/usr/lib/python2.7/dist-packages/deployer/deployment.py is in juju-deployer 0.6.4-0ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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import logging
import pprint
import os
import yaml
from .charm import Charm
from .feedback import Feedback
from .service import Service, ServiceUnitPlacementV3, ServiceUnitPlacementV4
from .relation import Endpoint
from .utils import path_join, yaml_dump, ErrorExit, resolve_include, x_in_y
class Deployment(object):
log = logging.getLogger("deployer.deploy")
def __init__(self, name, data, include_dirs, repo_path="", version=3):
self.name = name
self.data = data
self.include_dirs = include_dirs
self.repo_path = repo_path
self.version = version
self.machines = {}
@property
def series(self):
# Series could use a little help, charm series should be inferred
# directly from a store url
return self.data.get('series', 'precise')
@property
def series_path(self):
return path_join(self.repo_path, self.series)
def pretty_print(self):
pprint.pprint(self.data)
def get_service(self, name):
if name not in self.data['services']:
return
return Service(name, self.data['services'][name])
def get_services(self):
services = []
for name, svc_data in self.data.get('services', {}).items():
services.append(Service(name, svc_data))
if self.version == 3:
# Sort unplaced units first, then sort by name for placed units.
services.sort(key=lambda svc: (bool(svc.unit_placement), svc.name))
else:
services.sort(self._machines_placement_sort)
return services
def set_machines(self, machines):
"""Set a dict of machines, mapping from the names in the machine spec
to the machine names in the environment status.
"""
self.machines = machines
def get_machine(self, id):
"""Return a dict containing machine options
None is returned if the machine doesn't exists in
the bundle YAML."""
return self.get_machines().get(id, None)
def get_machines(self):
"""Return a dict mapping machine names to machine options.
An empty dict is returned if no machines are defined in the
bundle YAML.
"""
machines = {}
for key, machine in self.data.get('machines', {}).items():
machines[str(key)] = machine
return machines
def get_service_names(self):
"""Return a sequence of service names for this deployment."""
return self.data.get('services', {}).keys()
@staticmethod
def _machines_placement_sort(svc_a, svc_b):
"""Sort machines with machine placement in mind.
If svc_a is colocated alongside svc_b, svc_b needs to be deployed
first, so that it exists by the time svc_a is deployed, and vice
versa; this sorts first based on this fact, then secondly based on
whether or not the service has a unit placement, and then finally
based on the name of the service.
"""
if svc_a.unit_placement:
if svc_b.unit_placement:
# Check for colocation. This naively assumes that there is no
# circularity in placements.
if x_in_y(svc_b, svc_a):
return 1
if x_in_y(svc_a, svc_b):
return -1
# If no colocation exists, simply compare names.
return cmp(svc_a.name, svc_b.name)
return 1
if svc_b.unit_placement:
return -1
return cmp(svc_a.name, svc_b.name)
def get_unit_placement(self, svc, status):
if isinstance(svc, (str, unicode)):
svc = self.get_service(svc)
if self.version == 3:
return ServiceUnitPlacementV3(svc, self, status)
else:
return ServiceUnitPlacementV4(svc, self, status,
machines_map=self.machines)
def get_relations(self):
if 'relations' not in self.data:
return
# Strip duplicate rels
seen = set()
def check(a, b):
k = tuple(sorted([a, b]))
if k in seen:
#self.log.warning(" Skipping duplicate relation %r" % (k,))
return
seen.add(k)
return True
# Support an ordered list of [endpoints]
if isinstance(self.data['relations'], list):
for end_a, end_b in self.data['relations']:
# Allow shorthand of [end_a, [end_b, end_c]]
if isinstance(end_b, list):
for eb in end_b:
if check(end_a, eb):
yield (end_a, eb)
else:
if check(end_a, end_b):
yield (end_a, end_b)
return
# Legacy format (dictionary of dictionaries with weights)
rels = {}
for k, v in self.data['relations'].items():
expanded = []
for c in v['consumes']:
expanded.append((k, c))
by_weight = rels.setdefault(v.get('weight', 0), [])
by_weight.extend(expanded)
for k in sorted(rels, reverse=True):
for r in rels[k]:
if check(*r):
yield r
#self.log.debug(
# "Found relations %s\n %s" % (" ".join(map(str, seen))))
def get_charms(self):
for k, v in self.data.get('services', {}).items():
yield Charm.from_service(k, self.repo_path, self.series, v)
def get_charm_for(self, svc_name):
svc_data = self.data['services'][svc_name]
return Charm.from_service(
svc_name, self.repo_path, self.series, svc_data)
def fetch_charms(self, update=False, no_local_mods=False):
for charm in self.get_charms():
if charm.is_local():
if charm.exists():
if no_local_mods and charm.is_modified():
self.log.warning(
"Charm %r has local modifications",
charm.path)
raise ErrorExit()
if charm.rev or update:
if charm.rev and charm.is_modified():
self.log.warning((
"Charm %r with pinned revision has"
" local modifications"), charm.path)
raise ErrorExit()
charm.update(build=True)
continue
elif not os.path.exists(charm.series_path):
os.mkdir(charm.series_path)
charm.fetch()
def resolve(self, cli_overides=()):
# Once we have charms definitions available, we can do verification
# of config options.
self.load_overrides(cli_overides)
self.resolve_config()
self.validate_relations()
self.validate_placement()
def load_overrides(self, cli_overrides=()):
"""Load overrides."""
overrides = {}
overrides.update(self.data.get('overrides', {}))
for o in cli_overrides:
key, value = o.split('=', 1)
overrides[key] = value
for k, v in overrides.iteritems():
found = False
for svc_name, svc_data in self.data['services'].items():
charm = self.get_charm_for(svc_name)
if k in charm.config:
if not svc_data.get('options'):
svc_data['options'] = {}
svc_data['options'][k] = v
found = True
if not found:
self.log.warning(
"Override %s does not match any charms", k)
def resolve_config(self):
"""Load any lazy config values (includes), and verify config options.
"""
self.log.debug("Resolving configuration")
# XXX TODO, rename resolve, validate relations
# against defined services
feedback = Feedback()
for svc_name, svc_data in self.data.get('services', {}).items():
if not 'options' in svc_data:
continue
charm = self.get_charm_for(svc_name)
config = charm.config
options = {}
svc_options = svc_data.get('options', {})
if svc_options is None:
svc_options = {}
for k, v in svc_options.items():
if not k in config:
feedback.error(
"Invalid config charm %s %s=%s" % (charm.name, k, v))
continue
iv = self._resolve_include(svc_name, k, v)
if isinstance(iv, Feedback):
feedback.extend(iv)
continue
if iv is not None:
v = iv
options[k] = v
svc_data['options'] = options
self._handle_feedback(feedback)
def _resolve_include(self, svc_name, k, v):
feedback = Feedback()
for include_type in ["file", "base64"]:
if (not isinstance(v, basestring)
or not v.startswith(
"include-%s://" % include_type)):
continue
include, fname = v.split("://", 1)
ip = resolve_include(fname, self.include_dirs)
if ip is None:
feedback.error(
"Invalid config %s.%s include not found %s" % (
svc_name, k, v))
continue
with open(ip) as fh:
v = fh.read()
if include_type == "base64":
v = b64encode(v)
return v
if feedback:
return feedback
def validate_relations(self):
# Could extend to do interface matching against charms.
services = dict([(s.name, s) for s in self.get_services()])
feedback = Feedback()
for e_a, e_b in self.get_relations():
for ep in [Endpoint(e_a), Endpoint(e_b)]:
if not ep.service in services:
feedback.error(
("Invalid relation in config,"
" service %s not found, rel %s") % (
ep.service, "%s <-> %s" % (e_a, e_b)))
continue
self._handle_feedback(feedback)
def validate_placement(self):
services = dict([(s.name, s) for s in self.get_services()])
feedback = Feedback()
for name, s in services.items():
placement = self.get_unit_placement(s, {})
feedback.extend(placement.validate())
self._handle_feedback(feedback)
def _handle_feedback(self, feedback):
for e in feedback.get_errors():
self.log.error(e)
for w in feedback.get_warnings():
self.log.warning(w)
if feedback.has_errors:
raise ErrorExit()
def save(self, path):
with open(path, "w") as fh:
fh.write(yaml_dump(self.data))
@staticmethod
def to_yaml(dumper, deployment):
return dumper.represent_dict(deployment.data)
yaml.add_representer(Deployment, Deployment.to_yaml)
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