So I want to use the same SSH Public key to be able to authenticate across multiple Linux VMs that I’m building in Azure in Terraform. While I did find a lot of examples (including among Terraform example repo) of how to do it if you have the key stored on your local machine I couldn’t find (or didn’t search long enough) how to use an SSH key stored in Azure Key Vault while building Azure Linux VMs using Terraform.
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Python – Test Network Connection
The below will return True/False
import socket
def test_connection(host="8.8.8.8", port=53, timeout=3):
try:
socket.setdefaulttimeout(timeout)
socket.socket(socket.AF_INET, socket.SOCK_STREAM).connect((host, port))
return True
except Exception as ex:
#print ex.message
return False
destination_host = "mymachine.company"
destination_port = 9997
timeout = 2
test_result = test_connection(destination_host, destination_port, timeout)
Or you can use this version to return the Exception in case connection has failed
import socket
def test_connection(host="8.8.8.8", port=53, timeout=3):
try:
socket.setdefaulttimeout(timeout)
socket.socket(socket.AF_INET, socket.SOCK_STREAM).connect((host, port))
return True, None
except Exception as ex:
#print ex.message
return False, ex.message
destination_host = "mymachine.company"
destination_port = 9997
timeout = 2
test_result, ex = test_connection(destination_host, destination_port, timeout)
Python – Get local machine IP
Here is how to use Python – to Get local machine IP
import socket
def get_ip():
s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
try:
# doesn't even have to be reachable
s.connect(('10.255.255.255', 1))
IP = s.getsockname()[0]
except:
IP = '127.0.0.1'
finally:
s.close()
return IP