Update metadata scripts to default to bash. (#287)

2 files changed, 4 insertions, 4 deletions

diff --git a/google_compute_engine/metadata_scripts/script_executor.py b/google_compute_engine/metadata_scripts/script_executor.py
index 1293833..d152d60 100644
--- a/google_compute_engine/metadata_scripts/script_executor.py
+++ b/google_compute_engine/metadata_scripts/script_executor.py
@@ -50,8 +50,8 @@ class ScriptExecutor(object):
       metadata_script: string, the file location of an executable script.
     """
     process = subprocess.Popen(
-        metadata_script, shell=True, stderr=subprocess.STDOUT,
-        stdout=subprocess.PIPE)
+        metadata_script, shell=True, executable='/bin/bash',
+        stderr=subprocess.STDOUT, stdout=subprocess.PIPE)
     while True:
       for line in iter(process.stdout.readline, b''):
         message = line.decode('utf-8').rstrip('\n')
diff --git a/google_compute_engine/metadata_scripts/tests/script_executor_test.py b/google_compute_engine/metadata_scripts/tests/script_executor_test.py
index ffe8b99..84c66d4 100644
--- a/google_compute_engine/metadata_scripts/tests/script_executor_test.py
+++ b/google_compute_engine/metadata_scripts/tests/script_executor_test.py
@@ -62,8 +62,8 @@ class ScriptExecutorTest(unittest.TestCase):
     ]
     self.assertEqual(self.mock_logger.info.mock_calls, expected_calls)
     mock_subprocess.Popen.assert_called_once_with(
-        self.metadata_script, shell=True, stderr=mock_subprocess.STDOUT,
-        stdout=mock_subprocess.PIPE)
+        self.metadata_script, shell=True, executable='/bin/bash',
+        stderr=mock_subprocess.STDOUT, stdout=mock_subprocess.PIPE)
     mock_process.poll.assert_called_once_with()
 
   def testRunScripts(self):