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Diffstat (limited to 'source4/cluster/ctdb/server/ctdb_monitor.c')
-rw-r--r--source4/cluster/ctdb/server/ctdb_monitor.c227
1 files changed, 0 insertions, 227 deletions
diff --git a/source4/cluster/ctdb/server/ctdb_monitor.c b/source4/cluster/ctdb/server/ctdb_monitor.c
deleted file mode 100644
index ec5244703c..0000000000
--- a/source4/cluster/ctdb/server/ctdb_monitor.c
+++ /dev/null
@@ -1,227 +0,0 @@
-/*
- monitoring links to all other nodes to detect dead nodes
-
-
- Copyright (C) Ronnie Sahlberg 2007
-
- 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 3 of the License, or
- (at your option) any later version.
-
- This program 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 program; if not, see <http://www.gnu.org/licenses/>.
-*/
-
-#include "includes.h"
-#include "lib/events/events.h"
-#include "system/filesys.h"
-#include "system/wait.h"
-#include "../include/ctdb_private.h"
-
-/*
- see if any nodes are dead
- */
-static void ctdb_check_for_dead_nodes(struct event_context *ev, struct timed_event *te,
- struct timeval t, void *private_data)
-{
- struct ctdb_context *ctdb = talloc_get_type(private_data, struct ctdb_context);
- int i;
-
- if (ctdb->monitoring_mode == CTDB_MONITORING_DISABLED) {
- event_add_timed(ctdb->ev, ctdb->monitor_context,
- timeval_current_ofs(ctdb->tunable.keepalive_interval, 0),
- ctdb_check_for_dead_nodes, ctdb);
- return;
- }
-
- /* send a keepalive to all other nodes, unless */
- for (i=0;i<ctdb->num_nodes;i++) {
- struct ctdb_node *node = ctdb->nodes[i];
- if (node->vnn == ctdb->vnn) {
- continue;
- }
-
- if (node->flags & NODE_FLAGS_DISCONNECTED) {
- /* it might have come alive again */
- if (node->rx_cnt != 0) {
- ctdb_node_connected(node);
- }
- continue;
- }
-
-
- if (node->rx_cnt == 0) {
- node->dead_count++;
- } else {
- node->dead_count = 0;
- }
-
- node->rx_cnt = 0;
-
- if (node->dead_count >= ctdb->tunable.keepalive_limit) {
- DEBUG(0,("dead count reached for node %u\n", node->vnn));
- ctdb_node_dead(node);
- ctdb_send_keepalive(ctdb, node->vnn);
- /* maybe tell the transport layer to kill the
- sockets as well?
- */
- continue;
- }
-
- if (node->tx_cnt == 0) {
- DEBUG(5,("sending keepalive to %u\n", node->vnn));
- ctdb_send_keepalive(ctdb, node->vnn);
- }
-
- node->tx_cnt = 0;
- }
-
- event_add_timed(ctdb->ev, ctdb->monitor_context,
- timeval_current_ofs(ctdb->tunable.keepalive_interval, 0),
- ctdb_check_for_dead_nodes, ctdb);
-}
-
-static void ctdb_check_health(struct event_context *ev, struct timed_event *te,
- struct timeval t, void *private_data);
-
-/*
- called when a health monitoring event script finishes
- */
-static void ctdb_health_callback(struct ctdb_context *ctdb, int status, void *p)
-{
- struct ctdb_node *node = ctdb->nodes[ctdb->vnn];
- TDB_DATA data;
- struct ctdb_node_flag_change c;
-
- event_add_timed(ctdb->ev, ctdb->monitor_context,
- timeval_current_ofs(ctdb->tunable.monitor_interval, 0),
- ctdb_check_health, ctdb);
-
- if (status != 0 && !(node->flags & NODE_FLAGS_UNHEALTHY)) {
- DEBUG(0,("monitor event failed - disabling node\n"));
- node->flags |= NODE_FLAGS_UNHEALTHY;
- } else if (status == 0 && (node->flags & NODE_FLAGS_UNHEALTHY)) {
- DEBUG(0,("monitor event OK - node re-enabled\n"));
- ctdb->nodes[ctdb->vnn]->flags &= ~NODE_FLAGS_UNHEALTHY;
- } else {
- /* no change */
- return;
- }
-
- c.vnn = ctdb->vnn;
- c.flags = node->flags;
-
- data.dptr = (uint8_t *)&c;
- data.dsize = sizeof(c);
-
- /* tell the other nodes that something has changed */
- ctdb_daemon_send_message(ctdb, CTDB_BROADCAST_CONNECTED,
- CTDB_SRVID_NODE_FLAGS_CHANGED, data);
-
-}
-
-
-/*
- see if the event scripts think we are healthy
- */
-static void ctdb_check_health(struct event_context *ev, struct timed_event *te,
- struct timeval t, void *private_data)
-{
- struct ctdb_context *ctdb = talloc_get_type(private_data, struct ctdb_context);
- int ret;
-
- if (ctdb->monitoring_mode == CTDB_MONITORING_DISABLED) {
- event_add_timed(ctdb->ev, ctdb->monitor_context,
- timeval_current_ofs(ctdb->tunable.monitor_interval, 0),
- ctdb_check_health, ctdb);
- return;
- }
-
- ret = ctdb_event_script_callback(ctdb,
- timeval_current_ofs(ctdb->tunable.script_timeout, 0),
- ctdb->monitor_context, ctdb_health_callback, ctdb, "monitor");
- if (ret != 0) {
- DEBUG(0,("Unable to launch monitor event script\n"));
- event_add_timed(ctdb->ev, ctdb->monitor_context,
- timeval_current_ofs(ctdb->tunable.monitor_interval, 0),
- ctdb_check_health, ctdb);
- }
-}
-
-/* stop any monitoring */
-void ctdb_stop_monitoring(struct ctdb_context *ctdb)
-{
- talloc_free(ctdb->monitor_context);
- ctdb->monitor_context = talloc_new(ctdb);
- CTDB_NO_MEMORY_FATAL(ctdb, ctdb->monitor_context);
-}
-
-/*
- start watching for nodes that might be dead
- */
-void ctdb_start_monitoring(struct ctdb_context *ctdb)
-{
- struct timed_event *te;
-
- ctdb_stop_monitoring(ctdb);
-
- te = event_add_timed(ctdb->ev, ctdb->monitor_context,
- timeval_current_ofs(ctdb->tunable.keepalive_interval, 0),
- ctdb_check_for_dead_nodes, ctdb);
- CTDB_NO_MEMORY_FATAL(ctdb, te);
-
- te = event_add_timed(ctdb->ev, ctdb->monitor_context,
- timeval_current_ofs(ctdb->tunable.monitor_interval, 0),
- ctdb_check_health, ctdb);
- CTDB_NO_MEMORY_FATAL(ctdb, te);
-}
-
-
-/*
- modify flags on a node
- */
-int32_t ctdb_control_modflags(struct ctdb_context *ctdb, TDB_DATA indata)
-{
- struct ctdb_node_modflags *m = (struct ctdb_node_modflags *)indata.dptr;
- TDB_DATA data;
- struct ctdb_node_flag_change c;
- struct ctdb_node *node = ctdb->nodes[ctdb->vnn];
- uint32_t old_flags = node->flags;
-
- node->flags |= m->set;
- node->flags &= ~m->clear;
-
- if (node->flags == old_flags) {
- /* no change */
- return 0;
- }
-
- DEBUG(0, ("Control modflags on node %u - flags now 0x%x\n", ctdb->vnn, node->flags));
-
- /* if we have been banned, go into recovery mode */
- c.vnn = ctdb->vnn;
- c.flags = node->flags;
-
- data.dptr = (uint8_t *)&c;
- data.dsize = sizeof(c);
-
- /* tell the other nodes that something has changed */
- ctdb_daemon_send_message(ctdb, CTDB_BROADCAST_CONNECTED,
- CTDB_SRVID_NODE_FLAGS_CHANGED, data);
-
- if ((node->flags & NODE_FLAGS_BANNED) && !(old_flags & NODE_FLAGS_BANNED)) {
- /* make sure we are frozen */
- DEBUG(0,("This node has been banned - forcing freeze and recovery\n"));
- ctdb_start_freeze(ctdb);
- ctdb_release_all_ips(ctdb);
- ctdb->recovery_mode = CTDB_RECOVERY_ACTIVE;
- }
-
- return 0;
-}
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