Bottlenecks stack environment prepare

JIRA: BOTTLENECK-124

This code is for Bottlenecks to have a common way to prepare stack
environment.
those action are divided into three part: fetch os file, source file
and adding ext-net to source file.
those function also need change other file like fetch_os_creds.sh.
And add some config to config file.
remove parser file logging function.

This code is relying on the patch:
Modify utils/ code into PEP8 style

Change-Id: I54405776b6dc3f5fb939e511c96963a9c1624938
Signed-off-by: liyin <liyin11@huawei.com>

1 files changed, 79 insertions, 0 deletions

diff --git a/utils/env_prepare/stack_prepare.py b/utils/env_prepare/stack_prepare.py
new file mode 100644
index 00000000..37b523d1
--- /dev/null
+++ b/utils/env_prepare/stack_prepare.py
@@ -0,0 +1,79 @@
+#!/usr/bin/env python
+##############################################################################
+# Copyright (c) 2017 Huawei Technologies Co.,Ltd and others.
+#
+# All rights reserved. This program and the accompanying materials
+# are made available under the terms of the Apache License, Version 2.0
+# which accompanies this distribution, and is available at
+# http://www.apache.org/licenses/LICENSE-2.0
+##############################################################################
+import os
+import subprocess
+import errno
+from utils.logger import Logger
+from utils.parser import Parser as config
+import utils.infra_setup.heat.manager as utils
+
+LOG = Logger(__name__).getLogger()
+
+
+def _prepare_env_daemon():
+
+    installer_ip = os.environ.get('INSTALLER_IP', 'undefined')
+    installer_type = os.environ.get('INSTALLER_TYPE', 'undefined')
+
+    rc_file = config.bottlenecks_config["rc_dir"]
+
+    _get_remote_rc_file(rc_file, installer_ip, installer_type)
+
+    _source_file(rc_file)
+
+    _append_external_network(rc_file)
+
+    # update the external_network
+    _source_file(rc_file)
+
+
+def _get_remote_rc_file(rc_file, installer_ip, installer_type):
+
+    RELENG_DIR = config.bottlenecks_config["releng_dir"]
+    OS_FETCH_SCRIPT = config.bottlenecks_config["fetch_os"]
+    os_fetch_script = os.path.join(RELENG_DIR, OS_FETCH_SCRIPT)
+
+    try:
+        cmd = [os_fetch_script, '-d', rc_file, '-i', installer_type,
+               '-a', installer_ip]
+        p = subprocess.Popen(cmd, stdout=subprocess.PIPE)
+        p.communicate()[0]
+
+        if p.returncode != 0:
+            LOG.debug('Failed to fetch credentials from installer')
+    except OSError as e:
+        if e.errno != errno.EEXIST:
+            raise
+
+
+def _source_file(rc_file):
+    p = subprocess.Popen(". %s; env" % rc_file, stdout=subprocess.PIPE,
+                         shell=True)
+    output = p.communicate()[0]
+    env = dict((line.split('=', 1) for line in output.splitlines()))
+    os.environ.update(env)
+    return env
+
+
+def _append_external_network(rc_file):
+    neutron_client = utils._get_neutron_client()
+    networks = neutron_client.list_networks()['networks']
+    try:
+        ext_network = next(n['name'] for n in networks if n['router:external'])
+    except StopIteration:
+        LOG.warning("Can't find external network")
+    else:
+        cmd = 'export EXTERNAL_NETWORK=%s' % ext_network
+        try:
+            with open(rc_file, 'a') as f:
+                f.write(cmd + '\n')
+        except OSError as e:
+            if e.errno != errno.EEXIST:
+                raise