rollback: check if rollback is possible. default hostname

Author: simonwalz

system/cuos/rollback.sh

@@ -4,6 +4,11 @@ set -x
 
 SCRIPT_DIR=$( cd -- "$( dirname -- "${BASH_SOURCE[0]}" )" &> /dev/null && pwd )
 
+if [[ ! -f "/system_next.json" ]]; then
+	echo "Rollback not possible. No previous system."
+	exit 1
+fi
+
 VIRT_TYPE="$(systemd-detect-virt)"
 if [[ "${VIRT_TYPE}" = "lxc" ]]; then
 	"${SCRIPT_DIR}/lxc-rollback.sh" "$@"

system/cuos/system_default.json

@@ -1,5 +1,5 @@
 {
-	"hostname": "sd-genesis-os",
+	"hostname": "cuos-system",
 	"update_registry": "gitlab.triovega.com:4567/securitygateway",
 	"update_registry_user": "securitygateway",
 	"update_registry_password": "",