161 lines
6.3 KiB
Python
161 lines
6.3 KiB
Python
# Copyright 2015 Hewlett Packard Enterprise Development Company LP
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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import os
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import stat
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import subprocess
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import flask
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import jinja2
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from oslo_log import log as logging
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import webob
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from octavia.amphorae.backends.agent.api_server import listener
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from octavia.amphorae.backends.agent.api_server import util
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from octavia.common import constants as consts
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BUFFER = 100
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LOG = logging.getLogger(__name__)
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j2_env = jinja2.Environment(autoescape=True, loader=jinja2.FileSystemLoader(
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os.path.dirname(os.path.realpath(__file__)) + consts.AGENT_API_TEMPLATES))
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UPSTART_TEMPLATE = j2_env.get_template(consts.KEEPALIVED_JINJA2_UPSTART)
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SYSVINIT_TEMPLATE = j2_env.get_template(consts.KEEPALIVED_JINJA2_SYSVINIT)
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SYSTEMD_TEMPLATE = j2_env.get_template(consts.KEEPALIVED_JINJA2_SYSTEMD)
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check_script_template = j2_env.get_template(consts.CHECK_SCRIPT_CONF)
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class Keepalived(object):
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def upload_keepalived_config(self):
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stream = listener.Wrapped(flask.request.stream)
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if not os.path.exists(util.keepalived_dir()):
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os.makedirs(util.keepalived_dir())
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os.makedirs(util.keepalived_check_scripts_dir())
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conf_file = util.keepalived_cfg_path()
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flags = os.O_WRONLY | os.O_CREAT | os.O_TRUNC
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# mode 00644
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mode = stat.S_IRUSR | stat.S_IWUSR | stat.S_IRGRP | stat.S_IROTH
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with os.fdopen(os.open(conf_file, flags, mode), 'wb') as f:
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b = stream.read(BUFFER)
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while b:
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f.write(b)
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b = stream.read(BUFFER)
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init_system = util.get_os_init_system()
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file_path = util.keepalived_init_path(init_system)
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if init_system == consts.INIT_SYSTEMD:
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template = SYSTEMD_TEMPLATE
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init_enable_cmd = "systemctl enable octavia-keepalived"
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elif init_system == consts.INIT_UPSTART:
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template = UPSTART_TEMPLATE
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elif init_system == consts.INIT_SYSVINIT:
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template = SYSVINIT_TEMPLATE
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init_enable_cmd = "insserv {file}".format(file=file_path)
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else:
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raise util.UnknownInitError()
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if init_system == consts.INIT_SYSTEMD:
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# mode 00644
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mode = stat.S_IRUSR | stat.S_IWUSR | stat.S_IRGRP | stat.S_IROTH
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else:
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# mode 00755
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mode = (stat.S_IRWXU | stat.S_IRGRP | stat.S_IXGRP |
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stat.S_IROTH | stat.S_IXOTH)
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if not os.path.exists(file_path):
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with os.fdopen(os.open(file_path, flags, mode), 'w') as text_file:
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text = template.render(
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keepalived_pid=util.keepalived_pid_path(),
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keepalived_cmd=consts.KEEPALIVED_CMD,
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keepalived_cfg=util.keepalived_cfg_path(),
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keepalived_log=util.keepalived_log_path(),
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amphora_nsname=consts.AMPHORA_NAMESPACE
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)
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text_file.write(text)
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# Renders the Keepalived check script
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keepalived_path = util.keepalived_check_script_path()
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# mode 00755
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mode = (stat.S_IRWXU | stat.S_IRGRP | stat.S_IXGRP |
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stat.S_IROTH | stat.S_IXOTH)
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open_obj = os.open(keepalived_path, flags, mode)
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with os.fdopen(open_obj, 'w') as text_file:
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text = check_script_template.render(
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check_scripts_dir=util.keepalived_check_scripts_dir()
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)
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text_file.write(text)
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# Make sure the new service is enabled on boot
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if init_system != consts.INIT_UPSTART:
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try:
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subprocess.check_output(init_enable_cmd.split(),
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stderr=subprocess.STDOUT)
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except subprocess.CalledProcessError as e:
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LOG.debug('Failed to enable octavia-keepalived service: '
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'%(err)s %(output)s', {'err': e, 'output': e.output})
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return webob.Response(json=dict(
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message="Error enabling octavia-keepalived service",
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details=e.output), status=500)
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res = webob.Response(json={'message': 'OK'}, status=200)
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res.headers['ETag'] = stream.get_md5()
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return res
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def manager_keepalived_service(self, action):
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action = action.lower()
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if action not in [consts.AMP_ACTION_START,
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consts.AMP_ACTION_STOP,
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consts.AMP_ACTION_RELOAD]:
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return webob.Response(json=dict(
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message='Invalid Request',
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details="Unknown action: {0}".format(action)), status=400)
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if action == consts.AMP_ACTION_START:
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keepalived_pid_path = util.keepalived_pid_path()
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try:
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# Is there a pid file for keepalived?
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with open(keepalived_pid_path, 'r') as pid_file:
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pid = int(pid_file.readline())
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os.kill(pid, 0)
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# If we got here, it means the keepalived process is running.
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# We should reload it instead of trying to start it again.
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action = consts.AMP_ACTION_RELOAD
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except (IOError, OSError):
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pass
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cmd = ("/usr/sbin/service octavia-keepalived {action}".format(
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action=action))
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try:
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subprocess.check_output(cmd.split(), stderr=subprocess.STDOUT)
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except subprocess.CalledProcessError as e:
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LOG.debug('Failed to %s octavia-keepalived service: %s %s',
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action, e, e.output)
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return webob.Response(json=dict(
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message="Failed to {0} octavia-keepalived service".format(
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action), details=e.output), status=500)
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return webob.Response(
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json=dict(message='OK',
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details='keepalived {action}ed'.format(action=action)),
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status=202)
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