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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= |
3ab18243 | 31 | DOWNLOAD_COMPAT_LEVEL=4 |
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" | |
71d3a659 | 49 | |
f74e080c SG |
50 | LXC_MAPPED_GID= |
51 | LXC_MAPPED_UID= | |
71d3a659 SG |
52 | LXC_NAME= |
53 | LXC_PATH= | |
54 | LXC_ROOTFS= | |
71d3a659 | 55 | |
a9a53b50 | 56 | if [ -z "${DOWNLOAD_KEYSERVER:-}" ]; then |
a6a7c7d1 TK |
57 | DOWNLOAD_KEYSERVER="hkp://pool.sks-keyservers.net" |
58 | ||
59 | # Deal with GPG over http proxy | |
60 | if [ -n "${http_proxy:-}" ]; then | |
61 | DOWNLOAD_KEYSERVER="hkp://p80.pool.sks-keyservers.net:80" | |
62 | fi | |
4eb706b3 SG |
63 | fi |
64 | ||
207bf0e4 SG |
65 | # Make sure the usual locations are in PATH |
66 | export PATH=$PATH:/usr/sbin:/usr/bin:/sbin:/bin | |
67 | ||
71d3a659 SG |
68 | # Some useful functions |
69 | cleanup() { | |
3f7be9d0 WG |
70 | if [ -d "${DOWNLOAD_TEMP}" ]; then |
71 | rm -Rf "${DOWNLOAD_TEMP}" | |
71d3a659 SG |
72 | fi |
73 | } | |
74 | ||
acabe1fa SG |
75 | wget_wrapper() { |
76 | for i in $(seq 3); do | |
3f7be9d0 | 77 | if wget "$@"; then |
acabe1fa SG |
78 | return 0 |
79 | fi | |
80 | done | |
81 | ||
82 | return 1 | |
83 | } | |
84 | ||
71d3a659 | 85 | download_file() { |
3f7be9d0 WG |
86 | if ! wget_wrapper -T 30 -q "https://${DOWNLOAD_SERVER}/$1" -O "$2" >/dev/null 2>&1; then |
87 | if ! wget_wrapper -T 30 -q "http://${DOWNLOAD_SERVER}/$1" -O "$2" >/dev/null 2>&1; then | |
71d3a659 SG |
88 | if [ "$3" = "noexit" ]; then |
89 | return 1 | |
90 | else | |
fad96766 | 91 | echo "ERROR: Failed to download http://${DOWNLOAD_SERVER}/$1" 1>&2 |
71d3a659 SG |
92 | exit 1 |
93 | fi | |
3f7be9d0 | 94 | elif [ "${DOWNLOAD_SHOW_HTTP_WARNING}" = "true" ]; then |
71d3a659 SG |
95 | DOWNLOAD_SHOW_HTTP_WARNING="false" |
96 | echo "WARNING: Failed to download the file over HTTPs." 1>&2 | |
3f7be9d0 | 97 | echo " The file was instead download over HTTP. " 1>&2 |
71d3a659 SG |
98 | echo "A server replay attack may be possible!" 1>&2 |
99 | fi | |
100 | fi | |
101 | } | |
102 | ||
fad96766 | 103 | download_sig() { |
3f7be9d0 WG |
104 | if ! download_file "$1" "$2" noexit; then |
105 | if [ "${DOWNLOAD_VALIDATE}" = "true" ]; then | |
33aa351a SG |
106 | if [ "$3" = "normal" ]; then |
107 | echo "ERROR: Failed to download http://${DOWNLOAD_SERVER}/$1" 1>&2 | |
108 | exit 1 | |
109 | else | |
110 | return 1 | |
111 | fi | |
112 | else | |
113 | return 0 | |
114 | fi | |
fad96766 DE |
115 | fi |
116 | } | |
117 | ||
71d3a659 | 118 | gpg_setup() { |
3f7be9d0 | 119 | if [ "${DOWNLOAD_VALIDATE}" = "false" ]; then |
71d3a659 SG |
120 | return |
121 | fi | |
122 | ||
3f7be9d0 | 123 | if [ "${DOWNLOAD_READY_GPG}" = "true" ]; then |
b0f0932a SG |
124 | return |
125 | fi | |
126 | ||
71d3a659 SG |
127 | echo "Setting up the GPG keyring" |
128 | ||
3f7be9d0 WG |
129 | mkdir -p "${DOWNLOAD_TEMP}/gpg" |
130 | chmod 700 "${DOWNLOAD_TEMP}/gpg" | |
131 | export GNUPGHOME="${DOWNLOAD_TEMP}/gpg" | |
809a1539 SG |
132 | |
133 | success= | |
134 | for i in $(seq 3); do | |
3f7be9d0 WG |
135 | if gpg --keyserver "${DOWNLOAD_KEYSERVER}" \ |
136 | --recv-keys "${DOWNLOAD_KEYID}" >/dev/null 2>&1; then | |
809a1539 SG |
137 | success=1 |
138 | break | |
139 | fi | |
3f7be9d0 | 140 | break |
809a1539 SG |
141 | done |
142 | ||
3f7be9d0 | 143 | if [ -z "${success}" ]; then |
71d3a659 SG |
144 | echo "ERROR: Unable to fetch GPG key from keyserver." |
145 | exit 1 | |
146 | fi | |
b0f0932a SG |
147 | |
148 | DOWNLOAD_READY_GPG="true" | |
71d3a659 SG |
149 | } |
150 | ||
151 | gpg_validate() { | |
3f7be9d0 WG |
152 | if [ "${DOWNLOAD_VALIDATE}" = "false" ]; then |
153 | if [ "${DOWNLOAD_SHOW_GPG_WARNING}" = "true" ]; then | |
71d3a659 SG |
154 | echo "WARNING: Running without gpg validation!" 1>&2 |
155 | fi | |
156 | DOWNLOAD_SHOW_GPG_WARNING="false" | |
157 | return 0 | |
158 | fi | |
159 | ||
3f7be9d0 | 160 | if ! gpg --verify "$1" >/dev/null 2>&1; then |
71d3a659 SG |
161 | echo "ERROR: Invalid signature for $1" 1>&2 |
162 | exit 1 | |
163 | fi | |
164 | } | |
165 | ||
166 | in_userns() { | |
167 | [ -e /proc/self/uid_map ] || { echo no; return; } | |
3f7be9d0 WG |
168 | while read -r line; do |
169 | fields="$(echo "$line" | awk '{ print $1 " " $2 " " $3 }')" | |
170 | if [ "${fields}" = "0 0 4294967295" ]; then | |
171 | echo no; | |
172 | return; | |
173 | fi | |
174 | if echo "${fields}" | grep -q " 0 1$"; then | |
175 | echo userns-root; | |
176 | return; | |
177 | fi | |
9f15e86a | 178 | done < /proc/self/uid_map |
a1b6244e | 179 | |
f74e080c SG |
180 | [ "$(cat /proc/self/uid_map)" = "$(cat /proc/1/uid_map)" ] && \ |
181 | { echo userns-root; return; } | |
71d3a659 SG |
182 | echo yes |
183 | } | |
184 | ||
185 | relevant_file() { | |
186 | FILE_PATH="${LXC_CACHE_PATH}/$1" | |
187 | if [ -e "${FILE_PATH}-${DOWNLOAD_MODE}" ]; then | |
188 | FILE_PATH="${FILE_PATH}-${DOWNLOAD_MODE}" | |
189 | fi | |
3f7be9d0 | 190 | if [ -e "${FILE_PATH}.${DOWNLOAD_COMPAT_LEVEL}" ]; then |
71d3a659 SG |
191 | FILE_PATH="${FILE_PATH}.${DOWNLOAD_COMPAT_LEVEL}" |
192 | fi | |
193 | ||
3f7be9d0 | 194 | echo "${FILE_PATH}" |
71d3a659 SG |
195 | } |
196 | ||
197 | usage() { | |
198 | cat <<EOF | |
199 | LXC container image downloader | |
200 | ||
7d540a26 MA |
201 | Special arguments: |
202 | [ -h | --help ]: Print this help message and exit. | |
203 | [ -l | --list ]: List all available images and exit. | |
204 | ||
71d3a659 SG |
205 | Required arguments: |
206 | [ -d | --dist <distribution> ]: The name of the distribution | |
207 | [ -r | --release <release> ]: Release name/version | |
208 | [ -a | --arch <architecture> ]: Architecture of the container | |
71d3a659 SG |
209 | |
210 | Optional arguments: | |
211 | [ --variant <variant> ]: Variant of the image (default: "default") | |
212 | [ --server <server> ]: Image server (default: "images.linuxcontainers.org") | |
213 | [ --keyid <keyid> ]: GPG keyid (default: 0x...) | |
d2e5c5d1 | 214 | [ --keyserver <keyserver> ]: GPG keyserver to use. Environment variable: DOWNLOAD_KEYSERVER |
71d3a659 SG |
215 | [ --no-validate ]: Disable GPG validation (not recommended) |
216 | [ --flush-cache ]: Flush the local copy (if present) | |
e145b7bb | 217 | [ --force-cache ]: Force the use of the local copy even if expired |
71d3a659 SG |
218 | |
219 | LXC internal arguments (do not pass manually!): | |
220 | [ --name <name> ]: The container name | |
221 | [ --path <path> ]: The path to the container | |
222 | [ --rootfs <rootfs> ]: The path to the container's rootfs | |
2133f58c SH |
223 | [ --mapped-uid <map> ]: A uid map (user namespaces) |
224 | [ --mapped-gid <map> ]: A gid map (user namespaces) | |
d2e5c5d1 TK |
225 | |
226 | Environment Variables: | |
227 | DOWNLOAD_KEYSERVER : The URL of the key server to use, instead of the default. | |
228 | Can be further overridden by using optional argument --keyserver | |
229 | ||
71d3a659 SG |
230 | EOF |
231 | return 0 | |
232 | } | |
233 | ||
3f7be9d0 | 234 | if ! options=$(getopt -o d:r:a:hl -l dist:,release:,arch:,help,list,variant:,\ |
3cd988cc | 235 | server:,keyid:,keyserver:,no-validate,flush-cache,force-cache,name:,path:,\ |
3f7be9d0 | 236 | rootfs:,mapped-uid:,mapped-gid: -- "$@"); then |
71d3a659 SG |
237 | usage |
238 | exit 1 | |
239 | fi | |
240 | eval set -- "$options" | |
241 | ||
242 | while :; do | |
243 | case "$1" in | |
10a5fab6 SG |
244 | -h|--help) usage && exit 1;; |
245 | -l|--list) DOWNLOAD_LIST_IMAGES="true"; shift 1;; | |
3f7be9d0 WG |
246 | -d|--dist) DOWNLOAD_DIST="$2"; shift 2;; |
247 | -r|--release) DOWNLOAD_RELEASE="$2"; shift 2;; | |
248 | -a|--arch) DOWNLOAD_ARCH="$2"; shift 2;; | |
249 | --variant) DOWNLOAD_VARIANT="$2"; shift 2;; | |
250 | --server) DOWNLOAD_SERVER="$2"; shift 2;; | |
251 | --keyid) DOWNLOAD_KEYID="$2"; shift 2;; | |
252 | --keyserver) DOWNLOAD_KEYSERVER="$2"; shift 2;; | |
71d3a659 SG |
253 | --no-validate) DOWNLOAD_VALIDATE="false"; shift 1;; |
254 | --flush-cache) DOWNLOAD_FLUSH_CACHE="true"; shift 1;; | |
9accc2ef | 255 | --force-cache) DOWNLOAD_FORCE_CACHE="true"; shift 1;; |
3f7be9d0 WG |
256 | --name) LXC_NAME="$2"; shift 2;; |
257 | --path) LXC_PATH="$2"; shift 2;; | |
258 | --rootfs) LXC_ROOTFS="$2"; shift 2;; | |
259 | --mapped-uid) LXC_MAPPED_UID="$2"; shift 2;; | |
260 | --mapped-gid) LXC_MAPPED_GID="$2"; shift 2;; | |
71d3a659 SG |
261 | *) break;; |
262 | esac | |
263 | done | |
264 | ||
265 | # Check for required binaries | |
266 | for bin in tar xz wget; do | |
3f7be9d0 WG |
267 | if ! command -V "${bin}" >/dev/null 2>&1; then |
268 | echo "ERROR: Missing required tool: ${bin}" 1>&2 | |
71d3a659 SG |
269 | exit 1 |
270 | fi | |
271 | done | |
272 | ||
273 | # Check for GPG | |
3f7be9d0 WG |
274 | if [ "${DOWNLOAD_VALIDATE}" = "true" ]; then |
275 | if ! command -V gpg >/dev/null 2>&1; then | |
71d3a659 SG |
276 | echo "ERROR: Missing recommended tool: gpg" 1>&2 |
277 | echo "You can workaround this by using --no-validate." 1>&2 | |
278 | exit 1 | |
279 | fi | |
280 | fi | |
281 | ||
282 | # Check that we have all variables we need | |
3f7be9d0 WG |
283 | if [ -z "${LXC_NAME}" ] || [ -z "${LXC_PATH}" ] || [ -z "${LXC_ROOTFS}" ]; then |
284 | if [ "${DOWNLOAD_LIST_IMAGES}" != "true" ]; then | |
308f4f39 MA |
285 | echo "ERROR: Not running through LXC." 1>&2 |
286 | exit 1 | |
287 | fi | |
71d3a659 SG |
288 | fi |
289 | ||
3f7be9d0 | 290 | USERNS="$(in_userns)" |
f74e080c | 291 | |
3f7be9d0 WG |
292 | if [ "${USERNS}" != "no" ]; then |
293 | if [ "${USERNS}" = "yes" ]; then | |
294 | if [ -z "${LXC_MAPPED_UID}" ] || [ "${LXC_MAPPED_UID}" = "-1" ]; then | |
f74e080c SG |
295 | echo "ERROR: In a user namespace without a map." 1>&2 |
296 | exit 1 | |
297 | fi | |
298 | DOWNLOAD_MODE="user" | |
299 | DOWNLOAD_TARGET="user" | |
300 | else | |
301 | DOWNLOAD_MODE="user" | |
302 | DOWNLOAD_TARGET="system" | |
71d3a659 | 303 | fi |
71d3a659 SG |
304 | fi |
305 | ||
3f7be9d0 WG |
306 | if [ -z "${DOWNLOAD_DIST}" ] || [ -z "${DOWNLOAD_RELEASE}" ] || \ |
307 | [ -z "${DOWNLOAD_ARCH}" ]; then | |
b0f0932a | 308 | DOWNLOAD_INTERACTIVE="true" |
71d3a659 SG |
309 | fi |
310 | ||
311 | # Trap all exit signals | |
312 | trap cleanup EXIT HUP INT TERM | |
843a5874 | 313 | |
3f7be9d0 | 314 | if ! command -V mktemp >/dev/null 2>&1; then |
843a5874 | 315 | DOWNLOAD_TEMP=/tmp/lxc-download.$$ |
3f7be9d0 | 316 | mkdir -p "${DOWNLOAD_TEMP}" |
843a5874 SG |
317 | else |
318 | DOWNLOAD_TEMP=$(mktemp -d) | |
319 | fi | |
71d3a659 | 320 | |
10a5fab6 | 321 | # Simply list images |
3f7be9d0 WG |
322 | if [ "${DOWNLOAD_LIST_IMAGES}" = "true" ] || \ |
323 | [ "${DOWNLOAD_INTERACTIVE}" = "true" ]; then | |
10a5fab6 SG |
324 | # Initialize GPG |
325 | gpg_setup | |
326 | ||
327 | # Grab the index | |
3f7be9d0 | 328 | DOWNLOAD_INDEX_PATH="/meta/1.0/index-${DOWNLOAD_MODE}" |
10a5fab6 SG |
329 | |
330 | echo "Downloading the image index" | |
3f7be9d0 WG |
331 | if ! download_file "${DOWNLOAD_INDEX_PATH}.${DOWNLOAD_COMPAT_LEVEL}" \ |
332 | "${DOWNLOAD_TEMP}/index" noexit || | |
333 | ! download_sig "${DOWNLOAD_INDEX_PATH}.${DOWNLOAD_COMPAT_LEVEL}.asc" \ | |
334 | "${DOWNLOAD_TEMP}/index.asc" noexit; then | |
335 | download_file "${DOWNLOAD_INDEX_PATH}" "${DOWNLOAD_TEMP}/index" normal | |
336 | download_sig "${DOWNLOAD_INDEX_PATH}.asc" \ | |
337 | "${DOWNLOAD_TEMP}/index.asc" normal | |
10a5fab6 SG |
338 | fi |
339 | ||
3f7be9d0 | 340 | gpg_validate "${DOWNLOAD_TEMP}/index.asc" |
10a5fab6 SG |
341 | |
342 | # Parse it | |
343 | echo "" | |
344 | echo "---" | |
96283b54 | 345 | printf "DIST\tRELEASE\tARCH\tVARIANT\tBUILD\n" |
10a5fab6 | 346 | echo "---" |
3f7be9d0 WG |
347 | while IFS=';' read -r f1 f2 f3 f4 f5 f6; do |
348 | ||
349 | [ -n "${DOWNLOAD_DIST}" ] && [ "$f1" != "${DOWNLOAD_DIST}" ] && continue | |
350 | [ -n "${DOWNLOAD_RELEASE}" ] && [ "$f2" != "${DOWNLOAD_RELEASE}" ] && continue | |
351 | [ -n "${DOWNLOAD_ARCH}" ] && [ "$f3" != "${DOWNLOAD_ARCH}" ] && continue | |
352 | [ -n "${DOWNLOAD_VARIANT}" ] && [ "$f4" != "${DOWNLOAD_VARIANT}" ] && continue | |
353 | [ -z "${f5}" ] || [ -z "${f6}" ] && continue | |
354 | ||
355 | printf "%s\t%s\t%s\t%s\t%s\n" "${f1}" "${f2}" "${f3}" "${f4}" "${f5}" | |
356 | unset f1 f2 f3 f4 f5 f6 | |
357 | done < "${DOWNLOAD_TEMP}/index" | |
10a5fab6 SG |
358 | echo "---" |
359 | ||
3f7be9d0 | 360 | if [ "${DOWNLOAD_LIST_IMAGES}" = "true" ]; then |
b0f0932a SG |
361 | exit 1 |
362 | fi | |
363 | ||
364 | # Interactive mode | |
365 | echo "" | |
366 | ||
3f7be9d0 WG |
367 | if [ -z "${DOWNLOAD_DIST}" ]; then |
368 | echo "Distribution: " | |
369 | read -r DOWNLOAD_DIST | |
b0f0932a SG |
370 | fi |
371 | ||
3f7be9d0 WG |
372 | if [ -z "${DOWNLOAD_RELEASE}" ]; then |
373 | echo "Release: " | |
374 | read -r DOWNLOAD_RELEASE | |
b0f0932a SG |
375 | fi |
376 | ||
3f7be9d0 WG |
377 | if [ -z "${DOWNLOAD_ARCH}" ]; then |
378 | echo "Architecture: " | |
379 | read -r DOWNLOAD_ARCH | |
b0f0932a SG |
380 | fi |
381 | ||
382 | echo "" | |
10a5fab6 SG |
383 | fi |
384 | ||
71d3a659 | 385 | # Setup the cache |
3f7be9d0 WG |
386 | if [ "${DOWNLOAD_TARGET}" = "system" ]; then |
387 | LXC_CACHE_BASE="${LOCALSTATEDIR}/cache/lxc/" | |
71d3a659 | 388 | else |
3f7be9d0 | 389 | LXC_CACHE_BASE="${HOME}/.cache/lxc/" |
71d3a659 SG |
390 | fi |
391 | ||
6dc6f80b | 392 | # Allow the setting of the LXC_CACHE_PATH with the usage of environment variables. |
3f7be9d0 WG |
393 | LXC_CACHE_PATH="${LXC_CACHE_PATH:-"${LXC_CACHE_BASE}"}" |
394 | LXC_CACHE_PATH="${LXC_CACHE_PATH}/download/${DOWNLOAD_DIST}" | |
395 | LXC_CACHE_PATH="${LXC_CACHE_PATH}/${DOWNLOAD_RELEASE}/${DOWNLOAD_ARCH}/" | |
396 | LXC_CACHE_PATH="${LXC_CACHE_PATH}/${DOWNLOAD_VARIANT}" | |
b56661fe | 397 | |
3f7be9d0 WG |
398 | if [ -d "${LXC_CACHE_PATH}" ]; then |
399 | if [ "${DOWNLOAD_FLUSH_CACHE}" = "true" ]; then | |
71d3a659 | 400 | echo "Flushing the cache..." |
3f7be9d0 WG |
401 | rm -Rf "${LXC_CACHE_PATH}" |
402 | elif [ "${DOWNLOAD_FORCE_CACHE}" = "true" ]; then | |
9accc2ef | 403 | DOWNLOAD_USE_CACHE="true" |
71d3a659 SG |
404 | else |
405 | DOWNLOAD_USE_CACHE="true" | |
406 | if [ -e "$(relevant_file expiry)" ]; then | |
3f7be9d0 | 407 | if [ "$(cat "$(relevant_file expiry)")" -lt "$(date +%s)" ]; then |
71d3a659 SG |
408 | echo "The cached copy has expired, re-downloading..." |
409 | DOWNLOAD_USE_CACHE="false" | |
71d3a659 SG |
410 | fi |
411 | fi | |
412 | fi | |
413 | fi | |
414 | ||
415 | # Download what's needed | |
3f7be9d0 | 416 | if [ "${DOWNLOAD_USE_CACHE}" = "false" ]; then |
71d3a659 SG |
417 | # Initialize GPG |
418 | gpg_setup | |
419 | ||
420 | # Grab the index | |
3f7be9d0 | 421 | DOWNLOAD_INDEX_PATH="/meta/1.0/index-${DOWNLOAD_MODE}" |
71d3a659 SG |
422 | |
423 | echo "Downloading the image index" | |
3f7be9d0 WG |
424 | if ! download_file "${DOWNLOAD_INDEX_PATH}.${DOWNLOAD_COMPAT_LEVEL}" \ |
425 | "${DOWNLOAD_TEMP}/index" noexit || | |
426 | ! download_sig "${DOWNLOAD_INDEX_PATH}.${DOWNLOAD_COMPAT_LEVEL}.asc" \ | |
427 | "${DOWNLOAD_TEMP}/index.asc" noexit; then | |
428 | download_file "${DOWNLOAD_INDEX_PATH}" "${DOWNLOAD_TEMP}/index" normal | |
429 | download_sig "${DOWNLOAD_INDEX_PATH}.asc" \ | |
430 | "${DOWNLOAD_TEMP}/index.asc" normal | |
71d3a659 SG |
431 | fi |
432 | ||
3f7be9d0 | 433 | gpg_validate "${DOWNLOAD_TEMP}/index.asc" |
71d3a659 SG |
434 | |
435 | # Parse it | |
3f7be9d0 WG |
436 | while IFS=';' read -r f1 f2 f3 f4 f5 f6; do |
437 | ||
438 | if [ "${f1}" != "${DOWNLOAD_DIST}" ] || \ | |
439 | [ "${f2}" != "${DOWNLOAD_RELEASE}" ] || \ | |
440 | [ "${f3}" != "${DOWNLOAD_ARCH}" ] || \ | |
441 | [ "${f4}" != "${DOWNLOAD_VARIANT}" ] || \ | |
442 | [ -z "${f6}" ]; then | |
71d3a659 SG |
443 | continue |
444 | fi | |
445 | ||
3f7be9d0 WG |
446 | DOWNLOAD_BUILD="${f5}" |
447 | DOWNLOAD_URL="${f6}" | |
448 | ||
449 | unset f1 f2 f3 f4 f5 f6 | |
71d3a659 | 450 | break |
3f7be9d0 | 451 | done < "${DOWNLOAD_TEMP}/index" |
71d3a659 | 452 | |
3f7be9d0 | 453 | if [ -z "${DOWNLOAD_URL}" ]; then |
71d3a659 SG |
454 | echo "ERROR: Couldn't find a matching image." 1>&1 |
455 | exit 1 | |
456 | fi | |
457 | ||
3f7be9d0 WG |
458 | if [ -d "${LXC_CACHE_PATH}" ] && [ -f "${LXC_CACHE_PATH}/build_id" ] && \ |
459 | [ "$(cat "${LXC_CACHE_PATH}/build_id")" = "${DOWNLOAD_BUILD}" ]; then | |
9accc2ef SG |
460 | echo "The cache is already up to date." |
461 | echo "Using image from local cache" | |
462 | else | |
463 | # Download the actual files | |
464 | echo "Downloading the rootfs" | |
3f7be9d0 WG |
465 | download_file "${DOWNLOAD_URL}/rootfs.tar.xz" \ |
466 | "${DOWNLOAD_TEMP}/rootfs.tar.xz" normal | |
467 | download_sig "${DOWNLOAD_URL}/rootfs.tar.xz.asc" \ | |
468 | "${DOWNLOAD_TEMP}/rootfs.tar.xz.asc" normal | |
469 | gpg_validate "${DOWNLOAD_TEMP}/rootfs.tar.xz.asc" | |
9accc2ef SG |
470 | |
471 | echo "Downloading the metadata" | |
3f7be9d0 WG |
472 | download_file "${DOWNLOAD_URL}/meta.tar.xz" \ |
473 | "${DOWNLOAD_TEMP}/meta.tar.xz" normal | |
474 | download_sig "$DOWNLOAD_URL/meta.tar.xz.asc" \ | |
475 | "${DOWNLOAD_TEMP}/meta.tar.xz.asc" normal | |
476 | gpg_validate "${DOWNLOAD_TEMP}/meta.tar.xz.asc" | |
477 | ||
478 | if [ -d "${LXC_CACHE_PATH}" ]; then | |
479 | rm -Rf "${LXC_CACHE_PATH}" | |
9accc2ef | 480 | fi |
3f7be9d0 WG |
481 | mkdir -p "${LXC_CACHE_PATH}" |
482 | mv "${DOWNLOAD_TEMP}/rootfs.tar.xz" "${LXC_CACHE_PATH}" | |
483 | if ! tar Jxf "${DOWNLOAD_TEMP}/meta.tar.xz" -C "${LXC_CACHE_PATH}"; then | |
9accc2ef SG |
484 | echo "ERROR: Invalid rootfs tarball." 2>&1 |
485 | exit 1 | |
486 | fi | |
71d3a659 | 487 | |
3f7be9d0 | 488 | echo "${DOWNLOAD_BUILD}" > "${LXC_CACHE_PATH}/build_id" |
9accc2ef | 489 | |
3f7be9d0 WG |
490 | if [ -n "${LXC_MAPPED_UID}" ] && [ "${LXC_MAPPED_UID}" != "-1" ]; then |
491 | # As the script is run in strict mode (set -eu), all commands | |
492 | # exiting with non 0 would make the script stop. | |
493 | # || true or || : (more portable) prevents that. | |
494 | chown -R "${LXC_MAPPED_UID}" "${LXC_CACHE_BASE}" >/dev/null 2>&1 || : | |
9accc2ef | 495 | fi |
3f7be9d0 WG |
496 | if [ -n "${LXC_MAPPED_GID}" ] && [ "${LXC_MAPPED_GID}" != "-1" ]; then |
497 | chgrp -R "${LXC_MAPPED_GID}" "${LXC_CACHE_BASE}" >/dev/null 2>&1 || : | |
2133f58c | 498 | fi |
9accc2ef | 499 | echo "The image cache is now ready" |
71d3a659 | 500 | fi |
71d3a659 SG |
501 | else |
502 | echo "Using image from local cache" | |
503 | fi | |
504 | ||
505 | # Unpack the rootfs | |
506 | echo "Unpacking the rootfs" | |
fecf101c SG |
507 | |
508 | EXCLUDES="" | |
509 | excludelist=$(relevant_file excludes) | |
510 | if [ -f "${excludelist}" ]; then | |
3f7be9d0 WG |
511 | while read -r line; do |
512 | EXCLUDES="${EXCLUDES} --exclude=${line}" | |
513 | done < "${excludelist}" | |
71d3a659 SG |
514 | fi |
515 | ||
3f7be9d0 WG |
516 | # Do not surround ${EXCLUDES} by quotes. This does not work. The solution could |
517 | # use array but this is not POSIX compliant. The only POSIX compliant solution | |
518 | # is to use a function wrapper, but the latter can't be used here as the args | |
519 | # are dynamic. We thus need to ignore the warning brought by shellcheck. | |
520 | # shellcheck disable=SC2086 | |
fecf101c | 521 | tar --anchored ${EXCLUDES} --numeric-owner -xpJf \ |
3f7be9d0 | 522 | "${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 | |
71d3a659 SG |
530 | echo "ERROR: meta tarball is missing the configuration file" 1>&2 |
531 | exit 1 | |
532 | fi | |
533 | ||
534 | ## Extract all the network config entries | |
7fa3f2e9 | 535 | sed -i -e "/lxc.net.0/{w ${LXC_PATH}/config-network" -e "d}" \ |
3f7be9d0 | 536 | "${LXC_PATH}/config" |
71d3a659 SG |
537 | |
538 | ## Extract any other config entry | |
3f7be9d0 | 539 | sed -i -e "/lxc./{w ${LXC_PATH}/config-auto" -e "d}" "${LXC_PATH}/config" |
71d3a659 SG |
540 | |
541 | ## Append the defaults | |
3f7be9d0 WG |
542 | echo "" >> "${LXC_PATH}/config" |
543 | echo "# Distribution configuration" >> "${LXC_PATH}/config" | |
544 | cat "$configfile" >> "${LXC_PATH}/config" | |
71d3a659 SG |
545 | |
546 | ## Add the container-specific config | |
3f7be9d0 WG |
547 | echo "" >> "${LXC_PATH}/config" |
548 | echo "# Container specific configuration" >> "${LXC_PATH}/config" | |
71d3a659 | 549 | if [ -e "${LXC_PATH}/config-auto" ]; then |
3f7be9d0 WG |
550 | cat "${LXC_PATH}/config-auto" >> "${LXC_PATH}/config" |
551 | rm "${LXC_PATH}/config-auto" | |
71d3a659 | 552 | fi |
3f7be9d0 WG |
553 | if [ -e "${fstab}" ]; then |
554 | echo "lxc.mount.fstab = ${LXC_PATH}/fstab" >> "${LXC_PATH}/config" | |
71d3a659 | 555 | fi |
3f7be9d0 | 556 | echo "lxc.uts.name = ${LXC_NAME}" >> "${LXC_PATH}/config" |
71d3a659 SG |
557 | |
558 | ## Re-add the previously removed network config | |
559 | if [ -e "${LXC_PATH}/config-network" ]; then | |
3f7be9d0 WG |
560 | echo "" >> "${LXC_PATH}/config" |
561 | echo "# Network configuration" >> "${LXC_PATH}/config" | |
562 | cat "${LXC_PATH}/config-network" >> "${LXC_PATH}/config" | |
563 | rm "${LXC_PATH}/config-network" | |
71d3a659 SG |
564 | fi |
565 | ||
566 | TEMPLATE_FILES="${LXC_PATH}/config" | |
567 | ||
568 | # Setup the fstab | |
3f7be9d0 WG |
569 | if [ -e "${fstab}" ]; then |
570 | cp "${fstab}" "${LXC_PATH}/fstab" | |
571 | TEMPLATE_FILES="${TEMPLATE_FILES};${LXC_PATH}/fstab" | |
71d3a659 SG |
572 | fi |
573 | ||
574 | # Look for extra templates | |
575 | if [ -e "$(relevant_file templates)" ]; then | |
3f7be9d0 WG |
576 | while read -r line; do |
577 | fullpath="${LXC_ROOTFS}/${line}" | |
578 | [ ! -e "${fullpath}" ] && continue | |
579 | TEMPLATE_FILES="${TEMPLATE_FILES};${fullpath}" | |
580 | done < "$(relevant_file templates)" | |
71d3a659 SG |
581 | fi |
582 | ||
583 | # Replace variables in all templates | |
3f7be9d0 WG |
584 | OLD_IFS=${IFS} |
585 | IFS=";" | |
586 | for file in ${TEMPLATE_FILES}; do | |
587 | [ ! -f "${file}" ] && continue | |
588 | ||
589 | sed -i "s#LXC_NAME#${LXC_NAME}#g" "${file}" | |
590 | sed -i "s#LXC_PATH#${LXC_PATH}#g" "${file}" | |
591 | sed -i "s#LXC_ROOTFS#${LXC_ROOTFS}#g" "${file}" | |
592 | sed -i "s#LXC_TEMPLATE_CONFIG#${LXC_TEMPLATE_CONFIG}#g" "${file}" | |
593 | sed -i "s#LXC_HOOK_DIR#${LXC_HOOK_DIR}#g" "${file}" | |
71d3a659 | 594 | done |
3f7be9d0 | 595 | IFS=${OLD_IFS} |
71d3a659 | 596 | |
491a01cf | 597 | # prevent mingetty from calling vhangup(2) since it fails with userns on CentOS / Oracle |
3f7be9d0 WG |
598 | if [ -f "${LXC_ROOTFS}/etc/init/tty.conf" ]; then |
599 | sed -i 's|mingetty|mingetty --nohangup|' "${LXC_ROOTFS}/etc/init/tty.conf" | |
6e53ca56 SC |
600 | fi |
601 | ||
3f7be9d0 WG |
602 | if [ -n "${LXC_MAPPED_UID}" ] && [ "${LXC_MAPPED_UID}" != "-1" ]; then |
603 | chown "${LXC_MAPPED_UID}" "${LXC_PATH}/config" "${LXC_PATH}/fstab" >/dev/null 2>&1 || : | |
71d3a659 | 604 | fi |
3f7be9d0 WG |
605 | if [ -n "${LXC_MAPPED_GID}" ] && [ "${LXC_MAPPED_GID}" != "-1" ]; then |
606 | chgrp "${LXC_MAPPED_GID}" "${LXC_PATH}/config" "${LXC_PATH}/fstab" >/dev/null 2>&1 || : | |
2133f58c | 607 | fi |
71d3a659 SG |
608 | |
609 | if [ -e "$(relevant_file create-message)" ]; then | |
610 | echo "" | |
611 | echo "---" | |
612 | cat "$(relevant_file create-message)" | |
613 | fi | |
614 | ||
615 | exit 0 |