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#!/bin/bash
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#
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# Copyright (C) 2012 Google Inc.
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful, but
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# WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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# General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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# 02110-1301, USA.
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set -e -u -o pipefail
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shopt -s extglob
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readonly self=$(readlink -f $0)
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readonly ensure_dirs=@PKGLIBDIR@/ensure-dirs
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readonly action_shortcuts=( start stop restart status )
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readonly default_nodecount=5
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readonly default_instcount=10
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readonly default_netprefix=192.0.2
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readonly default_netdev=eth0
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readonly cluster_name=cluster
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# IP address space:
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# Cluster: .1
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# Nodes: .10-.99
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# Instances: .100-.254
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readonly first_node_ipaddr_octet=10
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readonly first_inst_ipaddr_octet=100
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readonly max_node_count=$((first_inst_ipaddr_octet - first_node_ipaddr_octet))
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readonly max_instance_count=$((255 - first_inst_ipaddr_octet))
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usage() {
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echo "Usage: $0 [-c <number>] [-i <number>] [-p <prefix>] [-n <netdev>]"\
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'<directory>'
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echo
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echo 'Options:'
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echo " -c Number of virtual nodes (defaults to $default_nodecount)"
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echo " -i Number of instances (defaults to $default_instcount)"
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echo " -p IPv4 network prefix (defaults to $default_netprefix)"
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echo ' -n Network device for virtual IP addresses (defaults to'\
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"$default_netdev)"
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}
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# Variables for options
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nodecount=$default_nodecount
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instcount=$default_instcount
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netprefix=$default_netprefix
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netdev=$default_netdev
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# Parse options
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while getopts :hc:p:n:i: opt; do
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case "$opt" in
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h)
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usage
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exit 0
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;;
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c)
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nodecount="$OPTARG"
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if [[ "$nodecount" != +([0-9]) ]]; then
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echo "Invalid node count number: $nodecount" >&2
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exit 1
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elif (( nodecount > max_node_count )); then
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echo "Node count must be $max_node_count or lower" >&2
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exit 1
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fi
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;;
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i)
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instcount="$OPTARG"
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if [[ "$instcount" != +([0-9]) ]]; then
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echo "Invalid instance count number: $instcount" >&2
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exit 1
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elif (( instcount > max_instance_count )); then
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echo "Instance count must be $max_instance_count or lower" >&2
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exit 1
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fi
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;;
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p)
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netprefix="$OPTARG"
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if [[ "$netprefix" != +([0-9]).+([0-9]).+([0-9]) ]]; then
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echo "Invalid network prefix: $netprefix" >&2
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exit 1
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fi
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;;
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n)
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netdev="$OPTARG"
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if ! ip link show $netdev >/dev/null; then
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echo "Invalid network device: $netdev" >&2
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exit 1
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fi
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;;
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\?)
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echo "Invalid option: -$OPTARG" >&2
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usage >&2
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exit 1
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;;
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:)
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echo "Option -$OPTARG requires an argument" >&2
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usage >&2
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exit 1
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;;
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esac
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done
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shift $((OPTIND - 1))
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if [[ "$#" != 1 ]]; then
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usage
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exit 1
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fi
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readonly rootdir=$1; shift
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if [[ ! -d "$rootdir" ]]; then
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echo "Directory '$rootdir' does not exist!" >&2
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exit 1
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fi
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if (( $nodecount < 1 )); then
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echo "Must create at least one node, currently requested $nodecount" >&2
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exit 1
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fi
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node_hostname() {
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local -r number="$1"
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echo "node$((number + 1))"
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}
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instance_hostname() {
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local -r number="$1"
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echo "instance$((number + 1))"
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}
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node_ipaddr() {
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local -r number="$1"
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echo "$netprefix.$((first_node_ipaddr_octet + number))"
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}
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instance_ipaddr() {
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local -r number="$1"
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echo "$netprefix.$((first_inst_ipaddr_octet + number))"
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}
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setup_node() {
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local -r number="$1"
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local -r nodedir=$rootdir/$(node_hostname $number)
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echo "Setting up node '$(node_hostname $number)' ..." >&2
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if [[ ! -d $nodedir ]]; then
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mkdir $nodedir
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fi
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mkdir -p \
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$nodedir/etc/default \
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$nodedir/var/lock\
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$nodedir/var/{lib,log,run}/ganeti
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GANETI_HOSTNAME=$(node_hostname $number) \
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GANETI_ROOTDIR=$nodedir \
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$ensure_dirs
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local -r daemon_args="-b $(node_ipaddr $number)"
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cat > $nodedir/etc/default/ganeti <<EOF
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# Default settings for virtual node $i
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NODED_ARGS='--no-mlock $daemon_args'
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MASTERD_ARGS=''
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RAPI_ARGS='$daemon_args'
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CONFD_ARGS='$daemon_args'
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export GANETI_ROOTDIR='$nodedir'
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export GANETI_HOSTNAME='$(node_hostname $number)'
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EOF
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cat > $nodedir/cmd <<EOF
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#!/bin/bash
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export GANETI_ROOTDIR='$nodedir'
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export GANETI_HOSTNAME='$(node_hostname $number)'
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bash -c "\$*"
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EOF
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chmod +x $nodedir/cmd
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}
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setup_all_nodes() {
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for ((i=0; i < nodecount; ++i)); do
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setup_node $i
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done
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}
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setup_etc_hosts() {
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echo 'Configuring /etc/hosts ...' >&2
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(
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set -e -u
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local -r tmpfile=$(mktemp /etc/hosts.vcluster.XXXXX)
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trap "rm -f $tmpfile" EXIT
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{
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egrep -v "^$netprefix.[[:digit:]]+[[:space:]]" /etc/hosts
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echo "$netprefix.1 $cluster_name"
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for ((i=0; i < nodecount; ++i)); do
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echo "$(node_ipaddr $i) $(node_hostname $i)"
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done
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for ((i=0; i < instcount; ++i)); do
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echo "$(instance_ipaddr $i) $(instance_hostname $i)"
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done
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} > $tmpfile && \
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chmod 0644 $tmpfile && \
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mv $tmpfile /etc/hosts && \
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trap - EXIT
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)
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}
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setup_network_interfaces() {
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echo 'Configuring network ...' >&2
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for ((i=0; i < nodecount; ++i)); do
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local ipaddr="$(node_ipaddr $i)/32"
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ip addr del "$ipaddr" dev "$netdev" || :
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ip addr add "$ipaddr" dev "$netdev"
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done
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}
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setup_scripts() {
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echo 'Configuring helper scripts ...' >&2
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for action in "${action_shortcuts[@]}"; do
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{
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echo '#!/bin/bash'
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for ((i=0; i < nodecount; ++i)); do
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local name=$(node_hostname $i)
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echo "echo 'Action \"$action\" for virtual node \"$name\" ...'"
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echo "$name/cmd /etc/init.d/ganeti $action"
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done
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} > $rootdir/$action-all
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chmod +x $rootdir/$action-all
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done
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}
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show_info() {
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cat <<EOF
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Virtual cluster setup is complete.
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Root directory: $rootdir
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Cluster name: $cluster_name
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EOF
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echo 'Nodes:' $(for ((i=0; i < nodecount; ++i)); do node_hostname $i; done)
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cat <<EOF
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Initialize cluster:
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cd $rootdir && node1/cmd gnt-cluster init --no-etc-hosts $cluster_name
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Change cluster settings:
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cd $rootdir && node1/cmd gnt-cluster modify \\
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--enabled-hypervisors=fake \\
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--specs-disk-size=min=0 --specs-disk-count=min=0
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Add node:
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cd $rootdir && node1/cmd gnt-node add --no-ssh-key-check node2
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EOF
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}
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setup_all_nodes
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setup_etc_hosts
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setup_network_interfaces
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setup_scripts
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show_info
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exit 0
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# vim: set sw=2 sts=2 et :
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