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docker_container: fix various idempotency problems and non-working options (#45905)

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* Sorting args.

* Doing comparisons of options with container parameters in a more context-sensitive way.

This prevents unnecessary restarts, or missing restarts (f.ex. if parameters are removed from ``cmd``).

* Make blkio_weight work.

* Fix cap_drop idempotency problem.

* Making groups idempotent if it contains integers.

* Make cpuset_mems work.

* Make dns_opts work.

* Fixing log_opts: docker expects string values, returns error for integer.

* Adding tests from felixfontein/ansible-docker_container-test#2.

* Make uts work.

* Adding changelog entry.

* Forgot option security_opts.

* Fixing typo.

* Explain strict set(dict) comparison a bit more.

* Improving idempotency tests.

* Making dns_servers a list, since the ordering is relevant.

* Making dns_search_domains a list, since the ordering is relevant.

* Improving dns_search_domains/dns_servers.

* Fixing entrypoint test.

* Making sure options are only supported for correct docker-py versions.
pull/46146/head
Felix Fontein 6 years ago committed by Matt Clay
parent e7740b80fd
commit 85626291bf
2 changed files with 213 additions and 83 deletions
Show Stats Download Patch File Download Diff File

7
changelogs/fragments/docker_container-idempotency.yaml
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@ -0,0 +1,7 @@
bugfixes:
- "docker_container - Makes ``blkio_weight``, ``cpuset_mems``, ``dns_opts`` and ``uts`` options actually work."
- "docker_container - Fix idempotency problems with ``cap_drop`` and ``groups`` (when numeric group IDs were used)."
- "docker_container - Fix type conversion errors for ``log_options``."
- "docker_container - Fixing various comparison/idempotency problems related to wrong comparisons.
In particular, comparisons for ``command`` and ``entrypoint`` (both lists) no longer ignore missing
elements during idempotency checks."

275
lib/ansible/modules/cloud/docker/docker_container.py
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@ -729,6 +729,12 @@ class TaskParameters(DockerBaseClass):
for key, value in client.module.params.items():
setattr(self, key, value)
self.comparisons = client.comparisons
if self.groups:
# In case integers are passed as groups, we need to convert them to
# strings as docker internally treats them as strings.
self.groups = [str(g) for g in self.groups]
# If state is 'absent', parameters do not have to be parsed or interpreted.
# Only the container's name is needed.
@ -803,7 +809,6 @@ class TaskParameters(DockerBaseClass):
'''
update_parameters = dict(
blkio_weight='blkio_weight',
cpu_period='cpu_period',
cpu_quota='cpu_quota',
cpu_shares='cpu_shares',
@ -813,6 +818,15 @@ class TaskParameters(DockerBaseClass):
memswap_limit='memory_swap',
kernel_memory='kernel_memory',
)
if self.client.HAS_BLKIO_WEIGHT_OPT:
# blkio_weight is only supported in docker>=1.9
update_parameters['blkio_weight'] = 'blkio_weight'
if self.client.HAS_CPUSET_MEMS_OPT:
# cpuset_mems is only supported in docker>=2.3
update_parameters['cpuset_mems'] = 'cpuset_mems'
result = dict()
for key, value in update_parameters.items():
if getattr(self, value, None) is not None:
@ -909,6 +923,7 @@ class TaskParameters(DockerBaseClass):
links='links',
privileged='privileged',
dns='dns_servers',
dns_opt='dns_opts',
dns_search='dns_search_domains',
binds='volume_binds',
volumes_from='volumes_from',
@ -938,6 +953,10 @@ class TaskParameters(DockerBaseClass):
# auto_remove is only supported in docker>=2
host_config_params['auto_remove'] = 'auto_remove'
if self.client.HAS_BLKIO_WEIGHT_OPT:
# blkio_weight is only supported in docker>=1.9
host_config_params['blkio_weight'] = 'blkio_weight'
if HAS_DOCKER_PY_3:
# cpu_shares and volume_driver moved to create_host_config in > 3
host_config_params['cpu_shares'] = 'cpu_shares'
@ -946,6 +965,9 @@ class TaskParameters(DockerBaseClass):
if self.client.HAS_INIT_OPT:
host_config_params['init'] = 'init'
if self.client.HAS_UTS_MODE_OPT:
host_config_params['uts_mode'] = 'uts'
params = dict()
for key, value in host_config_params.items():
if getattr(self, value, None) is not None:
@ -1127,7 +1149,9 @@ class TaskParameters(DockerBaseClass):
)
if self.log_options is not None:
options['Config'] = self.log_options
options['Config'] = dict()
for k, v in self.log_options.items():
options['Config'][k] = str(v)
try:
return LogConfig(**options)
@ -1197,6 +1221,19 @@ class Container(DockerBaseClass):
self.parameters.expected_sysctls = None
self.parameters.expected_etc_hosts = None
self.parameters.expected_env = None
self.parameters_map = dict()
self.parameters_map['expected_links'] = 'links'
self.parameters_map['expected_ports'] = 'published_ports'
self.parameters_map['expected_exposed'] = 'exposed_ports'
self.parameters_map['expected_volumes'] = 'volumes'
self.parameters_map['expected_ulimits'] = 'ulimits'
self.parameters_map['expected_sysctls'] = 'sysctls'
self.parameters_map['expected_etc_hosts'] = 'etc_hosts'
self.parameters_map['expected_env'] = 'env'
self.parameters_map['expected_entrypoint'] = 'entrypoint'
self.parameters_map['expected_binds'] = 'volumes'
self.parameters_map['expected_cmd'] = 'command'
self.parameters_map['expected_devices'] = 'devices'
def fail(self, msg):
self.parameters.client.module.fail_json(msg=msg)
@ -1212,6 +1249,80 @@ class Container(DockerBaseClass):
return True
return False
def _compare_dict_allow_more_present(self, av, bv):
'''
Compare two dictionaries for whether every entry of the first is in the second.
'''
for key, value in av.items():
if key not in bv:
return False
if bv[key] != value:
return False
return True
def _compare(self, a, b, compare):
'''
Compare values a and b as described in compare.
'''
method = compare['comparison']
if method == 'ignore':
return True
# If a or b is None:
if a is None or b is None:
# If both are None: equality
if a == b:
return True
# Otherwise, not equal for values, and equal
# if the other is empty for set/list/dict
if compare['type'] == 'value':
return False
return len(b if a is None else a) == 0
# Do proper comparison (both objects not None)
if compare['type'] == 'value':
return a == b
elif compare['type'] == 'list':
if method == 'strict':
return a == b
else:
set_a = set(a)
set_b = set(b)
return set_b >= set_a
elif compare['type'] == 'dict':
if method == 'strict':
return a == b
else:
return self._compare_dict_allow_more_present(a, b)
elif compare['type'] == 'set':
set_a = set(a)
set_b = set(b)
if method == 'strict':
return set_a == set_b
else:
return set_b >= set_a
elif compare['type'] == 'set(dict)':
for av in a:
found = False
for bv in b:
if self._compare_dict_allow_more_present(av, bv):
found = True
break
if not found:
return False
if method == 'strict':
# If we would know that both a and b do not contain duplicates,
# we could simply compare len(a) to len(b) to finish this test.
# We can assume that b has no duplicates (as it is returned by
# docker), but we don't know for a.
for bv in b:
found = False
for av in a:
if self._compare_dict_allow_more_present(av, bv):
found = True
break
if not found:
return False
return True
def has_different_configuration(self, image):
'''
Diff parameters vs existing container config. Returns tuple: (True | False, List of differences)
@ -1315,36 +1426,10 @@ class Container(DockerBaseClass):
differences = []
for key, value in config_mapping.items():
self.log('check differences %s %s vs %s' % (key, getattr(self.parameters, key), str(value)))
compare = self.parameters.client.comparisons[self.parameters_map.get(key, key)]
self.log('check differences %s %s vs %s (%s)' % (key, getattr(self.parameters, key), str(value), compare))
if getattr(self.parameters, key, None) is not None:
if isinstance(getattr(self.parameters, key), list) and isinstance(value, list):
if len(getattr(self.parameters, key)) > 0 and isinstance(getattr(self.parameters, key)[0], dict):
# compare list of dictionaries
self.log("comparing list of dict: %s" % key)
match = self._compare_dictionary_lists(getattr(self.parameters, key), value)
else:
# compare two lists. Is list_a in list_b?
self.log("comparing lists: %s" % key)
set_a = set(getattr(self.parameters, key))
set_b = set(value)
match = (set_b >= set_a)
elif isinstance(getattr(self.parameters, key), list) and not len(getattr(self.parameters, key)) \
and value is None:
# an empty list and None are ==
continue
elif isinstance(getattr(self.parameters, key), dict) and isinstance(value, dict):
# compare two dicts
self.log("comparing two dicts: %s" % key)
match = self._compare_dicts(getattr(self.parameters, key), value)
elif isinstance(getattr(self.parameters, key), dict) and \
not len(list(getattr(self.parameters, key).keys())) and value is None:
# an empty dict and None are ==
continue
else:
# primitive compare
self.log("primitive compare: %s" % key)
match = (getattr(self.parameters, key) == value)
match = self._compare(getattr(self.parameters, key), value, compare)
if not match:
# no match. record the differences
@ -1358,43 +1443,6 @@ class Container(DockerBaseClass):
has_differences = True if len(differences) > 0 else False
return has_differences, differences
def _compare_dictionary_lists(self, list_a, list_b):
'''
If all of list_a exists in list_b, return True
'''
if not isinstance(list_a, list) or not isinstance(list_b, list):
return False
matches = 0
for dict_a in list_a:
for dict_b in list_b:
if self._compare_dicts(dict_a, dict_b):
matches += 1
break
result = (matches == len(list_a))
return result
def _compare_dicts(self, dict_a, dict_b):
'''
If dict_a in dict_b, return True
'''
if not isinstance(dict_a, dict) or not isinstance(dict_b, dict):
return False
for key, value in dict_a.items():
if isinstance(value, dict):
match = self._compare_dicts(value, dict_b.get(key))
elif isinstance(value, list):
if len(value) > 0 and isinstance(value[0], dict):
match = self._compare_dictionary_lists(value, dict_b.get(key))
else:
set_a = set(value)
set_b = set(dict_b.get(key))
match = (set_a == set_b)
else:
match = (value == dict_b.get(key))
if not match:
return False
return True
def has_different_resource_limits(self):
'''
Diff parameters and container resource limits
@ -1408,7 +1456,6 @@ class Container(DockerBaseClass):
cpu_period=host_config.get('CpuPeriod'),
cpu_quota=host_config.get('CpuQuota'),
cpuset_cpus=host_config.get('CpusetCpus'),
cpuset_mems=host_config.get('CpusetMems'),
kernel_memory=host_config.get("KernelMemory"),
memory=host_config.get('Memory'),
memory_reservation=host_config.get('MemoryReservation'),
@ -1417,13 +1464,25 @@ class Container(DockerBaseClass):
oom_killer=host_config.get('OomKillDisable'),
)
if self.parameters.client.HAS_BLKIO_WEIGHT_OPT:
# blkio_weight is only supported in docker>=1.9
config_mapping['blkio_weight'] = host_config.get('BlkioWeight')
if self.parameters.client.HAS_CPUSET_MEMS_OPT:
# cpuset_mems is only supported in docker>=2.3
config_mapping['cpuset_mems'] = host_config.get('CpusetMems')
if HAS_DOCKER_PY_3:
# cpu_shares moved to create_host_config in > 3
config_mapping['cpu_shares'] = host_config.get('CpuShares')
differences = []
for key, value in config_mapping.items():
if getattr(self.parameters, key, None) and getattr(self.parameters, key) != value:
if getattr(self.parameters, key, None):
compare = self.parameters.client.comparisons[self.parameters_map.get(key, key)]
match = self._compare(getattr(self.parameters, key), value, compare)
if not match:
# no match. record the differences
item = dict()
item[key] = dict(
@ -1770,7 +1829,7 @@ class ContainerManager(DockerBaseClass):
# Existing container
different, differences = container.has_different_configuration(image)
image_different = False
if not self.parameters.ignore_image:
if self.parameters.comparisons['image']['comparison'] == 'strict':
image_different = self._image_is_different(image, container)
if image_different or different or self.parameters.recreate:
self.diff['differences'] = differences
@ -2025,6 +2084,51 @@ class ContainerManager(DockerBaseClass):
class AnsibleDockerClientContainer(AnsibleDockerClient):
def _setup_comparisons(self):
comparisons = {}
comp_aliases = {}
# Put in defaults
explicit_types = dict(
command='list',
devices='set(dict)',
dns_search_domains='list',
dns_servers='list',
env='set',
entrypoint='list',
etc_hosts='set',
ulimits='set(dict)',
)
for option, data in self.module.argument_spec.items():
# Ignore options which aren't used as container properties
if option in ('docker_host', 'tls_hostname', 'api_version', 'timeout', 'cacert_path', 'cert_path',
'key_path', 'ssl_version', 'tls', 'tls_verify', 'debug', 'env_file', 'force_kill',
'keep_volumes', 'ignore_image', 'name', 'pull', 'purge_networks', 'recreate',
'restart', 'state', 'stop_timeout', 'trust_image_content', 'networks'):
continue
# Determine option type
if option in explicit_types:
type = explicit_types[option]
elif data['type'] == 'list':
type = 'set'
elif data['type'] == 'dict':
type = 'dict'
else:
type = 'value'
# Determine comparison type
if type in ('list', 'value'):
comparison = 'strict'
else:
comparison = 'allow_more_present'
comparisons[option] = dict(type=type, comparison=comparison, name=option)
# Keep track of aliases
comp_aliases[option] = option
for alias in data.get('aliases', []):
comp_aliases[alias] = option
# Process legacy ignore options
if self.module.params['ignore_image']:
comparisons['image']['comparison'] = 'ignore'
self.comparisons = comparisons
def __init__(self, **kwargs):
super(AnsibleDockerClientContainer, self).__init__(**kwargs)
@ -2038,11 +2142,30 @@ class AnsibleDockerClientContainer(AnsibleDockerClient):
self.fail("docker or docker-py version is %s. Minimum version required is 2.2 to set init option. "
"If you use the 'docker-py' module, you have to switch to the docker 'Python' package." % (docker_version,))
uts_mode_supported = LooseVersion(docker_version) >= LooseVersion('3.5')
if self.module.params.get("uts") is not None and not uts_mode_supported:
self.fail("docker or docker-py version is %s. Minimum version required is 3.5 to set uts option. "
"If you use the 'docker-py' module, you have to switch to the docker 'Python' package." % (docker_version,))
blkio_weight_supported = LooseVersion(docker_version) >= LooseVersion('1.9')
if self.module.params.get("blkio_weight") is not None and not blkio_weight_supported:
self.fail("docker or docker-py version is %s. Minimum version required is 1.9 to set blkio_weight option.")
cpuset_mems_supported = LooseVersion(docker_version) >= LooseVersion('2.3')
if self.module.params.get("cpuset_mems") is not None and not cpuset_mems_supported:
self.fail("docker or docker-py version is %s. Minimum version required is 2.3 to set cpuset_mems option. "
"If you use the 'docker-py' module, you have to switch to the docker 'Python' package." % (docker_version,))
self.HAS_INIT_OPT = init_supported
self.HAS_UTS_MODE_OPT = uts_mode_supported
self.HAS_BLKIO_WEIGHT_OPT = blkio_weight_supported
self.HAS_CPUSET_MEMS_OPT = cpuset_mems_supported
self.HAS_AUTO_REMOVE_OPT = HAS_DOCKER_PY_2 or HAS_DOCKER_PY_3
if self.module.params.get('auto_remove') and not self.HAS_AUTO_REMOVE_OPT:
self.fail("'auto_remove' is not compatible with the 'docker-py' Python package. It requires the newer 'docker' Python package.")
self._setup_comparisons()
def main():
argument_spec = dict(
@ -2062,9 +2185,9 @@ def main():
dns_opts=dict(type='list'),
dns_search_domains=dict(type='list'),
domainname=dict(type='str'),
entrypoint=dict(type='list'),
env=dict(type='dict'),
env_file=dict(type='path'),
entrypoint=dict(type='list'),
etc_hosts=dict(type='dict'),
exposed_ports=dict(type='list', aliases=['exposed', 'expose']),
force_kill=dict(type='bool', default=False, aliases=['forcekill']),
@ -2089,7 +2212,6 @@ def main():
memory_swappiness=dict(type='int'),
name=dict(type='str', required=True),
network_mode=dict(type='str'),
userns_mode=dict(type='str'),
networks=dict(type='list'),
oom_killer=dict(type='bool'),
oom_score_adj=dict(type='int'),
@ -2104,21 +2226,22 @@ def main():
restart=dict(type='bool', default=False),
restart_policy=dict(type='str', choices=['no', 'on-failure', 'always', 'unless-stopped']),
restart_retries=dict(type='int', default=None),
shm_size=dict(type='str'),
security_opts=dict(type='list'),
shm_size=dict(type='str'),
state=dict(type='str', choices=['absent', 'present', 'started', 'stopped'], default='started'),
stop_signal=dict(type='str'),
stop_timeout=dict(type='int'),
sysctls=dict(type='dict'),
tmpfs=dict(type='list'),
trust_image_content=dict(type='bool', default=False),
tty=dict(type='bool', default=False),
ulimits=dict(type='list'),
sysctls=dict(type='dict'),
user=dict(type='str'),
userns_mode=dict(type='str'),
uts=dict(type='str'),
volume_driver=dict(type='str'),
volumes=dict(type='list'),
volumes_from=dict(type='list'),
volume_driver=dict(type='str'),
working_dir=dict(type='str'),
)

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