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add clonehostname hook
This hook script updates the hostname in various files under /etc in the cloned container. In order to do so, the old container name is passed in the LXC_SRC_NAME environment variable. Signed-off-by: Dwight Engen <dwight.engen@oracle.com> Acked-by: Stéphane Graber <stgraber@ubuntu.com> Signed-off-by: Serge Hallyn <serge.hallyn@ubuntu.com>
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@ -255,7 +255,8 @@ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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argument 4. The <filename>LXC_ROOTFS_MOUNT</filename> environment variable gives
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the path under which the container's root filesystem is mounted. The
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configuration file pathname is stored in <filename>LXC_CONFIG_FILE</filename>, the
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container name in <filename>LXC_NAME</filename>, and the path or device on which
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new container name in <filename>LXC_NAME</filename>, the old container name in
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<filename>LXC_SRC_NAME</filename>, and the path or device on which
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the rootfs is located is in <filename>LXC_ROOTFS_PATH</filename>.
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</para>
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</refsect1>
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@ -1,6 +1,7 @@
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hooksdir=@LXCHOOKDIR@
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hooks_SCRIPTS = \
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clonehostname \
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mountcgroups \
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mountecryptfsroot
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29
hooks/clonehostname
Executable file
29
hooks/clonehostname
Executable file
@ -0,0 +1,29 @@
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#!/bin/sh
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#
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# Update the hostname in the cloned container's scripts
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#
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# Copyright © 2013 Oracle.
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#
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# This library is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License version 2, as
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# published by the Free Software Foundation.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License along
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# with this program; if not, write to the Free Software Foundation, Inc.,
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# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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# Note that /etc/hostname is updated by lxc itself
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for file in \
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$LXC_ROOTFS_PATH/etc/sysconfig/network \
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$LXC_ROOTFS_PATH/etc/sysconfig/network-scripts/ifcfg-* ;
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do
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if [ -f $file ]; then
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sed -i "s|$LXC_SRC_NAME|$LXC_NAME|" $file
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fi
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done
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exit 0
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@ -1770,7 +1770,9 @@ static int copy_storage(struct lxc_container *c0, struct lxc_container *c,
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return 0;
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}
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static int clone_update_rootfs(struct lxc_container *c, int flags, char **hookargs)
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static int clone_update_rootfs(struct lxc_container *c0,
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struct lxc_container *c, int flags,
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char **hookargs)
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{
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int ret = -1;
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char path[MAXPATHLEN];
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@ -1800,6 +1802,9 @@ static int clone_update_rootfs(struct lxc_container *c, int flags, char **hookar
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if (!lxc_list_empty(&conf->hooks[LXCHOOK_CLONE])) {
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/* Start of environment variable setup for hooks */
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if (setenv("LXC_SRC_NAME", c0->name, 1)) {
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SYSERROR("failed to set environment variable for source container name");
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}
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if (setenv("LXC_NAME", c->name, 1)) {
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SYSERROR("failed to set environment variable for container name");
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}
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@ -1958,7 +1963,7 @@ struct lxc_container *lxcapi_clone(struct lxc_container *c, const char *newname,
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if (!c2->save_config(c2, NULL))
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goto out;
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if (clone_update_rootfs(c2, flags, hookargs) < 0)
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if (clone_update_rootfs(c, c2, flags, hookargs) < 0)
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goto out;
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// TODO: update c's lxc.snapshot = count
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