dynamicweb/utils/tasks.py
2017-09-14 15:27:25 +02:00

95 lines
3.6 KiB
Python

import tempfile
import cdist
from cdist.integration import configure_hosts_simple
from celery.result import AsyncResult
from celery.utils.log import get_task_logger
from django.conf import settings
from django.core.mail import EmailMessage
from dynamicweb.celery import app
logger = get_task_logger(__name__)
@app.task(bind=True, max_retries=settings.CELERY_MAX_RETRIES)
def send_plain_email_task(self, email_data):
"""
This is a generic celery task to be used for sending emails.
A celery wrapper task for EmailMessage
:param self:
:param email_data: A dict of all needed email headers
:return:
"""
email = EmailMessage(**email_data)
email.send()
@app.task(bind=True, max_retries=settings.CELERY_MAX_RETRIES)
def save_ssh_key(self, hosts, keys):
"""
Saves ssh key into the VMs of a user using cdist
:param hosts: A list of hosts to be configured
:param keys: A list of keys to be added. A key should be dict of the
form {
'value': 'sha-.....', # public key as string
'state': True # whether key is to be added or
} # removed
"""
logger.debug("""Running save_ssh_key task for
Hosts: {hosts_str}
Keys: {keys_str}""".format(hosts_str=", ".join(hosts),
keys_str=", ".join([
"{value}->{state}".format(
value=key.get('value'),
state=str(
key.get('state')))
for key in keys]))
)
return_value = True
with tempfile.NamedTemporaryFile(delete=True) as tmp_manifest:
# Generate manifest to be used for configuring the hosts
lines_list = [
' --key "{key}" --state {state} \\\n'.format(
key=key['value'],
state='present' if key['state'] else 'absent'
).encode('utf-8')
for key in keys]
lines_list.insert(0, b'__ssh_authorized_keys root \\\n')
tmp_manifest.writelines(lines_list)
tmp_manifest.flush()
try:
configure_hosts_simple(hosts,
tmp_manifest.name,
verbose=cdist.argparse.VERBOSE_TRACE)
except Exception as cdist_exception:
logger.error(cdist_exception)
return_value = False
email_data = {
'subject': "celery save_ssh_key error - task id {0}".format(
self.request.id.__str__()),
'from_email': settings.DCL_SUPPORT_FROM_ADDRESS,
'to': ['info@ungleich.ch'],
'body': "Task Id: {0}\nResult: {1}\nTraceback: {2}".format(
self.request.id.__str__(), False, str(cdist_exception)),
}
send_plain_email_task(email_data)
return return_value
@app.task
def save_ssh_key_error_handler(uuid):
result = AsyncResult(uuid)
exc = result.get(propagate=False)
logger.error('Task {0} raised exception: {1!r}\n{2!r}'.format(
uuid, exc, result.traceback))
email_data = {
'subject': "[celery error] Save SSH key error {0}".format(uuid),
'from_email': settings.DCL_SUPPORT_FROM_ADDRESS,
'to': ['info@ungleich.ch'],
'body': "Task Id: {0}\nResult: {1}\nTraceback: {2}".format(
uuid, exc, result.traceback),
}
send_plain_email_task(email_data)