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request_es_backup.py
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request_es_backup.py
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from esprit.raw import Connection
from esprit.snapshot import ESSnapshotsClient
from portality import models, app_email
from portality.background import BackgroundTask, BackgroundApi
from portality.core import app
from portality.tasks.helpers import background_helper
from portality.tasks.redis_huey import main_queue
# FIXME: update for index-per-type
class RequestESBackupBackgroundTask(BackgroundTask):
__action__ = "request_es_backup"
def run(self):
"""
Execute the task as specified by the background_job
:return:
"""
# Connection to the ES index
conn = Connection(app.config.get("ELASTIC_SEARCH_HOST"), index='_snapshot')
try:
client = ESSnapshotsClient(conn, app.config['ELASTIC_SEARCH_SNAPSHOT_REPOSITORY'])
resp = client.request_snapshot()
if resp.status_code == 200:
job = self.background_job
job.add_audit_message("ElasticSearch backup requested. Response: " + resp.text)
else:
raise Exception("Status code {0} received from snapshots plugin.".format(resp.text))
except Exception as e:
app_email.send_mail(
to=[app.config.get('ADMIN_EMAIL', 'sysadmin@cottagelabs.com')],
fro=app.config.get('SYSTEM_EMAIL_FROM', 'helpdesk@doaj.org'),
subject='Alert: DOAJ ElasticSearch backup failure',
msg_body="The ElasticSearch snapshot could not requested. Error: \n" + str(e)
)
raise e
def cleanup(self):
"""
Cleanup after a successful OR failed run of the task
:return:
"""
pass
@classmethod
def prepare(cls, username, **kwargs):
"""
Take an arbitrary set of keyword arguments and return an instance of a BackgroundJob,
or fail with a suitable exception
:param kwargs: arbitrary keyword arguments pertaining to this task type
:return: a BackgroundJob instance representing this task
"""
# first prepare a job record
job = background_helper.create_job(username, cls.__action__,
queue_id=huey_helper.queue_id, )
return job
@classmethod
def submit(cls, background_job):
"""
Submit the specified BackgroundJob to the background queue
:param background_job: the BackgroundJob instance
:return:
"""
background_job.save()
request_es_backup.schedule(args=(background_job.id,), delay=10)
huey_helper = RequestESBackupBackgroundTask.create_huey_helper(main_queue)
@huey_helper.register_schedule
def scheduled_request_es_backup():
user = app.config.get("SYSTEM_USERNAME")
job = RequestESBackupBackgroundTask.prepare(user)
RequestESBackupBackgroundTask.submit(job)
@huey_helper.register_execute(is_load_config=False)
def request_es_backup(job_id):
job = models.BackgroundJob.pull(job_id)
task = RequestESBackupBackgroundTask(job)
BackgroundApi.execute(task)