c-h sync
This commit is contained in:
Billy Olsen
parent
2e2e62bd75
commit
7b2d9c54f0
@ -52,6 +52,8 @@ from charmhelpers.core.strutils import (
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bool_from_string,
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)
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DC_RESOURCE_NAME = 'DC'
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class HAIncompleteConfig(Exception):
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pass
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@ -95,6 +97,27 @@ def is_clustered():
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return False
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def is_crm_dc():
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"""
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Determine leadership by querying the pacemaker Designated Controller
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"""
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cmd = ['crm', 'status']
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try:
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status = subprocess.check_output(cmd, stderr=subprocess.STDOUT)
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if not isinstance(status, six.text_type):
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status = six.text_type(status, "utf-8")
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except subprocess.CalledProcessError:
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return False
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current_dc = ''
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for line in status.split('\n'):
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if line.startswith('Current DC'):
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# Current DC: juju-lytrusty-machine-2 (168108163) - partition with quorum
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current_dc = line.split(':')[1].split()[0]
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if current_dc == get_unit_hostname():
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return True
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return False
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@retry_on_exception(5, base_delay=2, exc_type=CRMResourceNotFound)
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def is_crm_leader(resource, retry=False):
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"""
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@ -104,6 +127,8 @@ def is_crm_leader(resource, retry=False):
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We allow this operation to be retried to avoid the possibility of getting a
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false negative. See LP #1396246 for more info.
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"""
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if resource == DC_RESOURCE_NAME:
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return is_crm_dc()
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cmd = ['crm', 'resource', 'show', resource]
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try:
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status = subprocess.check_output(cmd, stderr=subprocess.STDOUT)
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@ -17,6 +17,7 @@
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from charmhelpers.core.hookenv import (
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config,
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unit_get,
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service_name,
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)
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from charmhelpers.contrib.network.ip import (
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get_address_in_network,
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@ -82,6 +83,26 @@ def _get_scheme(configs):
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return scheme
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def _get_address_override(endpoint_type=PUBLIC):
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"""Returns any address overrides that the user has defined based on the
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endpoint type.
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Note: this function allows for the service name to be inserted into the
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address if the user specifies {service_name}.somehost.org.
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:param endpoint_type: the type of endpoint to retrieve the override
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value for.
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:returns: any endpoint address or hostname that the user has overridden
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or None if an override is not present.
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"""
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override_key = ADDRESS_MAP[endpoint_type]['override']
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addr_override = config(override_key)
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if not addr_override:
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return None
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else:
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return addr_override.format(service_name=service_name())
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def resolve_address(endpoint_type=PUBLIC):
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"""Return unit address depending on net config.
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@ -93,14 +114,9 @@ def resolve_address(endpoint_type=PUBLIC):
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:param endpoint_type: Network endpoing type
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"""
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resolved_address = None
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# Allow the user to override the address which is used. This is
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# useful for proxy services or exposing a public endpoint url, etc.
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override_key = ADDRESS_MAP[endpoint_type]['override']
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addr_override = config(override_key)
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if addr_override:
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return addr_override
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resolved_address = _get_address_override(endpoint_type)
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if resolved_address:
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return resolved_address
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vips = config('vip')
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if vips:
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@ -256,11 +256,14 @@ def network_manager():
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def parse_mappings(mappings):
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parsed = {}
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if mappings:
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mappings = mappings.split(' ')
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mappings = mappings.split()
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for m in mappings:
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p = m.partition(':')
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if p[1] == ':':
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parsed[p[0].strip()] = p[2].strip()
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key = p[0].strip()
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if p[1]:
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parsed[key] = p[2].strip()
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else:
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parsed[key] = ''
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return parsed
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@ -283,13 +286,13 @@ def parse_data_port_mappings(mappings, default_bridge='br-data'):
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Returns dict of the form {bridge:port}.
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"""
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_mappings = parse_mappings(mappings)
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if not _mappings:
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if not _mappings or list(_mappings.values()) == ['']:
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if not mappings:
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return {}
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# For backwards-compatibility we need to support port-only provided in
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# config.
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_mappings = {default_bridge: mappings.split(' ')[0]}
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_mappings = {default_bridge: mappings.split()[0]}
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bridges = _mappings.keys()
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ports = _mappings.values()
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@ -309,6 +312,8 @@ def parse_vlan_range_mappings(mappings):
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Mappings must be a space-delimited list of provider:start:end mappings.
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The start:end range is optional and may be omitted.
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Returns dict of the form {provider: (start, end)}.
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"""
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_mappings = parse_mappings(mappings)
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@ -21,12 +21,14 @@
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# Charm Helpers Developers <juju@lists.ubuntu.com>
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from __future__ import print_function
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from functools import wraps
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import os
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import json
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import yaml
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import subprocess
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import sys
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import errno
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import tempfile
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from subprocess import CalledProcessError
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import six
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@ -58,12 +60,14 @@ def cached(func):
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will cache the result of unit_get + 'test' for future calls.
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"""
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@wraps(func)
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def wrapper(*args, **kwargs):
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global cache
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key = str((func, args, kwargs))
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try:
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return cache[key]
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except KeyError:
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pass # Drop out of the exception handler scope.
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res = func(*args, **kwargs)
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cache[key] = res
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return res
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@ -178,7 +182,7 @@ def local_unit():
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def remote_unit():
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"""The remote unit for the current relation hook"""
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return os.environ['JUJU_REMOTE_UNIT']
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return os.environ.get('JUJU_REMOTE_UNIT', None)
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def service_name():
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@ -250,6 +254,12 @@ class Config(dict):
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except KeyError:
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return (self._prev_dict or {})[key]
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def get(self, key, default=None):
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try:
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return self[key]
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except KeyError:
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return default
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def keys(self):
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prev_keys = []
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if self._prev_dict is not None:
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@ -353,18 +363,49 @@ def relation_set(relation_id=None, relation_settings=None, **kwargs):
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"""Set relation information for the current unit"""
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relation_settings = relation_settings if relation_settings else {}
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relation_cmd_line = ['relation-set']
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accepts_file = "--file" in subprocess.check_output(
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relation_cmd_line + ["--help"], universal_newlines=True)
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if relation_id is not None:
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relation_cmd_line.extend(('-r', relation_id))
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for k, v in (list(relation_settings.items()) + list(kwargs.items())):
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if v is None:
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relation_cmd_line.append('{}='.format(k))
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settings = relation_settings.copy()
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settings.update(kwargs)
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for key, value in settings.items():
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# Force value to be a string: it always should, but some call
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# sites pass in things like dicts or numbers.
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if value is not None:
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settings[key] = "{}".format(value)
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if accepts_file:
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# --file was introduced in Juju 1.23.2. Use it by default if
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# available, since otherwise we'll break if the relation data is
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# too big. Ideally we should tell relation-set to read the data from
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# stdin, but that feature is broken in 1.23.2: Bug #1454678.
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with tempfile.NamedTemporaryFile(delete=False) as settings_file:
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settings_file.write(yaml.safe_dump(settings).encode("utf-8"))
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subprocess.check_call(
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relation_cmd_line + ["--file", settings_file.name])
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os.remove(settings_file.name)
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else:
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relation_cmd_line.append('{}={}'.format(k, v))
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for key, value in settings.items():
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if value is None:
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relation_cmd_line.append('{}='.format(key))
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else:
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relation_cmd_line.append('{}={}'.format(key, value))
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subprocess.check_call(relation_cmd_line)
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# Flush cache of any relation-gets for local unit
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flush(local_unit())
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def relation_clear(r_id=None):
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''' Clears any relation data already set on relation r_id '''
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settings = relation_get(rid=r_id,
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unit=local_unit())
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for setting in settings:
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if setting not in ['public-address', 'private-address']:
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settings[setting] = None
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relation_set(relation_id=r_id,
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**settings)
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@cached
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def relation_ids(reltype=None):
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"""A list of relation_ids"""
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@ -509,6 +550,11 @@ def unit_get(attribute):
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return None
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def unit_public_ip():
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"""Get this unit's public IP address"""
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return unit_get('public-address')
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def unit_private_ip():
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"""Get this unit's private IP address"""
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return unit_get('private-address')
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@ -605,3 +651,94 @@ def action_fail(message):
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The results set by action_set are preserved."""
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subprocess.check_call(['action-fail', message])
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def status_set(workload_state, message):
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"""Set the workload state with a message
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Use status-set to set the workload state with a message which is visible
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to the user via juju status. If the status-set command is not found then
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assume this is juju < 1.23 and juju-log the message unstead.
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workload_state -- valid juju workload state.
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message -- status update message
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"""
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valid_states = ['maintenance', 'blocked', 'waiting', 'active']
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if workload_state not in valid_states:
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raise ValueError(
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'{!r} is not a valid workload state'.format(workload_state)
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)
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cmd = ['status-set', workload_state, message]
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try:
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ret = subprocess.call(cmd)
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if ret == 0:
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return
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except OSError as e:
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if e.errno != errno.ENOENT:
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raise
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log_message = 'status-set failed: {} {}'.format(workload_state,
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message)
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log(log_message, level='INFO')
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def status_get():
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"""Retrieve the previously set juju workload state
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If the status-set command is not found then assume this is juju < 1.23 and
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return 'unknown'
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"""
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cmd = ['status-get']
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try:
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raw_status = subprocess.check_output(cmd, universal_newlines=True)
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status = raw_status.rstrip()
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return status
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except OSError as e:
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if e.errno == errno.ENOENT:
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return 'unknown'
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else:
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raise
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def translate_exc(from_exc, to_exc):
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def inner_translate_exc1(f):
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def inner_translate_exc2(*args, **kwargs):
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try:
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return f(*args, **kwargs)
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except from_exc:
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raise to_exc
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return inner_translate_exc2
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return inner_translate_exc1
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@translate_exc(from_exc=OSError, to_exc=NotImplementedError)
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def is_leader():
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"""Does the current unit hold the juju leadership
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Uses juju to determine whether the current unit is the leader of its peers
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"""
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cmd = ['is-leader', '--format=json']
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return json.loads(subprocess.check_output(cmd).decode('UTF-8'))
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@translate_exc(from_exc=OSError, to_exc=NotImplementedError)
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def leader_get(attribute=None):
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"""Juju leader get value(s)"""
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cmd = ['leader-get', '--format=json'] + [attribute or '-']
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return json.loads(subprocess.check_output(cmd).decode('UTF-8'))
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@translate_exc(from_exc=OSError, to_exc=NotImplementedError)
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def leader_set(settings=None, **kwargs):
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"""Juju leader set value(s)"""
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log("Juju leader-set '%s'" % (settings), level=DEBUG)
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cmd = ['leader-set']
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settings = settings or {}
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settings.update(kwargs)
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for k, v in settings.iteritems():
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if v is None:
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cmd.append('{}='.format(k))
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else:
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cmd.append('{}={}'.format(k, v))
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subprocess.check_call(cmd)
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@ -90,7 +90,7 @@ def service_available(service_name):
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['service', service_name, 'status'],
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stderr=subprocess.STDOUT).decode('UTF-8')
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except subprocess.CalledProcessError as e:
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return 'unrecognized service' not in e.output
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return b'unrecognized service' not in e.output
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else:
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return True
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@ -15,9 +15,9 @@
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# along with charm-helpers. If not, see <http://www.gnu.org/licenses/>.
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import os
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import re
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import json
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from collections import Iterable
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from inspect import getargspec
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from collections import Iterable, OrderedDict
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from charmhelpers.core import host
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from charmhelpers.core import hookenv
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@ -119,7 +119,7 @@ class ServiceManager(object):
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"""
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self._ready_file = os.path.join(hookenv.charm_dir(), 'READY-SERVICES.json')
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self._ready = None
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self.services = {}
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self.services = OrderedDict()
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for service in services or []:
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service_name = service['service']
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self.services[service_name] = service
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@ -132,8 +132,8 @@ class ServiceManager(object):
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if hook_name == 'stop':
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self.stop_services()
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else:
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self.provide_data()
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self.reconfigure_services()
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self.provide_data()
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cfg = hookenv.config()
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if cfg.implicit_save:
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cfg.save()
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@ -145,15 +145,36 @@ class ServiceManager(object):
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A provider must have a `name` attribute, which indicates which relation
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to set data on, and a `provide_data()` method, which returns a dict of
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data to set.
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The `provide_data()` method can optionally accept two parameters:
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* ``remote_service`` The name of the remote service that the data will
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be provided to. The `provide_data()` method will be called once
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for each connected service (not unit). This allows the method to
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tailor its data to the given service.
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* ``service_ready`` Whether or not the service definition had all of
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its requirements met, and thus the ``data_ready`` callbacks run.
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Note that the ``provided_data`` methods are now called **after** the
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``data_ready`` callbacks are run. This gives the ``data_ready`` callbacks
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a chance to generate any data necessary for the providing to the remote
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services.
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"""
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hook_name = hookenv.hook_name()
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for service in self.services.values():
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for service_name, service in self.services.items():
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service_ready = self.is_ready(service_name)
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for provider in service.get('provided_data', []):
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if re.match(r'{}-relation-(joined|changed)'.format(provider.name), hook_name):
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for relid in hookenv.relation_ids(provider.name):
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units = hookenv.related_units(relid)
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if not units:
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continue
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remote_service = units[0].split('/')[0]
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argspec = getargspec(provider.provide_data)
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if len(argspec.args) > 1:
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data = provider.provide_data(remote_service, service_ready)
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else:
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data = provider.provide_data()
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_ready = provider._is_ready(data) if hasattr(provider, '_is_ready') else data
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if _ready:
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hookenv.relation_set(None, data)
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if data:
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hookenv.relation_set(relid, data)
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def reconfigure_services(self, *service_names):
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"""
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@ -158,7 +158,7 @@ def filter_installed_packages(packages):
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def apt_cache(in_memory=True):
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"""Build and return an apt cache"""
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import apt_pkg
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from apt import apt_pkg
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apt_pkg.init()
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if in_memory:
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apt_pkg.config.set("Dir::Cache::pkgcache", "")
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