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#!/usr/bin/env python3
"""
Perform auto-attach operation
On Ubuntu Pro machines, we try to perform an auto-attach operation
on first boot. This happens through a systemd unit that executes
this script on every boot. However, if we detect
that cloud-init has user data related to ua, we don't run
auto-attach here, since cloud-init will drive this operation on
their side.
"""
import logging
import sys
from uaclient import exceptions, http, log, messages, system
from uaclient.api.exceptions import (
AlreadyAttachedError,
AutoAttachDisabledError,
EntitlementsNotEnabledError,
)
from uaclient.api.u.pro.attach.auto.full_auto_attach.v1 import (
FullAutoAttachOptions,
full_auto_attach,
)
from uaclient.clouds.aws import AWSAutoAttachInstance
from uaclient.clouds.identity import cloud_instance_factory
from uaclient.config import UAConfig
from uaclient.daemon import AUTO_ATTACH_STATUS_MOTD_FILE, retry_auto_attach
from uaclient.files import state_files
LOG = logging.getLogger("ubuntupro.lib.auto_attach")
# All known cloud-config keys which provide ubuntu pro configuration directives
CLOUD_INIT_UA_KEYS = set(
["ubuntu-advantage", "ubuntu_advantage", "ubuntu_pro"]
)
try:
import cloudinit.stages as ci_stages # type: ignore
except ImportError:
pass
def get_cloudinit_init_stage():
if "cloudinit.stages" in sys.modules:
return ci_stages.Init()
return None
def check_cloudinit_userdata_for_ua_info():
init = get_cloudinit_init_stage()
# if init is None, this means we were not able to import the cloud-init
# module.
if init is None:
return False
if init.cfg and CLOUD_INIT_UA_KEYS.intersection(init.cfg):
return True
return False
def main(cfg: UAConfig):
if check_cloudinit_userdata_for_ua_info():
LOG.info("cloud-init userdata has ubuntu-advantage key.")
LOG.info(
"Skipping auto-attach and deferring to cloud-init "
"to setup and configure auto-attach"
)
return
try:
cloud = cloud_instance_factory()
except exceptions.CloudFactoryError as e:
LOG.debug("Error loading the cloud: %s", e)
else:
if isinstance(cloud, AWSAutoAttachInstance):
if not cloud.is_likely_pro:
LOG.info(
"Skipping auto-attach. Reason: No billingProduct nor"
" marketplaceProductCode on AWS."
)
return
else:
LOG.info("Auto-attaching: product code found on AWS.")
system.write_file(
AUTO_ATTACH_STATUS_MOTD_FILE, messages.AUTO_ATTACH_RUNNING
)
try:
full_auto_attach(FullAutoAttachOptions())
except AlreadyAttachedError as e:
LOG.info(e.msg)
except AutoAttachDisabledError:
LOG.debug("Skipping auto-attach. Config disable_auto_attach is set.")
except EntitlementsNotEnabledError as e:
LOG.warning(e.msg)
except Exception as e:
LOG.error(e)
system.ensure_file_absent(AUTO_ATTACH_STATUS_MOTD_FILE)
LOG.info("creating flag file to trigger retries")
system.create_file(retry_auto_attach.FLAG_FILE_PATH)
failure_reason = (
retry_auto_attach.full_auto_attach_exception_to_failure_reason(e)
)
state_files.retry_auto_attach_state_file.write(
state_files.RetryAutoAttachState(
interval_index=0, failure_reason=failure_reason
)
)
return 1
system.ensure_file_absent(AUTO_ATTACH_STATUS_MOTD_FILE)
return 0
if __name__ == "__main__":
log.setup_journald_logging()
cfg = UAConfig()
http.configure_web_proxy(cfg.http_proxy, cfg.https_proxy)
sys.exit(main(cfg))