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NAME | SYNOPSIS | DESCRIPTION | OPTIONS | COPY HOOK | COMMON OPTIONS | SEE ALSO | AUTHOR | COLOPHON |
LXC-COPY(1) LXC-COPY(1)
lxc-copy - copy an existing container.
lxc-copy -n, --name name [ -P, --lxcpath path ] -N, --newname
newname [ -p, --newpath newpath ] [ -B, --backingstorage
backingstorage ] [ -s, --snapshot ] [ -K, --keepname ] [ -D,
--keepdata ] [ -M, --keepmac ] [ -L, --fssize size [unit] ] [ --
hook arguments ]
lxc-copy -n, --name name [ -P, --lxcpath path ] [ -N, --newname
newname ] [ -p, --newpath newpath ] -e, --ephemeral [ -B,
--backingstorage backingstorage ] [ -s, --snapshot ] [ -K,
--keepname ] [ -D, --keepdata ] [ -M, --keepmac ] [ -L, --fssize
size [unit] ] [ -- hook arguments ]
lxc-copy -n, --name name [ -P, --lxcpath path ] [ -N, --newname
newname ] [ -p, --newpath newpath ] -e, --ephemeral [ -B,
--backingstorage backingstorage ] [ -s, --snapshot ] [ -t, --tmpfs
] [ -K, --keepname ] [ -M, --keepmac ] [ -- hook arguments ]
lxc-copy -n, --name name [ -P, --lxcpath path ] -N, --newname
newname [ -p, --newpath newpath ] -R, --rename
lxc-copy creates and optionally starts (ephemeral or non-ephemeral)
copies of existing containers. It replaces lxc-clone and lxc-start-
ephemeral.
lxc-copy creates copies of existing containers. Copies can be
complete clones of the original container. In this case the whole
root filesystem of the container is simply copied to the new
container. Or they can be snapshots, i.e. small copy-on-write copies
of the original container. In this case the specified backing storage
for the copy must support snapshots. This currently includes aufs,
btrfs, lvm (lvm devices do not support snapshots of snapshots.),
overlay, and zfs.
The copy's backing storage will be of the same type as the original
container. aufs or overlayfs snapshots of directory backed containers
are exempted from this rule.
When the -e flag is specified an ephemeral snapshot of the original
container is created and started. Ephemeral containers will have
lxc.ephemeral = 1 set in their config file and will be destroyed on
shutdown. When -e is used in combination with -D a non-ephemeral
snapshot of the original container is created and started. Ephemeral
containers can also be placed on a tmpfs with -t flag. NOTE: If an
ephemeral container that is placed on a tmpfs is rebooted all changes
made to it will currently be lost!
When -e is specified and no newname is given via -N a random name for
the snapshot will be chosen.
Containers created and started with -e can have custom mounts. These
are specified with the -m flag. Currently three types of mounts are
supported: aufs, bind, and overlay. Mount types are specified as
suboptions to the -m flag and can be specified multiple times
separated by commas. aufs and overlay mounts are currently specified
in the format -m overlay=/src:/dest. When no destination dest is
specified dest will be identical to src. Read-only bind mounts are
specified -m bind=/src:/dest:ro and read-write bind mounts -m
bind=/src:/dest:rw. Read-write bind mounts are the default and rw can
be missing when a read-write mount is wanted. When dest is missing
dest will be identical to src. An example for multiple mounts would
be -m bind=/src1:/dest1:ro,bind=/src2:ro,overlay=/src3:/dest3.
The mounts, their options, and formats supported via the -m flag are
subject to change.
-N,--newname newname
The name for the copy.
-p,--newpath newpath
The path for the copy.
-R,--rename
Rename the original container.
-s,--snapshot
Create a snapshot of the original container. The backing
storage for the copy must support snapshots. This currently
includes aufs, btrfs, lvm, overlay, and zfs.
-F,--foreground
Run the snapshot in the foreground. The snapshots console will
be attached to the current tty. (This option can only be
specified in conjunction with -e.)
-d, --daemon
Run the snapshot as a daemon (This is the default mode for
ephemeral containers.). As the container has no more tty, if
an error occurs nothing will be displayed, the log file can be
used to check the error. (This option can only be specified in
conjunction with -e.)
-m, --mount mounttype
Specify a mount for a snapshot The opts argument for the mount
type can by of type {aufs, bind, overlay}. For example -m
bind=/src:/dest:ro,overlay=/src:/dest (This option can
currently only be specified in conjunction with -e.).
-t, --tmpfs
When this option is specified the ephemeral container will be
placed on a tmpfs. NOTE: Rebooting an ephemeral container that
is located on a tmpfs will currently cause all changes made to
it to be lost. This flag will only work for ephemeral
containers created with the -e flag. The original container,
from which the ephemeral snapshot is created, must be stored
as a simple directory.
-B, --backingstorage backingstorage
Specify the backing storage type to be used for the copy where
'backingstorage' is of type 'aufs', 'btrfs', 'dir', 'lvm',
'loop', 'overlay', or 'zfs'.
-L, --fssize size [unit]
Specify the size for an 'lvm' filesystem.
-K, --keepname
When this option is specified the hostname of the original
container will be kept for the copy.
-D, --keepdata
When this option is specified with -e a non-ephemeral
container is created and started.
-M, --keepmac
When this option is specified the MAC address of the original
container will be kept for the copy.
If the container being copied has one or more lxc.hook.clone
specified, then the specified hooks will be called for the new
container. The first 3 arguments passed to the clone hook will be the
container name, a section ('lxc'), and the hook type ('clone'). Extra
arguments passed to lxc-copy will be passed to the hook program
starting at argument 4. The LXC_ROOTFS_MOUNT environment variable
gives the path under which the container's root filesystem is
mounted. The configuration file pathname is stored in
LXC_CONFIG_FILE, the new container name in LXC_NAME, the old
container name in LXC_SRC_NAME, and the path or device on which the
rootfs is located is in LXC_ROOTFS_PATH.
These options are common to most of lxc commands.
-?, -h, --help
Print a longer usage message than normal.
--usage
Give the usage message
-q, --quiet
mute on
-P, --lxcpath=PATH
Use an alternate container path. The default is
/usr/local/var/lib/lxc.
-o, --logfile=FILE
Output to an alternate log FILE. The default is no log.
-l, --logpriority=LEVEL
Set log priority to LEVEL. The default log priority is ERROR.
Possible values are : FATAL, CRIT, WARN, ERROR, NOTICE, INFO,
DEBUG.
Note that this option is setting the priority of the events
log in the alternate log file. It do not have effect on the
ERROR events log on stderr.
-n, --name=NAME
Use container identifier NAME. The container identifier
format is an alphanumeric string.
--rcfile=FILE
Specify the configuration file to configure the virtualization
and isolation functionalities for the container.
This configuration file if present will be used even if there
is already a configuration file present in the previously
created container (via lxc-create).
--version
Show the version number.
lxc(7), lxc-create(1), lxc-copy(1), lxc-destroy(1), lxc-start(1),
lxc-stop(1), lxc-execute(1), lxc-console(1), lxc-monitor(1),
lxc-wait(1), lxc-cgroup(1), lxc-ls(1), lxc-info(1), lxc-freeze(1),
lxc-unfreeze(1), lxc-attach(1), lxc.conf(5)
Christian Brauner <christian.brauner@mailbox.org>
This page is part of the lxc (Linux containers) project. Information
about the project can be found at ⟨http://linuxcontainers.org/⟩. If
you have a bug report for this manual page, send it to
lxc-devel@lists.linuxcontainers.org. This page was obtained from the
project's upstream Git repository ⟨git://github.com/lxc/lxc⟩ on
2017-07-05. If you discover any rendering problems in this HTML ver‐
sion of the page, or you believe there is a better or more up-to-date
source for the page, or you have corrections or improvements to the
information in this COLOPHON (which is not part of the original man‐
ual page), send a mail to man-pages@man7.org
2017-07-05 LXC-COPY(1)
Pages that refer to this page: lxc-attach(1), lxc-autostart(1), lxc-cgroup(1), lxc-checkconfig(1), lxc-checkpoint(1), lxc-config(1), lxc-console(1), lxc-copy(1), lxc-create(1), lxc-destroy(1), lxc-device(1), lxc-execute(1), lxc-freeze(1), lxc-info(1), lxc-ls(1), lxc-monitor(1), lxc-snapshot(1), lxc-start(1), lxc-stop(1), lxc-top(1), lxc-unfreeze(1), lxc-unshare(1), lxc-usernsexec(1), lxc-wait(1), lxc.container.conf(5), lxc.system.conf(5), lxc(7)