Add functions to fetch OS_* env variables from stackrc and overcloudrc files

Change-Id: I27053aae5836820e624d0f5e1140fcb779610736

tobiko/tests/functional/tripleo/test_undercloud.py

@@ -20,7 +20,6 @@ from tobiko.shell import sh
 from tobiko.tripleo import undercloud
 
 CONF = config.CONF
-TRIPLEO_CONF = CONF.tobiko.tripleo
 
 
 @undercloud.skip_if_missing_undercloud
@@ -34,13 +33,15 @@ class UndercloudSshConnectionTest(testtools.TestCase):
         self.ssh_client.connect()
 
     def test_fetch_undercloud_credentials(self):
-        self._test_fetch_credentials(rcfile=TRIPLEO_CONF.undercloud_rcfile)
+        env = undercloud.load_undercloud_rcfile()
+        self._test_fetch_credentials(env=env)
 
     def test_fetch_overcloud_credentials(self):
-        self._test_fetch_credentials(rcfile=TRIPLEO_CONF.overcloud_rcfile)
+        env = undercloud.load_overcloud_rcfile()
+        self._test_fetch_credentials(env=env)
+
+    def _test_fetch_credentials(self, env):
 
-    def _test_fetch_credentials(self, rcfile):
-        env = self.fetch_os_env(rcfile=rcfile)
         self.assertTrue(env['OS_AUTH_URL'])
         self.assertTrue(env.get('OS_USERNAME') or env.get('OS_USER_ID'))
         self.assertTrue(env['OS_PASSWORD'])
@@ -49,15 +50,6 @@ class UndercloudSshConnectionTest(testtools.TestCase):
                         env.get('OS_TENANT_ID') or
                         env.get('OS_PROJECT_ID'))
 
-    def fetch_os_env(self, rcfile):
-        command = ". {rcfile}; env | grep '^OS_'".format(rcfile=rcfile)
-        result = sh.execute(command, ssh_client=self.ssh_client)
-        env = {}
-        for line in result.stdout.splitlines():
-            name, value = line.split('=')
-            env[name] = value
-        return env
-
     def test_execute_command(self):
         result = sh.execute('hostname', ssh_client=self.ssh_client)
         self.assertTrue(result.stdout.startswith('undercloud-0'))

tobiko/tripleo/undercloud.py

@@ -1,8 +1,11 @@
 from __future__ import absolute_import
 
 import tobiko
-
 from tobiko.shell import ssh
+from tobiko.shell import sh
+from tobiko import config
+
+CONF = config.CONF
 
 
 def undercloud_ssh_client():
@@ -14,6 +17,24 @@ def undercloud_host_config():
     return tobiko.setup_fixture(UndecloudHostConfig)
 
 
+def fetch_os_env(rcfile):
+    command = ". {rcfile}; env | grep '^OS_'".format(rcfile=rcfile)
+    result = sh.execute(command, ssh_client=undercloud_ssh_client())
+    env = {}
+    for line in result.stdout.splitlines():
+        name, value = line.split('=')
+        env[name] = value
+    return env
+
+
+def load_undercloud_rcfile():
+    return fetch_os_env(rcfile=CONF.tobiko.tripleo.undercloud_rcfile)
+
+
+def load_overcloud_rcfile():
+    return fetch_os_env(rcfile=CONF.tobiko.tripleo.overcloud_rcfile)
+
+
 def has_undercloud():
     host_config = undercloud_host_config()
     return bool(host_config.hostname)
@@ -33,9 +54,7 @@ class UndecloudHostConfig(tobiko.SharedFixture):
     key_filename = None
 
     def setup_fixture(self):
-        from tobiko import config
-        conf = config.CONF.tobiko.tripleo
-        self.hostname = conf.undercloud_ssh_hostname
-        self.port = conf.undercloud_ssh_port
-        self.username = conf.undercloud_ssh_username
-        self.key_filename = conf.ssh_key_filename
+        self.hostname = CONF.tobiko.tripleo.undercloud_ssh_hostname
+        self.port = CONF.tobiko.tripleo.undercloud_ssh_port
+        self.username = CONF.tobiko.tripleo.undercloud_ssh_username
+        self.key_filename = CONF.tobiko.tripleo.ssh_key_filename