#!/bin/bash
## If the container being cloned has one or more lxc.hook.clone
## specified, then the specified hooks will be called for the new
## container. The arguments passed to the clone hook are:
## 1. the container name
## 2. a section ('lxc')
## 3. hook type ('clone')
## 4. .. additional arguments to lxc-clone
## Environment variables:
## LXC_ROOTFS_MOUNT: path to the root filesystem
## LXC_CONFIG_FILE: path to config file
## LXC_SRC_NAME: old container name
## LXC_ROOTFS_PATH: path or device on which the root fs is located
set -f
VERBOSITY="0"
error() { echo "$@" 1>&2; }
debug() { [ "$VERBOSITY" -ge "$1" ] || return 0; shift; error "$@"; }
fail() { [ $# -eq 0 ] || error "$@"; exit 1; }
prep_usage() {
cat <<EOF
Usage: ${0##*/} [options] root-dir
root-dir is the root directory to operate on
[ -C | --cloud ]: do not configure a datasource. incompatible with
options marked '[ds]'
[ -i | --instance-id]: instance-id for cloud-init, defaults to random [ds]
[ -L | --nolocales ]: Do not copy host's locales into container
[ -S | --auth-key ]: ssh public key file for datasource [ds]
[ -u | --userdata ]: user-data file for cloud-init [ds]
[ -V | --vendordata ]: vendor-data file for cloud-init [ds]
EOF
}
prep() {
local short_opts="Chi:L:S:u:v"
local long_opts="auth-key:,cloud,help,hostid:,name:,nolocales:,create-etc-init,userdata:,vendordata:,verbose"
local getopt_out getopt_ret
getopt_out=$(getopt --name "${0##*/}" \
--options "${short_opts}" --long "${long_opts}" -- "$@" 2>/dev/null) ||
:
getopt_ret=$?
if [ $getopt_ret -eq 0 ]; then
eval set -- "${getopt_out}" ||
{ error "Unexpected error reading usage"; return 1; }
fi
local cur="" next=""
local vendordata="" userdata="" hostid="" authkey="" locales=1 cloud=0
local create_etc_init=0 name="ubuntucloud-lxc"
while [ $# -ne 0 ]; do
cur="$1"; next="$2";
case "$cur" in
-C|--cloud) cloud=1;;
-h|--help) prep_usage; return 0;;
--name) name="$next";;
-i|--hostid) hostid="$next";;
-L|--nolocales) locales=0;;
--create-etc-init) create_etc_init=1;;
-S|--auth-key)
[ -f "$next" ] ||
{ error "--auth-key: '$next' not a file"; return 1; }
authkey="$next";;
-V|--vendordata)
[ -f "$next" ] ||
{ error "--vendordata: '$next' not a file"; return 1; }
vendordata="$next";;
-u|--userdata)
[ -f "$next" ] ||
{ error "--userdata: '$next' not a file"; return 1; }
userdata="$next";;
-v|--verbose) VERBOSITY=$((${VERBOSITY}+1));;
--) shift; break;;
esac
shift;
done
[ $# -eq 1 ] || {
prep_usage 1>&2;
error "expected 1 arguments, got ($_LXC_HOOK) $#: $*";
return 1;
}
local root_d="$1";
if [ $getopt_ret -ne 0 -a "$_LXC_HOOK" = "clone" ]; then
# getopt above failed, but we were called from lxc clone. there might
# be multiple clone hooks and the args provided here not for us. This
# seems like not the greatest interface, so all we'll do is mention it.
error "${0##*}: usage failed, continuing with defaults"
fi
[ "$create_etc_init" -eq 0 ] ||
echo "#upstart needs help for overlayfs (LP: #1213925)." > \
"$root_d/etc/init/.overlayfs-upstart-helper" ||
{ error "failed to create /etc/init in overlay"; return 1; }
local seed_d=""
seed_d="$root_d/var/lib/cloud/seed/nocloud-net"
echo "$name" > "$root_d/etc/hostname" ||
{ error "failed to write /etc/hostname"; return 1; }
if [ $cloud -eq 1 ]; then
debug 1 "--cloud provided, not modifying seed in '$seed_d'"
else
if [ -z "$hostid" ]; then
hostid=$(uuidgen | cut -c -8) && [ -n "$hostid" ] ||
{ error "failed to get hostid"; return 1; }
fi
mkdir -p "$seed_d" ||
{ error "failed to create '$seed_d'"; return 1; }
echo "instance-id: lxc-$hostid" > "$seed_d/meta-data" ||
{ error "failed to write to $seed_d/meta-data"; return 1; }
echo "local-hostname: $name" >> "$seed_d/meta-data" ||
{ error "failed to write to $seed_d/meta-data"; return 1; }
if [ -n "$authkey" ]; then
{
echo "public-keys:" &&
sed -e '/^$/d' -e 's,^,- ,' "$authkey"
} >> "$seed_d/meta-data"
[ $? -eq 0 ] ||
{ error "failed to write public keys to metadata"; return 1; }
fi
local larch="usr/lib/locale/locale-archive"
if [ $locales -eq 1 ]; then
cp "/$larch" "$root_d/$larch" || {
error "failed to cp '/$larch' '$root_d/$larch'";
return 1;
}
fi
if [ -z "$MIRROR" ]; then
MIRROR="http://archive.ubuntu.com/ubuntu"
fi
if [ -n "$userdata" ]; then
cp "$userdata" "$seed_d/user-data"
else
{
local lc=$(locale | awk -F= '/LANG=/ {print $NF; }')
echo "#cloud-config"
echo "output: {all: '| tee -a /var/log/cloud-init-output.log'}"
echo "apt_mirror: $MIRROR"
echo "manage_etc_hosts: localhost"
[ -z "$LANG" ] || echo "locale: $LANG";
echo "password: ubuntu"
echo "chpasswd: { expire: false; }"
} > "$seed_d/user-data"
fi
[ $? -eq 0 ] || {
error "failed to write user-data write to '$seed_d/user-data'";
return 1;
}
if [ -n "$vendordata" ]; then
cp "$vendordata" "$seed_d/vendor-data" || {
error "failed copy vendordata to $seed_d/vendor-data";
return 1;
}
fi
fi
}
main() {
# main just joins 2 modes of being called. from user one from lxc clone
local _LXC_HOOK
if [ -n "$LXC_ROOTFS_MOUNT" -a "$3" = "clone" ]; then
_LXC_HOOK="clone"
local name="$1" create_etc_init=""
shift 3
# if mountpoint is overlayfs then add '--create-etc-init'
[ "${LXC_ROOTFS_PATH#overlayfs}" != "${LXC_ROOTFS_PATH}" ] &&
create_etc_init="--create-etc-init"
debug 1 prep "--name=$name" $create_etc_init "$LXC_ROOTFS_MOUNT" "$@"
prep "--name=$name" $create_etc_init "$LXC_ROOTFS_MOUNT" "$@"
else
_LXC_HOOK=""
prep "$@"
fi
return $?
}
main "$@"
# vi: ts=4 expandtab