the_prg_server_configuration/nix-system-configs/modules/system_scripts/backup_mariadb.zsh

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#!/usr/bin/env bash
set -euo pipefail
TIMESTAMP=$(date +%Y%m%d%H%M%S)
BACKUP_DIR=$(mktemp -d)
trap 'rm -rf "$BACKUP_DIR"' EXIT
gpg --batch --import "${GPG_KEY_FILE}"
DATABASES=$(mysql -u root -e "SHOW DATABASES;" | grep -Ev "^(Database|information_schema|performance_schema|mysql|sys)$")
for DB in $DATABASES; do
echo "Backing up MariaDB database: $DB"
FILENAME="mariadb_${DB}_${TIMESTAMP}.sql.gz.gpg"
if mysqldump -u root "$DB" | gzip | gpg --batch --encrypt --recipient "${GPG_RECIPIENT}" > "$BACKUP_DIR/$FILENAME"; then
gsutil cp "$BACKUP_DIR/$FILENAME" "gs://${GCS_BUCKET}/mariadb/$FILENAME"
echo "Successfully uploaded encrypted $FILENAME"
else
echo "Failed to backup $DB" >&2
exit 1
fi
done