/* * 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 #include #include #include #include #include #include #include /* From join_dc... */ extern gboolean check_join_state(enum crmd_fsa_state cur_state, const char *source); void crmd_ha_msg_filter(xmlNode * msg) { if (AM_I_DC) { const char *sys_from = crm_element_value(msg, PCMK__XA_CRM_SYS_FROM); if (pcmk__str_eq(sys_from, CRM_SYSTEM_DC, pcmk__str_casei)) { const char *from = crm_element_value(msg, PCMK__XA_SRC); if (!pcmk__str_eq(from, controld_globals.our_nodename, pcmk__str_casei)) { int level = LOG_INFO; const char *op = crm_element_value(msg, PCMK__XA_CRM_TASK); /* make sure the election happens NOW */ if (controld_globals.fsa_state != S_ELECTION) { ha_msg_input_t new_input; level = LOG_WARNING; new_input.msg = msg; register_fsa_error_adv(C_FSA_INTERNAL, I_ELECTION, NULL, &new_input, __func__); } do_crm_log(level, "Another DC detected: %s (op=%s)", from, op); goto done; } } } else { const char *sys_to = crm_element_value(msg, PCMK__XA_CRM_SYS_TO); if (pcmk__str_eq(sys_to, CRM_SYSTEM_DC, pcmk__str_casei)) { return; } } /* crm_log_xml_trace(msg, "HA[inbound]"); */ route_message(C_HA_MESSAGE, msg); done: controld_trigger_fsa(); } /*! * \internal * \brief Check whether a node is online * * \param[in] node Node to check * * \retval -1 if completely dead * \retval 0 if partially alive * \retval 1 if completely alive */ static int node_alive(const crm_node_t *node) { if (pcmk_is_set(node->flags, crm_remote_node)) { // Pacemaker Remote nodes can't be partially alive return pcmk__str_eq(node->state, CRM_NODE_MEMBER, pcmk__str_casei) ? 1: -1; } else if (pcmk__cluster_is_node_active(node)) { // Completely up cluster node: both cluster member and peer return 1; } else if (!pcmk_is_set(node->processes, crm_get_cluster_proc()) && !pcmk__str_eq(node->state, CRM_NODE_MEMBER, pcmk__str_casei)) { // Completely down cluster node: neither cluster member nor peer return -1; } // Partially up cluster node: only cluster member or only peer return 0; } #define state_text(state) ((state)? (const char *)(state) : "in unknown state") void peer_update_callback(enum crm_status_type type, crm_node_t * node, const void *data) { uint32_t old = 0; bool appeared = FALSE; bool is_remote = pcmk_is_set(node->flags, crm_remote_node); controld_node_pending_timer(node); /* The controller waits to receive some information from the membership * layer before declaring itself operational. If this is being called for a * cluster node, indicate that we have it. */ if (!is_remote) { controld_set_fsa_input_flags(R_PEER_DATA); } if (type == crm_status_processes && pcmk_is_set(node->processes, crm_get_cluster_proc()) && !AM_I_DC && !is_remote) { /* * This is a hack until we can send to a nodeid and/or we fix node name lookups * These messages are ignored in crmd_ha_msg_filter() */ xmlNode *query = create_request(CRM_OP_HELLO, NULL, NULL, CRM_SYSTEM_CRMD, CRM_SYSTEM_CRMD, NULL); crm_debug("Sending hello to node %u so that it learns our node name", node->id); pcmk__cluster_send_message(node, crm_msg_crmd, query); free_xml(query); } if (node->uname == NULL) { return; } switch (type) { case crm_status_uname: /* If we've never seen the node, then it also won't be in the status section */ crm_info("%s node %s is now %s", (is_remote? "Remote" : "Cluster"), node->uname, state_text(node->state)); return; case crm_status_nstate: /* This callback should not be called unless the state actually * changed, but here's a failsafe just in case. */ CRM_CHECK(!pcmk__str_eq(data, node->state, pcmk__str_casei), return); crm_info("%s node %s is now %s (was %s)", (is_remote? "Remote" : "Cluster"), node->uname, state_text(node->state), state_text(data)); if (pcmk__str_eq(CRM_NODE_MEMBER, node->state, pcmk__str_casei)) { appeared = TRUE; if (!is_remote) { remove_stonith_cleanup(node->uname); } } else { controld_remove_failed_sync_node(node->uname); controld_remove_voter(node->uname); } crmd_alert_node_event(node); break; case crm_status_processes: CRM_CHECK(data != NULL, return); old = *(const uint32_t *)data; appeared = pcmk_is_set(node->processes, crm_get_cluster_proc()); { const char *dc_s = controld_globals.dc_name; if ((dc_s == NULL) && AM_I_DC) { dc_s = PCMK_VALUE_TRUE; } crm_info("Node %s is %s a peer " CRM_XS " DC=%s old=%#07x new=%#07x", node->uname, (appeared? "now" : "no longer"), pcmk__s(dc_s, ""), old, node->processes); } if (!pcmk_is_set((node->processes ^ old), crm_get_cluster_proc())) { /* Peer status did not change. This should not be possible, * since we don't track process flags other than peer status. */ crm_trace("Process flag %#7x did not change from %#7x to %#7x", crm_get_cluster_proc(), old, node->processes); return; } if (!appeared) { node->peer_lost = time(NULL); controld_remove_failed_sync_node(node->uname); controld_remove_voter(node->uname); } if (!pcmk_is_set(controld_globals.fsa_input_register, R_CIB_CONNECTED)) { crm_trace("Ignoring peer status change because not connected to CIB"); return; } else if (controld_globals.fsa_state == S_STOPPING) { crm_trace("Ignoring peer status change because stopping"); return; } if (!appeared && pcmk__str_eq(node->uname, controld_globals.our_nodename, pcmk__str_casei)) { /* Did we get evicted? */ crm_notice("Our peer connection failed"); register_fsa_input(C_CRMD_STATUS_CALLBACK, I_ERROR, NULL); } else if (pcmk__str_eq(node->uname, controld_globals.dc_name, pcmk__str_casei) && !pcmk__cluster_is_node_active(node)) { /* Did the DC leave us? */ crm_notice("Our peer on the DC (%s) is dead", controld_globals.dc_name); register_fsa_input(C_CRMD_STATUS_CALLBACK, I_ELECTION, NULL); /* @COMPAT DC < 1.1.13: If a DC shuts down normally, we don't * want to fence it. Newer DCs will send their shutdown request * to all peers, who will update the DC's expected state to * down, thus avoiding fencing. We can safely erase the DC's * transient attributes when it leaves in that case. However, * the only way to avoid fencing older DCs is to leave the * transient attributes intact until it rejoins. */ if (compare_version(controld_globals.dc_version, "3.0.9") > 0) { controld_delete_node_state(node->uname, controld_section_attrs, cib_scope_local); } } else if (AM_I_DC || pcmk_is_set(controld_globals.flags, controld_dc_left) || (controld_globals.dc_name == NULL)) { /* This only needs to be done once, so normally the DC should do * it. However if there is no DC, every node must do it, since * there is no other way to ensure some one node does it. */ if (appeared) { te_trigger_stonith_history_sync(FALSE); } else { controld_delete_node_state(node->uname, controld_section_attrs, cib_scope_local); } } break; } if (AM_I_DC) { xmlNode *update = NULL; int flags = node_update_peer; int alive = node_alive(node); pcmk__graph_action_t *down = match_down_event(node->uuid); crm_trace("Alive=%d, appeared=%d, down=%d", alive, appeared, (down? down->id : -1)); if (appeared && (alive > 0) && !is_remote) { register_fsa_input_before(C_FSA_INTERNAL, I_NODE_JOIN, NULL); } if (down) { const char *task = crm_element_value(down->xml, PCMK_XA_OPERATION); if (pcmk__str_eq(task, PCMK_ACTION_STONITH, pcmk__str_casei)) { /* tengine_stonith_callback() confirms fence actions */ crm_trace("Updating CIB %s fencer reported fencing of %s complete", (pcmk_is_set(down->flags, pcmk__graph_action_confirmed)? "after" : "before"), node->uname); } else if (!appeared && pcmk__str_eq(task, PCMK_ACTION_DO_SHUTDOWN, pcmk__str_casei)) { // Shutdown actions are immediately confirmed (i.e. no_wait) if (!is_remote) { flags |= node_update_join | node_update_expected; crmd_peer_down(node, FALSE); check_join_state(controld_globals.fsa_state, __func__); } if (alive >= 0) { crm_info("%s of peer %s is in progress " CRM_XS " action=%d", task, node->uname, down->id); } else { crm_notice("%s of peer %s is complete " CRM_XS " action=%d", task, node->uname, down->id); pcmk__update_graph(controld_globals.transition_graph, down); trigger_graph(); } } else { crm_trace("Node %s is %s, was expected to %s (op %d)", node->uname, ((alive > 0)? "alive" : ((alive < 0)? "dead" : "partially alive")), task, down->id); } } else if (appeared == FALSE) { if ((controld_globals.transition_graph == NULL) || (controld_globals.transition_graph->id == -1)) { crm_info("Stonith/shutdown of node %s is unknown to the " "current DC", node->uname); } else { crm_warn("Stonith/shutdown of node %s was not expected", node->uname); } if (!is_remote) { crm_update_peer_join(__func__, node, crm_join_none); check_join_state(controld_globals.fsa_state, __func__); } abort_transition(PCMK_SCORE_INFINITY, pcmk__graph_restart, "Node failure", NULL); fail_incompletable_actions(controld_globals.transition_graph, node->uuid); } else { crm_trace("Node %s came up, was not expected to be down", node->uname); } if (is_remote) { /* A pacemaker_remote node won't have its cluster status updated * in the CIB by membership-layer callbacks, so do it here. */ flags |= node_update_cluster; /* Trigger resource placement on newly integrated nodes */ if (appeared) { abort_transition(PCMK_SCORE_INFINITY, pcmk__graph_restart, "Pacemaker Remote node integrated", NULL); } } if (!appeared && (type == crm_status_processes) && (node->when_member > 1)) { /* The node left CPG but is still a cluster member. Set its * membership time to 1 to record it in the cluster state as a * boolean, so we don't fence it due to * PCMK_OPT_NODE_PENDING_TIMEOUT. */ node->when_member = 1; flags |= node_update_cluster; controld_node_pending_timer(node); } /* Update the CIB node state */ update = create_node_state_update(node, flags, NULL, __func__); if (update == NULL) { crm_debug("Node state update not yet possible for %s", node->uname); } else { fsa_cib_anon_update(PCMK_XE_STATUS, update); } free_xml(update); } controld_trigger_fsa(); } gboolean crm_fsa_trigger(gpointer user_data) { crm_trace("Invoked (queue len: %d)", g_list_length(controld_globals.fsa_message_queue)); s_crmd_fsa(C_FSA_INTERNAL); crm_trace("Exited (queue len: %d)", g_list_length(controld_globals.fsa_message_queue)); return TRUE; }