Load Balancing as a Service (LBaaS) for OpenStack
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# Copyright 2017 Rackspace, US Inc.
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
# http://www.apache.org/licenses/LICENSE-2.0
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
import re
import subprocess
from oslo_log import log as logging
LOG = logging.getLogger(__name__)
def get_haproxy_versions():
"""Get major and minor version number from haproxy
:returns major_version: The major version digit
:returns minor_version: The minor version digit
cmd = "haproxy -v"
version = subprocess.check_output(cmd.split(), stderr=subprocess.STDOUT)
version_re = re.search(r'.*version (.+?)\.(.+?)(\.|-dev).*',
major_version = int(version_re.group(1))
minor_version = int(version_re.group(2))
return major_version, minor_version
def process_cfg_for_version_compat(haproxy_cfg):
major, minor = get_haproxy_versions()
# Versions less than 1.6 do not support external health checks
# Removed those configuration times
if major < 2 and minor < 6:
LOG.warning("Found %(major)s.%(minor)s version of haproxy. "
"Disabling external checks. Health monitor of type "
"PING will revert to TCP.",
{'major': major, 'minor': minor})
haproxy_cfg = re.sub(r" * ?.*external-check ?.*\s", "", haproxy_cfg)
return haproxy_cfg