COMPRESSION=${COMPRESSION:-gzip}
+RCLONE_CONFIG_FILE=${RCLONE_CONFIG_FILE:-/config/rclone.conf}
+RCLONE_REMOTE=${RCLONE_REMOTE:-myremote}
+RCLONE_PATH=${RCLONE_PATH:-/backups}
+
+TMPDIR=$(mktemp -d)
+DEST_FILENAME=$(date +%Y-%m-%d_%H-%M-%S).sql
+BACKUP_FILE="${TMPDIR}/${DEST_FILENAME}"
+
+
+trap cleanup EXIT
+cleanup() {
+#   rm -rf "${TMPDIR}"
+  echo "Removed temporary file"
+}
+
+if [ ! -f "${RCLONE_CONFIG_FILE}" ]; then
+  echo "Rclone config file not found"
+  exit 1
+fi
+
+echo "Backup started"
+
+dump_failed() {
+  echo "Database dump failed"
+  echo "dump failed" > "${STATUS_FILE}"
+  exit 1
+}
+
+mkdir_failed() {
+  echo "Backup mkdir failed"
+  echo "mkdir failed" > "${STATUS_FILE}"
+  exit 1
+}
+
+copy_failed() {
+  echo "Backup copy failed"
+  echo "copy failed" > "${STATUS_FILE}"
+  exit 1
+}
+
+COMPRESSOR=cat
+if [ "${COMPRESSION}" = "gzip" ]; then
+  COMPRESSOR="gzip"
+  BACKUP_FILE="${BACKUP_FILE}.gz"
+  DEST_FILENAME="${DEST_FILENAME}.gz"
+fi
+if [ "${COMPRESSION}" = "bzip2" ]; then
+  COMPRESSOR="bzip2"
+  BACKUP_FILE="${BACKUP_FILE}.bz2"
+  DEST_FILENAME="${DEST_FILENAME}.bz2"
+fi
+if [ "${COMPRESSION}" = "xz" ]; then
+  COMPRESSOR="xz"
+  BACKUP_FILE="${BACKUP_FILE}.xz"
+  DEST_FILENAME="${DEST_FILENAME}.xz"
+fi
+if [ "${COMPRESSION}" = "zstd" ]; then
+  COMPRESSOR="zstd"
+  BACKUP_FILE="${BACKUP_FILE}.zst"
+  DEST_FILENAME="${DEST_FILENAME}.zst"
+fi
+
+
+
+echo "Dumping database into: ${BACKUP_FILE}"
+mariadb-dump \
+  --add-drop-table \
+  --add-drop-trigger \
+  --add-locks \
+  --disable-keys \
+  --lock-all-tables \
+  --quick \
+  --triggers \
+  --tz-utc -v \
+  --host=${MARIADB_HOST} \
+  --port=${MARIADB_PORT} \
+  --user=${MARIADB_USER} \
+  --password="${MARIADB_PASSWORD}" \
+  --databases "${MARIADB_DATABASE}" | "${COMPRESSOR}" > "${BACKUP_FILE}" || dump_failed
+
+
+echo "Copying backup to remote"
+
+rclone \
+  -v --config "${RCLONE_CONFIG_FILE}" \
+  mkdir "${RCLONE_REMOTE}:${RCLONE_PATH}" || mkdir_failed
+
+rclone \
+  -v --config "${RCLONE_CONFIG_FILE}" \
+  copy "${BACKUP_FILE}" "${RCLONE_REMOTE}:${RCLONE_PATH}" || copy_failed
+
+echo "success" > "${STATUS_FILE}"
+
+echo "Backup completed"

rootfs/app/entrypoint.sh

@@ -0,0 +1,7 @@
+#!/bin/sh
+
+CRONTAB=${CRONTAB:-"0 12 * * *"}
+
+echo "${CRONTAB} /app/backup.sh" > /etc/crontabs/root
+
+crond -f

rootfs/app/healthcheck.sh

@@ -0,0 +1,13 @@
+#!/bin/sh
+
+STATUS_FILE=/last_backup_status.txt
+
+if [ ! -f "${STATUS_FILE}" ]; then
+  exit 0
+fi
+
+if [ "$(cat "${STATUS_FILE}")" != "success" ]; then
+  exit 1
+fi
+
+exit 0