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/*
* Copyright 2013-2024 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/pengine/rules.h>
#include <crm/common/cmdline_internal.h>
#include <crm/common/iso8601.h>
#include <crm/common/ipc.h>
#include <crm/common/ipc_internal.h>
#include <crm/common/output_internal.h>
#include <crm/common/xml.h>
#include <crm/cluster/internal.h>
#include <crm/common/attrs_internal.h>
#include "pacemaker-attrd.h"
#define SUMMARY "daemon for managing Pacemaker node attributes"
gboolean stand_alone = FALSE;
gchar **log_files = NULL;
static GOptionEntry entries[] = {
{ "stand-alone", 's', G_OPTION_FLAG_NONE, G_OPTION_ARG_NONE, &stand_alone,
"(Advanced use only) Run in stand-alone mode", NULL },
{ "logfile", 'l', G_OPTION_FLAG_NONE, G_OPTION_ARG_FILENAME_ARRAY,
&log_files, "Send logs to the additional named logfile", NULL },
{ NULL }
};
static pcmk__output_t *out = NULL;
static pcmk__supported_format_t formats[] = {
PCMK__SUPPORTED_FORMAT_NONE,
PCMK__SUPPORTED_FORMAT_TEXT,
PCMK__SUPPORTED_FORMAT_XML,
{ NULL, NULL, NULL }
};
lrmd_t *the_lrmd = NULL;
pcmk_cluster_t *attrd_cluster = NULL;
crm_trigger_t *attrd_config_read = NULL;
crm_exit_t attrd_exit_status = CRM_EX_OK;
static bool
ipc_already_running(void)
{
pcmk_ipc_api_t *old_instance = NULL;
int rc = pcmk_rc_ok;
rc = pcmk_new_ipc_api(&old_instance, pcmk_ipc_attrd);
if (rc != pcmk_rc_ok) {
return false;
}
rc = pcmk__connect_ipc(old_instance, pcmk_ipc_dispatch_sync, 2);
if (rc != pcmk_rc_ok) {
crm_debug("No existing %s manager instance found: %s",
pcmk_ipc_name(old_instance, true), pcmk_rc_str(rc));
pcmk_free_ipc_api(old_instance);
return false;
}
pcmk_disconnect_ipc(old_instance);
pcmk_free_ipc_api(old_instance);
return true;
}
static GOptionContext *
build_arg_context(pcmk__common_args_t *args, GOptionGroup **group) {
GOptionContext *context = NULL;
context = pcmk__build_arg_context(args, "text (default), xml", group, NULL);
pcmk__add_main_args(context, entries);
return context;
}
int
main(int argc, char **argv)
{
int rc = pcmk_rc_ok;
GError *error = NULL;
bool initialized = false;
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);
attrd_init_mainloop();
crm_log_preinit(NULL, argc, argv);
mainloop_add_signal(SIGTERM, attrd_shutdown);
pcmk__register_formats(output_group, formats);
if (!g_option_context_parse_strv(context, &processed_args, &error)) {
attrd_exit_status = CRM_EX_USAGE;
goto done;
}
rc = pcmk__output_new(&out, args->output_ty, args->output_dest, argv);
if ((rc != pcmk_rc_ok) || (out == NULL)) {
attrd_exit_status = CRM_EX_ERROR;
g_set_error(&error, PCMK__EXITC_ERROR, attrd_exit_status,
"Error creating output format %s: %s",
args->output_ty, pcmk_rc_str(rc));
goto done;
}
if (args->version) {
out->version(out, false);
goto done;
}
// Open additional log files
pcmk__add_logfiles(log_files, out);
crm_log_init(PCMK__VALUE_ATTRD, LOG_INFO, TRUE, FALSE, argc, argv, FALSE);
crm_notice("Starting Pacemaker node attribute manager%s",
stand_alone ? " in standalone mode" : "");
if (ipc_already_running()) {
const char *msg = "pacemaker-attrd is already active, aborting startup";
attrd_exit_status = CRM_EX_OK;
g_set_error(&error, PCMK__EXITC_ERROR, attrd_exit_status, "%s", msg);
crm_err("%s", msg);
goto done;
}
initialized = true;
attributes = pcmk__strkey_table(NULL, attrd_free_attribute);
/* Connect to the CIB before connecting to the cluster or listening for IPC.
* This allows us to assume the CIB is connected whenever we process a
* cluster or IPC message (which also avoids start-up race conditions).
*/
if (!stand_alone) {
if (attrd_cib_connect(30) != pcmk_ok) {
attrd_exit_status = CRM_EX_FATAL;
g_set_error(&error, PCMK__EXITC_ERROR, attrd_exit_status,
"Could not connect to the CIB");
goto done;
}
crm_info("CIB connection active");
}
if (attrd_cluster_connect() != pcmk_ok) {
attrd_exit_status = CRM_EX_FATAL;
g_set_error(&error, PCMK__EXITC_ERROR, attrd_exit_status,
"Could not connect to the cluster");
goto done;
}
crm_info("Cluster connection active");
// Initialization that requires the cluster to be connected
attrd_election_init();
if (!stand_alone) {
attrd_cib_init();
}
/* Set a private attribute for ourselves with the protocol version we
* support. This lets all nodes determine the minimum supported version
* across all nodes. It also ensures that the writer learns our node name,
* so it can send our attributes to the CIB.
*/
attrd_broadcast_protocol();
attrd_init_ipc();
crm_notice("Pacemaker node attribute manager successfully started and accepting connections");
attrd_run_mainloop();
done:
if (initialized) {
crm_info("Shutting down attribute manager");
attrd_election_fini();
attrd_ipc_fini();
attrd_lrmd_disconnect();
if (!stand_alone) {
attrd_cib_disconnect();
}
attrd_free_waitlist();
pcmk_cluster_free(attrd_cluster);
g_hash_table_destroy(attributes);
}
g_strfreev(processed_args);
pcmk__free_arg_context(context);
g_strfreev(log_files);
pcmk__output_and_clear_error(&error, out);
if (out != NULL) {
out->finish(out, attrd_exit_status, true, NULL);
pcmk__output_free(out);
}
pcmk__unregister_formats();
crm_exit(attrd_exit_status);
}
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