/** Find out if a container needs setting osrelease,
* and set it if needed. */
static void get_osrelease(vps_res *res)
{
char *dist;
char osrelease[MAX_OSREL_LEN] = "";
struct utsname uts;
char *suffix;
int len;
dist = get_dist_name(&res->tmpl);
if (!dist)
return;
read_osrelease_conf(dist, osrelease);
if (osrelease[0] == '\0') {
free(dist);
return;
}
logger(1, 0, "Found osrelease %s for dist %s", osrelease, dist);
free(dist);
/* Check if current osrelease is sufficient */
if (uname(&uts) != 0) {
logger(-1, errno, "Error in uname()");
return;
}
if (compare_osrelease(uts.release, osrelease) < 1)
/* -1: error; 0: current version is good enough */
return;
/* Yes we need to set osrelease for this container */
/* Make version look like our kernel, i.e. add suffix
* like -028stab078.10 to osrelease
*/
if ((suffix = strchr(uts.release, '-')) != NULL) {
len = sizeof(osrelease) - strlen(osrelease);
strncat(osrelease, suffix, len);
osrelease[sizeof(osrelease) - 1] = 0;
}
logger(1, 0, "Set osrelease=%s", osrelease);
res->env.osrelease = strdup(osrelease);
}
int vps_start_custom(vps_handler *h, envid_t veid, vps_param *param,
skipFlags skip, struct mod_action *mod,
env_create_FN fn, void *data)
{
int wait_p[2];
int old_wait_p[2];
int err_p[2];
int ret, err;
char buf[64];
char *dist_name;
struct sigaction act;
vps_res *res = ¶m->res;
dist_actions actions;
memset(&actions, 0, sizeof(actions));
if (check_var(res->fs.root, "VE_ROOT is not set"))
return VZ_VE_ROOT_NOTSET;
if (vps_is_run(h, veid)) {
logger(-1, 0, "Container is already running");
return VZ_VE_RUNNING;
}
if ((ret = check_ub(&res->ub)))
return ret;
dist_name = get_dist_name(&res->tmpl);
ret = read_dist_actions(dist_name, DIST_DIR, &actions);
free(dist_name);
if (ret)
return ret;
logger(0, 0, "Starting container ...");
if (vps_is_mounted(res->fs.root)) {
/* if CT is mounted -- umount first, to cleanup mount state */
vps_umount(h, veid, res->fs.root, skip);
}
if (!vps_is_mounted(res->fs.root)) {
/* increase quota to perform setup */
quota_inc(&res->dq, 100);
if ((ret = vps_mount(h, veid, &res->fs, &res->dq, skip)))
return ret;
quota_inc(&res->dq, -100);
}
/* Fedora 14/15 hacks */
if (fix_ve_devconsole(res->fs.root) != 0)
return VZ_FS_BAD_TMPL;
if (fix_ve_systemd(res->fs.root) != 0)
return VZ_FS_BAD_TMPL;
if (pipe(wait_p) < 0) {
logger(-1, errno, "Can not create pipe");
return VZ_RESOURCE_ERROR;
}
/* old_wait_p is needed for backward compatibility with older kernels,
* while for recent ones (that support CPT_SET_LOCKFD2) we use wait_p.
*
* If old_wait_p is closed without writing any data, it's "OK to go"
* signal, and if data are received from old_wait_p it's "no go"
* signal". Note that such thing doesn't work if vzctl segfaults,
* because in this case the descriptor will be closed without
* sending data.
*/
if (pipe(old_wait_p) < 0) {
logger(-1, errno, "Can not create pipe");
return VZ_RESOURCE_ERROR;
}
if (pipe(err_p) < 0) {
close(wait_p[0]);
close(wait_p[1]);
logger(-1, errno, "Can not create pipe");
return VZ_RESOURCE_ERROR;
}
sigemptyset(&act.sa_mask);
act.sa_handler = SIG_IGN;
act.sa_flags = 0;
sigaction(SIGPIPE, &act, NULL);
fix_numiptent(&res->ub);
fix_cpu(&res->cpu);
ret = vz_env_create(h, veid, res, wait_p,
old_wait_p, err_p, fn, data);
if (ret)
goto err;
if ((ret = vps_setup_res(h, veid, &actions, &res->fs, param,
STATE_STARTING, skip, mod)))
{
goto err;
}
if (!(skip & SKIP_ACTION_SCRIPT)) {
snprintf(buf, sizeof(buf), VPS_CONF_DIR "%d.%s", veid,
START_PREFIX);
if (stat_file(buf)) {
if (vps_exec_script(h, veid, res->fs.root, NULL, NULL,
buf, NULL, 0))
{
ret = VZ_ACTIONSCRIPT_ERROR;
goto err;
}
}
}
/* Tell the child that it's time to start /sbin/init */
err = 0;
if (write(wait_p[1], &err, sizeof(err)) != sizeof(err))
logger(-1, errno, "Unable to write to waitfd to start init");
close(wait_p[1]);
close(old_wait_p[1]);
err:
free_dist_actions(&actions);
if (ret) {
/* Kill environment */
logger(-1, 0, "Container start failed (try to check kernel "
"messages, e.g. \"dmesg | tail\")");
/* Close wait fd without writing anything to it
* to signal the child that we have failed to configure
* the environment, so it should not start /sbin/init
*/
close(wait_p[1]);
write(old_wait_p[1], &err, sizeof(err));
close(old_wait_p[1]);
} else {
if (!read(err_p[0], &ret, sizeof(ret))) {
if (res->misc.wait == YES) {
logger(0, 0, "Container start in progress"
", waiting ...");
err = vps_execFn(h, veid, res->fs.root,
wait_on_fifo, NULL, 0);
if (err) {
logger(0, 0, "Container wait failed%s",
err == VZ_EXEC_TIMEOUT ? \
" - timeout expired" : "");
ret = VZ_WAIT_FAILED;
} else {
logger(0, 0, "Container started"
" successfully");
}
} else {
logger(0, 0, "Container start in progress...");
}
} else {
if (ret == VZ_FS_BAD_TMPL)
logger(-1, 0, "Unable to start init, probably"
" incorrect template");
logger(-1, 0, "Container start failed");
}
}
if (ret) {
if (vps_is_run(h, veid))
env_stop(h, veid, res->fs.root, M_KILL);
/* restore original quota values */
vps_set_quota(veid, &res->dq);
if (vps_is_mounted(res->fs.root))
vps_umount(h, veid, res->fs.root, skip);
}
close(wait_p[0]);
close(wait_p[1]);
close(err_p[0]);
close(err_p[1]);
return ret;
}
