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Initial edition of article
If you intend to accomplish [[VE]]s [[Checkpointing and live migration|migration]] between nodes you have to generate ssh keys for these nodes and put these keys to the appropriate place on remote side. [[User:Kir|Kir]] has recently written a script to facilitate this operation. Take a look:
<pre>
#!/bin/bash
#
# Copyright (C) 2001, 2002, 2006 by SWsoft.
# Author: Kir Kolyshkin
#
# This script is used to put your public ssh keys to another host's
# authorized_keys[2], so you will be able to ssh login without entering
# a password. Key pairs are generated if needed, and connectivity
# is checked after putting the keys.
PROGNAME=`basename $0`
function usage()
{
echo "Usage: $PROGNAME [user@]IP [[user@]IP ...]" 1>&2
exit 0
}
# Check for correct number of parameters
test $# -gt 0 || usage;
SSH_KEYGEN=`which ssh-keygen`
if test $? -ne 0; then
# Error message is printed by 'which'
exit 1
fi
SSH_DIR=~/.ssh
if ! test -d $SSH_DIR; then
mkdir $SSH_DIR
fi
chmod 700 $SSH_DIR
if [ ! -f $SSH_DIR/identity ] || [ ! -f $SSH_DIR/identity.pub ]; then
echo "Generating ssh1 RSA keys - please wait..."
rm -f $SSH_DIR/identity $SSH_DIR/identity.pub
$SSH_KEYGEN -t rsa1 -f $SSH_DIR/identity -P ''
if [ $? -ne 0 ]; then
echo "Command \"$SSH_KEYGEN -t rsa1 -f $SSH_DIR/identity" \
"-P ''\" failed" 1>&2
exit 1
fi
else
echo "ssh1 RSA key is present"
fi
if [ ! -f $SSH_DIR/id_dsa ] || [ ! -f $SSH_DIR/id_dsa.pub ]; then
echo "Generating ssh2 DSA keys - please wait..."
rm -f $SSH_DIR/id_dsa $SSH_DIR/id_dsa.pub
$SSH_KEYGEN -t dsa -f $SSH_DIR/id_dsa -P ''
if test $? -ne 0; then
echo "Command \"$SSH_KEYGEN -t dsa -f $SSH_DIR/id_dsa" \
"-P ''\" failed" 1>&2
exit 1
fi
else
echo "ssh2 DSA key is present"
fi
SSH1_RSA_KEY=`cat $SSH_DIR/identity.pub`
SSH2_DSA_KEY=`cat $SSH_DIR/id_dsa.pub`
for IP in $*; do
echo "You will now be asked for password for $IP"
# set -x
ssh -oStrictHostKeyChecking=no $IP "mkdir -p ~/.ssh; chmod 700 ~/.ssh; \
echo \"$SSH1_RSA_KEY\" >> ~/.ssh/authorized_keys; \
echo \"$SSH2_DSA_KEY\" >> ~/.ssh/authorized_keys2; \
chmod 600 ~/.ssh/authorized_keys ~/.ssh/authorized_keys2"
# set +x
if test $? -eq 0; then
echo "Keys were put successfully"
else
echo "Error putting keys to $IP" 1>&2
fi
done
for IP in $*; do
for ver in 1 2; do
echo -n "Checking $IP connectivity by ssh$ver... "
ssh -q -oProtocol=${ver} -oBatchMode=yes \
-oStrictHostKeyChecking=no $IP /bin/true
if [ $? -eq 0 ]; then
echo "OK"
else
echo "failed" 1>&2
fi
done
done
</pre>
[[Category: HOWTO]]
<pre>
#!/bin/bash
#
# Copyright (C) 2001, 2002, 2006 by SWsoft.
# Author: Kir Kolyshkin
#
# This script is used to put your public ssh keys to another host's
# authorized_keys[2], so you will be able to ssh login without entering
# a password. Key pairs are generated if needed, and connectivity
# is checked after putting the keys.
PROGNAME=`basename $0`
function usage()
{
echo "Usage: $PROGNAME [user@]IP [[user@]IP ...]" 1>&2
exit 0
}
# Check for correct number of parameters
test $# -gt 0 || usage;
SSH_KEYGEN=`which ssh-keygen`
if test $? -ne 0; then
# Error message is printed by 'which'
exit 1
fi
SSH_DIR=~/.ssh
if ! test -d $SSH_DIR; then
mkdir $SSH_DIR
fi
chmod 700 $SSH_DIR
if [ ! -f $SSH_DIR/identity ] || [ ! -f $SSH_DIR/identity.pub ]; then
echo "Generating ssh1 RSA keys - please wait..."
rm -f $SSH_DIR/identity $SSH_DIR/identity.pub
$SSH_KEYGEN -t rsa1 -f $SSH_DIR/identity -P ''
if [ $? -ne 0 ]; then
echo "Command \"$SSH_KEYGEN -t rsa1 -f $SSH_DIR/identity" \
"-P ''\" failed" 1>&2
exit 1
fi
else
echo "ssh1 RSA key is present"
fi
if [ ! -f $SSH_DIR/id_dsa ] || [ ! -f $SSH_DIR/id_dsa.pub ]; then
echo "Generating ssh2 DSA keys - please wait..."
rm -f $SSH_DIR/id_dsa $SSH_DIR/id_dsa.pub
$SSH_KEYGEN -t dsa -f $SSH_DIR/id_dsa -P ''
if test $? -ne 0; then
echo "Command \"$SSH_KEYGEN -t dsa -f $SSH_DIR/id_dsa" \
"-P ''\" failed" 1>&2
exit 1
fi
else
echo "ssh2 DSA key is present"
fi
SSH1_RSA_KEY=`cat $SSH_DIR/identity.pub`
SSH2_DSA_KEY=`cat $SSH_DIR/id_dsa.pub`
for IP in $*; do
echo "You will now be asked for password for $IP"
# set -x
ssh -oStrictHostKeyChecking=no $IP "mkdir -p ~/.ssh; chmod 700 ~/.ssh; \
echo \"$SSH1_RSA_KEY\" >> ~/.ssh/authorized_keys; \
echo \"$SSH2_DSA_KEY\" >> ~/.ssh/authorized_keys2; \
chmod 600 ~/.ssh/authorized_keys ~/.ssh/authorized_keys2"
# set +x
if test $? -eq 0; then
echo "Keys were put successfully"
else
echo "Error putting keys to $IP" 1>&2
fi
done
for IP in $*; do
for ver in 1 2; do
echo -n "Checking $IP connectivity by ssh$ver... "
ssh -q -oProtocol=${ver} -oBatchMode=yes \
-oStrictHostKeyChecking=no $IP /bin/true
if [ $? -eq 0 ]; then
echo "OK"
else
echo "failed" 1>&2
fi
done
done
</pre>
[[Category: HOWTO]]
