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Commit | Line | Data |
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71d3a659 SG |
1 | #!/bin/sh |
2 | ||
3 | # Client script for LXC container images. | |
4 | # | |
5 | # Copyright © 2014 Stéphane Graber <stgraber@ubuntu.com> | |
6 | # | |
7 | # This library is free software; you can redistribute it and/or | |
8 | # modify it under the terms of the GNU Lesser General Public | |
9 | # License as published by the Free Software Foundation; either | |
10 | # version 2.1 of the License, or (at your option) any later version. | |
11 | ||
12 | # This library is distributed in the hope that it will be useful, | |
13 | # but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
15 | # Lesser General Public License for more details. | |
16 | ||
17 | # You should have received a copy of the GNU Lesser General Public | |
18 | # License along with this library; if not, write to the Free Software | |
19 | # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 | |
20 | # USA | |
21 | ||
22 | set -eu | |
23 | ||
71d3a659 | 24 | LOCALSTATEDIR="@LOCALSTATEDIR@" |
f74e080c SG |
25 | LXC_HOOK_DIR="@LXCHOOKDIR@" |
26 | LXC_TEMPLATE_CONFIG="@LXCTEMPLATECONFIG@" | |
71d3a659 SG |
27 | |
28 | # Defaults | |
71d3a659 | 29 | DOWNLOAD_ARCH= |
f74e080c | 30 | DOWNLOAD_BUILD= |
7a930fe7 | 31 | DOWNLOAD_COMPAT_LEVEL=7 |
f74e080c | 32 | DOWNLOAD_DIST= |
71d3a659 | 33 | DOWNLOAD_FLUSH_CACHE="false" |
41670b35 | 34 | DOWNLOAD_FORCE_CACHE="false" |
f74e080c | 35 | DOWNLOAD_INTERACTIVE="false" |
dd2dbcb9 | 36 | DOWNLOAD_KEYID="0xE7FB0CAEC8173D669066514CBAEFF88C22F6E216" |
f74e080c | 37 | DOWNLOAD_LIST_IMAGES="false" |
71d3a659 | 38 | DOWNLOAD_MODE="system" |
b0f0932a | 39 | DOWNLOAD_READY_GPG="false" |
f74e080c SG |
40 | DOWNLOAD_RELEASE= |
41 | DOWNLOAD_SERVER="images.linuxcontainers.org" | |
42 | DOWNLOAD_SHOW_GPG_WARNING="true" | |
43 | DOWNLOAD_SHOW_HTTP_WARNING="true" | |
44 | DOWNLOAD_TARGET="system" | |
45 | DOWNLOAD_URL= | |
46 | DOWNLOAD_USE_CACHE="false" | |
47 | DOWNLOAD_VALIDATE="true" | |
48 | DOWNLOAD_VARIANT="default" | |
edb5452c | 49 | DOWNLOAD_TEMP= |
71d3a659 | 50 | |
f74e080c SG |
51 | LXC_MAPPED_GID= |
52 | LXC_MAPPED_UID= | |
71d3a659 SG |
53 | LXC_NAME= |
54 | LXC_PATH= | |
55 | LXC_ROOTFS= | |
71d3a659 | 56 | |
a9a53b50 | 57 | if [ -z "${DOWNLOAD_KEYSERVER:-}" ]; then |
832cb182 | 58 | DOWNLOAD_KEYSERVER="hkp://pool.sks-keyservers.net" |
a6a7c7d1 | 59 | |
832cb182 CB |
60 | # Deal with GPG over http proxy |
61 | if [ -n "${http_proxy:-}" ]; then | |
62 | DOWNLOAD_KEYSERVER="hkp://p80.pool.sks-keyservers.net:80" | |
41440801 | 63 | DOWNLOAD_GPG_PROXY="--keyserver-options http-proxy=\"${http_proxy}\"" |
832cb182 | 64 | fi |
4eb706b3 SG |
65 | fi |
66 | ||
207bf0e4 SG |
67 | # Make sure the usual locations are in PATH |
68 | export PATH=$PATH:/usr/sbin:/usr/bin:/sbin:/bin | |
69 | ||
71d3a659 SG |
70 | # Some useful functions |
71 | cleanup() { | |
832cb182 CB |
72 | if [ -d "${DOWNLOAD_TEMP}" ]; then |
73 | rm -Rf "${DOWNLOAD_TEMP}" | |
74 | fi | |
71d3a659 SG |
75 | } |
76 | ||
acabe1fa | 77 | wget_wrapper() { |
832cb182 CB |
78 | for _ in $(seq 3); do |
79 | if wget "$@"; then | |
80 | return 0 | |
81 | fi | |
82 | done | |
acabe1fa | 83 | |
832cb182 | 84 | return 1 |
acabe1fa SG |
85 | } |
86 | ||
71d3a659 | 87 | download_file() { |
832cb182 CB |
88 | if ! wget_wrapper -T 30 -q "https://${DOWNLOAD_SERVER}/$1" -O "$2" >/dev/null 2>&1; then |
89 | if ! wget_wrapper -T 30 -q "http://${DOWNLOAD_SERVER}/$1" -O "$2" >/dev/null 2>&1; then | |
90 | if [ "$3" = "noexit" ]; then | |
91 | return 1 | |
92 | else | |
93 | echo "ERROR: Failed to download http://${DOWNLOAD_SERVER}/$1" 1>&2 | |
94 | exit 1 | |
95 | fi | |
96 | elif [ "${DOWNLOAD_SHOW_HTTP_WARNING}" = "true" ]; then | |
97 | DOWNLOAD_SHOW_HTTP_WARNING="false" | |
98 | echo "WARNING: Failed to download the file over HTTPs" 1>&2 | |
99 | echo " The file was instead download over HTTP " 1>&2 | |
100 | echo "A server replay attack may be possible!" 1>&2 | |
71d3a659 | 101 | fi |
832cb182 | 102 | fi |
71d3a659 SG |
103 | } |
104 | ||
fad96766 | 105 | download_sig() { |
832cb182 CB |
106 | if ! download_file "$1" "$2" noexit; then |
107 | if [ "${DOWNLOAD_VALIDATE}" = "true" ]; then | |
108 | if [ "$3" = "normal" ]; then | |
109 | echo "ERROR: Failed to download http://${DOWNLOAD_SERVER}/$1" 1>&2 | |
110 | exit 1 | |
111 | else | |
112 | return 1 | |
113 | fi | |
114 | else | |
115 | return 0 | |
fad96766 | 116 | fi |
832cb182 | 117 | fi |
fad96766 DE |
118 | } |
119 | ||
71d3a659 | 120 | gpg_setup() { |
832cb182 CB |
121 | if [ "${DOWNLOAD_VALIDATE}" = "false" ]; then |
122 | return | |
123 | fi | |
124 | ||
125 | if [ "${DOWNLOAD_READY_GPG}" = "true" ]; then | |
126 | return | |
127 | fi | |
128 | ||
129 | echo "Setting up the GPG keyring" | |
130 | ||
131 | mkdir -p "${DOWNLOAD_TEMP}/gpg" | |
132 | chmod 700 "${DOWNLOAD_TEMP}/gpg" | |
133 | export GNUPGHOME="${DOWNLOAD_TEMP}/gpg" | |
134 | ||
135 | success= | |
136 | for _ in $(seq 3); do | |
18e18d4c | 137 | if gpg --keyserver "${DOWNLOAD_KEYSERVER}" ${DOWNLOAD_GPG_PROXY:-} \ |
409040e7 | 138 | --receive-keys "${DOWNLOAD_KEYID}" >/dev/null 2>&1; then |
832cb182 CB |
139 | success=1 |
140 | break | |
71d3a659 | 141 | fi |
832cb182 CB |
142 | break |
143 | done | |
71d3a659 | 144 | |
832cb182 CB |
145 | if [ -z "${success}" ]; then |
146 | echo "ERROR: Unable to fetch GPG key from keyserver" | |
147 | exit 1 | |
148 | fi | |
b0f0932a | 149 | |
832cb182 | 150 | DOWNLOAD_READY_GPG="true" |
71d3a659 SG |
151 | } |
152 | ||
153 | gpg_validate() { | |
832cb182 CB |
154 | if [ "${DOWNLOAD_VALIDATE}" = "false" ]; then |
155 | if [ "${DOWNLOAD_SHOW_GPG_WARNING}" = "true" ]; then | |
156 | echo "WARNING: Running without gpg validation!" 1>&2 | |
71d3a659 | 157 | fi |
832cb182 CB |
158 | DOWNLOAD_SHOW_GPG_WARNING="false" |
159 | return 0 | |
160 | fi | |
71d3a659 | 161 | |
832cb182 CB |
162 | if ! gpg --verify "$1" >/dev/null 2>&1; then |
163 | echo "ERROR: Invalid signature for $1" 1>&2 | |
164 | exit 1 | |
165 | fi | |
71d3a659 SG |
166 | } |
167 | ||
168 | in_userns() { | |
832cb182 CB |
169 | [ -e /proc/self/uid_map ] || { echo no; return; } |
170 | while read -r line; do | |
171 | fields="$(echo "$line" | awk '{ print $1 " " $2 " " $3 }')" | |
172 | if [ "${fields}" = "0 0 4294967295" ]; then | |
173 | echo no; | |
174 | return; | |
175 | fi | |
176 | if echo "${fields}" | grep -q " 0 1$"; then | |
177 | echo userns-root; | |
178 | return; | |
179 | fi | |
180 | done < /proc/self/uid_map | |
181 | ||
16a312e1 LP |
182 | if [ -e /proc/1/uid_map ]; then |
183 | if [ "$(cat /proc/self/uid_map)" = "$(cat /proc/1/uid_map)" ]; then | |
184 | echo userns-root | |
185 | return | |
186 | fi | |
187 | fi | |
832cb182 | 188 | echo yes |
71d3a659 SG |
189 | } |
190 | ||
191 | relevant_file() { | |
832cb182 CB |
192 | FILE_PATH="${LXC_CACHE_PATH}/$1" |
193 | ||
194 | if [ -e "${FILE_PATH}-${DOWNLOAD_MODE}" ]; then | |
195 | FILE_PATH="${FILE_PATH}-${DOWNLOAD_MODE}" | |
196 | fi | |
71d3a659 | 197 | |
832cb182 CB |
198 | if [ -e "${FILE_PATH}.${DOWNLOAD_COMPAT_LEVEL}" ]; then |
199 | FILE_PATH="${FILE_PATH}.${DOWNLOAD_COMPAT_LEVEL}" | |
200 | fi | |
201 | ||
202 | echo "${FILE_PATH}" | |
71d3a659 SG |
203 | } |
204 | ||
205 | usage() { | |
832cb182 | 206 | cat <<EOF |
71d3a659 SG |
207 | LXC container image downloader |
208 | ||
7d540a26 | 209 | Special arguments: |
832cb182 CB |
210 | [ -h | --help ]: Print this help message and exit |
211 | [ -l | --list ]: List all available images and exit | |
7d540a26 | 212 | |
71d3a659 SG |
213 | Required arguments: |
214 | [ -d | --dist <distribution> ]: The name of the distribution | |
215 | [ -r | --release <release> ]: Release name/version | |
216 | [ -a | --arch <architecture> ]: Architecture of the container | |
71d3a659 SG |
217 | |
218 | Optional arguments: | |
219 | [ --variant <variant> ]: Variant of the image (default: "default") | |
220 | [ --server <server> ]: Image server (default: "images.linuxcontainers.org") | |
221 | [ --keyid <keyid> ]: GPG keyid (default: 0x...) | |
d2e5c5d1 | 222 | [ --keyserver <keyserver> ]: GPG keyserver to use. Environment variable: DOWNLOAD_KEYSERVER |
71d3a659 SG |
223 | [ --no-validate ]: Disable GPG validation (not recommended) |
224 | [ --flush-cache ]: Flush the local copy (if present) | |
e145b7bb | 225 | [ --force-cache ]: Force the use of the local copy even if expired |
71d3a659 SG |
226 | |
227 | LXC internal arguments (do not pass manually!): | |
228 | [ --name <name> ]: The container name | |
229 | [ --path <path> ]: The path to the container | |
230 | [ --rootfs <rootfs> ]: The path to the container's rootfs | |
2133f58c SH |
231 | [ --mapped-uid <map> ]: A uid map (user namespaces) |
232 | [ --mapped-gid <map> ]: A gid map (user namespaces) | |
d2e5c5d1 TK |
233 | |
234 | Environment Variables: | |
235 | DOWNLOAD_KEYSERVER : The URL of the key server to use, instead of the default. | |
236 | Can be further overridden by using optional argument --keyserver | |
237 | ||
71d3a659 | 238 | EOF |
832cb182 | 239 | return 0 |
71d3a659 SG |
240 | } |
241 | ||
3f7be9d0 | 242 | if ! options=$(getopt -o d:r:a:hl -l dist:,release:,arch:,help,list,variant:,\ |
3cd988cc | 243 | server:,keyid:,keyserver:,no-validate,flush-cache,force-cache,name:,path:,\ |
3f7be9d0 | 244 | rootfs:,mapped-uid:,mapped-gid: -- "$@"); then |
832cb182 CB |
245 | usage |
246 | exit 1 | |
71d3a659 SG |
247 | fi |
248 | eval set -- "$options" | |
249 | ||
250 | while :; do | |
832cb182 CB |
251 | case "$1" in |
252 | -h|--help) usage && exit 1;; | |
253 | -l|--list) DOWNLOAD_LIST_IMAGES="true"; shift 1;; | |
254 | -d|--dist) DOWNLOAD_DIST="$2"; shift 2;; | |
255 | -r|--release) DOWNLOAD_RELEASE="$2"; shift 2;; | |
256 | -a|--arch) DOWNLOAD_ARCH="$2"; shift 2;; | |
257 | --variant) DOWNLOAD_VARIANT="$2"; shift 2;; | |
258 | --server) DOWNLOAD_SERVER="$2"; shift 2;; | |
259 | --keyid) DOWNLOAD_KEYID="$2"; shift 2;; | |
260 | --keyserver) DOWNLOAD_KEYSERVER="$2"; shift 2;; | |
261 | --no-validate) DOWNLOAD_VALIDATE="false"; shift 1;; | |
262 | --flush-cache) DOWNLOAD_FLUSH_CACHE="true"; shift 1;; | |
263 | --force-cache) DOWNLOAD_FORCE_CACHE="true"; shift 1;; | |
264 | --name) LXC_NAME="$2"; shift 2;; | |
265 | --path) LXC_PATH="$2"; shift 2;; | |
266 | --rootfs) LXC_ROOTFS="$2"; shift 2;; | |
267 | --mapped-uid) LXC_MAPPED_UID="$2"; shift 2;; | |
268 | --mapped-gid) LXC_MAPPED_GID="$2"; shift 2;; | |
269 | *) break;; | |
270 | esac | |
71d3a659 SG |
271 | done |
272 | ||
273 | # Check for required binaries | |
274 | for bin in tar xz wget; do | |
832cb182 CB |
275 | if ! command -V "${bin}" >/dev/null 2>&1; then |
276 | echo "ERROR: Missing required tool: ${bin}" 1>&2 | |
277 | exit 1 | |
278 | fi | |
71d3a659 SG |
279 | done |
280 | ||
281 | # Check for GPG | |
3f7be9d0 | 282 | if [ "${DOWNLOAD_VALIDATE}" = "true" ]; then |
832cb182 CB |
283 | if ! command -V gpg >/dev/null 2>&1; then |
284 | echo "ERROR: Missing recommended tool: gpg" 1>&2 | |
285 | echo "You can workaround this by using --no-validate" 1>&2 | |
286 | exit 1 | |
287 | fi | |
71d3a659 SG |
288 | fi |
289 | ||
290 | # Check that we have all variables we need | |
3f7be9d0 | 291 | if [ -z "${LXC_NAME}" ] || [ -z "${LXC_PATH}" ] || [ -z "${LXC_ROOTFS}" ]; then |
832cb182 CB |
292 | if [ "${DOWNLOAD_LIST_IMAGES}" != "true" ]; then |
293 | echo "ERROR: Please pass the name, path, and rootfs for the container" 1>&2 | |
294 | exit 1 | |
295 | fi | |
71d3a659 SG |
296 | fi |
297 | ||
3f7be9d0 | 298 | USERNS="$(in_userns)" |
f74e080c | 299 | |
3f7be9d0 | 300 | if [ "${USERNS}" != "no" ]; then |
832cb182 CB |
301 | if [ "${USERNS}" = "yes" ]; then |
302 | if [ -z "${LXC_MAPPED_UID}" ] || [ "${LXC_MAPPED_UID}" = "-1" ]; then | |
303 | echo "ERROR: In a user namespace without a map" 1>&2 | |
304 | exit 1 | |
71d3a659 | 305 | fi |
832cb182 CB |
306 | DOWNLOAD_MODE="user" |
307 | DOWNLOAD_TARGET="user" | |
308 | else | |
309 | DOWNLOAD_MODE="user" | |
310 | DOWNLOAD_TARGET="system" | |
311 | fi | |
71d3a659 SG |
312 | fi |
313 | ||
832cb182 CB |
314 | if [ -z "${DOWNLOAD_DIST}" ] || [ -z "${DOWNLOAD_RELEASE}" ] || [ -z "${DOWNLOAD_ARCH}" ]; then |
315 | DOWNLOAD_INTERACTIVE="true" | |
71d3a659 SG |
316 | fi |
317 | ||
318 | # Trap all exit signals | |
319 | trap cleanup EXIT HUP INT TERM | |
843a5874 | 320 | |
edb5452c SC |
321 | # /tmp may be mounted in tmpfs or noexec |
322 | if mountpoint -q /tmp; then | |
832cb182 | 323 | DOWNLOAD_TEMP="${LXC_PATH}" |
edb5452c SC |
324 | fi |
325 | ||
3f7be9d0 | 326 | if ! command -V mktemp >/dev/null 2>&1; then |
832cb182 | 327 | DOWNLOAD_TEMP="${DOWNLOAD_TEMP}/tmp/lxc-download.$$" |
30c8676e CB |
328 | elif [ -n "${DOWNLOAD_TEMP}" ]; then |
329 | mkdir -p "${DOWNLOAD_TEMP}" | |
eb44984a | 330 | DOWNLOAD_TEMP="$(mktemp -p "${DOWNLOAD_TEMP}" -d)" |
30c8676e CB |
331 | else |
332 | DOWNLOAD_TEMP="${DOWNLOAD_TEMP}$(mktemp -d)" | |
843a5874 | 333 | fi |
71d3a659 | 334 | |
10a5fab6 | 335 | # Simply list images |
832cb182 CB |
336 | if [ "${DOWNLOAD_LIST_IMAGES}" = "true" ] || [ "${DOWNLOAD_INTERACTIVE}" = "true" ]; then |
337 | # Initialize GPG | |
338 | gpg_setup | |
339 | ||
340 | # Grab the index | |
341 | DOWNLOAD_INDEX_PATH="/meta/1.0/index-${DOWNLOAD_MODE}" | |
342 | ||
343 | echo "Downloading the image index" | |
344 | if ! download_file "${DOWNLOAD_INDEX_PATH}.${DOWNLOAD_COMPAT_LEVEL}" "${DOWNLOAD_TEMP}/index" noexit || | |
345 | ! download_sig "${DOWNLOAD_INDEX_PATH}.${DOWNLOAD_COMPAT_LEVEL}.asc" "${DOWNLOAD_TEMP}/index.asc" noexit; then | |
346 | download_file "${DOWNLOAD_INDEX_PATH}" "${DOWNLOAD_TEMP}/index" normal | |
347 | download_sig "${DOWNLOAD_INDEX_PATH}.asc" "${DOWNLOAD_TEMP}/index.asc" normal | |
348 | fi | |
349 | ||
350 | gpg_validate "${DOWNLOAD_TEMP}/index.asc" | |
351 | ||
352 | # Parse it | |
353 | echo "" | |
354 | echo "---" | |
355 | printf "DIST\tRELEASE\tARCH\tVARIANT\tBUILD\n" | |
356 | echo "---" | |
357 | while IFS=';' read -r f1 f2 f3 f4 f5 f6; do | |
358 | [ -n "${DOWNLOAD_DIST}" ] && [ "$f1" != "${DOWNLOAD_DIST}" ] && continue | |
359 | [ -n "${DOWNLOAD_RELEASE}" ] && [ "$f2" != "${DOWNLOAD_RELEASE}" ] && continue | |
360 | [ -n "${DOWNLOAD_ARCH}" ] && [ "$f3" != "${DOWNLOAD_ARCH}" ] && continue | |
361 | [ -n "${DOWNLOAD_VARIANT}" ] && [ "$f4" != "${DOWNLOAD_VARIANT}" ] && continue | |
362 | [ -z "${f5}" ] || [ -z "${f6}" ] && continue | |
363 | ||
364 | printf "%s\t%s\t%s\t%s\t%s\n" "${f1}" "${f2}" "${f3}" "${f4}" "${f5}" | |
365 | unset f1 f2 f3 f4 f5 f6 | |
366 | done < "${DOWNLOAD_TEMP}/index" | |
367 | echo "---" | |
368 | ||
369 | if [ "${DOWNLOAD_LIST_IMAGES}" = "true" ]; then | |
370 | exit 1 | |
371 | fi | |
b0f0932a | 372 | |
832cb182 CB |
373 | # Interactive mode |
374 | echo "" | |
b0f0932a | 375 | |
832cb182 CB |
376 | if [ -z "${DOWNLOAD_DIST}" ]; then |
377 | echo "Distribution: " | |
378 | read -r DOWNLOAD_DIST | |
379 | fi | |
b0f0932a | 380 | |
832cb182 CB |
381 | if [ -z "${DOWNLOAD_RELEASE}" ]; then |
382 | echo "Release: " | |
383 | read -r DOWNLOAD_RELEASE | |
384 | fi | |
b0f0932a | 385 | |
832cb182 CB |
386 | if [ -z "${DOWNLOAD_ARCH}" ]; then |
387 | echo "Architecture: " | |
388 | read -r DOWNLOAD_ARCH | |
389 | fi | |
b0f0932a | 390 | |
832cb182 | 391 | echo "" |
10a5fab6 SG |
392 | fi |
393 | ||
71d3a659 | 394 | # Setup the cache |
3f7be9d0 | 395 | if [ "${DOWNLOAD_TARGET}" = "system" ]; then |
832cb182 | 396 | LXC_CACHE_BASE="${LOCALSTATEDIR}/cache/lxc/" |
71d3a659 | 397 | else |
832cb182 | 398 | LXC_CACHE_BASE="${HOME}/.cache/lxc/" |
71d3a659 SG |
399 | fi |
400 | ||
6dc6f80b | 401 | # Allow the setting of the LXC_CACHE_PATH with the usage of environment variables. |
3f7be9d0 WG |
402 | LXC_CACHE_PATH="${LXC_CACHE_PATH:-"${LXC_CACHE_BASE}"}" |
403 | LXC_CACHE_PATH="${LXC_CACHE_PATH}/download/${DOWNLOAD_DIST}" | |
404 | LXC_CACHE_PATH="${LXC_CACHE_PATH}/${DOWNLOAD_RELEASE}/${DOWNLOAD_ARCH}/" | |
405 | LXC_CACHE_PATH="${LXC_CACHE_PATH}/${DOWNLOAD_VARIANT}" | |
b56661fe | 406 | |
3f7be9d0 | 407 | if [ -d "${LXC_CACHE_PATH}" ]; then |
832cb182 CB |
408 | if [ "${DOWNLOAD_FLUSH_CACHE}" = "true" ]; then |
409 | echo "Flushing the cache..." | |
410 | rm -Rf "${LXC_CACHE_PATH}" | |
411 | elif [ "${DOWNLOAD_FORCE_CACHE}" = "true" ]; then | |
412 | DOWNLOAD_USE_CACHE="true" | |
413 | else | |
414 | DOWNLOAD_USE_CACHE="true" | |
415 | if [ -e "$(relevant_file expiry)" ]; then | |
416 | if [ "$(cat "$(relevant_file expiry)")" -lt "$(date +%s)" ]; then | |
417 | echo "The cached copy has expired, re-downloading..." | |
418 | DOWNLOAD_USE_CACHE="false" | |
419 | fi | |
71d3a659 | 420 | fi |
832cb182 | 421 | fi |
71d3a659 SG |
422 | fi |
423 | ||
424 | # Download what's needed | |
3f7be9d0 | 425 | if [ "${DOWNLOAD_USE_CACHE}" = "false" ]; then |
832cb182 CB |
426 | # Initialize GPG |
427 | gpg_setup | |
428 | ||
429 | # Grab the index | |
430 | DOWNLOAD_INDEX_PATH="/meta/1.0/index-${DOWNLOAD_MODE}" | |
431 | ||
432 | echo "Downloading the image index" | |
433 | if ! download_file "${DOWNLOAD_INDEX_PATH}.${DOWNLOAD_COMPAT_LEVEL}" "${DOWNLOAD_TEMP}/index" noexit || | |
434 | ! download_sig "${DOWNLOAD_INDEX_PATH}.${DOWNLOAD_COMPAT_LEVEL}.asc" "${DOWNLOAD_TEMP}/index.asc" noexit; then | |
435 | download_file "${DOWNLOAD_INDEX_PATH}" "${DOWNLOAD_TEMP}/index" normal | |
436 | download_sig "${DOWNLOAD_INDEX_PATH}.asc" "${DOWNLOAD_TEMP}/index.asc" normal | |
437 | fi | |
438 | ||
439 | gpg_validate "${DOWNLOAD_TEMP}/index.asc" | |
440 | ||
441 | # Parse it | |
442 | while IFS=';' read -r f1 f2 f3 f4 f5 f6; do | |
443 | if [ "${f1}" != "${DOWNLOAD_DIST}" ] || \ | |
444 | [ "${f2}" != "${DOWNLOAD_RELEASE}" ] || \ | |
445 | [ "${f3}" != "${DOWNLOAD_ARCH}" ] || \ | |
446 | [ "${f4}" != "${DOWNLOAD_VARIANT}" ] || \ | |
447 | [ -z "${f6}" ]; then | |
448 | continue | |
71d3a659 SG |
449 | fi |
450 | ||
832cb182 CB |
451 | DOWNLOAD_BUILD="${f5}" |
452 | DOWNLOAD_URL="${f6}" | |
71d3a659 | 453 | |
832cb182 CB |
454 | unset f1 f2 f3 f4 f5 f6 |
455 | break | |
456 | done < "${DOWNLOAD_TEMP}/index" | |
3f7be9d0 | 457 | |
832cb182 CB |
458 | if [ -z "${DOWNLOAD_URL}" ]; then |
459 | echo "ERROR: Couldn't find a matching image" 1>&1 | |
460 | exit 1 | |
461 | fi | |
71d3a659 | 462 | |
832cb182 CB |
463 | if [ -d "${LXC_CACHE_PATH}" ] && [ -f "${LXC_CACHE_PATH}/build_id" ] && \ |
464 | [ "$(cat "${LXC_CACHE_PATH}/build_id")" = "${DOWNLOAD_BUILD}" ]; then | |
465 | echo "The cache is already up to date" | |
466 | echo "Using image from local cache" | |
467 | else | |
468 | # Download the actual files | |
469 | echo "Downloading the rootfs" | |
470 | download_file "${DOWNLOAD_URL}/rootfs.tar.xz" "${DOWNLOAD_TEMP}/rootfs.tar.xz" normal | |
471 | download_sig "${DOWNLOAD_URL}/rootfs.tar.xz.asc" "${DOWNLOAD_TEMP}/rootfs.tar.xz.asc" normal | |
472 | gpg_validate "${DOWNLOAD_TEMP}/rootfs.tar.xz.asc" | |
473 | ||
474 | echo "Downloading the metadata" | |
475 | download_file "${DOWNLOAD_URL}/meta.tar.xz" "${DOWNLOAD_TEMP}/meta.tar.xz" normal | |
476 | download_sig "$DOWNLOAD_URL/meta.tar.xz.asc" "${DOWNLOAD_TEMP}/meta.tar.xz.asc" normal | |
477 | gpg_validate "${DOWNLOAD_TEMP}/meta.tar.xz.asc" | |
478 | ||
479 | if [ -d "${LXC_CACHE_PATH}" ]; then | |
480 | rm -Rf "${LXC_CACHE_PATH}" | |
481 | fi | |
482 | mkdir -p "${LXC_CACHE_PATH}" | |
483 | mv "${DOWNLOAD_TEMP}/rootfs.tar.xz" "${LXC_CACHE_PATH}" | |
484 | if ! tar Jxf "${DOWNLOAD_TEMP}/meta.tar.xz" -C "${LXC_CACHE_PATH}"; then | |
485 | echo "ERROR: Invalid rootfs tarball." 2>&1 | |
486 | exit 1 | |
487 | fi | |
3f7be9d0 | 488 | |
832cb182 | 489 | echo "${DOWNLOAD_BUILD}" > "${LXC_CACHE_PATH}/build_id" |
71d3a659 | 490 | |
832cb182 CB |
491 | if [ -n "${LXC_MAPPED_UID}" ] && [ "${LXC_MAPPED_UID}" != "-1" ]; then |
492 | # As the script is run in strict mode (set -eu), all commands | |
493 | # exiting with non 0 would make the script stop. | |
494 | # || true or || : (more portable) prevents that. | |
495 | chown -R "${LXC_MAPPED_UID}" "${LXC_CACHE_BASE}" >/dev/null 2>&1 || : | |
71d3a659 | 496 | fi |
832cb182 CB |
497 | if [ -n "${LXC_MAPPED_GID}" ] && [ "${LXC_MAPPED_GID}" != "-1" ]; then |
498 | chgrp -R "${LXC_MAPPED_GID}" "${LXC_CACHE_BASE}" >/dev/null 2>&1 || : | |
71d3a659 | 499 | fi |
832cb182 CB |
500 | echo "The image cache is now ready" |
501 | fi | |
71d3a659 | 502 | else |
832cb182 | 503 | echo "Using image from local cache" |
71d3a659 SG |
504 | fi |
505 | ||
506 | # Unpack the rootfs | |
507 | echo "Unpacking the rootfs" | |
fecf101c SG |
508 | |
509 | EXCLUDES="" | |
510 | excludelist=$(relevant_file excludes) | |
511 | if [ -f "${excludelist}" ]; then | |
832cb182 CB |
512 | while read -r line; do |
513 | EXCLUDES="${EXCLUDES} --exclude=${line}" | |
514 | done < "${excludelist}" | |
71d3a659 SG |
515 | fi |
516 | ||
3f7be9d0 WG |
517 | # Do not surround ${EXCLUDES} by quotes. This does not work. The solution could |
518 | # use array but this is not POSIX compliant. The only POSIX compliant solution | |
519 | # is to use a function wrapper, but the latter can't be used here as the args | |
520 | # are dynamic. We thus need to ignore the warning brought by shellcheck. | |
521 | # shellcheck disable=SC2086 | |
832cb182 | 522 | tar --anchored ${EXCLUDES} --numeric-owner -xpJf "${LXC_CACHE_PATH}/rootfs.tar.xz" -C "${LXC_ROOTFS}" |
fecf101c | 523 | |
3f7be9d0 | 524 | mkdir -p "${LXC_ROOTFS}/dev/pts/" |
fecf101c | 525 | |
71d3a659 | 526 | # Setup the configuration |
3f7be9d0 WG |
527 | configfile="$(relevant_file config)" |
528 | fstab="$(relevant_file fstab)" | |
529 | if [ ! -e "${configfile}" ]; then | |
832cb182 CB |
530 | echo "ERROR: meta tarball is missing the configuration file" 1>&2 |
531 | exit 1 | |
71d3a659 SG |
532 | fi |
533 | ||
534 | ## Extract all the network config entries | |
832cb182 | 535 | sed -i -e "/lxc.net.0/{w ${LXC_PATH}/config-network" -e "d}" "${LXC_PATH}/config" |
71d3a659 SG |
536 | |
537 | ## Extract any other config entry | |
3f7be9d0 | 538 | sed -i -e "/lxc./{w ${LXC_PATH}/config-auto" -e "d}" "${LXC_PATH}/config" |
71d3a659 SG |
539 | |
540 | ## Append the defaults | |
832cb182 CB |
541 | { |
542 | echo "" | |
543 | echo "# Distribution configuration" | |
544 | cat "$configfile" | |
545 | } >> "${LXC_PATH}/config" | |
71d3a659 SG |
546 | |
547 | ## Add the container-specific config | |
832cb182 CB |
548 | { |
549 | echo "" | |
550 | echo "# Container specific configuration" | |
551 | if [ -e "${LXC_PATH}/config-auto" ]; then | |
552 | cat "${LXC_PATH}/config-auto" | |
3f7be9d0 | 553 | rm "${LXC_PATH}/config-auto" |
832cb182 CB |
554 | fi |
555 | if [ -e "${fstab}" ]; then | |
556 | echo "lxc.mount.fstab = ${LXC_PATH}/fstab" | |
557 | fi | |
558 | echo "lxc.uts.name = ${LXC_NAME}" | |
559 | } >> "${LXC_PATH}/config" | |
71d3a659 SG |
560 | |
561 | ## Re-add the previously removed network config | |
562 | if [ -e "${LXC_PATH}/config-network" ]; then | |
832cb182 CB |
563 | { |
564 | echo "" | |
565 | echo "# Network configuration" | |
566 | cat "${LXC_PATH}/config-network" | |
3f7be9d0 | 567 | rm "${LXC_PATH}/config-network" |
832cb182 | 568 | } >> "${LXC_PATH}/config" |
71d3a659 SG |
569 | fi |
570 | ||
571 | TEMPLATE_FILES="${LXC_PATH}/config" | |
572 | ||
573 | # Setup the fstab | |
3f7be9d0 | 574 | if [ -e "${fstab}" ]; then |
832cb182 CB |
575 | cp "${fstab}" "${LXC_PATH}/fstab" |
576 | TEMPLATE_FILES="${TEMPLATE_FILES};${LXC_PATH}/fstab" | |
71d3a659 SG |
577 | fi |
578 | ||
579 | # Look for extra templates | |
580 | if [ -e "$(relevant_file templates)" ]; then | |
832cb182 CB |
581 | while read -r line; do |
582 | fullpath="${LXC_ROOTFS}/${line}" | |
583 | [ ! -e "${fullpath}" ] && continue | |
584 | TEMPLATE_FILES="${TEMPLATE_FILES};${fullpath}" | |
585 | done < "$(relevant_file templates)" | |
71d3a659 SG |
586 | fi |
587 | ||
588 | # Replace variables in all templates | |
3f7be9d0 WG |
589 | OLD_IFS=${IFS} |
590 | IFS=";" | |
591 | for file in ${TEMPLATE_FILES}; do | |
592 | [ ! -f "${file}" ] && continue | |
832cb182 CB |
593 | sed -i "s#LXC_NAME#${LXC_NAME}#g" "${file}" |
594 | sed -i "s#LXC_PATH#${LXC_PATH}#g" "${file}" | |
595 | sed -i "s#LXC_ROOTFS#${LXC_ROOTFS}#g" "${file}" | |
596 | sed -i "s#LXC_TEMPLATE_CONFIG#${LXC_TEMPLATE_CONFIG}#g" "${file}" | |
597 | sed -i "s#LXC_HOOK_DIR#${LXC_HOOK_DIR}#g" "${file}" | |
71d3a659 | 598 | done |
3f7be9d0 | 599 | IFS=${OLD_IFS} |
71d3a659 | 600 | |
491a01cf | 601 | # prevent mingetty from calling vhangup(2) since it fails with userns on CentOS / Oracle |
3f7be9d0 | 602 | if [ -f "${LXC_ROOTFS}/etc/init/tty.conf" ]; then |
832cb182 | 603 | sed -i 's|mingetty|mingetty --nohangup|' "${LXC_ROOTFS}/etc/init/tty.conf" |
6e53ca56 SC |
604 | fi |
605 | ||
3f7be9d0 | 606 | if [ -n "${LXC_MAPPED_UID}" ] && [ "${LXC_MAPPED_UID}" != "-1" ]; then |
832cb182 | 607 | chown "${LXC_MAPPED_UID}" "${LXC_PATH}/config" "${LXC_PATH}/fstab" >/dev/null 2>&1 || : |
71d3a659 | 608 | fi |
832cb182 | 609 | |
3f7be9d0 | 610 | if [ -n "${LXC_MAPPED_GID}" ] && [ "${LXC_MAPPED_GID}" != "-1" ]; then |
832cb182 | 611 | chgrp "${LXC_MAPPED_GID}" "${LXC_PATH}/config" "${LXC_PATH}/fstab" >/dev/null 2>&1 || : |
2133f58c | 612 | fi |
71d3a659 SG |
613 | |
614 | if [ -e "$(relevant_file create-message)" ]; then | |
832cb182 CB |
615 | echo "" |
616 | echo "---" | |
617 | cat "$(relevant_file create-message)" | |
71d3a659 SG |
618 | fi |
619 | ||
620 | exit 0 |