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nspawn: add --uuid= switch to allow setting the machine id for the container

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This commit is contained in:
Lennart Poettering 2012-04-22 14:48:21 +02:00
parent 5cd6eef69b
commit 144f0fc0c8
3 changed files with 32 additions and 9 deletions
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6
TODO
View File

@ -43,8 +43,6 @@ Features:
* cg_shorten_controllers() misuses alloca()
* suspend/hibernate/hybrid support, auto-suspend logic with idle hint
* udev systemd unify:
- strpcpy(), strpcpyl(), strscpy(), strscpyl()
- utf8 validator code
@ -80,8 +78,6 @@ Features:
* add man page documenting all kernel cmdline options, including stuff like fsck.mode=
* show getty in container mode, not sulogin
* support container_ttys=
* journald: make configurable "store-on-var", "store-on-run", "dont-store", "auto"
@ -109,7 +105,7 @@ Features:
* add command to systemctl to plot dependency graph as tree (see rhbz 795365)
* make logind reserve tty10 or so for text logins, so that gdm never picks it up
* make logind reserve tty9 or so for text logins, so that gdm never picks it up
* add option to sockets to avoid activation. Instead just drop packets/connections, see http://cyberelk.net/tim/2012/02/15/portreserve-systemd-solution/

11
man/systemd-nspawn.xml
View File

@ -164,6 +164,17 @@
</para></listitem>
</varlistentry>
<varlistentry>
<term><option>--uuid=</option></term>
<listitem><para>Set the specified uuid
for the container. The init system
will initialize
<filename>/etc/machine-id</filename>
from this if this file is not set yet.
</para></listitem>
</varlistentry>
<varlistentry>
<term><option>--controllers=</option></term>
<term><option>-C</option></term>

24
src/nspawn/nspawn.c
View File

@ -55,6 +55,7 @@
static char *arg_directory = NULL;
static char *arg_user = NULL;
static char **arg_controllers = NULL;
static char *arg_uuid = NULL;
static bool arg_private_network = false;
static bool arg_boot = false;
@ -67,6 +68,7 @@ static int help(void) {
" -b --boot Boot up full system (i.e. invoke init)\n"
" -u --user=USER Run the command under specified user or uid\n"
" -C --controllers=LIST Put the container in specified comma-separated cgroup hierarchies\n"
" --uuid=UUID Set a specific machine UUID for the container\n"
" --private-network Disable network in container\n",
program_invocation_short_name);
@ -76,7 +78,8 @@ static int help(void) {
static int parse_argv(int argc, char *argv[]) {
enum {
ARG_PRIVATE_NETWORK = 0x100
ARG_PRIVATE_NETWORK = 0x100,
ARG_UUID
};
static const struct option options[] = {
@ -86,6 +89,7 @@ static int parse_argv(int argc, char *argv[]) {
{ "controllers", required_argument, NULL, 'C' },
{ "private-network", no_argument, NULL, ARG_PRIVATE_NETWORK },
{ "boot", no_argument, NULL, 'b' },
{ "uuid", required_argument, NULL, ARG_UUID },
{ NULL, 0, NULL, 0 }
};
@ -140,6 +144,10 @@ static int parse_argv(int argc, char *argv[]) {
arg_boot = true;
break;
case ARG_UUID:
arg_uuid = optarg;
break;
case '?':
return -EINVAL;
@ -912,6 +920,7 @@ int main(int argc, char *argv[]) {
NULL, /* HOME */
NULL, /* USER */
NULL, /* LOGNAME */
NULL, /* container_uuid */
NULL
};
@ -1022,13 +1031,20 @@ int main(int argc, char *argv[]) {
}
}
if ((asprintf((char**)(envp + 3), "HOME=%s", home? home: "/root") < 0) ||
(asprintf((char**)(envp + 4), "USER=%s", arg_user? arg_user : "root") < 0) ||
(asprintf((char**)(envp + 5), "LOGNAME=%s", arg_user? arg_user : "root") < 0)) {
if ((asprintf((char**)(envp + 3), "HOME=%s", home ? home: "/root") < 0) ||
(asprintf((char**)(envp + 4), "USER=%s", arg_user ? arg_user : "root") < 0) ||
(asprintf((char**)(envp + 5), "LOGNAME=%s", arg_user ? arg_user : "root") < 0)) {
log_error("Out of memory");
goto child_fail;
}
if (arg_uuid) {
if (asprintf((char**)(envp + 6), "container_uuid=%s", arg_uuid) < 0) {
log_error("Out of memory");
goto child_fail;
}
}
setup_hostname();
if (arg_boot) {