/usr/sbin/maas-import-ephemerals is in maas-cluster-controller 1.2+bzr1373+dfsg-0ubuntu1~12.04.6.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
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#
# maas-import-ephemerals - sync and import ephemeral images
#
# Copyright (C) 2011-2012 Canonical
#
# Authors:
# Scott Moser <scott.moser@canonical.com>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as
# published by the Free Software Foundation, version 3 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 Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
VERBOSITY=0
REMOTE_IMAGES_MIRROR=${REMOTE_IMAGES_MIRROR:-https://maas.ubuntu.com/images}
# iSCSI targets configuration file.
SYS_TGT_CONF="/etc/tgt/targets.conf"
# Prefix for iSCSI target name.
TARGET_NAME_PREFIX="iqn.2004-05.com.ubuntu:maas:"
# TODO: What's this for? If set, it gets run on a downloaded disk.img,
# kernel, and initrd.
EPH_UPDATE_CMD=""
# TODO: DATA_DIR seems to be the root of a directory tree that's exposed over
# iSCSI for download by nodes. Can we confirm this?
DATA_DIR="/var/lib/maas/ephemeral"
# Optional configuration script that may set variables for use by this
# script. It gets sourced later on.
CONFIG="/etc/maas/import_ephemerals"
RELEASES="precise"
ARCHES="amd64/generic i386/generic armhf/highbank"
BUILD_NAME="ephemeral"
STREAM="released"
# DATA_DIR layout is like:
# tgt.conf
# tgt.conf.d/
# <name>.conf ->
# ../release/stream/arch/serial.conf
# release/
# stream/
# arch/
# serial/
# kernel
# disk.img
# initrd
# my.conf
error() { echo "$@" 1>&2; }
fail() { [ $# -eq 0 ] || error "$@"; exit 1; }
Usage() {
cat <<EOF
Usage: ${0##*/} [ options ] <<ARGUMENTS>>
Import ephemeral (enlistment/commissioning) images into maas.
Settings are read from $CONFIG.
EOF
}
bad_Usage() { Usage 1>&2; [ $# -eq 0 ] || error "$@"; exit 1; }
cleanup() {
[ -z "${TEMP_D}" -o ! -d "${TEMP_D}" ] || rm -Rf "${TEMP_D}"
}
debug() {
local level=${1}; shift;
[ "${level}" -gt "${VERBOSITY}" ] && return
error "${@}"
}
query_remote() {
# query /query data at REMOTE_IMAGES_MIRROR
# returns 7 values prefixed with 'r_'
local iarch=$1 irelease=$2 istream=$3 out=""
local burl="${REMOTE_IMAGES_MIRROR}/query"
local url="$burl/$irelease/$istream/${STREAM}-dl.current.txt"
local target="$TEMP_D/query/$release.$stream"
mkdir -p -- "$TEMP_D/query"
if [ ! -f "$TEMP_D/query/$release.$stream" ]; then
wget -q "$url" -O "$target.tmp" && mv "$target.tmp" "$target" ||
{ error "failed to get $url"; return 1; }
fi
r_release=""; r_stream=""; r_label=""; r_serial="";
r_arch=""; r_url=""; r_name=""
out=$(awk '-F\t' '$1 == release && $2 == stream && $5 == arch { print $3, $4, $6, $7 }' \
"arch=$iarch" "release=$irelease" "stream=$istream" \
"$target") && [ -n "$out" ] ||
return 1
set -- ${out}
r_release=$irelease
r_stream=$istream
r_label=$1;
r_serial=$2;
r_arch=$iarch
r_url=$3
r_name=$4
return
}
query_local() {
local iarch=$1 irelease=$2 istream=$3 out=""
local label="" name="" serial="" url=""
local found=""
for i in "${DATA_DIR}/"$irelease/$istream/$iarch/*/info; do
[ -f "$i" ] && found=$i
done
found=$(LC_ALL=C;
cd "${DATA_DIR}/$irelease/$istream/$iarch" 2>/dev/null || exit 0;
for d in [0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9]*; do
[ -f "$d/info" ] && f=$d; done;
[ -n "$f" ] && echo "$PWD/$f/info")
l_release=""; l_stream=""; l_label=""; l_serial="";
l_arch=""; l_url=""; l_name=""; l_dir="";
if [ -n "$found" ]; then
. "$found"
l_release="$release";
l_stream="$stream";
l_label="$label";
l_serial="$serial";
l_arch="$arch";
l_url="$url";
l_name="$name";
l_dir="${found%/*}";
fi
}
serial_gt() {
# is $1 a larger serial than $2 ?
local a=${1:-0} b=${2:-0}
case "$a" in
*.[0-9]) a="${a%.*}${a##*.}";;
esac
case "$b" in
*.[0-9]) b="${b%.*}${b##*.}";;
esac
[ $a -gt $b ]
}
prep_dir() {
local wd="$1" exdir="" tarball=""
shift
local release=$1 stream=$2 label=$3 serial=$4 arch=$5 url=$6 name=$7
local furl="$REMOTE_IMAGES_MIRROR/$url"
mkdir -p "$wd"
cat > "$wd/info" <<EOF
release=$release
stream=$stream
label=$label
serial=$serial
arch=$arch
url=$url
name=$name
EOF
# download
local cachepath="${TARBALL_CACHE_D}/${name}.tar.gz" rmtar=""
if [ -f "$cachepath" ]; then
tarball="${cachepath}"
elif [ -n "$TARBALL_CACHE_D" ]; then
mkdir -p "$TARBALL_CACHE_D"
debug 1 "downloading $name from $furl to local cache"
wget "$furl" --progress=dot:mega -O "${cachepath}.part$$" &&
mv "$cachepath.part$$" "$cachepath" || {
rm "$cachepath.part$$"
error "failed to download $furl";
return 1;
}
tarball="${cachepath}"
else
debug 1 "downloading $name from $furl"
tarball="$wd/dist.tar.gz"
wget "$furl" --progress=dot:mega -O "${tarball}" ||
{ error "failed to download $furl"; return 1; }
rmtar="$tarball"
fi
# Extract the tarball.
exdir="$wd/.xx"
mkdir -p "$exdir" &&
debug 1 "extracting tarball" &&
tar -Sxzf - -C "$exdir" < "$tarball" ||
{ error "failed to extract tarball from $furl"; return 1; }
# Look for our files in the extracted tarball.
local x="" img="" kernel="" initrd=""
for x in "$exdir/"*.img; do
[ -f "$x" ] && img="$x" && break
done
for x in "$exdir/kernel" "$exdir/"*-vmlinuz*; do
[ -f "$x" ] && kernel="$x" && break
done
for x in "$exdir/initrd" "$exdir/"*-initrd*; do
[ -f "$x" ] && initrd="$x" && break
done
# Rename/move files extracted from tarballs to the target dir.
[ -n "$img" ] || { error "failed to find image in $furl"; return 1; }
mv "$img" "$wd/disk.img" ||
{ error "failed to move extracted image to $wd/disk.img"; return 1; }
[ -z "$kernel" ] || mv "$kernel" "$wd/linux" ||
{ error "failed to move extracted kernel to $wd/linux"; return 1; }
[ -z "$initrd" ] || mv "$initrd" "$wd/initrd.gz" ||
{ error "failed to move extracted initrd to $wd/initrd.gz"; return 1; }
rm -Rf "$exdir" || { error "failed to cleanup extraction dir"; return 1; }
{ [ -z "$rmtar" ] || rm "$rmtar"; } ||
{ error "failed to remove temporary tarball $rmtar"; return 1; }
if [ -n "$EPH_UPDATE_CMD" ]; then
# update
debug 1 "invoking: ${EPH_UPDATE_CMD[*]} ./disk.img ./kernel ./initrd"
"${EPH_UPDATE_CMD[@]}" "$wd/disk.img" "$wd/kernel" "$wd/initrd" ||
{ error "failed to apply updates to $img"; return 1; }
else
[ -n "$kernel" -a -n "$initrd" ] || {
error "missing kernel or initrd in tarball. set \$EPH_UPDATE_CMD";
# TODO: Set it to what!?
return 1;
}
fi
return 0
}
write_tgt_conf() {
local file="$1" target_name="$2" image="$3"
shift 2;
local release=$1 stream=$2 label=$3 serial=$4 arch=$5 url=$6 name=$7
cat > "$file" <<EOF
<target ${target_name}>
readonly 1
backing-store "$image"
</target>
EOF
}
copy_first_available() {
# Copy file $1 or $2 (the first that is available) to destination $3.
local preferred_file="$1" alternate_file="$2" destination="$3"
local actual=""
if [ -f "${preferred_file}" ]; then
actual="${preferred_file}"
elif [ -f "${alternate_file}" ]; then
actual="${alternate_file}"
else
error "Could not copy to ${destination}."
error "Neither ${preferred_file} nor ${alternate_file} exists."
return 1
fi
cp -- "${actual}" "${destination}" ||
{ error "Could not copy ${actual} to ${destination}."; return 1; }
return 0
}
install_tftp_image() {
# Make image in directory $1, for architecture $2 and subarchitecture $3,
# and OS release $4, available over TFTP for netbooting nodes. Only the
# kernel and initrd are needed.
local src="$1" arch="$2" subarch="$3" release="$4" tmpdir=""
# Create image in a temporary directory; the installation process
# deletes it.
tmpdir="$(mktemp -d)"
copy_first_available "$src/linux" "$src/kernel" "$tmpdir/linux" ||
return 1
copy_first_available "$src/initrd.gz" "$src/initrd" "$tmpdir/initrd.gz" ||
return 1
local cmd out=""
cmd=( maas-provision install-pxe-image
"--arch=$arch" "--subarch=$subarch" "--release=$release"
--purpose="commissioning" --image="$tmpdir" )
debug 2 "${cmd[@]}"
out=$("${cmd[@]}" 2>&1) ||
{ error "cmd failed:" "${cmd[@]}"; error "$out"; return 1; }
}
short_opts="hciuv"
long_opts="help,verbose"
getopt_out=$(getopt --name "${0##*/}" \
--options "${short_opts}" --long "${long_opts}" -- "$@") &&
eval set -- "${getopt_out}" ||
bad_Usage
while [ $# -ne 0 ]; do
cur=${1}; next=${2};
case "$cur" in
-h|--help) Usage ; exit 0;;
-v|--verbose) VERBOSITY=$((${VERBOSITY}+1));;
--) shift; break;;
esac
shift;
done
[ ! -f "$CONFIG" ] || . "$CONFIG"
[ ! -f ".${CONFIG}" ] || . ".${CONFIG}"
mkdir -p "$DATA_DIR" "$DATA_DIR/.working" ||
fail "failed to make $DATA_DIR"
TEMP_D=$(mktemp -d "$DATA_DIR/.working/${0##*/}.XXXXXX") ||
fail "failed to make tempdir"
trap cleanup EXIT
tgt_conf_d="$DATA_DIR/tgt.conf.d"
tgt_conf="${DATA_DIR}/tgt.conf"
mkdir -p "$tgt_conf_d" ||
fail "failed to make directories"
if [ ! -f "${tgt_conf}" ]; then
cat > "${tgt_conf}" <<EOF
include ${DATA_DIR}/tgt.conf.d/*.conf
default-driver iscsi
EOF
fi
updates=0
for release in $RELEASES; do
for arch_tuple in $ARCHES; do
arch="${arch_tuple%%/*}"
subarch="${arch_tuple#*/}"
query_local "$arch" "$release" "$BUILD_NAME" ||
fail "failed to query local for $release/$arch"
query_remote "$arch" "$release" "$BUILD_NAME" ||
fail "remote query of $REMOTE_IMAGES_MIRROR failed"
info="rel: $r_release, arch: $arch: name: $r_name"
debug 2 "$info"
debug 2 "local serial=$l_serial l_name=$l_name dir=$l_dir"
debug 2 "remote serial=$r_serial r_name=$r_name url=$r_url"
# if remote is newer, need to update. Note that if there is no local
# data, 'l_serial' will be "", which serial_gt considers zero
if serial_gt "$r_serial" "$l_serial"; then
# an update is needed remote serial is newer than local
updates=$(($updates+1))
msg="updating [${l_name:+${l_name} to }$r_name]"
debug 0 "$release/$arch: $msg"
wd="${TEMP_D}/$release/$arch"
prep_dir "$wd" \
"$r_release" "$r_stream" "$r_label" \
"$r_serial" "$r_arch" "$r_url" "$r_name" ||
fail "failed to prepare image for $release/$arch"
final_d="${r_release}/${r_stream}/${r_arch}/${r_serial}"
fpfinal_d="${DATA_DIR}/${final_d}"
mkdir -p "${fpfinal_d}"
mv "$wd/"* "${fpfinal_d}/" ||
fail "failed to move contents to final directory ${fpfinal_d}"
name="${r_name}"
else
debug 0 "$release/$arch: up to date [$l_name]"
fpfinal_d="${l_dir}"
final_d="${l_release}/${l_stream}/${l_arch}/${l_serial}"
name="${l_name}"
fi
# Even if there was no need to update the image, we make sure it
# gets installed.
debug 1 "adding images for $release/$arch/$subarch to maas"
install_tftp_image "$fpfinal_d" "$arch" "$subarch" "$release" ||
fail "failed to install ftp image [$info]"
target_name="${TARGET_NAME_PREFIX}${name}"
rel_tgt="../${final_d}/tgt.conf"
# iscsi_update
write_tgt_conf "${fpfinal_d}/tgt.conf" "$target_name" \
"${fpfinal_d}/disk.img" ||
fail "failed to write tgt.conf for $release/$arch"
ln -sf "$rel_tgt" "${tgt_conf_d}/${name}.conf" ||
fail "failed to symlink ${name}.conf into place"
ver_out="${TEMP_D}/verify.${target_name}"
tgt-admin --conf "$SYS_TGT_CONF" --update "${target_name}" &&
tgt-admin --conf "$SYS_TGT_CONF" --show > "${ver_out}" &&
grep -q "^Target [0-9][0-9]*: ${target_name}" "${ver_out}" || {
mv "${fpfinal_d}/info" "${fpfinal_d}/info.failed"
tgt-admin --conf "$SYS_TGT_CONF" --delete "$target_name"
rm "${tgt_conf_d}/${name}.conf"
fail "failed tgt-admin add for $name"
}
done
done
## cleanup
# here, go through anything non-current,
# * remove the tgt config
# * if tgt-show has entry:
# * remove from tgt-admin by name && remove directories
# * else
# * remove directory
# vi: ts=4 expandtab
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