If you’re using localhost you probably don’t need TLS, but you can test with
plain Python code if you can send an email using the default settings you
describe below:
# Import smtplib for the actual sending function
import smtplib
from email.mime.text import MIMEText
send_to = 'rvillanu...@ucera.org'
msg = MIMEText('Hello World')
msg['Subject'] = 'Test Airflow Email'
msg['From'] = 'airf...@example.com'
msg['To'] = send_to
# SMTP Send
s = smtplib.SMTP('localhost')
s.starttls() # Try commenting out this line and see if you get a different error
s.sendmail(me, [send_to], msg.as_string())
s.quit()
If commenting out “s.starttls” produces a new error try changing the “From” to
whatever you see that sendmail shows as sending from. Once you have a Python
script working you can update the airflow.cfg to the same settings.
From: Reed Villanueva [mailto:rvillanu...@ucera.org]
Sent: Tuesday, October 15, 2019 5:02 PM
To: users@airflow.apache.org
Subject: EmailOperator throws SMTPException(“STARTTLS extension not supported
by server.”)
Trying to use airflow's EmailOperator to send an email on
trigger_rule.ONE_FAILED and seeing error:
[2019-10-14 13:31:50,604] {configuration.py:206} WARNING - section/key
[smtp/smtp_user] not found in config
Traceback (most recent call last):
File "/bin/airflow", line 27, in <module>
[ args.func(args)
File "/usr/lib/python2.7/site-packages/airflow/bin/cli.py", line 392, in run
pool=args.pool,
File "/usr/lib/python2.7/site-packages/airflow/utils/db.py", line 50, in
wrapper
result = func(*args, **kwargs)
File "/usr/lib/python2.7/site-packages/airflow/models.py", line 1493, in
_run_raw_task
result = task_copy.execute(context=context)
File "/usr/lib/python2.7/site-packages/airflow/operators/email_operator.py",
line 64, in execute
send_email(self.to, self.subject, self.html_content, files=self.files,
cc=self.cc, bcc=self.bcc, mime_subtype=self.mime_subtype)
File "/usr/lib/python2.7/site-packages/airflow/utils/email.py", line 44, in
send_email
return backend(to, subject, html_content, files=files, dryrun=dryrun,
cc=cc, bcc=bcc, mime_subtype=mime_subtype)
File "/usr/lib/python2.7/site-packages/airflow/utils/email.py", line 87, in
send_email_smtp
send_MIME_email(SMTP_MAIL_FROM, recipients, msg, dryrun)
File "/usr/lib/python2.7/site-packages/airflow/utils/email.py", line 109, in
send_MIME_email
s.starttls()
File "/usr/lib64/python2.7/smtplib.py", line 643, in starttls
raise SMTPException("STARTTLS extension not supported by server.")
smtplib.SMTPException: STARTTLS
Have not changed the default airflow.cfg (other than for basic password
authentication to access the webserver) and the email portion looks like
[email]
email_backend = airflow.utils.email.send_email_smtp
[smtp]
# If you want airflow to send emails on retries, failure, and you want to use
# the airflow.utils.email.send_email_smtp function, you have to configure an
# smtp server here
smtp_host = localhost
smtp_starttls = True
smtp_ssl = False
# Uncomment and set the user/pass settings if you want to use SMTP AUTH
# smtp_user = airflow
# smtp_password = airflow
smtp_port = 25
smtp_mail_from = airf...@example.com<mailto:airf...@example.com>
Checking the port in the cfg file, it seems to be open and listening...
[rvillanueva@mapr001 queensetl_airflow]$ netstat -plnt | grep ':25'
(Not all processes could be identified, non-owned process info
will not be shown, you would have to be root to see it all.)
tcp 0 0 127.0.0.1:25 0.0.0.0:* LISTEN
-
tcp6 0 0 ::1:25 :::* LISTEN
-
... and I am able to use the linux sendmail bash command for other process that
run on this same machine (CentOS 7).
Anyone know what could be going on here or any further debugging tips?
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