diff --git a/src/sbd-pacemaker.c b/src/sbd-pacemaker.c index 5f2dea6..772b265 100644 --- a/src/sbd-pacemaker.c +++ b/src/sbd-pacemaker.c @@ -1,617 +1,620 @@ /* * Copyright (C) 2013 Lars Marowsky-Bree * * Based on crm_mon.c, which was: * Copyright (C) 2004 Andrew Beekhof * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public * License as published by the Free Software Foundation; either * version 2 of the License, or (at your option) any later version. * * This software is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License for more details. * * You should have received a copy of the GNU General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */ /* TODO list: * * - Trying to shutdown a node if no devices are up will fail, since SBD * currently uses a message via the disk to achieve this. * * - Shutting down cluster nodes while the majority of devices is down * will eventually take the cluster below the quorum threshold, at which * time the remaining cluster nodes will all immediately suicide. * */ #include "sbd.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #ifdef SUPPORT_PLUGIN # include #endif #include #include enum pcmk_health { pcmk_health_unknown, pcmk_health_pending, pcmk_health_transient, pcmk_health_unclean, pcmk_health_shutdown, pcmk_health_online, pcmk_health_noquorum, }; extern int servant_count; static void clean_up(int rc); static void crm_diff_update(const char *event, xmlNode * msg); static int cib_connect(gboolean full); static void set_pcmk_health(enum pcmk_health healthy); static void notify_parent(void); static void compute_status(pe_working_set_t * data_set); static gboolean mon_refresh_state(gpointer user_data); static GMainLoop *mainloop = NULL; static guint timer_id_reconnect = 0; static guint timer_id_notify = 0; static int reconnect_msec = 1000; static enum pcmk_health pcmk_healthy = 0; static int cib_connected = 0; #ifdef SUPPORT_PLUGIN static guint timer_id_ais = 0; static enum cluster_type_e cluster_stack = pcmk_cluster_unknown; static struct timespec t_last_quorum; static int check_ais = 0; #endif #define LOGONCE(state, lvl, fmt, args...) do { \ if (last_state != state) { \ cl_log(lvl, fmt, ##args); \ last_state = state; \ } \ healthy = state; \ } while(0) static cib_t *cib = NULL; static xmlNode *current_cib = NULL; static long last_refresh = 0; static gboolean mon_timer_reconnect(gpointer data) { int rc = 0; if (timer_id_reconnect > 0) { g_source_remove(timer_id_reconnect); } rc = cib_connect(TRUE); if (rc != 0) { cl_log(LOG_WARNING, "CIB reconnect failed: %d", rc); timer_id_reconnect = g_timeout_add(reconnect_msec, mon_timer_reconnect, NULL); } else { cl_log(LOG_INFO, "CIB reconnect successful"); } return FALSE; } static void mon_cib_connection_destroy(gpointer user_data) { if (cib) { cl_log(LOG_WARNING, "Disconnected from CIB"); cib->cmds->signoff(cib); set_pcmk_health(pcmk_health_transient); timer_id_reconnect = g_timeout_add(reconnect_msec, mon_timer_reconnect, NULL); } cib_connected = 0; return; } static gboolean mon_timer_notify(gpointer data) { static int counter = 0; int counter_max = timeout_watchdog / timeout_loop; if (timer_id_notify > 0) { g_source_remove(timer_id_notify); } if (cib_connected) { if (counter == counter_max) { free_xml(current_cib); current_cib = get_cib_copy(cib); mon_refresh_state(NULL); counter = 0; } else { cib->cmds->noop(cib, 0); notify_parent(); counter++; } } timer_id_notify = g_timeout_add(timeout_loop * 1000, mon_timer_notify, NULL); return FALSE; } /* * Mainloop signal handler. */ static void mon_shutdown(int nsig) { clean_up(0); } static int cib_connect(gboolean full) { int rc = 0; CRM_CHECK(cib != NULL, return -EINVAL); cib_connected = 0; crm_xml_init(); if (cib->state != cib_connected_query && cib->state != cib_connected_command) { rc = cib->cmds->signon(cib, crm_system_name, cib_query); if (rc != 0) { return rc; } current_cib = get_cib_copy(cib); mon_refresh_state(NULL); if (full) { if (rc == 0) { rc = cib->cmds->set_connection_dnotify(cib, mon_cib_connection_destroy); if (rc == -EPROTONOSUPPORT) { /* Notification setup failed, won't be able to reconnect after failure */ rc = 0; } } if (rc == 0) { cib->cmds->del_notify_callback(cib, T_CIB_DIFF_NOTIFY, crm_diff_update); rc = cib->cmds->add_notify_callback(cib, T_CIB_DIFF_NOTIFY, crm_diff_update); } if (rc != 0) { /* Notification setup failed, could not monitor CIB actions */ clean_up(-rc); } } } if (!rc) { cib_connected = 1; } return rc; } #ifdef SUPPORT_PLUGIN static gboolean mon_timer_ais(gpointer data) { if (timer_id_ais > 0) { g_source_remove(timer_id_ais); } send_cluster_text(crm_class_quorum, NULL, TRUE, NULL, crm_msg_ais); /* The timer is set in the response processing */ return FALSE; } static void ais_membership_destroy(gpointer user_data) { cl_log(LOG_ERR, "AIS connection terminated - corosync down?"); #if SUPPORT_PLUGIN ais_fd_sync = -1; #endif /* TODO: Is recovery even worth it here? After all, this means * that corosync died ... */ exit(1); } static void ais_membership_dispatch(cpg_handle_t handle, const struct cpg_name *groupName, uint32_t nodeid, uint32_t pid, void *msg, size_t msg_len) { uint32_t kind = 0; const char *from = NULL; char *data = pcmk_message_common_cs(handle, nodeid, pid, msg, &kind, &from); if (!data) { return; } free(data); data = NULL; if (kind != crm_class_quorum) { return; } DBGLOG(LOG_INFO, "AIS quorum state: %d", (int)crm_have_quorum); clock_gettime(CLOCK_MONOTONIC, &t_last_quorum); timer_id_ais = g_timeout_add(timeout_loop * 1000, mon_timer_ais, NULL); return; } #endif static void compute_status(pe_working_set_t * data_set) { static int updates = 0; static int last_state = 0; static int ever_had_quorum = FALSE; int healthy = 0; struct timespec t_now; node_t *node = pe_find_node(data_set->nodes, local_uname); updates++; clock_gettime(CLOCK_MONOTONIC, &t_now); if (data_set->dc_node == NULL) { LOGONCE(pcmk_health_transient, LOG_INFO, "We don't have a DC right now."); goto out; } - if (node == NULL || node->details->online == FALSE) { + if (node == NULL) { LOGONCE(pcmk_health_unknown, LOG_WARNING, "Node state: UNKNOWN"); + } else if (node->details->online == FALSE) { + LOGONCE(pcmk_health_unknown, LOG_WARNING, "Node state: OFFLINE"); + } else if (node->details->unclean) { LOGONCE(pcmk_health_unclean, LOG_WARNING, "Node state: UNCLEAN"); } else if (node->details->pending) { LOGONCE(pcmk_health_pending, LOG_WARNING, "Node state: pending"); #if 0 } else if (node->details->shutdown) { LOGONCE(pcmk_health_shutdown, LOG_WARNING, "Node state: shutting down"); #endif } else { if (data_set->flags & pe_flag_have_quorum) { LOGONCE(pcmk_health_online, LOG_INFO, "Node state: online"); ever_had_quorum = TRUE; } else if(servant_count > 0) { LOGONCE(pcmk_health_noquorum, LOG_WARNING, "Quorum lost"); goto out; } else if(ever_had_quorum == FALSE) { LOGONCE(pcmk_health_online, LOG_INFO, "We do not have quorum yet"); } else { /* We lost quorum, and there are no disks present * Setting healthy > 2 here will result in us self-fencing */ switch (data_set->no_quorum_policy) { case no_quorum_freeze: LOGONCE(pcmk_health_transient, LOG_INFO, "Quorum lost: Freeze resources"); break; case no_quorum_stop: LOGONCE(pcmk_health_transient, LOG_INFO, "Quorum lost: Stop ALL resources"); break; case no_quorum_ignore: LOGONCE(pcmk_health_transient, LOG_INFO, "Quorum lost: Ignore"); break; case no_quorum_suicide: LOGONCE(pcmk_health_unclean, LOG_INFO, "Quorum lost: Self-fence"); break; } } } #ifdef SUPPORT_PLUGIN if (check_ais) { int quorum_age = t_now.tv_sec - t_last_quorum.tv_sec; if (quorum_age > (int)(timeout_io+timeout_loop)) { if (t_last_quorum.tv_sec != 0) LOGONCE(pcmk_health_transient, LOG_WARNING, "AIS: Quorum outdated"); } else if (crm_have_quorum) { LOGONCE(pcmk_health_online, LOG_INFO, "AIS: We have quorum"); } else { LOGONCE(pcmk_health_unclean, LOG_WARNING, "AIS: We do NOT have quorum"); } } #endif out: set_pcmk_health(healthy); return; } static void set_pcmk_health(enum pcmk_health healthy) { pcmk_healthy = healthy; notify_parent(); } static void notify_parent(void) { pid_t ppid; union sigval signal_value; memset(&signal_value, 0, sizeof(signal_value)); ppid = getppid(); if (ppid == 1) { /* Our parent died unexpectedly. Triggering * self-fence. */ cl_log(LOG_WARNING, "Our parent is dead."); do_reset(); } switch (pcmk_healthy) { case pcmk_health_pending: case pcmk_health_shutdown: case pcmk_health_transient: DBGLOG(LOG_INFO, "Not notifying parent: state transient (%d)", pcmk_healthy); break; case pcmk_health_unknown: case pcmk_health_unclean: case pcmk_health_noquorum: DBGLOG(LOG_WARNING, "Notifying parent: UNHEALTHY (%d)", pcmk_healthy); sigqueue(ppid, SIG_PCMK_UNHEALTHY, signal_value); break; case pcmk_health_online: DBGLOG(LOG_INFO, "Notifying parent: healthy"); sigqueue(ppid, SIG_LIVENESS, signal_value); break; default: DBGLOG(LOG_WARNING, "Notifying parent: UNHEALTHY %d", pcmk_healthy); sigqueue(ppid, SIG_PCMK_UNHEALTHY, signal_value); break; } } static crm_trigger_t *refresh_trigger = NULL; static gboolean mon_trigger_refresh(gpointer user_data) { mainloop_set_trigger(refresh_trigger); mon_refresh_state(NULL); return FALSE; } static void crm_diff_update(const char *event, xmlNode * msg) { int rc = -1; const char *op = NULL; long now = time(NULL); static int updates = 0; static mainloop_timer_t *refresh_timer = NULL; if(refresh_timer == NULL) { refresh_timer = mainloop_timer_add("refresh", 2000, FALSE, mon_trigger_refresh, NULL); refresh_trigger = mainloop_add_trigger(G_PRIORITY_LOW, mon_refresh_state, refresh_timer); } if (current_cib != NULL) { xmlNode *cib_last = current_cib; current_cib = NULL; rc = cib_apply_patch_event(msg, cib_last, ¤t_cib, LOG_DEBUG); free_xml(cib_last); switch(rc) { case -pcmk_err_diff_resync: case -pcmk_err_diff_failed: crm_warn("[%s] %s Patch aborted: %s (%d)", event, op, pcmk_strerror(rc), rc); break; case pcmk_ok: updates++; break; default: crm_notice("[%s] %s ABORTED: %s (%d)", event, op, pcmk_strerror(rc), rc); break; } } if (current_cib == NULL) { current_cib = get_cib_copy(cib); } /* Refresh * - immediately if the last update was more than 5s ago * - every 10 updates * - at most 2s after the last update */ if (updates > 10 || (now - last_refresh) > (reconnect_msec / 1000)) { mon_refresh_state(refresh_timer); updates = 0; } else { mainloop_set_trigger(refresh_trigger); mainloop_timer_start(refresh_timer); } } static gboolean mon_refresh_state(gpointer user_data) { xmlNode *cib_copy = NULL; pe_working_set_t data_set; if(current_cib == NULL) { return FALSE; } if(user_data) { mainloop_timer_t *timer = user_data; mainloop_timer_stop(timer); } cib_copy = copy_xml(current_cib); if (cli_config_update(&cib_copy, NULL, FALSE) == FALSE) { cl_log(LOG_WARNING, "cli_config_update() failed - forcing reconnect to CIB"); if (cib) { cib->cmds->signoff(cib); } } else { last_refresh = time(NULL); set_working_set_defaults(&data_set); data_set.input = cib_copy; data_set.flags |= pe_flag_have_stonith_resource; cluster_status(&data_set); compute_status(&data_set); cleanup_calculations(&data_set); } return FALSE; } static void clean_up(int rc) { if (cib != NULL) { cib->cmds->signoff(cib); cib_delete(cib); cib = NULL; } if (rc >= 0) { exit(rc); } return; } int servant_pcmk(const char *diskname, int mode, const void* argp) { int exit_code = 0; crm_cluster_t crm_cluster; cl_log(LOG_INFO, "Monitoring Pacemaker health"); set_proc_title("sbd: watcher: Pacemaker"); setenv("PCMK_watchdog", "true", 1); if(debug == 0) { /* We don't want any noisy crm messages */ set_crm_log_level(LOG_CRIT); } #ifdef SUPPORT_PLUGIN cluster_stack = get_cluster_type(); if (cluster_stack != pcmk_cluster_classic_ais) { check_ais = 0; } else { check_ais = 1; cl_log(LOG_INFO, "Legacy plug-in detected, AIS quorum check enabled"); if(is_openais_cluster()) { crm_cluster.destroy = ais_membership_destroy; crm_cluster.cpg.cpg_deliver_fn = ais_membership_dispatch; /* crm_cluster.cpg.cpg_confchg_fn = pcmk_cpg_membership; TODO? */ crm_cluster.cpg.cpg_confchg_fn = NULL; } while (!crm_cluster_connect(&crm_cluster)) { cl_log(LOG_INFO, "Waiting to sign in with cluster ..."); sleep(reconnect_msec / 1000); } } #endif if (current_cib == NULL) { cib = cib_new(); do { exit_code = cib_connect(TRUE); if (exit_code != 0) { sleep(reconnect_msec / 1000); } } while (exit_code == -ENOTCONN); if (exit_code != 0) { clean_up(-exit_code); } } mainloop = g_main_new(FALSE); mainloop_add_signal(SIGTERM, mon_shutdown); mainloop_add_signal(SIGINT, mon_shutdown); timer_id_notify = g_timeout_add(timeout_loop * 1000, mon_timer_notify, NULL); #ifdef SUPPORT_PLUGIN if (check_ais) { timer_id_ais = g_timeout_add(timeout_loop * 1000, mon_timer_ais, NULL); } #endif g_main_run(mainloop); g_main_destroy(mainloop); clean_up(0); return 0; /* never reached */ }