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import abc
import copy
import logging
import sys
from datetime import datetime
from typing import Any, Dict, List, Optional, Set, Tuple, Type, Union
from uaclient import (
apt,
config,
contract,
event_logger,
exceptions,
http,
messages,
snap,
system,
util,
)
from uaclient.api.u.pro.status.is_attached.v1 import _is_attached
from uaclient.entitlements.entitlement_status import (
ApplicabilityStatus,
ApplicationStatus,
CanDisableFailure,
CanDisableFailureReason,
CanEnableFailure,
CanEnableFailureReason,
ContractStatus,
UserFacingStatus,
)
from uaclient.types import MessagingOperationsDict, StaticAffordance
from uaclient.util import is_config_value_true
event = event_logger.get_event_logger()
LOG = logging.getLogger(util.replace_top_level_logger_name(__name__))
class IncompatibleService:
def __init__(
self,
entitlement: Type["UAEntitlement"],
named_msg: messages.NamedMessage,
):
self.entitlement = entitlement
self.named_msg = named_msg
class UAEntitlement(metaclass=abc.ABCMeta):
# Optional URL for top-level product service information
help_doc_url = None # type: str
# Whether to assume yes to any messaging prompts
assume_yes = False
# Whether that entitlement is in beta stage
is_beta = False
# Whether the entitlement supports the --access-only flag
supports_access_only = False
# Whether the entitlement supports the --purge flag
supports_purge = False
# Help text for the entitlement
help_text = ""
# List of services that are incompatible with this service
_incompatible_services = () # type: Tuple[IncompatibleService, ...]
# List of services that must be active before enabling this service
_required_services = () # type: Tuple[Type[UAEntitlement], ...]
# List of services that depend on this service
_dependent_services = () # type: Tuple[Type[UAEntitlement], ...]
affordance_check_arch = True
affordance_check_series = True
affordance_check_kernel_min_version = True
affordance_check_kernel_flavor = True
# Determine if the service is a variant of an existing service
is_variant = False
@property
@abc.abstractmethod
def name(self) -> str:
"""The lowercase name of this entitlement"""
pass
@property
def variant_name(self) -> str:
"""The lowercase name of this entitlement, in case it is a variant"""
return ""
@property
def valid_names(self) -> List[str]:
"""The list of names this entitlement may be called."""
valid_names = [self.name]
if self.presentation_name != self.name:
valid_names.append(self.presentation_name)
return valid_names
@property
@abc.abstractmethod
def title(self) -> str:
"""The human readable title of this entitlement"""
pass
@property
@abc.abstractmethod
def description(self) -> str:
"""A sentence describing this entitlement"""
pass
@property
def presentation_name(self) -> str:
"""The user-facing name shown for this entitlement"""
if self.is_variant:
return self.variant_name
elif self.cfg.machine_token_file.is_present:
return (
self.entitlement_cfg.get("entitlement", {})
.get("affordances", {})
.get("presentedAs", self.name)
)
else:
return self.name
def verify_platform_checks(
self, platform_check: Dict[str, Any]
) -> Tuple[bool, Optional[messages.NamedMessage]]:
"""Verify specific platform checks for a service.
This should only be used if the service requires custom platform checks
to check if it is available or not in the machine.
"""
return True, None
@property
def help_info(self) -> str:
"""Help information for the entitlement"""
help_text = self.help_text
if self.variants:
variant_items = [
" * {}: {}".format(variant_name, variant_cls.description)
for variant_name, variant_cls in self.variants.items()
]
variant_text = "\n".join(
["\n\n" + messages.CLI_HELP_VARIANTS_HEADER + "\n"]
+ variant_items
)
help_text += variant_text
return help_text
# A tuple of 3-tuples with (failure_message, functor, expected_results)
# If any static_affordance does not match expected_results fail with
# <failure_message>. Overridden in livepatch and fips
@property
def static_affordances(self) -> Tuple[StaticAffordance, ...]:
return ()
@property
def incompatible_services(self) -> Tuple[IncompatibleService, ...]:
"""
Return a list of packages that aren't compatible with the entitlement.
When we are enabling the entitlement we can directly ask the user
if those entitlements can be disabled before proceding.
Overridden in livepatch and fips
"""
return self._incompatible_services
@property
def required_services(self) -> Tuple[Type["UAEntitlement"], ...]:
"""
Return a list of packages that must be active before enabling this
service. When we are enabling the entitlement we can directly ask
the user if those entitlements can be enabled before proceding.
Overridden in ros and ros-updates.
"""
return self._required_services
@property
def dependent_services(self) -> Tuple[Type["UAEntitlement"], ...]:
"""
Return a list of packages that depend on this service.
We will use that list during disable operations, where
a disable operation will also disable all of the services
required by the original service
Overriden in esm-apps and esm-infra
"""
return self._dependent_services
def _get_variants(self) -> Dict[str, Type["UAEntitlement"]]:
return {}
def _get_contract_variants(self) -> Set[str]:
"""
Fetch all available variants defined in the Contract Server response
"""
valid_variants = set()
entitlement_cfg = self._base_entitlement_cfg()
overrides = entitlement_cfg.get("entitlement", {}).get("overrides", [])
for override in overrides:
variant = override.get("selector", {}).get("variant")
if variant:
valid_variants.add(variant)
return valid_variants
def _get_valid_variants(self) -> Dict[str, Type["UAEntitlement"]]:
service_variants = self._get_variants()
contract_variants = self._get_contract_variants()
if "generic" in service_variants:
valid_variants = {"generic": service_variants["generic"]}
else:
valid_variants = {}
for variant in sorted(contract_variants):
if variant in service_variants:
valid_variants[variant] = service_variants[variant]
return valid_variants if len(valid_variants) > 1 else {}
@property
def variants(self) -> Dict[str, Type["UAEntitlement"]]:
"""
Return a list of services that are considered a variant
of the main service.
"""
if self.is_variant:
return {}
return self._get_valid_variants()
@property
def other_variants(self) -> Dict[str, Type["UAEntitlement"]]:
"""
On a variant, return the other variants of the main service.
On a non-variant, returns empty.
"""
if not self.is_variant:
return {}
return {
name: cls
for name, cls in self._get_valid_variants().items()
if name != self.variant_name
}
@property
def enabled_variant(self) -> Optional["UAEntitlement"]:
"""
On an enabled service class, return the variant that is enabled.
Return None if no variants exist or none are enabled (e.g. access-only)
"""
for variant_cls in self.variants.values():
if variant_cls.variant_name == "generic":
continue
variant = variant_cls(
cfg=self.cfg,
assume_yes=self.assume_yes,
allow_beta=self.allow_beta,
called_name=self._called_name,
access_only=self.access_only,
)
status, _ = variant.application_status()
if status == ApplicationStatus.ENABLED:
return variant
return None
# Any custom messages to emit to the console or callables which are
# handled at pre_enable, pre_disable, pre_install or post_enable stages
@property
def messaging(self) -> MessagingOperationsDict:
return {}
def __init__(
self,
cfg: Optional[config.UAConfig] = None,
assume_yes: bool = False,
allow_beta: bool = False,
called_name: str = "",
access_only: bool = False,
purge: bool = False,
extra_args: Optional[List[str]] = None,
) -> None:
"""Setup UAEntitlement instance
@param config: Parsed configuration dictionary
"""
if not cfg:
cfg = config.UAConfig()
self.cfg = cfg
self.assume_yes = assume_yes
self.allow_beta = allow_beta
self.access_only = access_only
self.purge = purge
if extra_args is not None:
self.extra_args = extra_args
else:
self.extra_args = []
self._called_name = called_name
self._valid_service = None # type: Optional[bool]
self._is_sources_list_updated = False
@property
def valid_service(self):
"""Check if the service is marked as valid (non-beta)"""
if self._valid_service is None:
self._valid_service = (
not self.is_beta
or self.allow_beta
or is_config_value_true(self.cfg.cfg, "features.allow_beta")
)
return self._valid_service
def _base_entitlement_cfg(self):
return copy.deepcopy(
self.cfg.machine_token_file.entitlements.get(self.name, {})
)
@property
def entitlement_cfg(self):
entitlement_cfg = self._base_entitlement_cfg()
if not self.is_variant or not entitlement_cfg:
return entitlement_cfg
contract.apply_contract_overrides(
orig_access=entitlement_cfg, variant=self.variant_name
)
return entitlement_cfg
def can_enable(self) -> Tuple[bool, Optional[CanEnableFailure]]:
"""
Report whether or not enabling is possible for the entitlement.
:return:
(True, None) if can enable
(False, CanEnableFailure) if can't enable
"""
if self.is_access_expired():
LOG.debug("Updating contract on service '%s' expiry", self.name)
contract.refresh(self.cfg)
if not self.contract_status() == ContractStatus.ENTITLED:
return (
False,
CanEnableFailure(
CanEnableFailureReason.NOT_ENTITLED,
message=messages.UNENTITLED.format(title=self.title),
),
)
application_status, _ = self.application_status()
if application_status != ApplicationStatus.DISABLED:
return (
False,
CanEnableFailure(
CanEnableFailureReason.ALREADY_ENABLED,
message=messages.ALREADY_ENABLED.format(title=self.title),
),
)
if not self.valid_service:
return (False, CanEnableFailure(CanEnableFailureReason.IS_BETA))
applicability_status, details = self.applicability_status()
if applicability_status == ApplicabilityStatus.INAPPLICABLE:
return (
False,
CanEnableFailure(
CanEnableFailureReason.INAPPLICABLE, message=details
),
)
if self.incompatible_services:
if self.detect_incompatible_services():
return (
False,
CanEnableFailure(
CanEnableFailureReason.INCOMPATIBLE_SERVICE
),
)
if self.required_services:
if not self.check_required_services_active():
return (
False,
CanEnableFailure(
CanEnableFailureReason.INACTIVE_REQUIRED_SERVICES
),
)
if not self.supports_access_only and self.access_only:
return (
False,
CanEnableFailure(
CanEnableFailureReason.ACCESS_ONLY_NOT_SUPPORTED,
messages.ENABLE_ACCESS_ONLY_NOT_SUPPORTED.format(
title=self.title
),
),
)
return (True, None)
# using Union instead of Optional here to signal that it may expand to
# support additional reason types in the future.
def enable(
self,
silent: bool = False,
) -> Tuple[bool, Union[None, CanEnableFailure]]:
"""Enable specific entitlement.
@return: tuple of (success, optional reason)
(True, None) on success.
(False, reason) otherwise. reason is only non-None if it is a
populated CanEnableFailure reason. This may expand to
include other types of reasons in the future.
"""
msg_ops = self.messaging.get("pre_can_enable", [])
if not util.handle_message_operations(msg_ops):
return False, None
can_enable, fail = self.can_enable()
if not can_enable:
if fail is None:
# this shouldn't happen, but if it does we shouldn't continue
return False, None
elif fail.reason == CanEnableFailureReason.INCOMPATIBLE_SERVICE:
# Try to disable those services before proceeding with enable
incompat_ret, error = self.handle_incompatible_services()
if not incompat_ret:
fail.message = error
return False, fail
elif (
fail.reason
== CanEnableFailureReason.INACTIVE_REQUIRED_SERVICES
):
# Try to enable those services before proceeding with enable
req_ret, error = self._enable_required_services()
if not req_ret:
fail.message = error
return False, fail
else:
# every other reason means we can't continue
return False, fail
msg_ops = self.messaging.get("pre_enable", [])
if not util.handle_message_operations(msg_ops):
return False, None
# TODO: Move all logic from RepoEntitlement that
# handles the additionalPackages and APT directives
# to the base class. The additionalSnaps handling
# is a step on that direction
if not self.access_only:
if not self.handle_required_snaps():
return False, None
if not self.handle_required_packages():
return False, None
ret = self._perform_enable(silent=silent)
if not ret:
return False, None
msg_ops = self.messaging.get("post_enable", [])
if not util.handle_message_operations(msg_ops):
return False, None
return True, None
def handle_required_snaps(self) -> bool:
""" "install snaps necessary to enable a service."""
required_snaps = (
self.entitlement_cfg.get("entitlement", {})
.get("directives", {})
.get("requiredSnaps")
)
# If we don't have the directive, there is nothing
# to process here
if required_snaps is None:
return True
if not snap.is_snapd_installed():
event.info(messages.INSTALLING_PACKAGES.format(packages="snapd"))
snap.install_snapd()
if not snap.is_snapd_installed_as_a_snap():
event.info(
messages.INSTALLING_PACKAGES.format(packages="snapd snap")
)
try:
snap.install_snap("snapd")
except exceptions.ProcessExecutionError as e:
LOG.warning("Failed to install snapd as a snap", exc_info=e)
event.info(
messages.EXECUTING_COMMAND_FAILED.format(
command="snap install snapd"
)
)
snap.run_snapd_wait_cmd()
http_proxy = http.validate_proxy(
"http", self.cfg.http_proxy, http.PROXY_VALIDATION_SNAP_HTTP_URL
)
https_proxy = http.validate_proxy(
"https", self.cfg.https_proxy, http.PROXY_VALIDATION_SNAP_HTTPS_URL
)
snap.configure_snap_proxy(
http_proxy=http_proxy,
https_proxy=https_proxy,
retry_sleeps=snap.SNAP_INSTALL_RETRIES,
)
if required_snaps:
event.info(messages.INSTALLING_REQUIRED_SNAPS)
for snap_pkg in sorted(required_snaps, key=lambda x: x.get("name")):
# The name field should always be delivered by the contract side
snap_name = snap_pkg["name"]
try:
snap.get_snap_info(snap_name)
except exceptions.SnapNotInstalledError:
classic_confinement_support = snap_pkg.get(
"classicConfinementSupport", False
)
channel = snap_pkg.get("channel")
event.info(
messages.INSTALLING_REQUIRED_SNAP_PACKAGE.format(
snap=snap_name
)
)
snap.install_snap(
snap_name,
channel=channel,
classic_confinement_support=classic_confinement_support,
)
return True
def handle_required_packages(self) -> bool:
"""install packages necessary to enable a service."""
required_packages = (
self.entitlement_cfg.get("entitlement", {})
.get("directives", {})
.get("requiredPackages")
)
# If we don't have the directive, there is nothing
# to process here
if not required_packages:
return True
self._update_sources_list()
package_names = [package["name"] for package in required_packages]
LOG.debug("Installing packages %r", package_names)
event.info(
messages.INSTALLING_PACKAGES.format(
packages=" ".join(package_names)
)
)
apt.run_apt_install_command(package_names)
return True
def handle_removing_required_packages(self) -> bool:
"""install packages necessary to enable a service."""
required_packages = (
self.entitlement_cfg.get("entitlement", {})
.get("directives", {})
.get("requiredPackages")
)
# If we don't have the directive, there is nothing
# to process here
if not required_packages:
return True
package_names = [
package["name"]
for package in required_packages
if package.get("removeOnDisable", False)
]
LOG.debug("Uninstalling packages %r", package_names)
package_names_str = " ".join(package_names)
event.info(
messages.UNINSTALLING_PACKAGES.format(packages=package_names_str)
)
apt.remove_packages(
package_names,
messages.UNINSTALLING_PACKAGES_FAILED.format(
packages=package_names_str
),
)
return True
@abc.abstractmethod
def _perform_enable(self, silent: bool = False) -> bool:
"""
Enable specific entitlement. This should be implemented by subclasses.
This method does the actual enablement, and does not check can_enable
or handle pre_enable or post_enable messaging.
@return: True on success, False otherwise.
"""
pass
def detect_dependent_services(self) -> bool:
"""
Check for depedent services.
:return:
True if there are dependent services enabled
False if there are no dependent services enabled
"""
for dependent_service_cls in self.dependent_services:
ent_status, _ = dependent_service_cls(
self.cfg
).application_status()
if ent_status == ApplicationStatus.ENABLED:
return True
return False
def check_required_services_active(self):
"""
Check if all required services are active
:return:
True if all required services are active
False is at least one of the required services is disabled
"""
for required_service_cls in self.required_services:
ent_status, _ = required_service_cls(self.cfg).application_status()
if ent_status != ApplicationStatus.ENABLED:
return False
return True
def blocking_incompatible_services(self) -> List[IncompatibleService]:
"""
:return: List of incompatible services that are enabled
"""
ret = []
for service in self.incompatible_services:
ent_status, _ = service.entitlement(self.cfg).application_status()
if ent_status == ApplicationStatus.ENABLED:
ret.append(service)
return ret
def detect_incompatible_services(self) -> bool:
"""
Check for incompatible services.
:return:
True if there are incompatible services enabled
False if there are no incompatible services enabled
"""
return len(self.blocking_incompatible_services()) > 0
def handle_incompatible_services(
self,
) -> Tuple[bool, Optional[messages.NamedMessage]]:
"""
Prompt user when incompatible services are found during enable.
When enabling a service, we may find that there is an incompatible
service already enable. In that situation, we can ask the user
if the incompatible service should be disabled before proceeding.
There are also different ways to configure that behavior:
We can disable removing incompatible service during enable by
adding the following lines into uaclient.conf:
features:
block_disable_on_enable: true
"""
cfg_block_disable_on_enable = util.is_config_value_true(
config=self.cfg.cfg,
path_to_value="features.block_disable_on_enable",
)
for service in self.blocking_incompatible_services():
ent = service.entitlement(self.cfg, assume_yes=True)
user_msg = messages.INCOMPATIBLE_SERVICE.format(
service_being_enabled=self.title,
incompatible_service=ent.title,
)
e_msg = messages.INCOMPATIBLE_SERVICE_STOPS_ENABLE.format(
service_being_enabled=self.title,
incompatible_service=ent.title,
)
if cfg_block_disable_on_enable:
return False, e_msg
if not util.prompt_for_confirmation(
msg=user_msg, assume_yes=self.assume_yes
):
return False, e_msg
event.info(
messages.DISABLING_INCOMPATIBLE_SERVICE.format(
service=ent.title
)
)
ret = ent.disable(silent=True)
if not ret:
return ret, None
return True, None
def _enable_required_services(
self,
) -> Tuple[bool, Optional[messages.NamedMessage]]:
"""
Prompt user when required services are found during enable.
When enabling a service, we may find that there are required services
that must be enabled first. In that situation, we can ask the user
if the required service should be enabled before proceeding.
"""
for required_service_cls in self.required_services:
ent = required_service_cls(self.cfg, allow_beta=True)
is_service_disabled = (
ent.application_status()[0] == ApplicationStatus.DISABLED
)
if is_service_disabled:
user_msg = messages.REQUIRED_SERVICE.format(
service_being_enabled=self.title,
required_service=ent.title,
)
e_msg = messages.REQUIRED_SERVICE_STOPS_ENABLE.format(
service_being_enabled=self.title,
required_service=ent.title,
)
if not util.prompt_for_confirmation(
msg=user_msg, assume_yes=self.assume_yes
):
return False, e_msg
event.info(
messages.ENABLING_REQUIRED_SERVICE.format(
service=ent.title
)
)
ret, fail = ent.enable(silent=True)
if not ret:
error_msg = ""
if fail and fail.message and fail.message.msg:
error_msg = "\n" + fail.message.msg
msg = messages.ERROR_ENABLING_REQUIRED_SERVICE.format(
error=error_msg, service=ent.title
)
return ret, msg
return True, None
def can_disable(
self, ignore_dependent_services: bool = False
) -> Tuple[bool, Optional[CanDisableFailure]]:
"""Report whether or not disabling is possible for the entitlement.
:return:
(True, None) if can disable
(False, CanDisableFailure) if can't disable
"""
application_status, _ = self.application_status()
if application_status == ApplicationStatus.DISABLED:
return (
False,
CanDisableFailure(
CanDisableFailureReason.ALREADY_DISABLED,
message=messages.ALREADY_DISABLED.format(title=self.title),
),
)
if self.dependent_services and not ignore_dependent_services:
if self.detect_dependent_services():
return (
False,
CanDisableFailure(
CanDisableFailureReason.ACTIVE_DEPENDENT_SERVICES
),
)
if not self.supports_purge and self.purge:
return (
False,
CanDisableFailure(
CanDisableFailureReason.PURGE_NOT_SUPPORTED,
messages.DISABLE_PURGE_NOT_SUPPORTED.format(
title=self.title
),
),
)
return True, None
def disable(
self, silent: bool = False
) -> Tuple[bool, Optional[CanDisableFailure]]:
"""Disable specific entitlement
@param silent: Boolean set True to silence print/log of messages
@return: tuple of (success, optional reason)
(True, None) on success.
(False, reason) otherwise. reason is only non-None if it is a
populated CanDisableFailure reason. This may expand to
include other types of reasons in the future.
"""
msg_ops = self.messaging.get("pre_disable", [])
if not util.handle_message_operations(msg_ops):
return False, None
can_disable, fail = self.can_disable()
if not can_disable:
if fail is None:
# this shouldn't happen, but if it does we shouldn't continue
return False, None
elif (
fail.reason
== CanDisableFailureReason.ACTIVE_DEPENDENT_SERVICES
):
ret, msg = self._disable_dependent_services(silent=silent)
if not ret:
fail.message = msg
return False, fail
else:
# every other reason means we can't continue
return False, fail
if not self._perform_disable(silent=silent):
return False, None
if not self.handle_removing_required_packages():
return False, None
msg_ops = self.messaging.get("post_disable", [])
if not util.handle_message_operations(msg_ops):
return False, None
self._check_for_reboot_msg(
operation="disable operation", silent=silent
)
return True, None
@abc.abstractmethod
def _perform_disable(self, silent: bool = False) -> bool:
"""
Disable specific entitlement. This should be implemented by subclasses.
This method does the actual disable, and does not check can_disable
or handle pre_disable or post_disable messaging.
@param silent: Boolean set True to silence print/log of messages
@return: True on success, False otherwise.
"""
pass
def _disable_dependent_services(
self, silent: bool
) -> Tuple[bool, Optional[messages.NamedMessage]]:
"""
Disable dependent services
When performing a disable operation, we might have
other services that depend on the original services.
If that is true, we will alert the user about this
and prompt for confirmation to disable these services
as well.
@param silent: Boolean set True to silence print/log of messages
"""
for dependent_service_cls in self.dependent_services:
ent = dependent_service_cls(cfg=self.cfg, assume_yes=True)
is_service_enabled = (
ent.application_status()[0] == ApplicationStatus.ENABLED
)
if is_service_enabled:
user_msg = messages.DEPENDENT_SERVICE.format(
dependent_service=ent.title,
service_being_disabled=self.title,
)
e_msg = messages.DEPENDENT_SERVICE_STOPS_DISABLE.format(
service_being_disabled=self.title,
dependent_service=ent.title,
)
if not util.prompt_for_confirmation(
msg=user_msg, assume_yes=self.assume_yes
):
return False, e_msg
if not silent:
event.info(
messages.DISABLING_DEPENDENT_SERVICE.format(
required_service=ent.title
)
)
ret, fail = ent.disable(silent=True)
if not ret:
error_msg = ""
if fail and fail.message and fail.message.msg:
error_msg = "\n" + fail.message.msg
msg = messages.FAILED_DISABLING_DEPENDENT_SERVICE.format(
error=error_msg, required_service=ent.title
)
return False, msg
return True, None
def _check_for_reboot(self) -> bool:
"""Check if system needs to be rebooted."""
return system.should_reboot()
def _check_for_reboot_msg(
self, operation: str, silent: bool = False
) -> None:
"""Check if user should be alerted that a reboot must be performed.
@param operation: The operation being executed.
@param silent: Boolean set True to silence print/log of messages
"""
if self._check_for_reboot() and not silent:
event.info(
messages.ENABLE_REBOOT_REQUIRED_TMPL.format(
operation=operation
)
)
def applicability_status(
self,
) -> Tuple[ApplicabilityStatus, Optional[messages.NamedMessage]]:
"""Check all contract affordances to vet current platform
Affordances are a list of support constraints for the entitlement.
Examples include a list of supported series, architectures for kernel
revisions.
:return:
tuple of (ApplicabilityStatus, NamedMessage). APPLICABLE if
platform passes all defined affordances, INAPPLICABLE if it doesn't
meet all of the provided constraints.
"""
entitlement_cfg = self.entitlement_cfg
if not entitlement_cfg:
return (
ApplicabilityStatus.APPLICABLE,
messages.NO_ENTITLEMENT_AFFORDANCES_CHECKED,
)
for error_message, functor, expected_result in self.static_affordances:
if functor() != expected_result:
return ApplicabilityStatus.INAPPLICABLE, error_message
affordances = entitlement_cfg["entitlement"].get("affordances", {})
affordance_arches = affordances.get("architectures", None)
if (
self.affordance_check_arch
and affordance_arches is not None
and system.get_dpkg_arch() not in affordance_arches
):
deduplicated_arches = util.deduplicate_arches(affordance_arches)
return (
ApplicabilityStatus.INAPPLICABLE,
messages.INAPPLICABLE_ARCH.format(
title=self.title,
arch=system.get_dpkg_arch(),
supported_arches=", ".join(deduplicated_arches),
),
)
affordance_series = affordances.get("series", None)
if (
self.affordance_check_series
and affordance_series is not None
and system.get_release_info().series not in affordance_series
):
return (
ApplicabilityStatus.INAPPLICABLE,
messages.INAPPLICABLE_SERIES.format(
title=self.title,
series=system.get_release_info().pretty_version,
),
)
kernel_info = system.get_kernel_info()
affordance_kernels = affordances.get("kernelFlavors", None)
affordance_min_kernel = affordances.get("minKernelVersion", None)
if (
self.affordance_check_kernel_flavor
and affordance_kernels is not None
):
if kernel_info.flavor not in affordance_kernels:
return (
ApplicabilityStatus.INAPPLICABLE,
messages.INAPPLICABLE_KERNEL.format(
title=self.title,
kernel=kernel_info.uname_release,
supported_kernels=", ".join(affordance_kernels),
),
)
if (
self.affordance_check_kernel_min_version
and affordance_min_kernel
and kernel_info.major is not None
and kernel_info.minor is not None
):
invalid_msg = messages.INAPPLICABLE_KERNEL_VER.format(
title=self.title,
kernel=kernel_info.uname_release,
min_kernel=affordance_min_kernel,
)
try:
kernel_major, kernel_minor = affordance_min_kernel.split(".")
min_kern_major = int(kernel_major)
min_kern_minor = int(kernel_minor)
except ValueError:
LOG.warning(
"Could not parse minKernelVersion: %s",
affordance_min_kernel,
)
return (ApplicabilityStatus.INAPPLICABLE, invalid_msg)
if kernel_info.major < min_kern_major:
return ApplicabilityStatus.INAPPLICABLE, invalid_msg
elif (
kernel_info.major == min_kern_major
and kernel_info.minor < min_kern_minor
):
return ApplicabilityStatus.INAPPLICABLE, invalid_msg
affordances_platform_check = affordances.get("platformChecks", {})
ret, reason = self.verify_platform_checks(affordances_platform_check)
if not ret:
return (ApplicabilityStatus.INAPPLICABLE, reason)
return ApplicabilityStatus.APPLICABLE, None
def contract_status(self) -> ContractStatus:
"""Return whether the user is entitled to the entitlement or not"""
if not _is_attached(self.cfg).is_attached:
return ContractStatus.UNENTITLED
entitlement_cfg = self.entitlement_cfg
if entitlement_cfg and entitlement_cfg["entitlement"].get("entitled"):
return ContractStatus.ENTITLED
return ContractStatus.UNENTITLED
def user_facing_status(
self,
) -> Tuple[UserFacingStatus, Optional[messages.NamedMessage]]:
"""Return (user-facing status, details) for entitlement"""
applicability, details = self.applicability_status()
if applicability != ApplicabilityStatus.APPLICABLE:
return UserFacingStatus.INAPPLICABLE, details
entitlement_cfg = self.entitlement_cfg
if not entitlement_cfg:
return (
UserFacingStatus.UNAVAILABLE,
messages.SERVICE_NOT_ENTITLED.format(title=self.title),
)
elif entitlement_cfg["entitlement"].get("entitled", False) is False:
return (
UserFacingStatus.UNAVAILABLE,
messages.SERVICE_NOT_ENTITLED.format(title=self.title),
)
application_status, explanation = self.application_status()
if application_status == ApplicationStatus.DISABLED:
return UserFacingStatus.INACTIVE, explanation
warning, warn_msg = self.enabled_warning_status()
if warning:
return UserFacingStatus.WARNING, warn_msg
return UserFacingStatus.ACTIVE, explanation
@abc.abstractmethod
def application_status(
self,
) -> Tuple[ApplicationStatus, Optional[messages.NamedMessage]]:
"""
The current status of application of this entitlement
:return:
A tuple of (ApplicationStatus, human-friendly reason)
"""
pass
def enabled_warning_status(
self,
) -> Tuple[bool, Optional[messages.NamedMessage]]:
"""
If the entitlment is enabled, are there any warnings?
The message is displayed as a Warning Notice in status output
:return:
A tuple of (warning bool, human-friendly reason)
"""
return False, None
def status_description_override(
self,
) -> Optional[str]:
return None
def is_access_expired(self) -> bool:
"""Return entitlement access info as stale and needing refresh."""
# TODO(No expiry per resource in MVP yet)
expire_str = self.entitlement_cfg.get("expires")
if not expire_str:
return False
expiry = datetime.strptime(expire_str, "%Y-%m-%dT%H:%M:%S.%fZ")
if expiry >= datetime.utcnow():
return False
return True
def _check_application_status_on_cache(self) -> ApplicationStatus:
"""Check on the state of application on the status cache."""
status_cache = self.cfg.read_cache("status-cache")
if status_cache is None:
return ApplicationStatus.DISABLED
services_status_list = status_cache.get("services", [])
for service in services_status_list:
if service.get("name") == self.name:
service_status = service.get("status")
if service_status == "enabled":
return ApplicationStatus.ENABLED
else:
return ApplicationStatus.DISABLED
return ApplicationStatus.DISABLED
def _should_enable_by_default(
self, obligations: Dict[str, Any], resourceToken: Optional[str]
) -> bool:
return bool(obligations.get("enableByDefault") and resourceToken)
def process_contract_deltas(
self,
orig_access: Dict[str, Any],
deltas: Dict[str, Any],
allow_enable: bool = False,
) -> bool:
"""Process any contract access deltas for this entitlement.
:param orig_access: Dictionary containing the original
resourceEntitlement access details.
:param deltas: Dictionary which contains only the changed access keys
and values.
:param allow_enable: Boolean set True if allowed to perform the enable
operation. When False, a message will be logged to inform the user
about the recommended enabled service.
:return: True when delta operations are processed; False when noop.
:raise: UbuntuProError when auto-enable fails unexpectedly.
"""
if not deltas:
return True # We processed all deltas that needed processing
delta_entitlement = deltas.get("entitlement", {})
delta_directives = delta_entitlement.get("directives", {})
status_cache = self.cfg.read_cache("status-cache")
transition_to_unentitled = bool(delta_entitlement == util.DROPPED_KEY)
if not transition_to_unentitled:
if delta_entitlement:
contract.apply_contract_overrides(deltas)
delta_entitlement = deltas["entitlement"]
if orig_access and "entitled" in delta_entitlement:
transition_to_unentitled = delta_entitlement["entitled"] in (
False,
util.DROPPED_KEY,
)
if transition_to_unentitled:
if delta_directives and status_cache:
application_status = self._check_application_status_on_cache()
else:
application_status, _ = self.application_status()
if application_status != ApplicationStatus.DISABLED:
if self.can_disable():
LOG.info(
"Disabling %s after refresh transition to unentitled"
)
self.disable()
msg = (
"Due to contract refresh, " "'{}' is now disabled."
).format(self.name)
event.info(
messages.DISABLE_DURING_CONTRACT_REFRESH.format(
service=self.name
)
)
else:
LOG.warning(
"Cannot disable %s after refresh transition to "
"unentitled"
)
event.info(
messages.UNABLE_TO_DISABLE_DURING_CONTRACT_REFRESH.format( # noqa: E501
service=self.name
)
)
# Clean up former entitled machine-access-<name> response cache
# file because uaclient doesn't access machine-access-* routes or
# responses on unentitled services.
self.cfg.delete_cache_key("machine-access-{}".format(self.name))
return True
resourceToken = orig_access.get("resourceToken")
if not resourceToken:
resourceToken = deltas.get("resourceToken")
delta_obligations = delta_entitlement.get("obligations", {})
enable_by_default = self._should_enable_by_default(
delta_obligations, resourceToken
)
if enable_by_default:
self.allow_beta = True
can_enable, _ = self.can_enable()
if can_enable and enable_by_default:
if allow_enable:
msg = messages.ENABLE_BY_DEFAULT_TMPL.format(name=self.name)
event.info(msg, file_type=sys.stderr)
self.enable()
else:
msg = messages.ENABLE_BY_DEFAULT_MANUAL_TMPL.format(
name=self.name
)
event.info(msg, file_type=sys.stderr)
return True
return False
def _update_sources_list(self):
if self._is_sources_list_updated:
return
event.info(messages.APT_UPDATING_LIST.format(name="standard Ubuntu"))
apt.update_sources_list("/etc/apt/sources.list")
self._is_sources_list_updated = True
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