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#!/bin/bash
#
# Copyright © 2015 Codethink Limited
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; version 2 of the License.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License along
# with this program; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
set +e
set -u
# COMPUTE_HOSTS, OBJECT_STORAGE_HOSTS and BLOCK_STORAGE_HOSTS
# are a list of 'name,ip' strings
#
# CONTROLLER HOST is a single 'name,ip' string
#
# TODO: ipv6
octet='\(\(2[0-5]\?[0-5]\?\)\|\(1[0-9]\?[0-9]\?\)\|\([0-9]\)\)'
valid_ip() {
echo -n "$1" | grep -xq $octet.$octet.$octet.$octet
}
valid_hostname() {
echo -n "$1" | grep -xq '[a-zA-Z0-9.-]\+'
}
append_host() {
# Validate ip and hostname and append to /etc/hosts
ip="$1"
hostname="$2"
if ! valid_ip "$ip"; then echo "ip, $ip" is malformed >&2; exit 1; fi
if ! valid_hostname "$hostname"; then echo "hostname, $hostname" is malformed >&2; exit 1; fi
echo "$ip" "$hostname" >> /etc/hosts
}
add_hosts() {
# Creates a host to ip mapping for a set of ips and adds them to /etc/hosts
# Each ip is assigned a hostname based on a prefix
# starting from prefix1.$STACK_ID up to prefixN.$STACK_ID
#
# STACK_ID is a unique suffix used to prevent hostname collisions
if [[ -z "$1" || -z "$2" ]]; then return; fi
ips="$1"
prefix="$2"
i=0
for ip in $ips
do
((i += 1))
append_host "$ip" "$prefix$i.$STACK_ID"
done
}
echo >> /etc/hosts # insert line break
append_host "$CONTROLLER_NODE_IP" "controller.$STACK_ID"
add_hosts "$COMPUTE_NODE_IPS" "compute"
add_hosts "$OBJECT_STORAGE_NODE_IPS" "object"
add_hosts "$BLOCK_STORAGE_NODE_IPS" "block"
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