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1 | <!-- |
2 | ||
3 | lxc: linux Container library | |
4 | ||
5 | (C) Copyright IBM Corp. 2007, 2008 | |
6 | ||
7 | Authors: | |
9afe19d6 | 8 | Daniel Lezcano <daniel.lezcano at free.fr> |
11cddd70 SH |
9 | Serge Hallyn <serge.hallyn at ubuntu.com> |
10 | ||
11 | This library is free software; you can redistribute it and/or | |
12 | modify it under the terms of the GNU Lesser General Public | |
13 | License as published by the Free Software Foundation; either | |
14 | version 2.1 of the License, or (at your option) any later version. | |
15 | ||
16 | This library is distributed in the hope that it will be useful, | |
17 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
19 | Lesser General Public License for more details. | |
20 | ||
21 | You should have received a copy of the GNU Lesser General Public | |
22 | License along with this library; if not, write to the Free Software | |
250b1eec | 23 | Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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24 | |
25 | --> | |
26 | ||
7f951458 | 27 | <!DOCTYPE refentry PUBLIC @docdtd@ [ |
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28 | |
29 | <!ENTITY commonoptions SYSTEM "@builddir@/common_options.sgml"> | |
30 | <!ENTITY seealso SYSTEM "@builddir@/see_also.sgml"> | |
31 | ]> | |
32 | ||
33 | <refentry> | |
34 | ||
35 | <docinfo><date>@LXC_GENERATE_DATE@</date></docinfo> | |
36 | ||
37 | <refmeta> | |
38 | <refentrytitle>lxc-clone</refentrytitle> | |
39 | <manvolnum>1</manvolnum> | |
40 | </refmeta> | |
41 | ||
42 | <refnamediv> | |
43 | <refname>lxc-clone</refname> | |
44 | ||
45 | <refpurpose> | |
46 | clone a new container from an existing one. | |
47 | </refpurpose> | |
48 | </refnamediv> | |
49 | ||
50 | <refsynopsisdiv> | |
51 | <cmdsynopsis> | |
52 | <command>lxc-clone</command> | |
9be53773 SH |
53 | <arg choice="opt">-s </arg> |
54 | <arg choice="opt">-K </arg> | |
55 | <arg choice="opt">-M </arg> | |
56 | <arg choice="opt">-H </arg> | |
57 | <arg choice="opt">-B <replaceable>backingstore</replaceable></arg> | |
58 | <arg choice="opt">-L <replaceable>fssize</replaceable></arg> | |
59 | <arg choice="opt">-p <replaceable>lxcpath</replaceable></arg> | |
60 | <arg choice="opt">-P <replaceable>newlxcpath</replaceable></arg> | |
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61 | <arg choice="req">-o <replaceable>orig</replaceable></arg> |
62 | <arg choice="req">-n <replaceable>new</replaceable></arg> | |
dc92f6c7 | 63 | <arg choice="opt">-- hook arguments</arg> |
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64 | </cmdsynopsis> |
65 | <cmdsynopsis> | |
66 | <command>lxc-clone</command> | |
11cddd70 | 67 | <arg choice="opt">-s </arg> |
9be53773 SH |
68 | <arg choice="opt">-K </arg> |
69 | <arg choice="opt">-M </arg> | |
70 | <arg choice="opt">-H </arg> | |
71 | <arg choice="opt">-B <replaceable>backingstore</replaceable></arg> | |
11cddd70 | 72 | <arg choice="opt">-L <replaceable>fssize</replaceable></arg> |
9be53773 SH |
73 | <arg choice="opt">-p <replaceable>lxcpath</replaceable></arg> |
74 | <arg choice="opt">-P <replaceable>newlxcpath</replaceable></arg> | |
75 | <arg choice="req">orig</arg> | |
76 | <arg choice="req">new</arg> | |
dc92f6c7 | 77 | <arg choice="opt">-- hook arguments</arg> |
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78 | </cmdsynopsis> |
79 | </refsynopsisdiv> | |
80 | ||
81 | <refsect1> | |
82 | <title>Description</title> | |
83 | ||
84 | <para> | |
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85 | <command>lxc-clone</command> Creates a new container as a clone of an existing |
86 | container. Two types of clones are supported: copy and snapshot. A copy | |
87 | clone copies the root filessytem from the original container to the new. A | |
88 | snapshot filesystem uses the backing store's snapshot functionality to create | |
89 | a very small copy-on-write snapshot of the original container. Snapshot | |
90 | clones require the new container backing store to support snapshotting. Currently | |
91 | this includes only btrfs, lvm, overlayfs and zfs. LVM devices do not support | |
99282c42 | 92 | snapshots of snapshots. |
9be53773 SH |
93 | </para> |
94 | ||
95 | <para> | |
96 | The backing store of the new container will be the same type as the | |
97 | original container, | |
98 | with one exception: overlayfs snapshots can be created of directory backed | |
99 | containers. This can be requested by using the <replaceable>-B overlayfs</replaceable> | |
100 | arguments. | |
101 | </para> | |
102 | ||
103 | <para> | |
104 | The names of the original and new container can be given (in that order) | |
105 | after all options, or can be specified with the | |
106 | <replaceable>-o</replaceable> and <replaceable>-n</replaceable> options, | |
107 | respectively. | |
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108 | </para> |
109 | ||
110 | </refsect1> | |
111 | ||
112 | <refsect1> | |
113 | ||
114 | <title>Options</title> | |
115 | ||
116 | <variablelist> | |
117 | ||
118 | <varlistentry> | |
119 | <term> | |
9be53773 | 120 | <option>-s, --snapshot</option> |
11cddd70 SH |
121 | </term> |
122 | <listitem> | |
123 | <para> | |
9be53773 | 124 | The new container's rootfs should be a LVM or btrfs snapshot of the original. |
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125 | </para> |
126 | </listitem> | |
127 | </varlistentry> | |
128 | ||
129 | <varlistentry> | |
130 | <term> | |
9be53773 | 131 | <option>-K, --keepname</option> |
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132 | </term> |
133 | <listitem> | |
134 | <para> | |
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135 | Do not change the hostname of the container (in the root |
136 | filesystem). | |
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137 | </para> |
138 | </listitem> | |
139 | </varlistentry> | |
140 | ||
141 | <varlistentry> | |
142 | <term> | |
9be53773 | 143 | <option>-M, --keepmac</option> |
11cddd70 SH |
144 | </term> |
145 | <listitem> | |
146 | <para> | |
99282c42 | 147 | Use the same MAC address as the original container, rather than |
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148 | generating a new random one. |
149 | </para> | |
150 | </listitem> | |
151 | </varlistentry> | |
152 | ||
153 | <varlistentry> | |
154 | <term> | |
155 | <option>-H, --copyhooks</option> | |
156 | </term> | |
157 | <listitem> | |
158 | <para> | |
159 | Copy all mount hooks into the new container's directory, and | |
160 | update any lxcpaths and container names as needed. | |
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161 | </para> |
162 | </listitem> | |
163 | </varlistentry> | |
164 | ||
165 | <varlistentry> | |
166 | <term> | |
167 | <option>-L, --fssize <replaceable>fssize</replaceable></option> | |
168 | </term> | |
169 | <listitem> | |
170 | <para> | |
9be53773 | 171 | In the case of a block device backed container, a size for the new |
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172 | block device. By default, the new device will be made the |
173 | same size as the original. | |
174 | </para> | |
175 | </listitem> | |
176 | </varlistentry> | |
177 | ||
178 | <varlistentry> | |
179 | <term> | |
9be53773 | 180 | <option>-p, --lxcpath <replaceable>fssize</replaceable></option> |
11cddd70 SH |
181 | </term> |
182 | <listitem> | |
183 | <para> | |
9be53773 SH |
184 | The lxcpath of the original container. By default, the system |
185 | wide configured lxcpath will be used. | |
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186 | </para> |
187 | </listitem> | |
188 | </varlistentry> | |
189 | ||
190 | <varlistentry> | |
191 | <term> | |
9be53773 | 192 | <option>-P, --newpath <replaceable>fssize</replaceable></option> |
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193 | </term> |
194 | <listitem> | |
195 | <para> | |
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196 | The lxcpath for the new container. By default the same lxcpath |
197 | as the original will be used. Note that with btrfs snapshots, | |
198 | changing lxcpaths may not be possible, as subvolume snapshots | |
199 | must be in the same btrfs filesystem. | |
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200 | </para> |
201 | </listitem> | |
202 | </varlistentry> | |
203 | ||
204 | <varlistentry> | |
205 | <term> | |
9be53773 | 206 | <option>-B, --backingstore <replaceable>fssize</replaceable></option> |
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207 | </term> |
208 | <listitem> | |
209 | <para> | |
9be53773 SH |
210 | Select a different backing store for the new container. By |
211 | default the same as the original container's is used. Note that | |
212 | currently changing the backingstore is only supported for | |
213 | overlayfs snapshots of directory backed containers. Valid | |
eddaaafd | 214 | backing stores include dir (directory), btrfs, lvm, zfs, loop |
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215 | and overlayfs. |
216 | </para> | |
217 | </listitem> | |
218 | </varlistentry> | |
219 | ||
220 | <varlistentry> | |
221 | <term> | |
222 | <option>-o, --orig <replaceable>orig</replaceable></option> | |
223 | </term> | |
224 | <listitem> | |
225 | <para> | |
226 | The name of the original container to clone. | |
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227 | </para> |
228 | </listitem> | |
229 | </varlistentry> | |
230 | ||
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231 | <varlistentry> |
232 | <term> | |
233 | <option>-n, --new <replaceable>new</replaceable></option> | |
234 | </term> | |
235 | <listitem> | |
236 | <para> | |
237 | The name of the new container to create. | |
238 | </para> | |
239 | </listitem> | |
240 | </varlistentry> | |
241 | ||
242 | ||
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243 | </variablelist> |
244 | ||
245 | </refsect1> | |
246 | ||
dc92f6c7 SH |
247 | <refsect1> |
248 | <title>Clone hook</title> | |
249 | <para> | |
250 | If the container being cloned has one or more <filename>lxc.hook.clone</filename> | |
251 | specified, then the specified hooks will be called for the new container. The | |
252 | first 3 arguments passed to the clone hook will be the container name, a section | |
253 | ('lxc'), and the hook type ('clone'). Extra arguments passed | |
254 | <command>lxc-clone</command> will be passed to the hook program starting at | |
255 | argument 4. The <filename>LXC_ROOTFS_MOUNT</filename> environment variable gives | |
256 | the path under which the container's root filesystem is mounted. The | |
257 | configuration file pathname is stored in <filename>LXC_CONFIG_FILE</filename>, the | |
1143ed39 DE |
258 | new container name in <filename>LXC_NAME</filename>, the old container name in |
259 | <filename>LXC_SRC_NAME</filename>, and the path or device on which | |
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260 | the rootfs is located is in <filename>LXC_ROOTFS_PATH</filename>. |
261 | </para> | |
262 | </refsect1> | |
263 | ||
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264 | &seealso; |
265 | ||
266 | <refsect1> | |
267 | <title>Author</title> | |
268 | <para>Serge Hallyn <email>serge.hallyn@ubuntu.com</email></para> | |
269 | </refsect1> | |
270 | ||
271 | </refentry> | |
272 | ||
273 | <!-- Keep this comment at the end of the file | |
274 | Local variables: | |
275 | mode: sgml | |
276 | sgml-omittag:t | |
277 | sgml-shorttag:t | |
278 | sgml-minimize-attributes:nil | |
279 | sgml-always-quote-attributes:t | |
280 | sgml-indent-step:2 | |
281 | sgml-indent-data:t | |
282 | sgml-parent-document:nil | |
283 | sgml-default-dtd-file:nil | |
284 | sgml-exposed-tags:nil | |
285 | sgml-local-catalogs:nil | |
286 | sgml-local-ecat-files:nil | |
287 | End: | |
288 | --> |