#!/bin/bash

# for some reason not all systems have @base installed
yum install -y -q @base

# also make sure that a few other utilities are definitely installed
yum install -y -q unzip xz

# install some needed internal networking configurations
yum install -y dnsmasq puppet

# install specific versions of puppet modules
puppet module install puppetlabs-stdlib -v 4.5.1
puppet module install puppetlabs-concat -v 1.2.0
puppet module install lex-dnsmasq -v 2.6.1

# script requires information about subdomain
if [ -z "$1" ]; then
    >&2 echo "Please provide the subdomain to Vagrant"
    exit 1
fi

# write the subdomain information into a custom facter fact
mkdir -p /etc/facter/facts.d/
echo "subdomain=${1}" > /etc/facter/facts.d/subdomain.txt

# remove current networking configurations
rm -f /etc/sysconfig/network-scripts/{ifcfg,route}-{eth,docker}*

# final bits
puppet apply /vagrant/confignetwork.pp

# so that cloud-init doesn't futz with our resolv config after we've
# configured it
chattr +i /etc/resolv.conf

# don't let cloud-init do funny things to our routing
chattr +i /etc/sysconfig/network-scripts/route-eth0

# setup the needed routing
cat <<EOL >> /etc/rc.d/post-cloud-init
#!/bin/bash

# always force puppet to rerun
/usr/bin/puppet apply /vagrant/confignetwork.pp
EOL

chmod +x /etc/rc.d/post-cloud-init

systemd_init() {
    # create a post-cloud-init.service and enable it
    cat <<EOL > /etc/systemd/system/post-cloud-init.service
[Unit]
Description=Post cloud-init script (overwrites some cloud-init config)
After=cloud-init-local.service
Requires=cloud-init-local.service

[Service]
Type=oneshot
ExecStart=/etc/rc.d/post-cloud-init
TimeoutSec=0
#RemainAfterExit=yes
#SysVStartPriority=99

# Output needs to appear in instance console output
StandardOutput=journal+console

[Install]
WantedBy=multi-user.target
EOL

    /usr/bin/systemctl enable post-cloud-init.service
    chattr +i /etc/systemd/system/post-cloud-init.service
}

sysv_init() {
    # create the SysV init and enable it
    cat <<EOL > /etc/init.d/post-cloud-init
#!/bin/bash

### BEGIN INIT INFO
# Provides:         post-cloud-init
# Required-Start:   $local_fs $network $named $remote_fs cloud-init-local
# Should-Start:     $time
# Required-Stop:
# Should-Stop:
# Default-Start:    2 3 4 5
# Default-Stop:     0 1 6
# Short-Description:    Setup dnsmasq for LF Rackspace environment
# Description:      Setup dnsmasq for LF Rackspace environment after
#   cloud-init-local

# Return values acc. to LSB for all commands but status:
# 0       - success
# 1       - generic or unspecified error
# 2       - invalid or excess argument(s)
# 3       - unimplemented feature (e.g. "reload")
# 4       - user had insufficient privileges
# 5       - program is not installed
# 6       - program is not configured
# 7       - program is not running
# 8--199  - reserved (8--99 LSB, 100--149 distrib, 150--199 appl)
#
# Note that starting an already running service, stopping
# or restarting a not-running service as well as the restart
# with force-reload (in case signaling is not supported) are
# considered a success.

RETVAL=0

prog="post-cloud-init"

start() {
    echo -n $"Starting $prog: "
    /etc/rc.d/post-cloud-init
    RETVAL=$?
    return $RETVAL
}

stop() {
    echo -n $"Shutting down $prog:"
    # No-op
    RETVAL=7
    return $RETVAL
}

case "$1" in
    start)
        start
        RETVAL=$?
        ;;
    stop)
        stop
        RETVAL=$?
        ;;
    restart|try-restart|condrestart)
        start
        RETVAL=$?
        ;;
    status)
        echo -n $"Checking for service $prog: "
        # Return value is slightly different for the status command:
        # 0 - service up and running
        # 1 - service dead, but /var/run pid file exists
        # 2 - service dead, but /var/lock file exists
        # 3 - service not running (unused)
        # 4 - service status unknown :-(
        # 5--199 reserved (5-99 LSB, 100-149 distro, 150-199 appl.)
        RETVAL=4
        ;;
    *)
        echo "Usage: $0 {start|stop|status|try-restart|condrestart|restart|force-reload|reload}"
        RETVAL=3
        ;;
esac

exit $RETVAL
EOL
    chmod +x /etc/init.d/post-cloud-init

    /sbin/chkconfig --add post-cloud-init
    /sbin/chkconfig post-cloud-init on
}

echo "Checking distribution"
if [ `/usr/bin/facter operatingsystem` = "Fedora" ]; then
    echo "---> Fedora found"
    systemd_init
else
    if [ `/usr/bin/facter operatingsystemrelease | /bin/cut -d '.' -f1` = "7" ]; then
        echo "---> CentOS 7"
        systemd_init
    else
        echo "---> CentOS 6"
        sysv_init
    fi
fi

# vim: sw=4 ts=4 sts=4 et :