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|
#!/bin/bash
# main autocluster script
#
# Copyright (C) Andrew Tridgell 2008
# Copyright (C) Martin Schwenke 2008
#
# 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 3 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, see <http://www.gnu.org/licenses/>.
##BEGIN-INSTALLDIR-MAGIC##
# There are better ways of doing this but not if you still want to be
# able to run straight out of a git tree. :-)
if [ -f "$0" ]; then
autocluster="$0"
else
autocluster=$(which "$0")
fi
if [ -L "$autocluster" ] ; then
autocluster=$(readlink "$autocluster")
fi
installdir=$(dirname "$autocluster")
##END-INSTALLDIR-MAGIC##
####################
# show program usage
usage ()
{
cat <<EOF
Usage: autocluster [OPTION] ... <COMMAND>
options:
-c <file> specify config file (default is "config")
-e <expr> execute <expr> and exit
-E <expr> execute <expr> and continue
-x enable script debugging
--dump dump config settings and exit
configuration options:
EOF
usage_config_options
cat <<EOF
commands:
base [ create | boot ] ...
cluster [ build |
destroy | undefine |
create | update_hosts | boot | setup ] ...
create base
create a base image
create cluster [ CLUSTERNAME ]
create a full cluster
create node CLUSTERNAME IP_OFFSET
(re)create a single cluster node
mount DISK
mount a qemu disk on mnt/
unmount | umount
unmount a qemu disk from mnt/
bootbase
boot the base image
EOF
exit 1
}
###############################
die () {
if [ "$no_sanity" = 1 ] ; then
fill_text 0 "WARNING: $*" >&2
else
fill_text 0 "ERROR: $*" >&2
exit 1
fi
}
announce ()
{
echo "######################################################################"
printf "# %-66s #\n" "$*"
echo "######################################################################"
echo ""
}
waitfor ()
{
local file="$1"
local msg="$2"
local timeout="$3"
local tmpfile=$(mktemp)
cat <<EOF >"$tmpfile"
spawn tail -n 10000 -f $file
expect -timeout $timeout -re "$msg"
EOF
export LANG=C
expect "$tmpfile"
rm -f "$tmpfile"
if ! grep -E "$msg" "$file" > /dev/null; then
echo "Failed to find \"$msg\" in \"$file\""
return 1
fi
return 0
}
###############################
# Indirectly call a function named by ${1}_${2}
call_func () {
local func="$1" ; shift
local type="$1" ; shift
local f="${func}_${type}"
if type -t "$f" >/dev/null && ! type -P "$f" >/dev/null ; then
"$f" "$@"
else
f="${func}_DEFAULT"
if type -t "$f" >/dev/null && ! type -P "$f" >/dev/null ; then
"$f" "$type" "$@"
else
die "No function defined for \"${func}\" \"${type}\""
fi
fi
}
# Note that this will work if you pass "call_func f" because the first
# element of the node tuple is the node type. Nice... :-)
for_each_node ()
{
local n
for n in $NODES ; do
"$@" $(IFS=: ; echo $n) || return 1
done
}
node_is_ctdb_node_DEFAULT ()
{
echo 0
}
hack_one_node_with ()
{
local filter="$1" ; shift
local node_type="$1"
local ip_offset="$2"
local name="$3"
local ctdb_node="$4"
$filter
local item="${node_type}:${ip_offset}${name:+:}${name}${ctdb_node:+:}${ctdb_node}"
nodes="${nodes}${nodes:+ }${item}"
}
# This also gets used for non-filtering iteration.
hack_all_nodes_with ()
{
local filter="$1"
local nodes=""
for_each_node hack_one_node_with "$filter"
NODES="$nodes"
}
list_all_cluster_nodes ()
{
# Local function only defined in subshell
(
print_node_name ()
{
echo "$3"
}
for_each_node print_node_name
) | sort
}
list_all_virsh_domains ()
{
local pattern="${CLUSTER_PATTERN:-${CLUSTER}[a-z]*[0-9]}"
local domains=$(virsh list --all | awk '{print $2}' | tail -n +3)
local d
for d in $domains ; do
case "$d" in
($pattern) echo "$d" ;;
esac
done | sort
}
virsh_cluster ()
{
local command="$1"
shift
local nodes=$(list_all_cluster_nodes)
local domains=$(list_all_virsh_domains)
if [ "$nodes" != "$domains" ] ; then
echo "WARNING: Found matching virsh domains that are not part of this cluster!"
echo
fi
local ret=0
local n
for n in $nodes ; do
virsh "$command" "$n" "$@" 2>&1 || ret=$?
done
return $ret
}
register_hook ()
{
local hook_var="$1"
local new_hook="$2"
eval "$hook_var=\"${!hook_var}${!hook_var:+ }${new_hook}\""
}
run_hooks ()
{
local hook_var="$1"
shift
local i
for i in ${!hook_var} ; do
$i "$@"
done
}
# Use with care, since this may clear some autocluster defaults.!
clear_hooks ()
{
local hook_var="$1"
eval "$hook_var=\"\""
}
##############################
# These hooks are intended to customise the value of $DISK. They have
# access to 1 argument ("base", "system", "shared") and the variables
# $VIRTBASE, $CLUSTER, $BASENAME (for "base"), $NAME (for "system"),
# $SHARED_DISK_NUM (for "shared"). A hook must be deterministic and
# should not be stateful, since they can be called multiple times for
# the same disk.
hack_disk_hooks=""
create_node_DEFAULT ()
{
local type="$1"
local ip_offset="$2"
local name="$3"
local ctdb_node="$4"
echo "Creating node \"$name\" (of type \"${type}\")"
create_node_COMMON "$name" "$ip_offset" "$type"
}
# common node creation stuff
create_node_COMMON ()
{
local NAME="$1"
local ip_offset="$2"
local type="$3"
local template_file="${4:-$NODE_TEMPLATE}"
if [ "$SYSTEM_DISK_FORMAT" != "qcow2" -a "$BASE_FORMAT" = "qcow2" ] ; then
die "Error: if BASE_FORMAT is \"qcow2\" then SYSTEM_DISK_FORMAT must also be \"qcow2\"."
fi
local IPNUM=$(($FIRSTIP + $ip_offset))
make_network_map
# Determine base image name. We use $DISK temporarily to allow
# the path to be hacked.
local DISK="${VIRTBASE}/${BASENAME}.${BASE_FORMAT}"
if [ "$BASE_PER_NODE_TYPE" = "yes" ] ; then
DISK="${VIRTBASE}/${BASENAME}-${type}.${BASE_FORMAT}"
fi
run_hooks hack_disk_hooks "base"
local base_disk="$DISK"
# Determine the system disk image name.
DISK="${VIRTBASE}/${CLUSTER}/${NAME}.${SYSTEM_DISK_FORMAT}"
run_hooks hack_disk_hooks "system"
local di="$DISK"
if [ "$DISK_FOLLOW_SYMLINKS" = "yes" -a -L "$DISK" ] ; then
di=$(readlink "$DISK")
fi
rm -f "$di"
local di_dirname="${di%/*}"
mkdir -p "$di_dirname"
case "$SYSTEM_DISK_FORMAT" in
qcow2)
echo "Creating the disk..."
qemu-img create -b "$base_disk" -f qcow2 "$di"
create_node_configure_image "$DISK" "$type"
;;
raw)
echo "Creating the disk..."
cp -v --sparse=always "$base_disk" "$di"
create_node_configure_image "$DISK" "$type"
;;
reflink)
echo "Creating the disk..."
cp -v --reflink=always "$base_disk" "$di"
create_node_configure_image "$DISK" "$type"
;;
mmclone)
echo "Creating the disk (using mmclone)..."
local base_snap="${base_disk}.snap"
[ -f "$base_snap" ] || mmclone snap "$base_disk" "$base_snap"
mmclone copy "$base_snap" "$di"
create_node_configure_image "$DISK" "$type"
;;
none)
echo "Skipping disk image creation as requested"
;;
*)
die "Error: unknown SYSTEM_DISK_FORMAT=\"${SYSTEM_DISK_FORMAT}\"."
esac
# Pull the UUID for this node out of the map.
UUID=$(awk "\$1 == $ip_offset {print \$2}" $uuid_map)
mkdir -p tmp
echo "Creating $NAME.xml"
substitute_vars $template_file tmp/$NAME.xml
# install the XML file
$VIRSH undefine $NAME > /dev/null 2>&1 || true
$VIRSH define tmp/$NAME.xml
}
create_node_configure_image ()
{
local disk="$1"
local type="$2"
diskimage mount "$disk"
setup_base "$type"
diskimage unmount
}
hack_network_map_hooks=""
# Uses: CLUSTER, NAME, NETWORKS, FIRSTIP, ip_offset
make_network_map ()
{
network_map="tmp/network_map.$NAME"
if [ -n "$CLUSTER" ] ; then
local md5=$(echo "$CLUSTER" | md5sum)
local nh=$(printf "%02x" $ip_offset)
local mac_prefix="02:${md5:0:2}:${md5:2:2}:00:${nh}:"
else
local mac_prefix="02:42:42:00:00:"
fi
local n
local count=1
for n in $NETWORKS ; do
local ch=$(printf "%02x" $count)
local mac="${mac_prefix}${ch}"
set -- ${n//,/ }
local ip_bits="$1" ; shift
local dev="$1" ; shift
local opts="$*"
local net="${ip_bits%/*}"
local netname="acnet_${net//./_}"
local ip="${net%.*}.${IPNUM}/${ip_bits#*/}"
local ipv6="fc00:${net//./:}::${IPNUM}/64"
# This can be used to override the variables in the echo
# statement below. The hook can use any other variables
# available in this function.
run_hooks hack_network_map_hooks
echo "${netname} ${dev} ${ip} ${ipv6} ${mac} ${opts}"
count=$(($count + 1))
done >"$network_map"
}
##############################
expand_nodes ()
{
# Expand out any abbreviations in NODES.
local ns=""
local n
for n in $NODES ; do
local t="${n%:*}"
local ips="${n#*:}"
case "$ips" in
*,*)
local i
for i in ${ips//,/ } ; do
ns="${ns}${ns:+ }${t}:${i}"
done
;;
*-*)
local i
for i in $(seq ${ips/-/ }) ; do
ns="${ns}${ns:+ }${t}:${i}"
done
;;
*)
ns="${ns}${ns:+ }${n}"
esac
done
NODES="$ns"
# Check IP addresses for duplicates.
local ip_offsets=":"
# This function doesn't modify anything...
get_ip_offset ()
{
[ "${ip_offsets/${ip_offset}}" != "$ip_offsets" ] && \
die "Duplicate IP offset in NODES - ${node_type}:${ip_offset}"
ip_offsets="${ip_offsets}${ip_offset}:"
}
hack_all_nodes_with get_ip_offset
# Determine node names and whether they're in the CTDB cluster
declare -A node_count
_get_name_ctdb_node ()
{
local count=$((${node_count[$node_type]:-0} + 1))
node_count[$node_type]=$count
name=$(call_func node_name_format "$node_type" "$CLUSTER" $count) || {
echo "ERROR: Node type \"${node_type}\" not defined!"
echo "Valid node types are:"
set | sed -n 's@^node_name_format_\(.*\) ().*@ \1@p'
exit 1
}
ctdb_node=$(call_func node_is_ctdb_node "$node_type")
}
hack_all_nodes_with _get_name_ctdb_node
}
##############################
sanity_check_cluster_name ()
{
[ -z "${CLUSTER//[A-Za-z0-9]}" ] || \
die "Cluster names should be restricted to the characters A-Za-z0-9. \
Some cluster filesystems have problems with other characters."
}
hosts_file=
cluster_nodelist_hacking ()
{
# Rework the NODES list
expand_nodes
# Build /etc/hosts and hack the names of the ctdb nodes
hosts_line_hack_name ()
{
local sname=""
local hosts_line
local ip_addr="${NETWORK_PRIVATE_PREFIX}.$(($FIRSTIP + $ip_offset))"
# Primary name for CTDB nodes is <CLUSTER>n<num>
if [ "$ctdb_node" = 1 ] ; then
num_ctdb_nodes=$(($num_ctdb_nodes + 1))
sname="${CLUSTER}n${num_ctdb_nodes}"
hosts_line="$ip_addr ${sname}.${ld} ${name}.${ld} $name $sname"
name="$sname"
else
hosts_line="$ip_addr ${name}.${ld} $name"
fi
# This allows you to add a function to your configuration file
# to modify hostnames (and other aspects of nodes). This
# function can access/modify $name (the existing name),
# $node_type and $ctdb_node (1, if the node is a member of the
# CTDB cluster, 0 otherwise).
if [ -n "$HOSTNAME_HACKING_FUNCTION" ] ; then
local old_name="$name"
$HOSTNAME_HACKING_FUNCTION
if [ "$name" != "$old_name" ] ; then
hosts_line="$ip_addr ${name}.${ld} $name"
fi
fi
echo "$hosts_line"
}
hosts_file="tmp/hosts.$CLUSTER"
{
local num_ctdb_nodes=0
local ld=$(echo $DOMAIN | tr A-Z a-z)
echo "# autocluster $CLUSTER"
hack_all_nodes_with hosts_line_hack_name
echo
} >$hosts_file
# Build /etc/ctdb/nodes
ctdb_nodes_line ()
{
[ "$ctdb_node" = 1 ] || return 0
echo "${NETWORK_PRIVATE_PREFIX}.$(($FIRSTIP + $ip_offset))"
num_nodes=$(($num_nodes + 1))
}
nodes_file="tmp/nodes.$CLUSTER"
local num_nodes=0
hack_all_nodes_with ctdb_nodes_line >$nodes_file
# Build /etc/ctdb/nodes.ipv6
ctdb_nodes_line_ipv6 ()
{
[ "$ctdb_node" = 1 ] || return 0
echo "fc00:${NETWORK_PRIVATE_PREFIX//./:}::$(($FIRSTIP + $ip_offset))"
num_nodes=$(($num_nodes + 1))
}
nodes_file_ipv6="tmp/nodes.$CLUSTER.ipv6"
local num_nodes=0
hack_all_nodes_with ctdb_nodes_line_ipv6 >$nodes_file_ipv6
# Build UUID map
uuid_map="tmp/uuid_map.$CLUSTER"
uuid_map_line ()
{
echo "${ip_offset} $(uuidgen) ${node_type}"
}
hack_all_nodes_with uuid_map_line >$uuid_map
}
create_cluster_hooks=
cluster_created_hooks=
cluster_create ()
{
# Use $1. If not set then use value from configuration file.
CLUSTER="${1:-${CLUSTER}}"
announce "cluster create \"${CLUSTER}\""
[ -n "$CLUSTER" ] || die "\$CLUSTER not set"
sanity_check_cluster_name
mkdir -p $VIRTBASE/$CLUSTER $KVMLOG tmp
# Run hooks before doing anything else.
run_hooks create_cluster_hooks
for_each_node call_func create_node
echo "Cluster $CLUSTER created"
echo ""
run_hooks cluster_created_hooks
}
cluster_created_hosts_message ()
{
echo "You may want to add this to your /etc/hosts file:"
cat $hosts_file
}
register_hook cluster_created_hooks cluster_created_hosts_message
cluster_destroy ()
{
announce "cluster destroy \"${CLUSTER}\""
[ -n "$CLUSTER" ] || die "\$CLUSTER not set"
virsh_cluster destroy || true
}
cluster_undefine ()
{
announce "cluster undefine \"${CLUSTER}\""
[ -n "$CLUSTER" ] || die "\$CLUSTER not set"
virsh_cluster undefine --managed-save || true
}
cluster_update_hosts ()
{
announce "cluster update_hosts \"${CLUSTER}\""
[ -n "$CLUSTER" ] || die "\$CLUSTER not set"
[ -n "$hosts_file" ] || hosts_file="tmp/hosts.${CLUSTER}"
[ -r "$hosts_file" ] || die "Missing hosts file \"${hosts_file}\""
# Building a general node name regexp is a bit cumbersome. :-)
local name_regexp="("
for i in $(set | sed -n -e "s@^\(node_name_format_.*\) ().*@\1@p") ; do
# Format node name with placeholders (remembering that "_" is
# not valid in a real cluster name)
local t=$("$i" "_" "0")
# now replace the placeholders with regexps - order is
# important here, since the cluster name can contain digits
t=$(sed -r -e "s@[[:digit:]]+@[[:digit:]]+@" -e "s@_@${CLUSTER}@" <<<"$t")
# add to the regexp
name_regexp="${name_regexp}${t}|"
done
name_regexp="${name_regexp}${CLUSTER}n[[:digit:]]+)"
local pat="# autocluster ${CLUSTER}\$|[[:space:]]${name_regexp}"
local t="/etc/hosts.${CLUSTER}"
grep -E "$pat" /etc/hosts >"$t" || true
if diff -B "$t" "$hosts_file" >/dev/null ; then
rm "$t"
return
fi
local old=/etc/hosts.old.autocluster
cp /etc/hosts "$old"
local new=/etc/hosts.new
grep -Ev "$pat" "$old" |
cat -s - "$hosts_file" >"$new"
mv "$new" /etc/hosts
echo "Made these changes to /etc/hosts:"
diff -u "$old" /etc/hosts || true
}
cluster_boot ()
{
announce "cluster boot \"${CLUSTER}\""
[ -n "$CLUSTER" ] || die "\$CLUSTER not set"
virsh_cluster start || return $?
local nodes=$(list_all_cluster_nodes)
# Wait for each node
local i
for i in $nodes ; do
waitfor "${KVMLOG}/serial.$i" "login:" 300 || {
vircmd destroy "$CLUSTER_PATTERN"
die "Failed to create cluster"
}
done
# Move past the last line of log output
echo ""
}
cluster_setup_tasks_DEFAULT ()
{
local stage="$1"
# By default nodes have no tasks
case "$stage" in
install_packages) echo "" ;;
setup_clusterfs) echo "" ;;
setup_node) echo "" ;;
setup_cluster) echo "" ;;
esac
}
cluster_setup ()
{
announce "cluster setup \"${CLUSTER}\""
[ -n "$CLUSTER" ] || die "\$CLUSTER not set"
local ssh="ssh -n -o StrictHostKeyChecking=no"
local setup_clusterfs_done=false
local setup_cluster_done=false
_cluster_setup_do_stage ()
{
local stage="$1"
local type="$2"
local ip_offset="$3"
local name="$4"
local ctdb_node="$5"
local tasks=$(call_func cluster_setup_tasks "$type" "$stage")
if [ -n "$tasks" ] ; then
# These tasks are only done on 1 node
case "$stage" in
setup_clusterfs)
if $setup_clusterfs_done ; then
return
else
setup_clusterfs_done=true
fi
;;
setup_cluster)
if $setup_cluster_done ; then
return
else
setup_cluster_done=true
fi
;;
esac
$ssh "$name" ./scripts/cluster_setup.sh "$stage" $tasks
fi
}
local stages="install_packages setup_clusterfs setup_node setup_cluster"
local stage
for stage in $stages ; do
for_each_node _cluster_setup_do_stage "$stage" || \
die "task $stage failed"
done
}
create_one_node ()
{
CLUSTER="$1"
local single_node_ip_offset="$2"
sanity_check_cluster_name
mkdir -p $VIRTBASE/$CLUSTER $KVMLOG tmp
for n in $NODES ; do
set -- $(IFS=: ; echo $n)
[ $single_node_ip_offset -eq $2 ] || continue
call_func create_node "$@"
echo "Requested node created"
echo ""
echo "You may want to update your /etc/hosts file:"
cat $hosts_file
break
done
}
###############################
# test the proxy setup
test_proxy() {
export http_proxy=$WEBPROXY
wget -O /dev/null $INSTALL_SERVER || \
die "Your WEBPROXY setting \"$WEBPROXY\" is not working"
echo "Proxy OK"
}
###################
kickstart_floppy_create_hooks=
guess_install_network ()
{
# Figure out IP address to use during base install. Default to
# the IP address of the 1st (private) network. If a gateway is
# specified then use the IP address associated with it.
INSTALL_IP=""
INSTALL_GW=""
local netname dev ip ipv6 mac opts
while read netname dev ip ipv6 mac opts; do
local o
for o in $opts ; do
case "$o" in
gw\=*)
INSTALL_GW="${o#gw=}"
INSTALL_IP="$ip"
esac
done
[ -n "$INSTALL_IP" ] || INSTALL_IP="$ip"
done <"$network_map"
}
# create base image
base_create()
{
local NAME="$BASENAME"
local DISK="${VIRTBASE}/${NAME}.${BASE_FORMAT}"
run_hooks hack_disk_hooks "base"
mkdir -p $KVMLOG
echo "Testing WEBPROXY $WEBPROXY"
test_proxy
local di="$DISK"
if [ "$DISK_FOLLOW_SYMLINKS" = "yes" -a -L "$DISK" ] ; then
di=$(readlink "$DISK")
fi
rm -f "$di"
local di_dirname="${di%/*}"
mkdir -p "$di_dirname"
echo "Creating the disk"
qemu-img create -f $BASE_FORMAT "$di" $DISKSIZE
rm -rf tmp
mkdir -p mnt tmp tmp/ISO
setup_timezone
IPNUM=$FIRSTIP
make_network_map
guess_install_network
echo "Creating kickstart file from template"
substitute_vars "$KICKSTART" "tmp/ks.cfg"
# $ISO gets $ISO_DIR prepended if it doesn't start with a leading '/'.
case "$ISO" in
(/*) : ;;
(*) ISO="${ISO_DIR}/${ISO}"
esac
echo "Creating kickstart floppy"
dd if=/dev/zero of=tmp/floppy.img bs=1024 count=1440
mkdosfs -n KICKSTART tmp/floppy.img
mount -o loop -t msdos tmp/floppy.img mnt
cp tmp/ks.cfg mnt
mount -o loop,ro $ISO tmp/ISO
echo "Setting up bootloader"
cp tmp/ISO/isolinux/isolinux.bin tmp
cp tmp/ISO/isolinux/vmlinuz tmp
cp tmp/ISO/isolinux/initrd.img tmp
run_hooks kickstart_floppy_create_hooks
umount tmp/ISO
umount mnt
UUID=`uuidgen`
substitute_vars $INSTALL_TEMPLATE tmp/$NAME.xml
rm -f $KVMLOG/serial.$NAME
# boot the install CD
$VIRSH create tmp/$NAME.xml
echo "Waiting for install to start"
sleep 2
# wait for the install to finish
if ! waitfor $KVMLOG/serial.$NAME "$KS_DONE_MESSAGE" $CREATE_BASE_TIMEOUT ; then
$VIRSH destroy $NAME
die "Failed to create base image ${DISK} after waiting for ${CREATE_BASE_TIMEOUT} seconds.
You may need to increase the value of CREATE_BASE_TIMEOUT.
Alternatively, the install might have completed but KS_DONE_MESSAGE
(currently \"${KS_DONE_MESSAGE}\")
may not have matched anything at the end of the kickstart output."
fi
$VIRSH destroy $NAME
ls -l $DISK
cat <<EOF
Install finished, base image $DISK created
You may wish to run
chcon -t virt_content_t $DISK
chattr +i $DISK
To ensure that this image does not change
Note that the root password has been set to $ROOTPASSWORD
EOF
}
###############################
# boot the base disk
base_boot() {
rm -rf tmp
mkdir -p tmp
NAME="$BASENAME"
DISK="${VIRTBASE}/${NAME}.${BASE_FORMAT}"
IPNUM=$FIRSTIP
make_network_map
CLUSTER="base"
diskimage mount $DISK
setup_base
diskimage unmount
UUID=`uuidgen`
echo "Creating $NAME.xml"
substitute_vars $BOOT_TEMPLATE tmp/$NAME.xml
# boot the base system
$VIRSH create tmp/$NAME.xml
}
######################################################################
# Updating a disk image...
diskimage ()
{
local func="$1"
shift
call_func diskimage_"$func" "$SYSTEM_DISK_ACCESS_METHOD" "$@"
}
# setup the files from $BASE_TEMPLATES/, substituting any variables
# based on the config
copy_base_dir_substitute_templates ()
{
local dir="$1"
local d="$BASE_TEMPLATES/$dir"
[ -d "$d" ] || return 0
local f
for f in $(cd "$d" && find . \! -name '*~' \( -type d -name .svn -prune -o -print \) ) ; do
f="${f#./}" # remove leading "./" for clarity
if [ -d "$d/$f" ]; then
# Don't chmod existing directory
if diskimage is_directory "/$f" ; then
continue
fi
diskimage mkdir_p "/$f"
else
echo " Install: $f"
diskimage substitute_vars "$d/$f" "/$f"
fi
diskimage chmod_reference "$d/$f" "/$f"
done
}
setup_base_hooks=
setup_base_ssh_keys ()
{
# this is needed as git doesn't store file permissions other
# than execute
# Note that we protect the wildcards from the local shell.
diskimage chmod 600 "/etc/ssh/*key" "/root/.ssh/*"
diskimage chmod 700 "/etc/ssh" "/root/.ssh" "/root"
if [ -r "$HOME/.ssh/id_rsa.pub" ]; then
echo "Adding $HOME/.ssh/id_rsa.pub to ssh authorized_keys"
diskimage append_text_file "$HOME/.ssh/id_rsa.pub" "/root/.ssh/authorized_keys"
fi
if [ -r "$HOME/.ssh/id_dsa.pub" ]; then
echo "Adding $HOME/.ssh/id_dsa.pub to ssh authorized_keys"
diskimage append_text_file "$HOME/.ssh/id_dsa.pub" "/root/.ssh/authorized_keys"
fi
}
register_hook setup_base_hooks setup_base_ssh_keys
setup_base_grub_conf ()
{
echo "Adjusting grub.conf"
local o="$EXTRA_KERNEL_OPTIONS" # For readability.
local grub_configs="/boot/grub/grub.conf"
if ! diskimage is_file "$grub_configs" ; then
grub_configs="/etc/default/grub /boot/grub2/grub.cfg"
fi
local c
for c in $grub_configs ; do
diskimage sed "$c" \
-e "s/console=ttyS0,19200/console=ttyS0,115200/" \
-e "s/ console=tty1//" -e "s/ rhgb/ norhgb/" \
-e "s/ nodmraid//" -e "s/ nompath//" \
-e "s/quiet/noapic divider=10${o:+ }${o}/g"
done
}
register_hook setup_base_hooks setup_base_grub_conf
setup_base()
{
local type="$1"
umask 022
echo "Copy base files"
copy_base_dir_substitute_templates "all"
if [ -n "$type" ] ; then
copy_base_dir_substitute_templates "$type"
fi
run_hooks setup_base_hooks
}
ipv4_prefix_to_netmask ()
{
local prefix="$1"
local div=$(($prefix / 8))
local mod=$(($prefix % 8))
local octet
for octet in 1 2 3 4 ; do
if [ $octet -le $div ] ; then
echo -n "255"
elif [ $mod -ne 0 -a $octet -eq $(($div + 1)) ] ; then
local shift=$((8 - $mod))
echo -n $(( (255 >> $shift << $shift) ))
else
echo -n 0
fi
if [ $octet -lt 4 ] ; then
echo -n '.'
fi
done
echo
}
# setup various networking components
setup_network()
{
# This avoids doing anything when we're called from boot_base().
if [ -z "$hosts_file" ] ; then
echo "Skipping network-related setup"
return
fi
echo "Setting up networks"
diskimage append_text_file "$hosts_file" "/etc/hosts"
echo "Setting up /etc/ctdb/nodes"
diskimage mkdir_p "/etc/ctdb"
if [ "$NETWORK_STACK" = "ipv4" ] ; then
diskimage put "$nodes_file" "/etc/ctdb/nodes"
elif [ "$NETWORK_STACK" = "ipv6" ] ; then
diskimage put "$nodes_file_ipv6" "/etc/ctdb/nodes"
elif [ "$NETWORK_STACK" = "dual" ] ; then
diskimage put "$nodes_file" "/etc/ctdb/nodes.ipv4"
diskimage put "$nodes_file_ipv6" "/etc/ctdb/nodes.ipv6"
diskimage put "$nodes_file" "/etc/ctdb/nodes"
else
die "Error: Invalid NETWORK_STACK value \"$NETWORK_STACK\"."
fi
[ "$WEBPROXY" = "" ] || {
diskimage append_text "export http_proxy=$WEBPROXY" "/etc/bashrc"
}
if [ -n "$NFSSHARE" -a -n "$NFS_MOUNTPOINT" ] ; then
echo "Enabling nfs mount of $NFSSHARE"
diskimage mkdir_p "$NFS_MOUNTPOINT"
diskimage append_text "$NFSSHARE $NFS_MOUNTPOINT nfs nfsvers=3,intr 0 0" "/etc/fstab"
fi
diskimage mkdir_p "/etc/yum.repos.d"
echo '@@@YUM_TEMPLATE@@@' | diskimage substitute_vars - "/etc/yum.repos.d/autocluster.repo"
diskimage rm_rf "/etc/udev/rules.d/70-persistent-net.rules"
echo "Setting up network interfaces: "
local netname dev ip ipv6 mac opts
while read netname dev ip ipv6 mac opts; do
echo " $dev"
local o gw addr mask
gw=""
for o in $opts ; do
case "$o" in
gw\=*)
gw="${o#gw=}"
esac
done
addr=${ip%/*}
mask=$(ipv4_prefix_to_netmask ${ip#*/})
cat <<EOF | \
diskimage put - "/etc/sysconfig/network-scripts/ifcfg-${dev}"
DEVICE=$dev
ONBOOT=yes
TYPE=Ethernet
IPADDR=$addr
NETMASK=$mask
HWADDR=$mac
IPV6INIT=yes
IPV6ADDR=$ipv6
${gw:+GATEWAY=}${gw}
EOF
# This goes to 70-persistent-net.rules
cat <<EOF
# Generated by autocluster
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="${mac}", ATTR{type}=="1", KERNEL=="eth*", NAME="${dev}"
EOF
done <"$network_map" |
diskimage put - "/etc/udev/rules.d/70-persistent-net.rules"
}
register_hook setup_base_hooks setup_network
setup_base_cluster_setup_config ()
{
local f
{
echo "# Generated by autocluster"
echo
# This is a bit of a hack. Perhaps these script belong
# elsewhere, since they no longer have templates?
for f in $(find "${BASE_TEMPLATES}/all/root/scripts" -type f |
xargs grep -l '^#config:') ; do
b=$(basename "$f")
echo "# $b"
local vs v
vs=$(sed -n 's@^#config: *@@p' "$f")
for v in $vs ; do
# This could substitute the values in directly using
# ${!v} but then no sanity checking is done to make
# sure variables are set.
echo "${v}=\"@@${v}@@\""
done
echo
done
} | diskimage substitute_vars - "/root/scripts/cluster_setup.config"
}
register_hook setup_base_hooks setup_base_cluster_setup_config
setup_timezone() {
[ -z "$TIMEZONE" ] && {
[ -r /etc/timezone ] && {
TIMEZONE=`cat /etc/timezone`
}
[ -r /etc/sysconfig/clock ] && {
. /etc/sysconfig/clock
TIMEZONE="$ZONE"
}
TIMEZONE="${TIMEZONE// /_}"
}
[ -n "$TIMEZONE" ] || \
die "Unable to determine TIMEZONE - please set in config"
}
# substite a set of variables of the form @@XX@@ for the shell
# variables $XX in a file.
#
# Indirect variables @@@XX@@@ (3 ats) specify that the variable should
# contain a filename whose contents are substituted, with variable
# substitution applied to those contents. If filename starts with '|'
# it is a command instead - however, quoting is extremely fragile.
substitute_vars() {(
infile="${1:-/dev/null}" # if empty then default to /dev/null
outfile="$2" # optional
tmp_out=$(mktemp)
cat "$infile" >"$tmp_out"
# Handle any indirects by looping until nothing changes.
# However, only handle 10 levels of recursion.
count=0
while : ; do
if ! _substitute_vars "$tmp_out" "@@@" ; then
rm -f "$tmp_out"
die "Failed to expand template $infile"
fi
# No old version of file means no changes made.
if [ ! -f "${tmp_out}.old" ] ; then
break
fi
rm -f "${tmp_out}.old"
count=$(($count + 1))
if [ $count -ge 10 ] ; then
rm -f "$tmp_out"
die "Recursion too deep in $infile - only 10 levels allowed!"
fi
done
# Now regular variables.
if ! _substitute_vars "$tmp_out" "@@" ; then
rm -f "$tmp_out"
die "Failed to expand template $infile"
fi
rm -f "${tmp_out}.old"
if [ -n "$outfile" ] ; then
mv "$tmp_out" "$outfile"
else
cat "$tmp_out"
rm -f "$tmp_out"
fi
)}
# Delimiter @@ means to substitute contents of variable.
# Delimiter @@@ means to substitute contents of file named by variable.
# @@@ supports leading '|' in variable value, which means to excute a
# command.
_substitute_vars() {(
tmp_out="$1"
delimiter="${2:-@@}"
# Get the list of variables used in the template. The grep
# gets rid of any blank lines and lines with extraneous '@'s
# next to template substitutions.
VARS=$(sed -n -e "s#[^@]*${delimiter}\([A-Z0-9_][A-Z0-9_]*\)${delimiter}[^@]*#\1\n#gp" "$tmp_out" |
grep '^[A-Z0-9_][A-Z0-9_]*$' |
sort -u)
tmp=$(mktemp)
for v in $VARS; do
# variable variables are fun .....
[ "${!v+x}" ] || {
rm -f $tmp
die "No substitution given for ${delimiter}$v${delimiter} in $infile"
}
s=${!v}
if [ "$delimiter" = "@@@" ] ; then
f=${s:-/dev/null}
c="${f#|}" # Is is a command, signified by a leading '|'?
if [ "$c" = "$f" ] ; then
# No leading '|', cat file.
s=$(cat -- "$f")
[ $? -eq 0 ] || {
rm -f $tmp
die "Could not substitute contents of file $f"
}
else
# Leading '|', execute command.
# Quoting problems here - using eval "$c" doesn't help.
s=$($c)
[ $? -eq 0 ] || {
rm -f $tmp
die "Could not execute command $c"
}
fi
fi
# escape some pesky chars
# This first one can be too slow if done using a bash
# variable pattern subsitution.
s=$(echo -n "$s" | tr '\n' '\001' | sed -e 's/\o001/\\n/g')
s=${s//#/\\#}
s=${s//&/\\&}
echo "s#${delimiter}${v}${delimiter}#${s}#g"
done > $tmp
# Get the in-place sed to make a backup of the old file.
# Remove the backup if it is the same as the resulting file -
# this acts as a flag to the caller that no changes were made.
sed -i.old -f $tmp "$tmp_out"
if cmp -s "${tmp_out}.old" "$tmp_out" ; then
rm -f "${tmp_out}.old"
fi
rm -f $tmp
)}
check_command() {
which $1 > /dev/null || die "Please install $1 to continue"
}
# Set a variable if it isn't already set. This allows environment
# variables to override default config settings.
defconf() {
local v="$1"
local e="$2"
[ "${!v+x}" ] || eval "$v=\"$e\""
}
load_config () {
local i
for i in "${installdir}/config.d/"*.defconf ; do
. "$i"
done
}
# Print the list of config variables defined in config.d/.
get_config_options () {( # sub-shell for local declaration of defconf()
local options=
defconf() { options="$options $1" ; }
load_config
echo $options
)}
# Produce a list of long options, suitable for use with getopt, that
# represent the config variables defined in config.d/.
getopt_config_options () {
local x=$(get_config_options | tr 'A-Z_' 'a-z-')
echo "${x// /:,}:"
}
# Unconditionally set the config variable associated with the given
# long option.
setconf_longopt () {
local longopt="$1"
local e="$2"
local v=$(echo "${longopt#--}" | tr 'a-z-' 'A-Z_')
# unset so defconf will set it
eval "unset $v"
defconf "$v" "$e"
}
# Dump all of the current config variables.
dump_config() {
local o
for o in $(get_config_options) ; do
echo "${o}=\"${!o}\""
done
exit 0
}
# $COLUMNS is set in interactive bash shells. It probably isn't set
# in this shell, so let's set it if it isn't.
: ${COLUMNS:=$(stty size 2>/dev/null | sed -e 's@.* @@')}
: ${COLUMNS:=80}
export COLUMNS
# Print text assuming it starts after other text in $startcol and
# needs to wrap before $COLUMNS - 2. Subsequent lines start at $startcol.
# Long "words" will extend past $COLUMNS - 2.
fill_text() {
local startcol="$1"
local text="$2"
local width=$(($COLUMNS - 2 - $startcol))
[ $width -lt 0 ] && width=$((78 - $startcol))
local out=""
local padding
if [ $startcol -gt 0 ] ; then
padding=$(printf "\n%${startcol}s" " ")
else
padding="
"
fi
while [ -n "$text" ] ; do
local orig="$text"
# If we already have output then arrange padding on the next line.
[ -n "$out" ] && out="${out}${padding}"
# Break the text at $width.
out="${out}${text:0:${width}}"
text="${text:${width}}"
# If we have left over text then the line break may be ugly,
# so let's check and try to break it on a space.
if [ -n "$text" ] ; then
# The 'x's stop us producing a special character like '(',
# ')' or '!'. Yuck - there must be a better way.
if [ "x${text:0:1}" != "x " -a "x${text: -1:1}" != "x " ] ; then
# We didn't break on a space. Arrange for the
# beginning of the broken "word" to appear on the next
# line but not if it will make us loop infinitely.
if [ "${orig}" != "${out##* }${text}" ] ; then
text="${out##* }${text}"
out="${out% *}"
else
# Hmmm, doing that would make us loop, so add the
# rest of the word from the remainder of the text
# to this line and let it extend past $COLUMNS - 2.
out="${out}${text%% *}"
if [ "${text# *}" != "$text" ] ; then
# Remember the text after the next space for next time.
text="${text# *}"
else
# No text after next space.
text=""
fi
fi
else
# We broke on a space. If it will be at the beginning
# of the next line then remove it.
text="${text# }"
fi
fi
done
echo "$out"
}
# Display usage text, trying these approaches in order.
# 1. See if it all fits on one line before $COLUMNS - 2.
# 2. See if splitting before the default value and indenting it
# to $startcol means that nothing passes $COLUMNS - 2.
# 3. Treat the message and default value as a string and just us fill_text()
# to format it.
usage_display_text () {
local startcol="$1"
local desc="$2"
local default="$3"
local width=$(($COLUMNS - 2 - $startcol))
[ $width -lt 0 ] && width=$((78 - $startcol))
default="(default \"$default\")"
if [ $((${#desc} + 1 + ${#default})) -le $width ] ; then
echo "${desc} ${default}"
else
local padding=$(printf "%${startcol}s" " ")
if [ ${#desc} -lt $width -a ${#default} -lt $width ] ; then
echo "$desc"
echo "${padding}${default}"
else
fill_text $startcol "${desc} ${default}"
fi
fi
}
# Display usage information for long config options.
usage_smart_display () {( # sub-shell for local declaration of defconf()
local startcol=33
defconf() {
local local longopt=$(echo "$1" | tr 'A-Z_' 'a-z-')
printf " --%-25s " "${longopt}=${3}"
usage_display_text $startcol "$4" "$2"
}
"$@"
)}
# Display usage information for long config options.
usage_config_options (){
usage_smart_display load_config
}
actions_init ()
{
actions=""
}
actions_add ()
{
actions="${actions}${actions:+ }$*"
}
actions_run ()
{
[ -n "$actions" ] || usage
local a
for a in $actions ; do
$a
done
}
######################################################################
post_config_hooks=
######################################################################
load_config
############################
# parse command line options
long_opts=$(getopt_config_options)
getopt_output=$(getopt -n autocluster -o "c:e:E:xh" -l help,dump -l "$long_opts" -- "$@")
[ $? != 0 ] && usage
use_default_config=true
# We do 2 passes of the options. The first time we just handle usage
# and check whether -c is being used.
eval set -- "$getopt_output"
while true ; do
case "$1" in
-c) shift 2 ; use_default_config=false ;;
-e) shift 2 ;;
-E) shift 2 ;;
--) shift ; break ;;
--dump|-x) shift ;;
-h|--help) usage ;; # Usage should be shown here for real defaults.
--*) shift 2 ;; # Assume other long opts are valid and take an arg.
*) usage ;; # shouldn't happen, so this is reasonable.
esac
done
config="./config"
$use_default_config && [ -r "$config" ] && . "$config"
eval set -- "$getopt_output"
while true ; do
case "$1" in
-c)
b=$(basename $2)
# force at least ./local_file to avoid accidental file
# from $PATH
. "$(dirname $2)/${b}"
# If $CLUSTER is unset then try to base it on the filename
if [ ! -n "$CLUSTER" ] ; then
case "$b" in
*.autocluster)
CLUSTER="${b%.autocluster}"
esac
fi
shift 2
;;
-e) no_sanity=1 ; run_hooks post_config_hooks ; eval "$2" ; exit ;;
-E) eval "$2" ; shift 2 ;;
-x) set -x; shift ;;
--dump) no_sanity=1 ; run_hooks post_config_hooks ; dump_config ;;
--) shift ; break ;;
-h|--help) usage ;; # Redundant.
--*)
# Putting --opt1|opt2|... into a variable and having case
# match against it as a pattern doesn't work. The | is
# part of shell syntax, so we need to do this. Look away
# now to stop your eyes from bleeding! :-)
x=",${long_opts}" # Now each option is surrounded by , and :
if [ "$x" != "${x#*,${1#--}:}" ] ; then
# Our option, $1, surrounded by , and : was in $x, so is legal.
setconf_longopt "$1" "$2"; shift 2
else
usage
fi
;;
*) usage ;; # shouldn't happen, so this is reasonable.
esac
done
run_hooks post_config_hooks
# catch errors
set -e
set -E
trap 'es=$?;
echo ERROR: failed in function \"${FUNCNAME}\" at line ${LINENO} of ${BASH_SOURCE[0]} with code $es;
exit $es' ERR
# check for needed programs
check_command expect
[ $# -lt 1 ] && usage
t="$1"
shift
case "$t" in
base)
actions_init
for t in "$@" ; do
case "$t" in
create|boot) actions_add "base_${t}" ;;
*) usage ;;
esac
done
actions_run
;;
cluster)
actions_init
for t in "$@" ; do
case "$t" in
destroy|undefine|create|update_hosts|boot|setup)
actions_add "cluster_${t}" ;;
build)
for t in destroy undefine create update_hosts boot setup ; do
actions_add "cluster_${t}"
done
;;
*) usage ;;
esac
done
cluster_nodelist_hacking
actions_run
;;
create)
t="$1"
shift
case "$t" in
base)
[ $# != 0 ] && usage
base_create
;;
cluster)
[ $# != 1 ] && usage
cluster_create "$1"
;;
node)
[ $# != 2 ] && usage
create_one_node "$1" "$2"
;;
*)
usage;
;;
esac
;;
mount)
[ $# != 1 ] && usage
diskimage mount "$1"
;;
unmount|umount)
[ $# != 0 ] && usage
diskimage unmount
;;
bootbase)
base_boot;
;;
*)
usage;
;;
esac
|