ctdb/server/ctdbd.c

   1 /*
   2    standalone ctdb daemon
   3
   4    Copyright (C) Andrew Tridgell  2006
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 3 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program; if not, see <http://www.gnu.org/licenses/>.
  18 */
  19
  20 #include "replace.h"
  21 #include "system/filesys.h"
  22 #include "system/time.h"
  23 #include "system/wait.h"
  24 #include "system/network.h"
  25 #include "system/syslog.h"
  26
  27 #include <popt.h>
  28 #include <talloc.h>
  29 /* Allow use of deprecated function tevent_loop_allow_nesting() */
  30 #define TEVENT_DEPRECATED
  31 #include <tevent.h>
  32
  33 #include "lib/util/debug.h"
  34 #include "lib/util/samba_util.h"
  35
  36 #include "ctdb_private.h"
  37
  38 #include "common/reqid.h"
  39 #include "common/system.h"
  40 #include "common/common.h"
  41 #include "common/path.h"
  42 #include "common/logging.h"
  43
  44 #include "conf/logging_conf.h"
  45 #include "conf/ctdb_config.h"
  46
  47 int script_log_level;
  48 bool fast_start;
  49
  50 /*
  51   called by the transport layer when a packet comes in
  52 */
  53 static void ctdb_recv_pkt(struct ctdb_context *ctdb, uint8_t *data, uint32_t length)
  54 {
  55         struct ctdb_req_header *hdr = (struct ctdb_req_header *)data;
  56
  57         CTDB_INCREMENT_STAT(ctdb, node_packets_recv);
  58
  59         /* up the counter for this source node, so we know its alive */
  60         if (ctdb_validate_pnn(ctdb, hdr->srcnode)) {
  61                 /* as a special case, redirected calls don't increment the rx_cnt */
  62                 if (hdr->operation != CTDB_REQ_CALL ||
  63                     ((struct ctdb_req_call_old *)hdr)->hopcount == 0) {
  64                         ctdb->nodes[hdr->srcnode]->rx_cnt++;
  65                 }
  66         }
  67
  68         ctdb_input_pkt(ctdb, hdr);
  69 }
  70
  71 static const struct ctdb_upcalls ctdb_upcalls = {
  72         .recv_pkt       = ctdb_recv_pkt,
  73         .node_dead      = ctdb_node_dead,
  74         .node_connected = ctdb_node_connected
  75 };
  76
  77 static struct ctdb_context *ctdb_init(struct tevent_context *ev)
  78 {
  79         int ret;
  80         struct ctdb_context *ctdb;
  81
  82         ctdb = talloc_zero(ev, struct ctdb_context);
  83         if (ctdb == NULL) {
  84                 DBG_ERR("Memory error\n");
  85                 return NULL;
  86         }
  87         ctdb->ev  = ev;
  88
  89         /* Wrap early to exercise code. */
  90         ret = reqid_init(ctdb, INT_MAX-200, &ctdb->idr);
  91         if (ret != 0) {
  92                 D_ERR("reqid_init failed (%s)\n", strerror(ret));
  93                 talloc_free(ctdb);
  94                 return NULL;
  95         }
  96
  97         ret = srvid_init(ctdb, &ctdb->srv);
  98         if (ret != 0) {
  99                 D_ERR("srvid_init failed (%s)\n", strerror(ret));
 100                 talloc_free(ctdb);
 101                 return NULL;
 102         }
 103
 104         ctdb->daemon.name = path_socket(ctdb, "ctdbd");
 105         if (ctdb->daemon.name == NULL) {
 106                 DBG_ERR("Memory allocation error\n");
 107                 talloc_free(ctdb);
 108                 return NULL;
 109         }
 110
 111         ctdbd_pidfile = path_pidfile(ctdb, "ctdbd");
 112         if (ctdbd_pidfile == NULL) {
 113                 DBG_ERR("Memory allocation error\n");
 114                 talloc_free(ctdb);
 115                 return NULL;
 116         }
 117
 118         gettimeofday(&ctdb->ctdbd_start_time, NULL);
 119
 120         gettimeofday(&ctdb->last_recovery_started, NULL);
 121         gettimeofday(&ctdb->last_recovery_finished, NULL);
 122
 123         ctdb->recovery_mode    = CTDB_RECOVERY_NORMAL;
 124
 125         ctdb->upcalls = &ctdb_upcalls;
 126
 127         ctdb->statistics.statistics_start_time = timeval_current();
 128
 129         ctdb->capabilities = CTDB_CAP_DEFAULT;
 130
 131         /*
 132          * Initialise this node's PNN to the unknown value.  This will
 133          * be set to the correct value by either ctdb_add_node() as
 134          * part of loading the nodes file or by
 135          * ctdb_tcp_listen_automatic() when the transport is
 136          * initialised.  At some point we should de-optimise this and
 137          * pull it out into ctdb_start_daemon() so it is done clearly
 138          * and only in one place.
 139          */
 140         ctdb->pnn = CTDB_UNKNOWN_PNN;
 141
 142         ctdb->do_checkpublicip = true;
 143
 144         return ctdb;
 145 }
 146
 147
 148 /*
 149   main program
 150 */
 151 int main(int argc, const char *argv[])
 152 {
 153         struct ctdb_context *ctdb = NULL;
 154         int interactive_opt = 0;
 155         bool interactive = false;
 156
 157         struct poptOption popt_options[] = {
 158                 POPT_AUTOHELP
 159                 { "interactive", 'i', POPT_ARG_NONE, &interactive_opt, 0,
 160                   "don't fork, log to stderr", NULL },
 161                 POPT_TABLEEND
 162         };
 163         int opt, ret;
 164         const char **extra_argv;
 165         poptContext pc;
 166         struct tevent_context *ev;
 167         const char *ctdb_base;
 168         struct conf_context *conf;
 169         const char *logging_location;
 170         const char *test_mode;
 171         bool ok;
 172
 173         setproctitle_init(argc, discard_const(argv), environ);
 174
 175         /*
 176          * Basic setup
 177          */
 178
 179         talloc_enable_null_tracking();
 180
 181         fault_setup();
 182
 183         ev = tevent_context_init(NULL);
 184         if (ev == NULL) {
 185                 fprintf(stderr, "tevent_context_init() failed\n");
 186                 exit(1);
 187         }
 188         tevent_loop_allow_nesting(ev);
 189
 190         ctdb = ctdb_init(ev);
 191         if (ctdb == NULL) {
 192                 fprintf(stderr, "Failed to init ctdb\n");
 193                 exit(1);
 194         }
 195
 196         /* Default value for CTDB_BASE - don't override */
 197         setenv("CTDB_BASE", CTDB_ETCDIR, 0);
 198         ctdb_base = getenv("CTDB_BASE");
 199         if (ctdb_base == NULL) {
 200                 D_ERR("CTDB_BASE not set\n");
 201                 exit(1);
 202         }
 203
 204         /*
 205          * Command-line option handling
 206          */
 207
 208         pc = poptGetContext(argv[0], argc, argv, popt_options, POPT_CONTEXT_KEEP_FIRST);
 209
 210         while ((opt = poptGetNextOpt(pc)) != -1) {
 211                 switch (opt) {
 212                 default:
 213                         fprintf(stderr, "Invalid option %s: %s\n",
 214                                 poptBadOption(pc, 0), poptStrerror(opt));
 215                         goto fail;
 216                 }
 217         }
 218
 219         /* If there are extra arguments then exit with usage message */
 220         extra_argv = poptGetArgs(pc);
 221         if (extra_argv) {
 222                 extra_argv++;
 223                 if (extra_argv[0])  {
 224                         poptPrintHelp(pc, stdout, 0);
 225                         goto fail;
 226                 }
 227         }
 228
 229         interactive = (interactive_opt != 0);
 230
 231         /*
 232          * Configuration file handling
 233          */
 234
 235         ret = ctdb_config_load(ctdb, &conf);
 236         if (ret != 0) {
 237                 /* ctdb_config_load() logs the failure */
 238                 goto fail;
 239         }
 240
 241         /*
 242          * Logging setup/options
 243          */
 244
 245         test_mode = getenv("CTDB_TEST_MODE");
 246
 247         /* Log to stderr (ignoring configuration) when running as interactive */
 248         if (interactive) {
 249                 logging_location = "file:";
 250                 setenv("CTDB_INTERACTIVE", "true", 1);
 251         } else {
 252                 logging_location = logging_conf_location(conf);
 253         }
 254
 255         if (strcmp(logging_location, "syslog") != 0 && test_mode == NULL) {
 256                 /* This can help when CTDB logging is misconfigured */
 257                 syslog(LOG_DAEMON|LOG_NOTICE,
 258                        "CTDB logging to location %s",
 259                        logging_location);
 260         }
 261
 262         /* Initialize logging and set the debug level */
 263         ok = ctdb_logging_init(ctdb,
 264                                logging_location,
 265                                logging_conf_log_level(conf));
 266         if (!ok) {
 267                 goto fail;
 268         }
 269         setenv("CTDB_LOGGING", logging_location, 1);
 270         setenv("CTDB_DEBUGLEVEL", debug_level_to_string(DEBUGLEVEL), 1);
 271
 272         script_log_level = debug_level_from_string(
 273                                         ctdb_config.script_log_level);
 274
 275         D_NOTICE("CTDB starting on node\n");
 276
 277         /*
 278          * Cluster setup/options
 279          */
 280
 281         ret = ctdb_set_transport(ctdb, ctdb_config.transport);
 282         if (ret == -1) {
 283                 D_ERR("ctdb_set_transport failed - %s\n", ctdb_errstr(ctdb));
 284                 goto fail;
 285         }
 286
 287         if (ctdb_config.cluster_lock != NULL) {
 288                 ctdb->recovery_lock = ctdb_config.cluster_lock;
 289         } else if (ctdb_config.recovery_lock != NULL) {
 290                 ctdb->recovery_lock = ctdb_config.recovery_lock;
 291         } else {
 292                 D_WARNING("Cluster lock not set\n");
 293         }
 294
 295         /* tell ctdb what address to listen on */
 296         if (ctdb_config.node_address) {
 297                 ret = ctdb_set_address(ctdb, ctdb_config.node_address);
 298                 if (ret == -1) {
 299                         D_ERR("ctdb_set_address failed - %s\n",
 300                               ctdb_errstr(ctdb));
 301                         goto fail;
 302                 }
 303         }
 304
 305         /* tell ctdb what nodes are available */
 306         ctdb->nodes_file = talloc_asprintf(ctdb, "%s/nodes", ctdb_base);
 307         if (ctdb->nodes_file == NULL) {
 308                 DBG_ERR(" Out of memory\n");
 309                 goto fail;
 310         }
 311         ctdb_load_nodes_file(ctdb);
 312
 313         /*
 314          * Database setup/options
 315          */
 316
 317         ctdb->db_directory = ctdb_config.dbdir_volatile;
 318         ok = directory_exist(ctdb->db_directory);
 319         if (! ok) {
 320                 D_ERR("Volatile database directory %s does not exist\n",
 321                       ctdb->db_directory);
 322                 goto fail;
 323         }
 324
 325         ctdb->db_directory_persistent = ctdb_config.dbdir_persistent;
 326         ok = directory_exist(ctdb->db_directory_persistent);
 327         if (! ok) {
 328                 D_ERR("Persistent database directory %s does not exist\n",
 329                       ctdb->db_directory_persistent);
 330                 goto fail;
 331         }
 332
 333         ctdb->db_directory_state = ctdb_config.dbdir_state;
 334         ok = directory_exist(ctdb->db_directory_state);
 335         if (! ok) {
 336                 D_ERR("State database directory %s does not exist\n",
 337                       ctdb->db_directory_state);
 338                 goto fail;
 339         }
 340
 341         if (ctdb_config.lock_debug_script != NULL) {
 342                 ret = setenv("CTDB_DEBUG_LOCKS",
 343                              ctdb_config.lock_debug_script,
 344                              1);
 345                 if (ret != 0) {
 346                         D_ERR("Failed to set up lock debugging (%s)\n",
 347                               strerror(errno));
 348                         goto fail;
 349                 }
 350         }
 351
 352         /*
 353          * Legacy setup/options
 354          */
 355
 356         ctdb->start_as_disabled = (int)ctdb_config.start_as_disabled;
 357         ctdb->start_as_stopped  = (int)ctdb_config.start_as_stopped;
 358
 359         /* set ctdbd capabilities */
 360         if (!ctdb_config.lmaster_capability) {
 361                 ctdb->capabilities &= ~CTDB_CAP_LMASTER;
 362         }
 363         if (!ctdb_config.leader_capability) {
 364                 ctdb->capabilities &= ~CTDB_CAP_RECMASTER;
 365         }
 366
 367         ctdb->do_setsched = ctdb_config.realtime_scheduling;
 368
 369         /*
 370          * Miscellaneous setup
 371          */
 372
 373         ctdb_tunables_load(ctdb);
 374
 375         ctdb->event_script_dir = talloc_asprintf(ctdb,
 376                                                  "%s/events/legacy",
 377                                                  ctdb_base);
 378         if (ctdb->event_script_dir == NULL) {
 379                 DBG_ERR("Out of memory\n");
 380                 goto fail;
 381         }
 382
 383         ctdb->notification_script = talloc_asprintf(ctdb,
 384                                                     "%s/notify.sh",
 385                                                     ctdb_base);
 386         if (ctdb->notification_script == NULL) {
 387                 D_ERR("Unable to set notification script\n");
 388                 goto fail;
 389         }
 390
 391         /*
 392          * Testing and debug options
 393          */
 394
 395         if (test_mode != NULL) {
 396                 ctdb->do_setsched = false;
 397                 ctdb->do_checkpublicip = false;
 398                 fast_start = true;
 399         }
 400
 401         /* start the protocol running (as a child) */
 402         return ctdb_start_daemon(ctdb, interactive, test_mode != NULL);
 403
 404 fail:
 405         talloc_free(ctdb);
 406         exit(1);
 407 }