#!/bin/bash
#
# Filename: dist_keys.sh
# Depends on: copy-keys-v.4.exp
# Written by: WG 2009-02-04
# Updated 2009-08-01
# http://www.virtfoundry.com
# wgoodric@virtfoundry.com
#
# Generate SSH keys and distribute by calling copy-keys-v.4.exp
#
#
USER=`whoami`
pass=$1
KEYGEN="/usr/bin/ssh-keygen"
RSA_KEY="id_rsa"
HOME="/home/$USER"
DIR=".ssh"
#
# Have I already been run here?
if [ -e $HOME/.dist_keys ]
then
    echo "This utility has already been run. Please propagate" 
    echo "new public keys manually using ssh-copy-id"
    exit
fi

#
if [ ! -s nodes.txt ]
then
    echo "nodes.txt not found or empty: Please populate nodes.txt with cluster nodes' hostnames"
    exit
fi

# Is expect here?
if [ ! -x /usr/bin/expect ]
then
    echo "I did not find the expect binary, please install expect"
    exit
fi

# Does our expect script exist? executable?
if [ ! -x $CMD ]
then
    echo "$CMD is either missing or not executable"
    exit
fi

#
echo "Generating SSH keys"$'\n'
if [ ! -d $HOME/$DIR ]
then
    mkdir $HOME/$DIR
    chmod 755 $HOME/$DIR
fi

#
$KEYGEN -q -t rsa -f $RSA_KEY -C '' -N ''
cp $RSA_KEY $HOME/$DIR
cp $RSA_KEY.pub $HOME/$DIR
chmod 600 $HOME/$DIR/$RSA_KEY
chmod 644 $HOME/$DIR/$RSA_KEY.pub
chown $USER -R $HOME/$DIR
rm -f $RSA_KEY $RSA_KEY.pub

#
CMD="./copy-keys-v.4.exp"
PREFX="meta"

# Ensure proper networking / hostfile setup here
# If not ping by hostname, error out with notify
# Get number of RAC hosts to set range here and ping them
echo "Checking node network connectivity..."$'\n'
while read host
do
    if ! ping -c 3 $host >/dev/null 2>&1
    then
        echo "I was unable to ping $host"
        echo "Please verify networking and /etc/hosts"
        exit
    fi
done < nodes.txt

#  Launch expect script on all RAC hosts to propagate public key
echo "Propagating public key to nodes..."$'\n'
{
while read host
do
    $CMD $USER $host $pass
done < nodes.txt
} > propagate-keys.log

touch $HOME/.dist_keys

echo "Finished - a log is available in propagate-keys.log"