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pacemaker-controld.c
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/*
* Copyright 2004-2024 the Pacemaker project contributors
*
* The version control history for this file may have further details.
*
* This source code is licensed under the GNU General Public License version 2
* or later (GPLv2+) WITHOUT ANY WARRANTY.
*/
#include <crm_internal.h>
#include <sys/param.h>
#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <stdlib.h>
#include <errno.h>
#include <fcntl.h>
#include <crm/crm.h>
#include <crm/common/cmdline_internal.h>
#include <crm/common/ipc.h>
#include <crm/common/output_internal.h>
#include <crm/common/xml.h>
#include <pacemaker-controld.h>
#define SUMMARY "daemon for coordinating a Pacemaker cluster's response " \
"to events"
_Noreturn void crmd_init(void);
extern void init_dotfile(void);
controld_globals_t controld_globals = {
// Automatic initialization to 0, false, or NULL is fine for most members
.fsa_state = S_STARTING,
.fsa_actions = A_NOTHING,
};
static pcmk__supported_format_t formats[] = {
PCMK__SUPPORTED_FORMAT_NONE,
PCMK__SUPPORTED_FORMAT_TEXT,
PCMK__SUPPORTED_FORMAT_XML,
{ NULL, NULL, NULL }
};
/* @COMPAT Deprecated since 2.1.8. Use pcmk_list_cluster_options() or
* crm_attribute --list-options=cluster instead of querying daemon metadata.
*
* NOTE: pcs (as of at least 0.11.8) uses this
*/
static int
controld_metadata(pcmk__output_t *out)
{
return pcmk__daemon_metadata(out, PCMK__SERVER_CONTROLD,
"Pacemaker controller options",
"Cluster options used by Pacemaker's "
"controller",
pcmk__opt_controld);
}
static GOptionContext *
build_arg_context(pcmk__common_args_t *args, GOptionGroup **group)
{
return pcmk__build_arg_context(args, "text (default), xml", group, NULL);
}
int
main(int argc, char **argv)
{
int rc = pcmk_rc_ok;
crm_exit_t exit_code = CRM_EX_OK;
bool initialize = true;
crm_ipc_t *old_instance = NULL;
pcmk__output_t *out = NULL;
GError *error = NULL;
GOptionGroup *output_group = NULL;
pcmk__common_args_t *args = pcmk__new_common_args(SUMMARY);
gchar **processed_args = pcmk__cmdline_preproc(argv, NULL);
GOptionContext *context = build_arg_context(args, &output_group);
crm_log_preinit(NULL, argc, argv);
pcmk__register_formats(output_group, formats);
if (!g_option_context_parse_strv(context, &processed_args, &error)) {
exit_code = CRM_EX_USAGE;
goto done;
}
rc = pcmk__output_new(&out, args->output_ty, args->output_dest, argv);
if (rc != pcmk_rc_ok) {
exit_code = CRM_EX_ERROR;
g_set_error(&error, PCMK__EXITC_ERROR, exit_code,
"Error creating output format %s: %s",
args->output_ty, pcmk_rc_str(rc));
goto done;
}
if (args->version) {
out->version(out, false);
initialize = false;
goto done;
}
if ((g_strv_length(processed_args) >= 2)
&& pcmk__str_eq(processed_args[1], "metadata", pcmk__str_none)) {
initialize = false;
rc = controld_metadata(out);
if (rc != pcmk_rc_ok) {
exit_code = CRM_EX_FATAL;
g_set_error(&error, PCMK__EXITC_ERROR, exit_code,
"Unable to display metadata: %s", pcmk_rc_str(rc));
}
goto done;
}
pcmk__cli_init_logging(PCMK__SERVER_CONTROLD, args->verbosity);
crm_log_init(NULL, LOG_INFO, TRUE, FALSE, argc, argv, FALSE);
crm_notice("Starting Pacemaker controller");
old_instance = crm_ipc_new(CRM_SYSTEM_CRMD, 0);
if (old_instance == NULL) {
/* crm_ipc_new will have already printed an error message with crm_err. */
exit_code = CRM_EX_FATAL;
goto done;
}
if (pcmk__connect_generic_ipc(old_instance) == pcmk_rc_ok) {
/* IPC end-point already up */
crm_ipc_close(old_instance);
crm_ipc_destroy(old_instance);
crm_crit("Aborting start-up because another controller instance is "
"already active");
initialize = false;
goto done;
} else {
/* not up or not authentic, we'll proceed either way */
crm_ipc_destroy(old_instance);
old_instance = NULL;
}
if (pcmk__daemon_can_write(PCMK_SCHEDULER_INPUT_DIR, NULL) == FALSE) {
exit_code = CRM_EX_FATAL;
crm_err("Terminating due to bad permissions on " PCMK_SCHEDULER_INPUT_DIR);
g_set_error(&error, PCMK__EXITC_ERROR, exit_code,
"Bad permissions on " PCMK_SCHEDULER_INPUT_DIR
" (see logs for details)");
goto done;
} else if (pcmk__daemon_can_write(CRM_CONFIG_DIR, NULL) == FALSE) {
exit_code = CRM_EX_FATAL;
crm_err("Terminating due to bad permissions on " CRM_CONFIG_DIR);
g_set_error(&error, PCMK__EXITC_ERROR, exit_code,
"Bad permissions on " CRM_CONFIG_DIR
" (see logs for details)");
goto done;
}
if (pcmk__log_output_new(&(controld_globals.logger_out)) != pcmk_rc_ok) {
exit_code = CRM_EX_FATAL;
goto done;
}
pcmk__output_set_log_level(controld_globals.logger_out, LOG_TRACE);
done:
g_strfreev(processed_args);
pcmk__free_arg_context(context);
pcmk__output_and_clear_error(&error, out);
if (out != NULL) {
out->finish(out, exit_code, true, NULL);
pcmk__output_free(out);
}
pcmk__unregister_formats();
if ((exit_code == CRM_EX_OK) && initialize) {
// Does not return
crmd_init();
}
crm_exit(exit_code);
}
void
crmd_init(void)
{
crm_exit_t exit_code = CRM_EX_OK;
enum crmd_fsa_state state;
init_dotfile();
register_fsa_input(C_STARTUP, I_STARTUP, NULL);
pcmk__cluster_init_node_caches();
state = s_crmd_fsa(C_STARTUP);
if (state == S_PENDING || state == S_STARTING) {
/* Create the mainloop and run it... */
crm_trace("Starting %s's mainloop", crm_system_name);
controld_globals.mainloop = g_main_loop_new(NULL, FALSE);
g_main_loop_run(controld_globals.mainloop);
if (pcmk_is_set(controld_globals.fsa_input_register, R_STAYDOWN)) {
crm_info("Inhibiting automated respawn");
exit_code = CRM_EX_FATAL;
}
} else {
crm_err("Startup of %s failed. Current state: %s",
crm_system_name, fsa_state2string(state));
exit_code = CRM_EX_ERROR;
}
crm_info("%s[%lu] exiting with status %d (%s)",
crm_system_name, (unsigned long) getpid(), exit_code,
crm_exit_str(exit_code));
crmd_fast_exit(exit_code);
}

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pacemaker-controld.c (6 KB)

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