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https://github.com/systemd/systemd
synced 2024-10-04 15:21:01 +00:00
run: add support for executing commands remotely via SSH or in a container
Also, unify the transport logic a bit, since we reuse the same scheme in many of our client tools.
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5220a6f3a1
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d21ed1ead1
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@ -112,6 +112,27 @@ along with systemd; If not, see <http://www.gnu.org/licenses/>.
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><option>-H</option></term>
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<term><option>--host=</option></term>
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<listitem><para>Execute operation
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remotely. Specify a hostname, or
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username and hostname separated by <literal>@</literal>,
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to connect to. This will use SSH to
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talk to the remote machine manager
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instance.</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><option>-M</option></term>
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<term><option>--machine=</option></term>
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<listitem><para>Execute operation on a
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local container. Specify a container
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name to connect to.</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><option>--scope</option></term>
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@ -212,7 +233,8 @@ Sep 08 07:37:21 bupkis env[19948]: BOOT_IMAGE=/vmlinuz-3.11.0-0.rc5.git6.2.fc20.
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<citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>systemd.service</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>systemd.scope</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>systemd.slice</refentrytitle><manvolnum>5</manvolnum></citerefentry>.
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<citerefentry><refentrytitle>systemd.slice</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>machinectl</refentrytitle><manvolnum>1</manvolnum></citerefentry>
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</para>
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</refsect1>
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@ -44,6 +44,8 @@ int bus_container_connect(sd_bus *b) {
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return -ENOMEM;
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r = parse_env_file(p, NEWLINE, "LEADER", &s, "CLASS", &class, NULL);
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if (r == -ENOENT)
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return -EHOSTDOWN;
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if (r < 0)
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return r;
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if (!s)
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@ -594,3 +594,38 @@ int bus_generic_print_property(const char *name, sd_bus_message *property, bool
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return 0;
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}
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int bus_open_transport(BusTransport transport, const char *host, bool user, sd_bus **bus) {
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int r;
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assert(transport >= 0);
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assert(transport < _BUS_TRANSPORT_MAX);
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assert(bus);
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assert_return((transport == BUS_TRANSPORT_LOCAL) == !host, -EINVAL);
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assert_return(transport == BUS_TRANSPORT_LOCAL || !user, -ENOTSUP);
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switch (transport) {
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case BUS_TRANSPORT_LOCAL:
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if (user)
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r = sd_bus_open_user(bus);
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else
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r = sd_bus_open_system(bus);
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break;
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case BUS_TRANSPORT_REMOTE:
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r = sd_bus_open_system_remote(host, bus);
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break;
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case BUS_TRANSPORT_CONTAINER:
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r = sd_bus_open_system_container(host, bus);
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break;
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default:
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assert_not_reached("Hmm, unknown transport type.");
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}
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return r;
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}
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@ -27,6 +27,14 @@
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#include "time-util.h"
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#include "util.h"
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typedef enum BusTransport {
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BUS_TRANSPORT_LOCAL,
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BUS_TRANSPORT_REMOTE,
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BUS_TRANSPORT_CONTAINER,
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_BUS_TRANSPORT_MAX,
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_BUS_TRANSPORT_INVALID = -1
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} BusTransport;
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int bus_async_unregister_and_quit(sd_event *e, sd_bus *bus, const char *name);
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int bus_event_loop_with_idle(sd_event *e, sd_bus *bus, const char *name, usec_t timeout);
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@ -39,6 +47,8 @@ void bus_verify_polkit_async_registry_free(sd_bus *bus, Hashmap *registry);
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int bus_open_system_systemd(sd_bus **_bus);
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int bus_open_transport(BusTransport transport, const char *host, bool user, sd_bus **bus);
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int bus_generic_print_property(const char *name, sd_bus_message *property, bool all);
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DEFINE_TRIVIAL_CLEANUP_FUNC(sd_bus*, sd_bus_unref);
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@ -27,7 +27,6 @@
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#include <locale.h>
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#include "sd-bus.h"
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#include "log.h"
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#include "util.h"
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#include "macro.h"
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@ -46,12 +45,8 @@ static bool arg_full = false;
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static bool arg_no_pager = false;
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static const char *arg_kill_who = NULL;
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static int arg_signal = SIGTERM;
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static enum transport {
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TRANSPORT_LOCAL,
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TRANSPORT_REMOTE,
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TRANSPORT_CONTAINER
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} arg_transport = TRANSPORT_LOCAL;
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static bool arg_ask_password = true;
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static BusTransport arg_transport = BUS_TRANSPORT_LOCAL;
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static char *arg_host = NULL;
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static void pager_open_if_enabled(void) {
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@ -126,7 +121,7 @@ static int show_scope_cgroup(sd_bus *bus, const char *unit, pid_t leader) {
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assert(bus);
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assert(unit);
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if (arg_transport == TRANSPORT_REMOTE)
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if (arg_transport == BUS_TRANSPORT_REMOTE)
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return 0;
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path = unit_dbus_path_from_name(unit);
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@ -628,12 +623,12 @@ static int parse_argv(int argc, char *argv[]) {
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break;
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case 'H':
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arg_transport = TRANSPORT_REMOTE;
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arg_transport = BUS_TRANSPORT_REMOTE;
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arg_host = optarg;
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break;
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case 'M':
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arg_transport = TRANSPORT_CONTAINER;
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arg_transport = BUS_TRANSPORT_CONTAINER;
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arg_host = optarg;
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break;
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@ -749,16 +744,9 @@ int main(int argc, char*argv[]) {
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goto finish;
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}
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if (arg_transport == TRANSPORT_LOCAL)
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r = sd_bus_open_system(&bus);
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else if (arg_transport == TRANSPORT_REMOTE)
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r = sd_bus_open_system_remote(arg_host, &bus);
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else if (arg_transport == TRANSPORT_CONTAINER)
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r = sd_bus_open_system_container(arg_host, &bus);
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else
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assert_not_reached("Uh, invalid transport...");
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r = bus_open_transport(arg_transport, arg_host, false, &bus);
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if (r < 0) {
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log_error("Failed to connect to machined: %s", strerror(-r));
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log_error("Failed to create bus connection: %s", strerror(-r));
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ret = EXIT_FAILURE;
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goto finish;
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}
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@ -30,12 +30,14 @@
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#include "path-util.h"
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static bool arg_scope = false;
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static bool arg_user = false;
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static bool arg_remain_after_exit = false;
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static const char *arg_unit = NULL;
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static const char *arg_description = NULL;
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static const char *arg_slice = NULL;
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static bool arg_send_sighup = false;
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static BusTransport arg_transport = BUS_TRANSPORT_LOCAL;
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static char *arg_host = NULL;
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static bool arg_user = false;
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static int help(void) {
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" -h --help Show this help\n"
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" --version Show package version\n"
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" --user Run as user unit\n"
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" -H --host=[USER@]HOST Operate on remote host\n"
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" -M --machine=CONTAINER Operate on local container\n"
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" --scope Run this as scope rather than service\n"
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" --unit=UNIT Run under the specified unit name\n"
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" --description=TEXT Description for unit\n"
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@ -77,6 +81,8 @@ static int parse_argv(int argc, char *argv[]) {
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{ "slice", required_argument, NULL, ARG_SLICE },
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{ "remain-after-exit", no_argument, NULL, 'r' },
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{ "send-sighup", no_argument, NULL, ARG_SEND_SIGHUP },
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{ "host", required_argument, NULL, 'H' },
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{ "machine", required_argument, NULL, 'M' },
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{ NULL, 0, NULL, 0 },
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};
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assert(argc >= 0);
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assert(argv);
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while ((c = getopt_long(argc, argv, "+hr", options, NULL)) >= 0) {
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while ((c = getopt_long(argc, argv, "+hrH:M:", options, NULL)) >= 0) {
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switch (c) {
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arg_remain_after_exit = true;
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break;
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case 'H':
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arg_transport = BUS_TRANSPORT_REMOTE;
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arg_host = optarg;
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break;
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case 'M':
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arg_transport = BUS_TRANSPORT_CONTAINER;
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arg_host = optarg;
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break;
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case '?':
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return -EINVAL;
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return -EINVAL;
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}
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if (arg_user && arg_transport != BUS_TRANSPORT_LOCAL) {
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log_error("Execution in user context is not supported on non-local systems.");
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return -EINVAL;
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}
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if (arg_scope && arg_transport != BUS_TRANSPORT_LOCAL) {
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log_error("Scope execution is not supported on non-local systems.");
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return -EINVAL;
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}
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return 1;
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}
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arg_description = description;
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}
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if (arg_user)
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r = sd_bus_open_user(&bus);
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else
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r = sd_bus_open_system(&bus);
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r = bus_open_transport(arg_transport, arg_host, arg_user, &bus);
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if (r < 0) {
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log_error("Failed to create new bus connection: %s", strerror(-r));
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log_error("Failed to create bus connection: %s", strerror(-r));
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goto fail;
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}
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