Re: preserving ssh keys

[Eric Doutreleau int-evry fr]

On Thu, 3 Apr 2003 Eric Doutreleau int-evry fr wrote:

Well

i have begin to learn python to solve my problem.

Here is what i have done

As i m a total beginner in python i m sure there s a lot of 
improvement which are possible.
Moreover there s a lot of assumption that have been made

-only ide disk
-only one disk
-no /var partition.

Thanks for all people that have answered to my question

in the kickstart file i have

%post --nochroot
chvt 3
(
mv -f /tmp/tempo/ssh_host_* /mnt/sysimage/etc/ssh
mv -f /tmp/tempo/local* /mnt/sysimage/var/cfengine/ppkeys
)

%pre --interpreter /usr/bin/python

import urllib, os
partition_script="/tmp/backupkey.py"
if not os.path.exists(partition_script):
    url="ftp://crotale.int-evry.fr/pub/ks/backupkey.py";
    urllib.urlretrieve(url, partition_script)
    os.system('chmod 755 ' + partition_script)
    os.system(partition_script)

And here is my backupkey.py script

#!/usr/bin/python

import os,sys,string
hds=""
mymedia=""
device=""
prefdev="/dev/"
tmproot="/tmp/root"
tmptempo="/tmp/tempo"
roo=""
va=""

numhd=0
for nomfichier in os.popen("ls -1d /proc/ide/h*/media").readlines():
	print "NOMF" , nomfichier , "\n"
	comm = "cat " + nomfichier
	media=string.strip(os.popen(comm).readline())
	if media == "disk":
        	parameters = string.split(nomfichier,"/")
		print parameters
         	device= parameters[3]
		print nomfichier,  device , media , "\n"
		numhd = numhd +1


print "NUMHD" , numhd
commande = "/usr/sbin/fdisk -l /dev/"  + device  + " | grep -i linux | grep -v Echange"
for ligne2 in os.popen(commande).readlines():
	num=1
	#print ligne2, "\n"
	devi = string.split(ligne2," ")
	part = devi[0]
	comm="/usr/sbin/e2label " + part
	for ligne3 in os.popen(comm).readlines():
		l = ligne3[:-1]
		if l == "/":
			roo = part
		if l == "/var":
			va = part
		print "LIGNE" , l , "\n"
print "ROOT" , roo, "VAR" , va , "\n"
if va == "/var":
	print "deux partoches\n"
else:
	comm = "mkdir " +  tmproot
	os.popen(comm)
        comm = "mkdir " + tmptempo
	os.popen(comm);
        comm = "mount " + roo + " " + tmproot;
	print comm , "\n"
	os.popen(comm);
        comm = "cp -a " + tmproot + "/etc/ssh/ssh_host_* " + tmptempo
	print comm , "\n"
	os.popen(comm)
        comm = "cp -a " + tmproot +"/var/cfengine/ppkeys/localhost* "  + tmptempo	
	print comm , "\n"
	os.popen(comm);
        comm = "umount " + tmproot 	
	print comm , "\n"
	os.popen(comm);

> 
> hi
> 
> i m wondering if someone has already written a %pre kickstart script
> to backup ssh keys in order to put them back in place in the post 
> kickstart script.
> 
> Thanks in advance for any help
> 
> 
> 
> 

-- 
Eric Doutreleau
I.N.T			| Tel	: +33 (0) 160764687
9 rue Charles Fourier	| Fax	: +33 (0) 160764321
91011 Evry   France	| email	: Eric Doutreleau int-evry fr