<listitem><para>Automatically search
for an init binary and invoke it
instead of a shell or a user supplied
- program. If this option is used, arguments
- specified on the command line are used
- as arguments for the init binary.
+ program. If this option is used,
+ arguments specified on the command
+ line are used as arguments for the
+ init binary. This option may not be
+ combined with
+ <option>--share-system</option>.
</para></listitem>
</varlistentry>
output by the tool itself. When this
switch is used, then the only output
by nspawn will be the console output
- of the container OS
- itself.</para></listitem>
+ of the container OS itself.</para></listitem>
</varlistentry>
<varlistentry>
interact more easily with processes
outside of the container. Note that
using this option makes it impossible
- to start up a full Operating System in the
- container, as an init system cannot
- operate in this mode. It is only
- useful to run specific programs or
- applications this way, without
- involving an init
- system in the container.</para></listitem>
+ to start up a full Operating System in
+ the container, as an init system
+ cannot operate in this mode. It is
+ only useful to run specific programs
+ or applications this way, without
+ involving an init system in the
+ container. This option implies
+ <option>--register=no</option>. This
+ option may not be combined with
+ <option>--boot</option>.</para></listitem>
</varlistentry>
+ <varlistentry>
+ <term><option>--register=</option></term>
+
+ <listitem><para>Controls whether the
+ container is registered with
+ <citerefentry><refentrytitle>systemd-machined</refentrytitle><manvolnum>8</manvolnum></citerefentry>. Takes
+ a boolean argument, defaults to
+ <literal>yes</literal>. This option
+ should be enabled when the container
+ runs a full Operating System (more
+ specifically: an init system), and is
+ useful to ensure the container is
+ accesible via
+ <citerefentry><refentrytitle>machinectl</refentrytitle><manvolnum>1</manvolnum></citerefentry>
+ and shown by tools such as
+ <citerefentry><refentrytitle>ps</refentrytitle><manvolnum>1</manvolnum></citerefentry>. If
+ the container does not run an init
+ system it is recommended to set this
+ option to <literal>no</literal>. Note
+ that <option>--share-system</option>
+ implies
+ <option>--register=no</option>.
+ </para></listitem>
+ </varlistentry>
</variablelist>
</refsect1>
static char **arg_setenv = NULL;
static bool arg_quiet = false;
static bool arg_share_system = false;
+static bool arg_register = true;
static int help(void) {
" the container\n"
" --bind-ro=PATH[:PATH] Similar, but creates a read-only bind mount\n"
" --setenv=NAME=VALUE Pass an environment variable to PID 1\n"
+ " --register=BOOLEAN Register container as machine\n"
" -q --quiet Do not show status information\n",
program_invocation_short_name);
ARG_BIND,
ARG_BIND_RO,
ARG_SETENV,
- ARG_SHARE_SYSTEM
+ ARG_SHARE_SYSTEM,
+ ARG_REGISTER
};
static const struct option options[] = {
{ "selinux-apifs-context", required_argument, NULL, 'L' },
{ "quiet", no_argument, NULL, 'q' },
{ "share-system", no_argument, NULL, ARG_SHARE_SYSTEM },
+ { "register", required_argument, NULL, ARG_REGISTER },
{}
};
break;
case 'M':
- if (!hostname_is_valid(optarg)) {
- log_error("Invalid machine name: %s", optarg);
- return -EINVAL;
- }
+ if (isempty(optarg)) {
+ free(arg_machine);
+ arg_machine = NULL;
+ } else {
- free(arg_machine);
- arg_machine = strdup(optarg);
- if (!arg_machine)
- return log_oom();
+ if (!hostname_is_valid(optarg)) {
+ log_error("Invalid machine name: %s", optarg);
+ return -EINVAL;
+ }
- break;
+ free(arg_machine);
+ arg_machine = strdup(optarg);
+ if (!arg_machine)
+ return log_oom();
+
+ break;
+ }
case 'Z':
arg_selinux_context = optarg;
arg_share_system = true;
break;
+ case ARG_REGISTER:
+ r = parse_boolean(optarg);
+ if (r < 0) {
+ log_error("Failed to parse --register= argument: %s", optarg);
+ return r;
+ }
+
+ arg_register = r;
+ break;
+
case '?':
return -EINVAL;
}
}
+ if (arg_share_system)
+ arg_register = false;
+
+ if (arg_boot && arg_share_system) {
+ log_error("--boot and --share-system may not be combined.");
+ return -EINVAL;
+ }
+
return 1;
}
assert(dest);
+ if (arg_share_system)
+ return 0;
+
/* Generate a new randomized boot ID, so that each boot-up of
* the container gets a new one */
static int setup_hostname(void) {
+ if (arg_share_system)
+ return 0;
+
if (sethostname(arg_machine, strlen(arg_machine)) < 0)
return -errno;
_cleanup_bus_unref_ sd_bus *bus = NULL;
int r;
+ if (!arg_register)
+ return 0;
+
r = sd_bus_default_system(&bus);
if (r < 0) {
log_error("Failed to open system bus: %s", strerror(-r));
const char *path;
int r;
+ if (!arg_register)
+ return 0;
+
r = sd_bus_default_system(&bus);
if (r < 0) {
log_error("Failed to open system bus: %s", strerror(-r));
_cleanup_close_pipe_ int kmsg_socket_pair[2] = { -1, -1 };
_cleanup_fdset_free_ FDSet *fds = NULL;
_cleanup_free_ char *kdbus_domain = NULL;
- const char *ns;
log_parse_environment();
log_open();
goto finish;
}
- ns = strappenda("machine-", arg_machine);
- kdbus_fd = bus_kernel_create_domain(ns, &kdbus_domain);
- if (r < 0)
- log_debug("Failed to create kdbus domain: %s", strerror(-r));
- else
- log_debug("Successfully created kdbus domain as %s", kdbus_domain);
+
+ if (access("/dev/kdbus/control", F_OK) >= 0) {
+
+ if (arg_share_system) {
+ kdbus_domain = strdup("/dev/kdbus");
+ if (!kdbus_domain) {
+ log_oom();
+ goto finish;
+ }
+ } else {
+ const char *ns;
+
+ ns = strappenda("machine-", arg_machine);
+ kdbus_fd = bus_kernel_create_domain(ns, &kdbus_domain);
+ if (r < 0)
+ log_debug("Failed to create kdbus domain: %s", strerror(-r));
+ else
+ log_debug("Successfully created kdbus domain as %s", kdbus_domain);
+ }
+ }
if (socketpair(AF_UNIX, SOCK_DGRAM|SOCK_NONBLOCK|SOCK_CLOEXEC, 0, kmsg_socket_pair) < 0) {
log_error("Failed to create kmsg socket pair: %m");
umask(0022);
- loopback_setup();
+ if (arg_private_network)
+ loopback_setup();
if (drop_capabilities() < 0) {
log_error("drop_capabilities() failed: %m");
} else if (status.si_code == CLD_KILLED ||
status.si_code == CLD_DUMPED) {
- log_error("Container %s terminated by signal %s.", arg_machine, signal_to_string(status.si_status));
+ log_error("Container %s terminated by signal %s.", arg_machine, signal_to_string(status.si_status));
r = EXIT_FAILURE;
break;
} else {