Using for loop in python to test ping response from multiple hosts
Today let us have a look at an interesting python script to test ping connectivity on a list of hosts.
To understand this lets create below script and a hosts file, then execute it.
1. Create a Python Script for Ping
$ cat hostping.py
import socket # For connecting two nodes on a network to communicate with each other
import sys # To get access to some variables used/maintained by interpreter and function that interact with interpreter
import os # Allows an interface with the OS that Python is running on.
file = open("./host.txt","r")
for server_name in file:
server_state = os.system('ping -c 2 ' + server_name )
if server_state == 0:
print(server_name +"===== Server is UP=====")
else:
print("=====Server is DOWN====")
$
2. Create the file host.txt containing all hosts on which we need to test ping.
$ cat host.txt r001-ngelinux.com r002-ngelinux.com r003-ngelinux.com r004-ngelinux.com r005-ngelinux.com r006-ngelinux.com r007-ngelinux.com r008-ngelinux.com r009-ngelinux.com r010-ngelinux.com r011-ngelinux.com r012-ngelinux.com r013-ngelinux.com r014-ngelinux.com r015-ngelinux.com r016-ngelinux.com r017-ngelinux.com r018-ngelinux.com r019-ngelinux.com r020-ngelinux.com $
3. Run the script and check output.
$ python ./hostping.py PING r001-ngelinux.com (10.24.80.9): 56 data bytes 64 bytes from 10.24.80.9: icmp_seq=0 ttl=50 time=297.965 ms 64 bytes from 10.24.80.9: icmp_seq=1 ttl=50 time=298.016 ms --- r001-ngelinux.com ping statistics --- 2 packets transmitted, 2 packets received, 0.0% packet loss round-trip min/avg/max/stddev = 297.965/297.990/298.016/0.026 ms r001-ngelinux.com ===== Server is UP===== PING r002-ngelinux.com (10.24.88.9): 56 data bytes 64 bytes from 10.24.88.9: icmp_seq=0 ttl=49 time=303.543 ms 64 bytes from 10.24.88.9: icmp_seq=1 ttl=49 time=303.368 ms --- r002-ngelinux.com ping statistics --- 2 packets transmitted, 2 packets received, 0.0% packet loss round-trip min/avg/max/stddev = 303.368/303.456/303.543/0.087 ms r002-ngelinux.com ===== Server is UP===== PING r003-ngelinux.com (10.24.96.9): 56 data bytes 64 bytes from 10.24.96.9: icmp_seq=0 ttl=49 time=342.405 ms 64 bytes from 10.24.96.9: icmp_seq=1 ttl=49 time=342.275 ms --- r003-ngelinux.com ping statistics --- 2 packets transmitted, 2 packets received, 0.0% packet loss round-trip min/avg/max/stddev = 342.275/342.340/342.405/0.065 ms r003-ngelinux.com ===== Server is UP=====