This utility can be used to configure an environment for a virtual
cluster. It sets up entries in /etc/hosts, creates the necessary
directory structure, and generates helper scripts.
Documentation for virtual clusters will come in a later patch.
---
.gitignore | 1 +
Makefile.am | 9 ++
tools/vcluster-setup.in | 286 +++++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 296 insertions(+), 0 deletions(-)
create mode 100644 tools/vcluster-setup.in
diff --git a/.gitignore b/.gitignore
index 393495e..2571df7 100644
--- a/.gitignore
+++ b/.gitignore
@@ -93,6 +93,7 @@
# tools
/tools/kvm-ifup
/tools/ensure-dirs
+/tools/vcluster-setup
# scripts
/scripts/gnt-backup
diff --git a/Makefile.am b/Makefile.am
index b1f3ab8..e7086d7 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -160,6 +160,7 @@ CLEANFILES = \
$(man_MANS) \
$(manhtml) \
tools/kvm-ifup \
+ tools/vcluster-setup
stamp-directories \
stamp-srclinks \
$(nodist_pkgpython_PYTHON) \
@@ -674,6 +675,9 @@ dist_tools_SCRIPTS = \
tools/xm-console-wrapper \
tools/master-ip-setup
+nodist_tools_SCRIPTS = \
+ tools/vcluster-setup
+
pkglib_python_scripts = \
daemons/import-export \
tools/check-cert-expired
@@ -715,6 +719,7 @@ EXTRA_DIST = \
$(pkglib_python_scripts) \
devel/upload.in \
tools/kvm-ifup.in \
+ tools/vcluster-setup.in \
$(docdot) \
$(docpng) \
$(docrst) \
@@ -1051,6 +1056,10 @@ devel/upload: devel/upload.in $(REPLACE_VARS_SED)
sed -f $(REPLACE_VARS_SED) < $< > $@
chmod u+x $@
+tools/vcluster-setup: tools/vcluster-setup.in $(REPLACE_VARS_SED)
+ sed -f $(REPLACE_VARS_SED) < $< > $@
+ chmod +x $@
+
daemons/%:: daemons/%.in $(REPLACE_VARS_SED)
sed -f $(REPLACE_VARS_SED) < $< > $@
chmod +x $@
diff --git a/tools/vcluster-setup.in b/tools/vcluster-setup.in
new file mode 100644
index 0000000..cba73ba
--- /dev/null
+++ b/tools/vcluster-setup.in
@@ -0,0 +1,286 @@
+#!/bin/bash
+#
+
+# Copyright (C) 2012 Google Inc.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+# General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+# 02110-1301, USA.
+
+set -e -u -o pipefail
+shopt -s extglob
+
+readonly self=$(readlink -f $0)
+readonly ensure_dirs=@PKGLIBDIR@/ensure-dirs
+readonly action_shortcuts=( start stop restart status )
+readonly default_nodecount=5
+readonly default_instcount=10
+readonly default_netprefix=192.0.2
+readonly default_netdev=eth0
+readonly cluster_name=cluster
+
+# IP address space:
+# Cluster: .1
+# Nodes: .10-.99
+# Instances: .100-.254
+readonly first_node_ipaddr_octet=10
+readonly first_inst_ipaddr_octet=100
+
+readonly max_node_count=$((first_inst_ipaddr_octet - first_node_ipaddr_octet))
+readonly max_instance_count=$((255 - first_inst_ipaddr_octet))
+
+usage() {
+ echo "Usage: $0 [-c <number>] [-i <number>] [-p <prefix>] [-n <netdev>]"\
+ '<directory>'
+ echo
+ echo 'Options:'
+ echo " -c Number of virtual nodes (defaults to $default_nodecount)"
+ echo " -i Number of instances (defaults to $default_instcount)"
+ echo " -p IPv4 network prefix (defaults to $default_netprefix)"
+ echo ' -n Network device for virtual IP addresses (defaults to'\
+ "$default_netdev)"
+}
+
+# Variables for options
+nodecount=$default_nodecount
+instcount=$default_instcount
+netprefix=$default_netprefix
+netdev=$default_netdev
+
+# Parse options
+while getopts :hc:p:n:i: opt; do
+ case "$opt" in
+ h)
+ usage
+ exit 0
+ ;;
+ c)
+ nodecount="$OPTARG"
+ if [[ "$nodecount" != +([0-9]) ]]; then
+ echo "Invalid node count number: $nodecount" >&2
+ exit 1
+ elif (( nodecount > max_node_count )); then
+ echo "Node count must be $max_node_count or lower" >&2
+ exit 1
+ fi
+ ;;
+ i)
+ instcount="$OPTARG"
+ if [[ "$instcount" != +([0-9]) ]]; then
+ echo "Invalid instance count number: $instcount" >&2
+ exit 1
+ elif (( instcount > max_instance_count )); then
+ echo "Instance count must be $max_instance_count or lower" >&2
+ exit 1
+ fi
+ ;;
+ p)
+ netprefix="$OPTARG"
+ if [[ "$netprefix" != +([0-9]).+([0-9]).+([0-9]) ]]; then
+ echo "Invalid network prefix: $netprefix" >&2
+ exit 1
+ fi
+ ;;
+ n)
+ netdev="$OPTARG"
+ if ! ip link show $netdev >/dev/null; then
+ echo "Invalid network device: $netdev" >&2
+ exit 1
+ fi
+ ;;
+ \?)
+ echo "Invalid option: -$OPTARG" >&2
+ usage >&2
+ exit 1
+ ;;
+ :)
+ echo "Option -$OPTARG requires an argument" >&2
+ usage >&2
+ exit 1
+ ;;
+ esac
+done
+
+shift $((OPTIND - 1))
+
+if [[ "$#" != 1 ]]; then
+ usage
+ exit 1
+fi
+
+readonly rootdir=$1; shift
+
+if [[ ! -d "$rootdir" ]]; then
+ echo "Directory '$rootdir' does not exist!" >&2
+ exit 1
+fi
+
+if (( $nodecount < 1 )); then
+ echo "Must create at least one node, currently requested $nodecount" >&2
+ exit 1
+fi
+
+node_hostname() {
+ local -r number="$1"
+
+ echo "node$((number + 1))"
+}
+
+instance_hostname() {
+ local -r number="$1"
+
+ echo "instance$((number + 1))"
+}
+
+node_ipaddr() {
+ local -r number="$1"
+
+ echo "$netprefix.$((first_node_ipaddr_octet + number))"
+}
+
+instance_ipaddr() {
+ local -r number="$1"
+
+ echo "$netprefix.$((first_inst_ipaddr_octet + number))"
+}
+
+setup_node() {
+ local -r number="$1"
+ local -r nodedir=$rootdir/$(node_hostname $number)
+
+ echo "Setting up node '$(node_hostname $number)' ..." >&2
+
+ if [[ ! -d $nodedir ]]; then
+ mkdir $nodedir
+ fi
+
+ mkdir -p \
+ $nodedir/etc/default \
+ $nodedir/var/lock\
+ $nodedir/var/{lib,log,run}/ganeti
+
+ GANETI_HOSTNAME=$(node_hostname $number) \
+ GANETI_ROOTDIR=$nodedir \
+ $ensure_dirs
+
+ local -r daemon_args="-b $(node_ipaddr $number)"
+
+ cat > $nodedir/etc/default/ganeti <<EOF
+# Default settings for virtual node $i
+NODED_ARGS='--no-mlock $daemon_args'
+MASTERD_ARGS=''
+RAPI_ARGS='$daemon_args'
+CONFD_ARGS='$daemon_args'
+
+export GANETI_ROOTDIR='$nodedir'
+export GANETI_HOSTNAME='$(node_hostname $number)'
+EOF
+
+ cat > $nodedir/cmd <<EOF
+#!/bin/bash
+
+export GANETI_ROOTDIR='$nodedir'
+export GANETI_HOSTNAME='$(node_hostname $number)'
+
+bash -c "\$*"
+EOF
+ chmod +x $nodedir/cmd
+}
+
+setup_all_nodes() {
+ for ((i=0; i < nodecount; ++i)); do
+ setup_node $i
+ done
+}
+
+setup_etc_hosts() {
+ echo 'Configuring /etc/hosts ...' >&2
+ (
+ set -e -u
+ local -r tmpfile=$(mktemp /etc/hosts.vcluster.XXXXX)
+ trap "rm -f $tmpfile" EXIT
+ {
+ egrep -v "^$netprefix.[[:digit:]]+[[:space:]]" /etc/hosts
+ echo "$netprefix.1 $cluster_name"
+ for ((i=0; i < nodecount; ++i)); do
+ echo "$(node_ipaddr $i) $(node_hostname $i)"
+ done
+ for ((i=0; i < instcount; ++i)); do
+ echo "$(instance_ipaddr $i) $(instance_hostname $i)"
+ done
+ } > $tmpfile && \
+ chmod 0644 $tmpfile && \
+ mv $tmpfile /etc/hosts && \
+ trap - EXIT
+ )
+}
+
+setup_network_interfaces() {
+ echo 'Configuring network ...' >&2
+ for ((i=0; i < nodecount; ++i)); do
+ local ipaddr="$(node_ipaddr $i)/32"
+ ip addr del "$ipaddr" dev "$netdev" || :
+ ip addr add "$ipaddr" dev "$netdev"
+ done
+}
+
+setup_scripts() {
+ echo 'Configuring helper scripts ...' >&2
+ for action in "${action_shortcuts[@]}"; do
+ {
+ echo '#!/bin/bash'
+ for ((i=0; i < nodecount; ++i)); do
+ local name=$(node_hostname $i)
+ echo "echo 'Action \"$action\" for virtual node \"$name\" ...'"
+ echo "$name/cmd /etc/init.d/ganeti $action"
+ done
+ } > $rootdir/$action-all
+ chmod +x $rootdir/$action-all
+ done
+}
+
+show_info() {
+ cat <<EOF
+Virtual cluster setup is complete.
+
+Root directory: $rootdir
+Cluster name: $cluster_name
+EOF
+
+ echo 'Nodes:' $(for ((i=0; i < nodecount; ++i)); do node_hostname $i; done)
+
+ cat <<EOF
+
+Initialize cluster:
+ cd $rootdir && node1/cmd gnt-cluster init --no-etc-hosts $cluster_name
+
+Change cluster settings:
+ cd $rootdir && node1/cmd gnt-cluster modify \\
+ --enabled-hypervisors=fake \\
+ --specs-disk-size=min=0 --specs-disk-count=min=0
+
+Add node:
+ cd $rootdir && node1/cmd gnt-node add --no-ssh-key-check node2
+EOF
+}
+
+setup_all_nodes
+setup_etc_hosts
+setup_network_interfaces
+setup_scripts
+show_info
+
+exit 0
+
+# vim: set sw=2 sts=2 et :
--
1.7.6
