openstack/charm-nova-cloud-controller
Code Issues Proposed changes

Enable Memcache service for Token Caching

Browse Source 
With the release of 4.2.0 of keystonemiddleware using the
in-process token cache is no longer recommended. It is recommended
that a memcache backend to store tokens is used instead,

This installs and configures memcache and configures neutron-server
to use memcache for token caching.

http://docs.openstack.org/releasenotes/keystonemiddleware/mitaka.html#id2

Change-Id: I747d107d28474d545e4a3612a927d46cae34e6b6
This commit is contained in:
Liam Young 2016-12-09 11:24:37 +00:00
parent 6b6b1497fb
commit dfd8208354
10 changed files with 266 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

67
hooks/charmhelpers/contrib/openstack/amulet/utils.py
View File

@ -1133,3 +1133,70 @@ class OpenStackAmuletUtils(AmuletUtils):
else:
msg = 'No message retrieved.'
amulet.raise_status(amulet.FAIL, msg)
def validate_memcache(self, sentry_unit, conf, os_release,
earliest_release=5, section='keystone_authtoken',
check_kvs=None):
"""Check Memcache is running and is configured to be used
Example call from Amulet test:
def test_110_memcache(self):
u.validate_memcache(self.neutron_api_sentry,
'/etc/neutron/neutron.conf',
self._get_openstack_release())
:param sentry_unit: sentry unit
:param conf: OpenStack config file to check memcache settings
:param os_release: Current OpenStack release int code
:param earliest_release: Earliest Openstack release to check int code
:param section: OpenStack config file section to check
:param check_kvs: Dict of settings to check in config file
:returns: None
"""
if os_release < earliest_release:
self.log.debug('Skipping memcache checks for deployment. {} <'
'mitaka'.format(os_release))
return
_kvs = check_kvs or {'memcached_servers': 'inet6:[::1]:11211'}
self.log.debug('Checking memcached is running')
ret = self.validate_services_by_name({sentry_unit: ['memcached']})
if ret:
amulet.raise_status(amulet.FAIL, msg='Memcache running check'
'failed {}'.format(ret))
else:
self.log.debug('OK')
self.log.debug('Checking memcache url is configured in {}'.format(
conf))
if self.validate_config_data(sentry_unit, conf, section, _kvs):
message = "Memcache config error in: {}".format(conf)
amulet.raise_status(amulet.FAIL, msg=message)
else:
self.log.debug('OK')
self.log.debug('Checking memcache configuration in '
'/etc/memcached.conf')
contents = self.file_contents_safe(sentry_unit, '/etc/memcached.conf',
fatal=True)
ubuntu_release, _ = self.run_cmd_unit(sentry_unit, 'lsb_release -cs')
if ubuntu_release <= 'trusty':
memcache_listen_addr = 'ip6-localhost'
else:
memcache_listen_addr = '::1'
expected = {
'-p': '11211',
'-l': memcache_listen_addr}
found = []
for key, value in expected.items():
for line in contents.split('\n'):
if line.startswith(key):
self.log.debug('Checking {} is set to {}'.format(
key,
value))
assert value == line.split()[-1]
self.log.debug(line.split()[-1])
found.append(key)
if sorted(found) == sorted(expected.keys()):
self.log.debug('OK')
else:
message = "Memcache config error in: /etc/memcached.conf"
amulet.raise_status(amulet.FAIL, msg=message)

25
hooks/charmhelpers/contrib/openstack/context.py
View File

@ -90,6 +90,7 @@ from charmhelpers.contrib.network.ip import (
from charmhelpers.contrib.openstack.utils import (
config_flags_parser,
get_host_ip,
enable_memcache,
)
from charmhelpers.core.unitdata import kv
@ -1512,3 +1513,27 @@ class AppArmorContext(OSContextGenerator):
"".format(self.ctxt['aa_profile'],
self.ctxt['aa_profile_mode']))
raise e
class MemcacheContext(OSContextGenerator):
"""Memcache context
This context provides options for configuring a local memcache client and
server
"""
def __call__(self):
ctxt = {}
ctxt['use_memcache'] = enable_memcache(config('openstack-origin'))
if ctxt['use_memcache']:
# Trusty version of memcached does not support ::1 as a listen
# address so use host file entry instead
if lsb_release()['DISTRIB_CODENAME'].lower() > 'trusty':
ctxt['memcache_server'] = '::1'
else:
ctxt['memcache_server'] = 'ip6-localhost'
ctxt['memcache_server_formatted'] = '[::1]'
ctxt['memcache_port'] = '11211'
ctxt['memcache_url'] = 'inet6:{}:{}'.format(
ctxt['memcache_server_formatted'],
ctxt['memcache_port'])
return ctxt

53
hooks/charmhelpers/contrib/openstack/templates/memcached.conf Normal file
View File

@ -0,0 +1,53 @@
###############################################################################
# [ WARNING ]
# memcached configuration file maintained by Juju
# local changes may be overwritten.
###############################################################################
# memcached default config file
# 2003 - Jay Bonci <jaybonci@debian.org>
# This configuration file is read by the start-memcached script provided as
# part of the Debian GNU/Linux distribution.
# Run memcached as a daemon. This command is implied, and is not needed for the
# daemon to run. See the README.Debian that comes with this package for more
# information.
-d
# Log memcached's output to /var/log/memcached
logfile /var/log/memcached.log
# Be verbose
# -v
# Be even more verbose (print client commands as well)
# -vv
# Start with a cap of 64 megs of memory. It's reasonable, and the daemon default
# Note that the daemon will grow to this size, but does not start out holding this much
# memory
-m 64
# Default connection port is 11211
-p {{ memcache_port }}
# Run the daemon as root. The start-memcached will default to running as root if no
# -u command is present in this config file
-u memcache
# Specify which IP address to listen on. The default is to listen on all IP addresses
# This parameter is one of the only security measures that memcached has, so make sure
# it's listening on a firewalled interface.
-l {{ memcache_server }}
# Limit the number of simultaneous incoming connections. The daemon default is 1024
# -c 1024
# Lock down all paged memory. Consult with the README and homepage before you do this
# -k
# Return error when memory is exhausted (rather than removing items)
# -M
# Maximize core file limit
# -r

3
hooks/charmhelpers/contrib/openstack/templates/section-keystone-authtoken-mitaka
View File

@ -14,4 +14,7 @@ project_name = {{ admin_tenant_name }}
username = {{ admin_user }}
password = {{ admin_password }}
signing_dir = {{ signing_dir }}
{% if use_memcache == true %}
memcached_servers = {{ memcache_url }}
{% endif -%}
{% endif -%}

25
hooks/charmhelpers/contrib/openstack/utils.py
View File

@ -1925,3 +1925,28 @@ def os_application_version_set(package):
application_version_set(os_release(package))
else:
application_version_set(application_version)
def enable_memcache(source=None, release=None):
"""Determine if memcache should be enabled on the local unit
@param source: source string for charm
@param release: release of OpenStack currently deployed
@returns boolean Whether memcache should be enabled
"""
if not release:
release = get_os_codename_install_source(source)
return release >= 'mitaka'
def token_cache_pkgs(source=None, release=None):
"""Determine additional packages needed for token caching
@param source: source string for charm
@param release: release of OpenStack currently deployed
@returns List of package to enable token caching
"""
packages = []
if enable_memcache(source=source, release=release):
packages.extend(['memcached', 'python-memcache'])
return packages

17
hooks/nova_cc_utils.py
View File

@ -58,6 +58,8 @@ from charmhelpers.contrib.openstack.utils import (
pause_unit,
resume_unit,
os_application_version_set,
token_cache_pkgs,
enable_memcache,
)
from charmhelpers.fetch import (
@ -210,6 +212,7 @@ NOVA_POLICY = '%s/policy.json' % NOVA_CONF_DIR
HAPROXY_CONF = '/etc/haproxy/haproxy.cfg'
APACHE_CONF = '/etc/apache2/sites-available/openstack_https_frontend'
APACHE_24_CONF = '/etc/apache2/sites-available/openstack_https_frontend.conf'
MEMCACHED_CONF = '/etc/memcached.conf'
def resolve_services():
@ -256,7 +259,8 @@ BASE_RESOURCE_MAP = OrderedDict([
nova_cc_context.CloudComputeContext(),
context.InternalEndpointContext(),
nova_cc_context.NeutronAPIContext(),
nova_cc_context.SerialConsoleContext()],
nova_cc_context.SerialConsoleContext(),
context.MemcacheContext()],
}),
(NOVA_API_PASTE, {
'services': [s for s in resolve_services() if 'api' in s],
@ -325,7 +329,8 @@ def resource_map():
resource_map[NOVA_CONF]['contexts'].append(
nova_cc_context.NeutronCCContext())
if os_release('nova-common') >= 'mitaka':
release = os_release('nova-common')
if release >= 'mitaka':
resource_map[NOVA_CONF]['contexts'].append(
nova_cc_context.NovaAPISharedDBContext(relation_prefix='novaapi',
database='nova_api',
@ -339,8 +344,7 @@ def resource_map():
resource_map[NOVA_CONF]['services'] += \
console_attributes('services')
if (config('enable-serial-console') and
os_release('nova-common') >= 'juno'):
if (config('enable-serial-console') and release >= 'juno'):
resource_map[NOVA_CONF]['services'] += \
SERIAL_CONSOLE['services']
@ -354,6 +358,10 @@ def resource_map():
if s not in resource_map[NOVA_CONF]['services']:
resource_map[NOVA_CONF]['services'].append(s)
if enable_memcache(release=release):
resource_map[MEMCACHED_CONF] = {
'contexts': [context.MemcacheContext()],
'services': ['memcached']}
return resource_map
@ -436,6 +444,7 @@ def determine_packages():
if p in packages:
packages.remove(p)
packages.extend(token_cache_pkgs(source=config('openstack-origin')))
return list(set(packages))

6
tests/basic_deployment.py
View File

@ -358,6 +358,12 @@ class NovaCCBasicDeployment(OpenStackAmuletDeployment):
message = 'S3 endpoint: {}'.format(ret)
amulet.raise_status(amulet.FAIL, msg=message)
def test_110_memcache(self):
u.validate_memcache(self.nova_cc_sentry,
'/etc/nova/nova.conf',
self._get_openstack_release(),
earliest_release=self.trusty_mitaka)
def test_200_nova_cc_shared_db_relation(self):
"""Verify the nova-cc to mysql shared-db relation data"""
u.log.debug('Checking n-c-c:mysql db relation data...')

3
tests/charmhelpers/contrib/amulet/utils.py
View File

@ -148,7 +148,8 @@ class AmuletUtils(object):
for service_name in services_list:
if (self.ubuntu_releases.index(release) >= systemd_switch or
service_name in ['rabbitmq-server', 'apache2']):
service_name in ['rabbitmq-server', 'apache2',
'memcached']):
# init is systemd (or regular sysv)
cmd = 'sudo service {} status'.format(service_name)
output, code = sentry_unit.run(cmd)

67
tests/charmhelpers/contrib/openstack/amulet/utils.py
View File

@ -1133,3 +1133,70 @@ class OpenStackAmuletUtils(AmuletUtils):
else:
msg = 'No message retrieved.'
amulet.raise_status(amulet.FAIL, msg)
def validate_memcache(self, sentry_unit, conf, os_release,
earliest_release=5, section='keystone_authtoken',
check_kvs=None):
"""Check Memcache is running and is configured to be used
Example call from Amulet test:
def test_110_memcache(self):
u.validate_memcache(self.neutron_api_sentry,
'/etc/neutron/neutron.conf',
self._get_openstack_release())
:param sentry_unit: sentry unit
:param conf: OpenStack config file to check memcache settings
:param os_release: Current OpenStack release int code
:param earliest_release: Earliest Openstack release to check int code
:param section: OpenStack config file section to check
:param check_kvs: Dict of settings to check in config file
:returns: None
"""
if os_release < earliest_release:
self.log.debug('Skipping memcache checks for deployment. {} <'
'mitaka'.format(os_release))
return
_kvs = check_kvs or {'memcached_servers': 'inet6:[::1]:11211'}
self.log.debug('Checking memcached is running')
ret = self.validate_services_by_name({sentry_unit: ['memcached']})
if ret:
amulet.raise_status(amulet.FAIL, msg='Memcache running check'
'failed {}'.format(ret))
else:
self.log.debug('OK')
self.log.debug('Checking memcache url is configured in {}'.format(
conf))
if self.validate_config_data(sentry_unit, conf, section, _kvs):
message = "Memcache config error in: {}".format(conf)
amulet.raise_status(amulet.FAIL, msg=message)
else:
self.log.debug('OK')
self.log.debug('Checking memcache configuration in '
'/etc/memcached.conf')
contents = self.file_contents_safe(sentry_unit, '/etc/memcached.conf',
fatal=True)
ubuntu_release, _ = self.run_cmd_unit(sentry_unit, 'lsb_release -cs')
if ubuntu_release <= 'trusty':
memcache_listen_addr = 'ip6-localhost'
else:
memcache_listen_addr = '::1'
expected = {
'-p': '11211',
'-l': memcache_listen_addr}
found = []
for key, value in expected.items():
for line in contents.split('\n'):
if line.startswith(key):
self.log.debug('Checking {} is set to {}'.format(
key,
value))
assert value == line.split()[-1]
self.log.debug(line.split()[-1])
found.append(key)
if sorted(found) == sorted(expected.keys()):
self.log.debug('OK')
else:
message = "Memcache config error in: /etc/memcached.conf"
amulet.raise_status(amulet.FAIL, msg=message)

5
unit_tests/test_nova_cc_utils.py
View File

@ -62,6 +62,8 @@ TO_PATCH = [
'local_unit',
'relation_get',
'os_application_version_set',
'token_cache_pkgs',
'enable_memcache',
]
SCRIPTRC_ENV_VARS = {
@ -213,6 +215,7 @@ class NovaCCUtilsTests(CharmTestCase):
_os_release):
_os_release.return_value = 'icehouse'
_exists.return_value = False
self.enable_memcache.return_value = False
self._resource_map()
_map = utils.restart_map()
self.assertIsInstance(_map, OrderedDict)
@ -289,6 +292,8 @@ class NovaCCUtilsTests(CharmTestCase):
git_requested.return_value = False
self.relation_ids.return_value = []
self.os_release.return_value = 'icehouse'
self.token_cache_pkgs.return_value = []
self.enable_memcache.return_value = False
pkgs = utils.determine_packages()
ex = list(set(utils.BASE_PACKAGES + utils.BASE_SERVICES))
self.assertEquals(ex, pkgs)