Better way to launch system tests than through direct commands in gitlab CI file

continuousintegration/orchestration/run_systemtest.sh

+#!/bin/bash
+
+# makes sure that set -e from gitlab CI scripts is not enabled
+set +e
+# enable pipefail to get the return code of a failed command in pipeline and not the return code of the last command in pipeline:
+# http://stackoverflow.com/questions/6871859/piping-command-output-to-tee-but-also-save-exit-code-of-command
+set -o pipefail
+
+# global variable to capture the return code of the last command executed in execute_log function
+execute_log_rc=0
+# orchestration directory so that we can come back here and launch delete_instance during cleanup
+orchestration_dir=${PWD}
+
+
+usage() { cat <<EOF 1>&2
+Usage: $0 -s <systemtest_script> [-p <gitlab pipeline ID>]
+
+Create a kubernetes instance and launch the system test script specified.
+Makes sure the created instance is cleaned up at the end and return the status of the system test.
+EOF
+
+exit 1
+}
+
+while getopts "s:" o; do
+    case "${o}" in
+        s)
+            systemtest_script=${OPTARG}
+            test -f ${systemtest_script} || error="${error}Objectstore configmap file ${config_objectstore} does not exist\n"
+            ;;
+        *)
+            usage
+            ;;
+    esac
+done
+shift $((OPTIND-1))
+
+if [ -z "${systemtest_script}" ]; then
+    echo "a systemtest script is mandatory" 1>&2 
+    usage
+fi
+
+if [ ! -z "${error}" ]; then
+    echo -e "ERROR:\n${error}"
+    exit 1
+fi
+
+
+function execute_log {
+  mycmd=$1
+  logfile=$2
+  echo "$(date): Launching ${mycmd}"
+  eval "${mycmd} | tee -a ${logfile}"
+  execute_log_rc=$?
+
+  if [ "${execute_log_rc}" != "0" ]; then
+    echo "FAILURE: cleaning up environment"
+    cd ${orchestration_dir}
+    ./delete_instance.sh -n ${NAMESPACE}
+    exit 1
+  fi
+}
+
+# create instance
+execute_log "./create_instance.sh -n ${NAMESPACE} -p ${CI_PIPELINE_ID} -D -O 2>&1" "${orchestration_dir}/../../create_instance.log"
+
+# launch system test
+cd $(dirname ${systemtest_script})
+execute_log "./$(basename ${systemtest_script}) 2>&1" "${orchestration_dir}/../../systests.sh.log"
+cd ${orchestration_dir}
+
+# delete instance
+./delete_instance.sh -n ${NAMESPACE}
+exit $?