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.en...@oracle.com>
---
doc/lxc-clone.sgml.in | 3 ++-
hooks/Makefile.am | 1 +
hooks/clonehostname | 29 +++++++++++++++++++++++++++++
src/lxc/lxccontainer.c | 9 +++++++--
4 files changed, 39 insertions(+), 3 deletions(-)
create mode 100755 hooks/clonehostname
diff --git a/doc/lxc-clone.sgml.in b/doc/lxc-clone.sgml.in
index 6885ff7..74982a1 100644
--- a/doc/lxc-clone.sgml.in
+++ b/doc/lxc-clone.sgml.in
@@ -255,7 +255,8 @@ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA
argument 4. The <filename>LXC_ROOTFS_MOUNT</filename> environment
variable gives
the path under which the container's root filesystem is mounted. The
configuration file pathname is stored in
<filename>LXC_CONFIG_FILE</filename>, the
- container name in <filename>LXC_NAME</filename>, and the path or device
on which
+ new container name in <filename>LXC_NAME</filename>, the old container
name in
+ <filename>LXC_SRC_NAME</filename>, and the path or device on which
the rootfs is located is in <filename>LXC_ROOTFS_PATH</filename>.
</para>
</refsect1>
diff --git a/hooks/Makefile.am b/hooks/Makefile.am
index 196e632..3e32ce0 100644
--- a/hooks/Makefile.am
+++ b/hooks/Makefile.am
@@ -1,6 +1,7 @@
hooksdir=@LXCHOOKDIR@
hooks_SCRIPTS = \
+ clonehostname \
mountcgroups \
mountecryptfsroot
diff --git a/hooks/clonehostname b/hooks/clonehostname
new file mode 100755
index 0000000..79d14a5
--- /dev/null
+++ b/hooks/clonehostname
@@ -0,0 +1,29 @@
+#!/bin/bash
+#
+# Update the hostname in the cloned container's scripts
+#
+# Copyright © 2013 Oracle.
+#
+# This library is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License version 2, as
+# published by the Free Software Foundation.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License along
+# with this program; if not, write to the Free Software Foundation, Inc.,
+# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+
+# Note that /etc/hostname is updated by lxc itself
+for file in \
+ $LXC_ROOTFS_PATH/etc/sysconfig/network \
+ $LXC_ROOTFS_PATH/etc/sysconfig/network-scripts/ifcfg-* ;
+do
+ if [ -f $file ]; then
+ sed -i "s|$LXC_SRC_NAME|$LXC_NAME|" $file
+ fi
+done
+exit 0
diff --git a/src/lxc/lxccontainer.c b/src/lxc/lxccontainer.c
index 4e71fb1..43acf47 100644
--- a/src/lxc/lxccontainer.c
+++ b/src/lxc/lxccontainer.c
@@ -1767,7 +1767,9 @@ static int copy_storage(struct lxc_container *c0, struct
lxc_container *c,
return 0;
}
-static int clone_update_rootfs(struct lxc_container *c, int flags, char
**hookargs)
+static int clone_update_rootfs(struct lxc_container *c0,
+ struct lxc_container *c, int flags,
+ char **hookargs)
{
int ret = -1;
char path[MAXPATHLEN];
@@ -1797,6 +1799,9 @@ static int clone_update_rootfs(struct lxc_container *c,
int flags, char **hookar
if (!lxc_list_empty(&conf->hooks[LXCHOOK_CLONE])) {
/* Start of environment variable setup for hooks */
+ if (setenv("LXC_SRC_NAME", c0->name, 1)) {
+ SYSERROR("failed to set environment variable for
container name");
+ }
if (setenv("LXC_NAME", c->name, 1)) {
SYSERROR("failed to set environment variable for
container name");
}
@@ -1955,7 +1960,7 @@ struct lxc_container *lxcapi_clone(struct lxc_container
*c, const char *newname,
if (!c2->save_config(c2, NULL))
goto out;
- if (clone_update_rootfs(c2, flags, hookargs) < 0)
+ if (clone_update_rootfs(c, c2, flags, hookargs) < 0)
goto out;
// TODO: update c's lxc.snapshot = count
--
1.8.1.4
------------------------------------------------------------------------------
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