Hello folks,
It looks like nobody here have shared a sample Python script to send email from Nexus switches.
So, here is my one:
#!/isan/bin/python3
import smtplib
from os import getenv
from sys import argv, stderr
from email.mime.multipart import MIMEMultipart
from email.mime.text import MIMEText
from cisco import set_global_vrf
from cisco.system import System
hostname = System().get_hostname() # includes domain part
if len(argv) < 2 or argv[1] in ('-h', '--help'):
print("Usage:\n\tpython {} \"<message text>\" [subject [recipient (To:) [mailserver IP-address [vrf name or Id]]]]".format(argv[0]))
exit(1)
text = argv[1] # at least one argument is mandatory
msg = MIMEMultipart('alternative')
msg['From'] = f = getenv('SENDEMAILFROM') or hostname.replace('.', '@', 1)
msg['Subject'] = s = getenv('SENDEMAILSUBJ') or (argv[2] if len(argv) > 2 else 'Unspecified subject')
msg['To'] = t = getenv('SENDEMAILTO') or (argv[3] if len(argv) > 3 else '<your@company.net>')
server = getenv('SENDEMAILSERVER') or (argv[4] if len(argv) > 4 else '<your e-mail server ip address in management vrf>') # port = 25
set_global_vrf(getenv('SENDEMAILVRF') or (argv[5] if len(argv) > 5 else 'management'))
header = '''
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>{}</title>
</head>
<text>
<pre>
'''.format(s)
footer = '''
</pre>
</text>
</html>
'''
msg.attach(MIMEText(text, 'plain'))
msg.attach(MIMEText(header + text + footer, 'html'))
# According to RFC 2046, the last part of a multipart message, in this case the HTML message, is best and preferred.
try:
m = smtplib.SMTP(server, 25)
m.sendmail(f, t, msg.as_string())
m.quit()
except smtplib.SMTPException:
print("Failed to send E-Mail to {} on subject: \"{}\".".format(t, s, stderr))
raise
exit(0)E.g. use it in event manager applet like this:
action <#> cli python /scripts/sendemail.py "<Body text>." "<E-Mail subject>"
