Created
July 9, 2014 05:41
-
-
Save advancedxy/bdfcf1c23ff70c463062 to your computer and use it in GitHub Desktop.
hadoop rack awareness script
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
#!/usr/bin/env python | |
import sys | |
import socket | |
data = """ | |
100.200.208.12-100.200.208.46 : /xxx/rack_1 | |
""" | |
def ip_integer_from_string(s): | |
return reduce(lambda a,b: a<<8 | b, map(int, s.split("."))) | |
def ip_integer_to_string(ip): | |
return ".".join(map(lambda n: str(ip>>n & 0xFF), [24,16,8,0])) | |
def hostname_to_ip(ip): | |
socket.setdefaulttimeout(1) | |
try: | |
return socket.gethostbyname(ip) | |
except Exception,e: | |
return "255.255.255.255" | |
if __name__ == "__main__": | |
rack_info = {} | |
for line in filter(lambda x : ':' in x ,data.split('\n')): | |
k,v = map(lambda x: x.strip(), line.split(":")) | |
if '-' in k: | |
start,end = map(lambda x: ip_integer_from_string(x.strip()), k.split('-')) | |
if start < end : | |
for ip in range(start, end+1): | |
rack_info[ip_integer_to_string(ip)] = v | |
else: | |
rack_info[k.strip()] = v | |
sys.stdout.write(' '.join(map(lambda x: rack_info.get(hostname_to_ip(x), "/default/default_rack"), sys.argv[1:]))) |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment