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 #include "common/logging_conf.h"
  44
  45 #include "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         ctdb->recovery_master  = (uint32_t)-1;
 125
 126         ctdb->upcalls = &ctdb_upcalls;
 127
 128         ctdb->statistics.statistics_start_time = timeval_current();
 129
 130         ctdb->capabilities = CTDB_CAP_DEFAULT;
 131
 132         /*
 133          * Initialise this node's PNN to the unknown value.  This will
 134          * be set to the correct value by either ctdb_add_node() as
 135          * part of loading the nodes file or by
 136          * ctdb_tcp_listen_automatic() when the transport is
 137          * initialised.  At some point we should de-optimise this and
 138          * pull it out into ctdb_start_daemon() so it is done clearly
 139          * and only in one place.
 140          */
 141         ctdb->pnn = CTDB_UNKNOWN_PNN;
 142
 143         ctdb->do_checkpublicip = true;
 144
 145         return ctdb;
 146 }
 147
 148
 149 /*
 150   main program
 151 */
 152 int main(int argc, const char *argv[])
 153 {
 154         struct ctdb_context *ctdb = NULL;
 155         int interactive_opt = 0;
 156         bool interactive = false;
 157
 158         struct poptOption popt_options[] = {
 159                 POPT_AUTOHELP
 160                 { "interactive", 'i', POPT_ARG_NONE, &interactive_opt, 0,
 161                   "don't fork, log to stderr", NULL },
 162                 POPT_TABLEEND
 163         };
 164         int opt, ret;
 165         const char **extra_argv;
 166         poptContext pc;
 167         struct tevent_context *ev;
 168         const char *ctdb_base;
 169         struct conf_context *conf;
 170         const char *logging_location;
 171         const char *test_mode;
 172         bool ok;
 173
 174         /*
 175          * Basic setup
 176          */
 177
 178         talloc_enable_null_tracking();
 179
 180         fault_setup();
 181
 182         ev = tevent_context_init(NULL);
 183         if (ev == NULL) {
 184                 fprintf(stderr, "tevent_context_init() failed\n");
 185                 exit(1);
 186         }
 187         tevent_loop_allow_nesting(ev);
 188
 189         ctdb = ctdb_init(ev);
 190         if (ctdb == NULL) {
 191                 fprintf(stderr, "Failed to init ctdb\n");
 192                 exit(1);
 193         }
 194
 195         /* Default value for CTDB_BASE - don't override */
 196         setenv("CTDB_BASE", CTDB_ETCDIR, 0);
 197         ctdb_base = getenv("CTDB_BASE");
 198         if (ctdb_base == NULL) {
 199                 D_ERR("CTDB_BASE not set\n");
 200                 exit(1);
 201         }
 202
 203         /*
 204          * Command-line option handling
 205          */
 206
 207         pc = poptGetContext(argv[0], argc, argv, popt_options, POPT_CONTEXT_KEEP_FIRST);
 208
 209         while ((opt = poptGetNextOpt(pc)) != -1) {
 210                 switch (opt) {
 211                 default:
 212                         fprintf(stderr, "Invalid option %s: %s\n",
 213                                 poptBadOption(pc, 0), poptStrerror(opt));
 214                         goto fail;
 215                 }
 216         }
 217
 218         /* If there are extra arguments then exit with usage message */
 219         extra_argv = poptGetArgs(pc);
 220         if (extra_argv) {
 221                 extra_argv++;
 222                 if (extra_argv[0])  {
 223                         poptPrintHelp(pc, stdout, 0);
 224                         goto fail;
 225                 }
 226         }
 227
 228         interactive = (interactive_opt != 0);
 229
 230         /*
 231          * Configuration file handling
 232          */
 233
 234         ret = ctdbd_config_load(ctdb, &conf);
 235         if (ret != 0) {
 236                 /* ctdbd_config_load() logs the failure */
 237                 goto fail;
 238         }
 239
 240         /*
 241          * Logging setup/options
 242          */
 243
 244         test_mode = getenv("CTDB_TEST_MODE");
 245
 246         /* Log to stderr (ignoring configuration) when running as interactive */
 247         if (interactive) {
 248                 logging_location = "file:";
 249                 setenv("CTDB_INTERACTIVE", "true", 1);
 250         } else {
 251                 logging_location = logging_conf_location(conf);
 252         }
 253
 254         if (strcmp(logging_location, "syslog") != 0 && test_mode == NULL) {
 255                 /* This can help when CTDB logging is misconfigured */
 256                 syslog(LOG_DAEMON|LOG_NOTICE,
 257                        "CTDB logging to location %s",
 258                        logging_location);
 259         }
 260
 261         /* Initialize logging and set the debug level */
 262         ok = ctdb_logging_init(ctdb,
 263                                logging_location,
 264                                logging_conf_log_level(conf));
 265         if (!ok) {
 266                 goto fail;
 267         }
 268         setenv("CTDB_LOGGING", logging_location, 1);
 269         setenv("CTDB_DEBUGLEVEL", debug_level_to_string(DEBUGLEVEL), 1);
 270
 271         script_log_level = debug_level_from_string(
 272                                         ctdb_config.script_log_level);
 273
 274         D_NOTICE("CTDB starting on node\n");
 275
 276         /*
 277          * Cluster setup/options
 278          */
 279
 280         ret = ctdb_set_transport(ctdb, ctdb_config.transport);
 281         if (ret == -1) {
 282                 D_ERR("ctdb_set_transport failed - %s\n", ctdb_errstr(ctdb));
 283                 goto fail;
 284         }
 285
 286         if (ctdb_config.recovery_lock == NULL) {
 287                 D_WARNING("Recovery lock not set\n");
 288         }
 289         ctdb->recovery_lock = ctdb_config.recovery_lock;
 290
 291         /* tell ctdb what address to listen on */
 292         if (ctdb_config.node_address) {
 293                 ret = ctdb_set_address(ctdb, ctdb_config.node_address);
 294                 if (ret == -1) {
 295                         D_ERR("ctdb_set_address failed - %s\n",
 296                               ctdb_errstr(ctdb));
 297                         goto fail;
 298                 }
 299         }
 300
 301         /* tell ctdb what nodes are available */
 302         ctdb->nodes_file = talloc_asprintf(ctdb, "%s/nodes", ctdb_base);
 303         if (ctdb->nodes_file == NULL) {
 304                 DBG_ERR(" Out of memory\n");
 305                 goto fail;
 306         }
 307         ctdb_load_nodes_file(ctdb);
 308
 309         /*
 310          * Database setup/options
 311          */
 312
 313         ctdb->db_directory = ctdb_config.dbdir_volatile;
 314         ok = directory_exist(ctdb->db_directory);
 315         if (! ok) {
 316                 D_ERR("Volatile database directory %s does not exist\n",
 317                       ctdb->db_directory);
 318                 goto fail;
 319         }
 320
 321         ctdb->db_directory_persistent = ctdb_config.dbdir_persistent;
 322         ok = directory_exist(ctdb->db_directory_persistent);
 323         if (! ok) {
 324                 D_ERR("Persistent database directory %s does not exist\n",
 325                       ctdb->db_directory_persistent);
 326                 goto fail;
 327         }
 328
 329         ctdb->db_directory_state = ctdb_config.dbdir_state;
 330         ok = directory_exist(ctdb->db_directory_state);
 331         if (! ok) {
 332                 D_ERR("State database directory %s does not exist\n",
 333                       ctdb->db_directory_state);
 334                 goto fail;
 335         }
 336
 337         if (ctdb_config.lock_debug_script != NULL) {
 338                 ret = setenv("CTDB_DEBUG_LOCKS",
 339                              ctdb_config.lock_debug_script,
 340                              1);
 341                 if (ret != 0) {
 342                         D_ERR("Failed to set up lock debugging (%s)\n",
 343                               strerror(errno));
 344                         goto fail;
 345                 }
 346         }
 347
 348         /*
 349          * Legacy setup/options
 350          */
 351
 352         ctdb->start_as_disabled = (int)ctdb_config.start_as_disabled;
 353         ctdb->start_as_stopped  = (int)ctdb_config.start_as_stopped;
 354
 355         /* set ctdbd capabilities */
 356         if (!ctdb_config.lmaster_capability) {
 357                 ctdb->capabilities &= ~CTDB_CAP_LMASTER;
 358         }
 359         if (!ctdb_config.recmaster_capability) {
 360                 ctdb->capabilities &= ~CTDB_CAP_RECMASTER;
 361         }
 362
 363         ctdb->do_setsched = ctdb_config.realtime_scheduling;
 364
 365         /*
 366          * Miscellaneous setup
 367          */
 368
 369         ctdb_tunables_set_defaults(ctdb);
 370
 371         ctdb->event_script_dir = talloc_asprintf(ctdb,
 372                                                  "%s/events/legacy",
 373                                                  ctdb_base);
 374         if (ctdb->event_script_dir == NULL) {
 375                 DBG_ERR("Out of memory\n");
 376                 goto fail;
 377         }
 378
 379         ctdb->notification_script = talloc_asprintf(ctdb,
 380                                                     "%s/notify.sh",
 381                                                     ctdb_base);
 382         if (ctdb->notification_script == NULL) {
 383                 D_ERR("Unable to set notification script\n");
 384                 goto fail;
 385         }
 386
 387         /*
 388          * Testing and debug options
 389          */
 390
 391         if (test_mode != NULL) {
 392                 ctdb->do_setsched = false;
 393                 ctdb->do_checkpublicip = false;
 394                 fast_start = true;
 395         }
 396
 397         /* Don't fork when running in test mode */
 398         interactive = interactive || test_mode != NULL;
 399
 400         /* start the protocol running (as a child) */
 401         return ctdb_start_daemon(ctdb, !interactive);
 402
 403 fail:
 404         talloc_free(ctdb);
 405         exit(1);
 406 }