rc.local

#!/bin/sh -e
# 
# rc.local 
#
# This script is executed at the end of each multiuser runlevel.
# Make sure that the script will "exit 0" on success or any other
# value on error.
#
# In order to enable or disable this script just change the execution
# bits.
#

# Create the host keys for the SSH server
for key_type in rsa dsa; do
    if [ ! -f /etc/ssh/ssh_host_${key_type}_key ]; then
        ssh-keygen -t ${key_type} -N '' -f /etc/ssh/ssh_host_${key_type}_key
    fi
done

if [ -e /etc/rc.d/sshd ]; then
    /etc/rc.d/sshd restart
else
    /etc/rc.d/sshd restart
fi

# simple attempt to get the user ssh key using the meta-data service
mkdir -p /root/.ssh
echo >> /root/.ssh/authorized_keys
/usr/local/bin/curl --retry 3 --retry-delay 10 -m 45 -s http://169.254.169.254/latest/meta-data/public-keys/0/openssh-key | grep 'ssh-rsa' >> /root/.ssh/authorized_keys
echo "AUTHORIZED_KEYS:"
echo "************************"
cat /root/.ssh/authorized_keys
echo "************************"

# set the hostname to something sensible
META_HOSTNAME="`/usr/local/bin/curl -s http://169.254.169.254/latest/meta-data/local-hostname`"
META_IP="`/usr/local/bin/curl -s http://169.254.169.254/latest/meta-data/local-ipv4`"

if [ ${META_HOSTNAME} = ${META_IP} ]; then
        META_HOSTNAME="`echo $META_HOSTNAME | sed -e 's/\./-/g' | xargs -I {} echo "ip-{}"`"
fi
       
hostname $META_HOSTNAME
echo >> /etc/hosts
echo "${META_IP}   ${META_HOSTNAME}" >> /etc/hosts

# check if the user-data is a script, and if so execute it
TMP_FILE="/tmp/user-data-$$"
/usr/local/bin/curl --retry 3 --retry-delay 10 -m 60 -o $TMP_FILE http://169.254.169.254/latest/user-data
if [ -s $TMP_FILE ]; then
    echo "Downloaded user data in $TMP_FILE"
    if [ "`head -n 2 $TMP_FILE`" = "#!" ]; then
        chmod 700 $TMP_FILE
        echo "User data is a script: executing it"
        $TMP_FILE > /root/user-data.out 2>&1
    fi 
fi     
   
exit 0