diff --git a/src/sbd-cluster.c b/src/sbd-cluster.c index b6c5512..31fd5da 100644 --- a/src/sbd-cluster.c +++ b/src/sbd-cluster.c @@ -1,770 +1,801 @@ /* * 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 program; if not, write to the Free Software Foundation, Inc., * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. */ #include #include #include #include #include #include #include #include #include #include #include #if CHECK_TWO_NODE || CHECK_QDEVICE_SYNC_TIMEOUT #include +// available since glib 2.58 +#ifndef G_SOURCE_FUNC +#define G_SOURCE_FUNC(f) ((GSourceFunc) (void (*)(void)) (f)) +#endif +// available since glib 2.32 +#ifndef G_SOURCE_REMOVE +#define G_SOURCE_REMOVE FALSE +#endif +// available since glib 2.32 +#ifndef G_SOURCE_CONTINUE +#define G_SOURCE_CONTINUE TRUE +#endif #endif #include "sbd.h" //undef SUPPORT_PLUGIN //define SUPPORT_PLUGIN 1 /* binary for pacemaker-remote has changed with pacemaker 2 */ #ifdef CRM_SCORE_INFINITY #define PACEMAKER_REMOTE_BINARY "pacemaker-remoted" #else #define PACEMAKER_REMOTE_BINARY "pacemaker_remoted" #endif static bool remote_node = false; static pid_t remoted_pid = 0; static int reconnect_msec = 1000; static GMainLoop *mainloop = NULL; static guint notify_timer = 0; static crm_cluster_t cluster; +static void clean_up(int rc); static gboolean sbd_remote_check(gpointer user_data); static long unsigned int find_pacemaker_remote(void); static void sbd_membership_destroy(gpointer user_data); #if SUPPORT_PLUGIN static void sbd_plugin_membership_dispatch(cpg_handle_t handle, const struct cpg_name *groupName, uint32_t nodeid, uint32_t pid, void *msg, size_t msg_len) { if(msg_len > 0) { set_servant_health(pcmk_health_online, LOG_INFO, "Connected to %s", name_for_cluster_type(get_cluster_type())); } else { set_servant_health(pcmk_health_unclean, LOG_WARNING, "Broken %s message", name_for_cluster_type(get_cluster_type())); } notify_parent(); return; } #endif #if SUPPORT_COROSYNC #if CHECK_VOTEQUORUM_HANDLE #include static votequorum_handle_t votequorum_handle = 0; #endif #if CHECK_TWO_NODE static bool two_node = false; #endif static bool ever_seen_both = false; static int cpg_membership_entries = -1; #if CHECK_QDEVICE_SYNC_TIMEOUT #include static bool using_qdevice = false; static uint32_t qdevice_sync_timeout = /* in seconds */ VOTEQUORUM_QDEVICE_DEFAULT_SYNC_TIMEOUT / 1000; #endif #if CHECK_TWO_NODE || CHECK_QDEVICE_SYNC_TIMEOUT #include static cmap_handle_t cmap_handle = 0; static cmap_track_handle_t track_handle = 0; static GSource *cmap_source = NULL; #endif void sbd_cpg_membership_health_update() { if(cpg_membership_entries > 0) { #if CHECK_TWO_NODE bool quorum_is_suspect_two_node = (two_node && ever_seen_both && cpg_membership_entries == 1); #endif #if CHECK_QDEVICE_SYNC_TIMEOUT bool quorum_is_suspect_qdevice_timing = using_qdevice && (qdevice_sync_timeout > timeout_watchdog); #endif do { #if CHECK_TWO_NODE if (quorum_is_suspect_two_node) { /* Alternative would be asking votequorum for number of votes. * Using pacemaker's cpg as source for number of active nodes * avoids binding to an additional library, is definitely * less code to write and we wouldn't have to combine data * from 3 sources (cmap, cpg & votequorum) in a potentially * racy environment. */ set_servant_health(pcmk_health_noquorum, LOG_WARNING, "Connected to %s but requires both nodes present", name_for_cluster_type(get_cluster_type()) ); break; } #endif #if CHECK_QDEVICE_SYNC_TIMEOUT if (quorum_is_suspect_qdevice_timing) { /* We can't really trust quorum info as qdevice-sync_timeout * makes reaction of quorum too sluggish for our * watchdog-timeout. */ set_servant_health(pcmk_health_noquorum, LOG_WARNING, "Connected to %s but quorum using qdevice is distrusted " "for SBD as qdevice-sync_timeout (%ds) > watchdog-timeout " "(%lus).", name_for_cluster_type(get_cluster_type()), qdevice_sync_timeout, timeout_watchdog ); break; } #endif set_servant_health(pcmk_health_online, LOG_INFO, "Connected to %s (%u members)%s", name_for_cluster_type(get_cluster_type()), cpg_membership_entries, #if CHECK_QDEVICE_SYNC_TIMEOUT using_qdevice?" using qdevice for quorum":"" #else "" #endif ); } while (false); if (cpg_membership_entries > 1) { ever_seen_both = true; } } else { set_servant_health(pcmk_health_unclean, LOG_WARNING, "Empty %s membership", name_for_cluster_type(get_cluster_type())); } } void sbd_cpg_membership_dispatch(cpg_handle_t handle, const struct cpg_name *groupName, const struct cpg_address *member_list, size_t member_list_entries, const struct cpg_address *left_list, size_t left_list_entries, const struct cpg_address *joined_list, size_t joined_list_entries) { cpg_membership_entries = member_list_entries; sbd_cpg_membership_health_update(); notify_parent(); } #if CHECK_TWO_NODE || CHECK_QDEVICE_SYNC_TIMEOUT static void sbd_cmap_notify_fn( cmap_handle_t cmap_handle, cmap_track_handle_t cmap_track_handle, int32_t event, const char *key_name, struct cmap_notify_value new_val, struct cmap_notify_value old_val, void *user_data) { switch (event) { case CMAP_TRACK_ADD: case CMAP_TRACK_MODIFY: switch (new_val.type) { case CMAP_VALUETYPE_UINT8: #if CHECK_TWO_NODE if (!strcmp(key_name, "quorum.two_node")) { two_node = *((uint8_t *) new_val.data); } else { return; } break; #else return; #endif case CMAP_VALUETYPE_STRING: #if CHECK_QDEVICE_SYNC_TIMEOUT if (!strcmp(key_name, "quorum.device.model")) { using_qdevice = ((new_val.data) && strlen((char *) new_val.data)); } else { return; } break; #else return; #endif case CMAP_VALUETYPE_UINT32: #if CHECK_QDEVICE_SYNC_TIMEOUT if (!strcmp(key_name, "quorum.device.sync_timeout")) { if (new_val.data) { qdevice_sync_timeout = *((uint32_t *) new_val.data) / 1000; } else { qdevice_sync_timeout = VOTEQUORUM_QDEVICE_DEFAULT_SYNC_TIMEOUT / 1000; } } else { return; } break; #else return; #endif default: return; } break; case CMAP_TRACK_DELETE: switch (new_val.type) { case CMAP_VALUETYPE_UINT8: #if CHECK_TWO_NODE if (!strcmp(key_name, "quorum.two_node")) { two_node = false; } else { return; } break; #else return; #endif case CMAP_VALUETYPE_STRING: #if CHECK_QDEVICE_SYNC_TIMEOUT if (!strcmp(key_name, "quorum.device.model")) { using_qdevice = false; } else { return; } break; #else return; #endif case CMAP_VALUETYPE_UINT32: #if CHECK_QDEVICE_SYNC_TIMEOUT if (!strcmp(key_name, "quorum.device.sync_timeout")) { qdevice_sync_timeout = VOTEQUORUM_QDEVICE_DEFAULT_SYNC_TIMEOUT / 1000; } else { return; } break; #else return; #endif default: return; } break; default: return; } sbd_cpg_membership_health_update(); notify_parent(); } static gboolean -cmap_dispatch_callback (gpointer user_data) +cmap_dispatch_callback (gint cmap_fd, + GIOCondition condition, + gpointer user_data) { + /* CMAP connection lost */ + if (condition & G_IO_HUP) { + cl_log(LOG_WARNING, "CMAP service connection lost\n"); + clean_up(EXIT_CLUSTER_DISCONNECT); + /* remove the source from the main loop */ + return G_SOURCE_REMOVE; /* never reached */ + } cmap_dispatch(cmap_handle, CS_DISPATCH_ALL); - return TRUE; + return G_SOURCE_CONTINUE; } static void cmap_destroy(void) { if (cmap_source) { g_source_destroy(cmap_source); cmap_source = NULL; } if (track_handle) { cmap_track_delete(cmap_handle, track_handle); track_handle = 0; } if (cmap_handle) { cmap_finalize(cmap_handle); cmap_handle = 0; } } static gboolean verify_against_cmap_config(void) { #if CHECK_TWO_NODE uint8_t two_node_u8 = 0; #endif #if CHECK_QDEVICE_SYNC_TIMEOUT char *qdevice_model = NULL; #endif int cmap_fd; if (!track_handle) { if (cmap_initialize(&cmap_handle) != CS_OK) { cl_log(LOG_WARNING, "Cannot initialize CMAP service\n"); goto out; } #if CHECK_TWO_NODE if (cmap_track_add(cmap_handle, "quorum.two_node", CMAP_TRACK_DELETE|CMAP_TRACK_MODIFY|CMAP_TRACK_ADD, sbd_cmap_notify_fn, NULL, &track_handle) != CS_OK) { cl_log(LOG_WARNING, "Failed adding CMAP tracker for 2Node-mode\n"); goto out; } #endif #if CHECK_QDEVICE_SYNC_TIMEOUT if (cmap_track_add(cmap_handle, "quorum.device.model", CMAP_TRACK_DELETE|CMAP_TRACK_MODIFY|CMAP_TRACK_ADD, sbd_cmap_notify_fn, NULL, &track_handle) != CS_OK) { cl_log(LOG_WARNING, "Failed adding CMAP tracker for qdevice-model\n"); goto out; } if (cmap_track_add(cmap_handle, "quorum.device.sync_timeout", CMAP_TRACK_DELETE|CMAP_TRACK_MODIFY|CMAP_TRACK_ADD, sbd_cmap_notify_fn, NULL, &track_handle) != CS_OK) { cl_log(LOG_WARNING, "Failed adding CMAP tracker for qdevice-sync_timeout\n"); goto out; } #endif /* add the tracker to mainloop */ if (cmap_fd_get(cmap_handle, &cmap_fd) != CS_OK) { cl_log(LOG_WARNING, "Failed to get a file handle for cmap\n"); goto out; } if (!(cmap_source = g_unix_fd_source_new (cmap_fd, G_IO_IN))) { cl_log(LOG_WARNING, "Couldn't create source for cmap\n"); goto out; } - g_source_set_callback(cmap_source, cmap_dispatch_callback, NULL, NULL); + g_source_set_callback(cmap_source, G_SOURCE_FUNC(cmap_dispatch_callback), NULL, NULL); g_source_attach(cmap_source, NULL); } #if CHECK_TWO_NODE if (cmap_get_uint8(cmap_handle, "quorum.two_node", &two_node_u8) == CS_OK) { cl_log(two_node_u8? LOG_NOTICE : LOG_INFO, "Corosync is%s in 2Node-mode", two_node_u8?"":" not"); two_node = two_node_u8; } else { cl_log(LOG_INFO, "quorum.two_node not present in cmap\n"); } #endif #if CHECK_QDEVICE_SYNC_TIMEOUT if (cmap_get_string(cmap_handle, "quorum.device.model", &qdevice_model) == CS_OK) { using_qdevice = qdevice_model && strlen(qdevice_model); cl_log(using_qdevice? LOG_NOTICE : LOG_INFO, "Corosync is%s using qdevice", using_qdevice?"":" not"); } else { cl_log(LOG_INFO, "quorum.device.model not present in cmap\n"); } if (cmap_get_uint32(cmap_handle, "quorum.device.sync_timeout", &qdevice_sync_timeout) == CS_OK) { qdevice_sync_timeout /= 1000; cl_log(LOG_INFO, "Corosync is using qdevice-sync_timeout=%ds", qdevice_sync_timeout); } else { cl_log(LOG_INFO, "quorum.device.sync_timeout not present in cmap\n"); } #endif return TRUE; out: cmap_destroy(); return FALSE; } #endif #endif static gboolean notify_timer_cb(gpointer data) { cl_log(LOG_DEBUG, "Refreshing %sstate", remote_node?"remote ":""); if(remote_node) { sbd_remote_check(NULL); return TRUE; } switch (get_cluster_type()) { #if HAVE_DECL_PCMK_CLUSTER_CLASSIC_AIS case pcmk_cluster_classic_ais: send_cluster_text(crm_class_quorum, NULL, TRUE, NULL, crm_msg_ais); break; #endif case pcmk_cluster_corosync: do { #if SUPPORT_COROSYNC && CHECK_VOTEQUORUM_HANDLE struct votequorum_info info; if (votequorum_getinfo(votequorum_handle, 0, &info) != CS_OK) { votequorum_finalize(votequorum_handle); if (votequorum_initialize(&votequorum_handle, NULL) != CS_OK) { votequorum_handle = 0; break; } if (votequorum_getinfo(votequorum_handle, 0, &info) != CS_OK) { break; } } #endif notify_parent(); } while (0); break; #if HAVE_DECL_PCMK_CLUSTER_CMAN case pcmk_cluster_cman: notify_parent(); break; #endif default: break; } return TRUE; } static void sbd_membership_connect(void) { bool connected = false; cl_log(LOG_INFO, "Attempting cluster connection"); cluster.destroy = sbd_membership_destroy; #if SUPPORT_PLUGIN cluster.cpg.cpg_deliver_fn = sbd_plugin_membership_dispatch; #endif #if SUPPORT_COROSYNC cluster.cpg.cpg_confchg_fn = sbd_cpg_membership_dispatch; #endif while(connected == false) { enum cluster_type_e stack = get_cluster_type(); if(get_cluster_type() == pcmk_cluster_unknown) { crm_debug("Attempting pacemaker remote connection"); /* Nothing is up, go looking for the pacemaker remote process */ if(find_pacemaker_remote() > 0) { connected = true; } } else { cl_log(LOG_INFO, "Attempting connection to %s", name_for_cluster_type(stack)); #if SUPPORT_COROSYNC && (CHECK_TWO_NODE || CHECK_QDEVICE_SYNC_TIMEOUT) if (verify_against_cmap_config()) { #endif if(crm_cluster_connect(&cluster)) { connected = true; } #if SUPPORT_COROSYNC && (CHECK_TWO_NODE || CHECK_QDEVICE_SYNC_TIMEOUT) } #endif } if(connected == false) { cl_log(LOG_INFO, "Failed, retrying in %ds", reconnect_msec / 1000); sleep(reconnect_msec / 1000); } } set_servant_health(pcmk_health_transient, LOG_INFO, "Connected, waiting for initial membership"); notify_parent(); notify_timer_cb(NULL); } static void sbd_membership_destroy(gpointer user_data) { cl_log(LOG_WARNING, "Lost connection to %s", name_for_cluster_type(get_cluster_type())); if (get_cluster_type() != pcmk_cluster_unknown) { #if SUPPORT_COROSYNC && (CHECK_TWO_NODE || CHECK_QDEVICE_SYNC_TIMEOUT) cmap_destroy(); #endif } set_servant_health(pcmk_health_unclean, LOG_ERR, "Cluster connection terminated"); notify_parent(); /* Attempt to reconnect, the watchdog will take the node down if the problem isn't transient */ sbd_membership_connect(); } /* * \internal * \brief Get process ID and name associated with a /proc directory entry * * \param[in] entry Directory entry (must be result of readdir() on /proc) * \param[out] name If not NULL, a char[16] to hold the process name * \param[out] pid If not NULL, will be set to process ID of entry * * \return 0 on success, -1 if entry is not for a process or info not found * * \note This should be called only on Linux systems, as not all systems that * support /proc store process names and IDs in the same way. * Copied from the Pacemaker implementation. */ int sbd_procfs_process_info(struct dirent *entry, char *name, int *pid) { int fd, local_pid; FILE *file; struct stat statbuf; char procpath[128] = { 0 }; /* We're only interested in entries whose name is a PID, * so skip anything non-numeric or that is too long. * * 114 = 128 - strlen("/proc/") - strlen("/status") - 1 */ local_pid = atoi(entry->d_name); if ((local_pid <= 0) || (strlen(entry->d_name) > 114)) { return -1; } if (pid) { *pid = local_pid; } /* Get this entry's file information */ strcpy(procpath, "/proc/"); strcat(procpath, entry->d_name); fd = open(procpath, O_RDONLY); if (fd < 0 ) { return -1; } if (fstat(fd, &statbuf) < 0) { close(fd); return -1; } close(fd); /* We're only interested in subdirectories */ if (!S_ISDIR(statbuf.st_mode)) { return -1; } /* Read the first entry ("Name:") from the process's status file. * We could handle the valgrind case if we parsed the cmdline file * instead, but that's more of a pain than it's worth. */ if (name != NULL) { strcat(procpath, "/status"); file = fopen(procpath, "r"); if (!file) { return -1; } if (fscanf(file, "Name:\t%15[a-zA-Z0-9 _-]", name) != 1) { fclose(file); return -1; } fclose(file); } return 0; } static gboolean sbd_remote_check(gpointer user_data) { static int have_proc_pid = 0; int running = 0; cl_log(LOG_DEBUG, "Checking pacemaker remote connection: %d/%d", have_proc_pid, remoted_pid); if(have_proc_pid == 0) { char proc_path[PATH_MAX], exe_path[PATH_MAX]; /* check to make sure pid hasn't been reused by another process */ snprintf(proc_path, sizeof(proc_path), "/proc/%lu/exe", (long unsigned int)getpid()); have_proc_pid = 1; if(readlink(proc_path, exe_path, PATH_MAX - 1) < 0) { have_proc_pid = -1; } } if (remoted_pid <= 0) { set_servant_health(pcmk_health_transient, LOG_WARNING, "No Pacemaker Remote connection"); goto notify; } else if (kill(remoted_pid, 0) < 0 && errno == ESRCH) { /* Not running */ } else if(have_proc_pid == -1) { running = 1; cl_log(LOG_DEBUG, "Poccess %ld is active", (long)remoted_pid); } else { int rc = 0; char proc_path[PATH_MAX], exe_path[PATH_MAX]; /* check to make sure pid hasn't been reused by another process */ snprintf(proc_path, sizeof(proc_path), "/proc/%lu/exe", (long unsigned int)remoted_pid); rc = readlink(proc_path, exe_path, PATH_MAX - 1); if (rc < 0) { crm_perror(LOG_ERR, "Could not read from %s", proc_path); goto done; } exe_path[rc] = 0; if (strcmp(exe_path, SBINDIR "/" PACEMAKER_REMOTE_BINARY) == 0) { cl_log(LOG_DEBUG, "Process %s (%ld) is active", exe_path, (long)remoted_pid); running = 1; } } done: if(running) { set_servant_health(pcmk_health_online, LOG_INFO, "Connected to Pacemaker Remote %lu", (long unsigned int)remoted_pid); } else { set_servant_health(pcmk_health_unclean, LOG_WARNING, "Connection to Pacemaker Remote %lu lost", (long unsigned int)remoted_pid); } notify: notify_parent(); if(running == 0) { sbd_membership_connect(); } return true; } static long unsigned int find_pacemaker_remote(void) { DIR *dp; char entry_name[16]; struct dirent *entry; dp = opendir("/proc"); if (!dp) { /* no proc directory to search through */ cl_log(LOG_NOTICE, "Can not read /proc directory to track existing components"); return FALSE; } while ((entry = readdir(dp)) != NULL) { int pid; if (sbd_procfs_process_info(entry, entry_name, &pid) < 0) { continue; } /* entry_name is truncated to 16 characters including the nul terminator */ cl_log(LOG_DEBUG, "Found %s at %u", entry_name, pid); if (strncmp(entry_name, PACEMAKER_REMOTE_BINARY, 15) == 0) { cl_log(LOG_NOTICE, "Found Pacemaker Remote at PID %u", pid); remoted_pid = pid; remote_node = true; break; } } closedir(dp); return remoted_pid; } static void clean_up(int rc) { #if CHECK_VOTEQUORUM_HANDLE votequorum_finalize(votequorum_handle); votequorum_handle = 0; /* there isn't really an invalid handle value * just to be back where we started */ #endif + +#if SUPPORT_COROSYNC && CHECK_TWO_NODE + cmap_destroy(); +#endif + + if (rc >= 0) { + exit(rc); + } + return; } static void cluster_shutdown(int nsig) { clean_up(0); } int servant_cluster(const char *diskname, int mode, const void* argp) { enum cluster_type_e cluster_stack = get_cluster_type(); crm_system_name = strdup("sbd:cluster"); cl_log(LOG_NOTICE, "Monitoring %s cluster health", name_for_cluster_type(cluster_stack)); set_proc_title("sbd: watcher: Cluster"); sbd_membership_connect(); /* stonith_our_uname = cluster.uname; */ /* stonith_our_uuid = cluster.uuid; */ mainloop = g_main_loop_new(NULL, FALSE); notify_timer = g_timeout_add(timeout_loop * 1000, notify_timer_cb, NULL); mainloop_add_signal(SIGTERM, cluster_shutdown); mainloop_add_signal(SIGINT, cluster_shutdown); g_main_loop_run(mainloop); g_main_loop_unref(mainloop); clean_up(0); return 0; /* never reached */ } diff --git a/src/sbd-inquisitor.c b/src/sbd-inquisitor.c index 4fec2fd..5f8d5d0 100644 --- a/src/sbd-inquisitor.c +++ b/src/sbd-inquisitor.c @@ -1,1334 +1,1348 @@ /* * Copyright (C) 2013 Lars Marowsky-Bree * * 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 program; if not, write to the Free Software Foundation, Inc., * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. */ #include #include "sbd.h" #define LOCKSTRLEN 11 static struct servants_list_item *servants_leader = NULL; int disk_priority = 1; int check_pcmk = 1; int check_cluster = 1; int disk_count = 0; int servant_count = 0; int servant_restart_interval = 5; int servant_restart_count = 1; int start_mode = 0; char* pidfile = NULL; bool do_flush = true; char timeout_sysrq_char = 'b'; bool move_to_root_cgroup = true; bool enforce_moving_to_root_cgroup = false; bool sync_resource_startup = false; int parse_device_line(const char *line); static const char * get_env_option(const char *option) { const char *value = getenv(option); size_t max = 0; size_t lpc = 0; if (value == NULL) { return NULL; } max = strlen(value); for (lpc = 0; lpc < max; lpc++) { if (!isspace(value[lpc])) { break; } } return (strlen(value + lpc) > 0 ? (value + lpc) : NULL); } static int recruit_servant(const char *devname, pid_t pid) { struct servants_list_item *s = servants_leader; struct servants_list_item *newbie; if (lookup_servant_by_dev(devname)) { cl_log(LOG_DEBUG, "Servant %s already exists", devname); return 0; } newbie = malloc(sizeof(*newbie)); if (newbie) { memset(newbie, 0, sizeof(*newbie)); newbie->devname = strdup(devname); newbie->pid = pid; newbie->first_start = 1; } if (!newbie || !newbie->devname) { fprintf(stderr, "heap allocation failed in recruit_servant.\n"); exit(1); } /* some sanity-check on our newbie */ if (sbd_is_disk(newbie)) { cl_log(LOG_INFO, "Monitoring %s", devname); disk_count++; } else if (sbd_is_pcmk(newbie) || sbd_is_cluster(newbie)) { /* alive just after pcmk and cluster servants have shown up */ newbie->outdated = 1; } else { /* toss our newbie */ cl_log(LOG_ERR, "Refusing to recruit unrecognized servant %s", devname); free((void *) newbie->devname); free(newbie); return -1; } if (!s) { servants_leader = newbie; } else { while (s->next) s = s->next; s->next = newbie; } servant_count++; return 0; } int assign_servant(const char* devname, functionp_t functionp, int mode, const void* argp) { pid_t pid = 0; int rc = 0; pid = fork(); if (pid == 0) { /* child */ maximize_priority(); sbd_set_format_string(QB_LOG_SYSLOG, devname); rc = (*functionp)(devname, mode, argp); if (rc == -1) exit(1); else exit(0); } else if (pid != -1) { /* parent */ return pid; } else { cl_log(LOG_ERR,"Failed to fork servant"); exit(1); } } struct servants_list_item *lookup_servant_by_dev(const char *devname) { struct servants_list_item *s; for (s = servants_leader; s; s = s->next) { if (strcasecmp(s->devname, devname) == 0) break; } return s; } struct servants_list_item *lookup_servant_by_pid(pid_t pid) { struct servants_list_item *s; for (s = servants_leader; s; s = s->next) { if (s->pid == pid) break; } return s; } int check_all_dead(void) { struct servants_list_item *s; int r = 0; union sigval svalue; for (s = servants_leader; s; s = s->next) { if (s->pid != 0) { r = sigqueue(s->pid, 0, svalue); if (r == -1 && errno == ESRCH) continue; return 0; } } return 1; } void servant_start(struct servants_list_item *s) { int r = 0; union sigval svalue; if (s->pid != 0) { r = sigqueue(s->pid, 0, svalue); if ((r != -1 || errno != ESRCH)) return; } s->restarts++; if (sbd_is_disk(s)) { #if SUPPORT_SHARED_DISK DBGLOG(LOG_INFO, "Starting servant for device %s", s->devname); s->pid = assign_servant(s->devname, servant_md, start_mode, s); #else cl_log(LOG_ERR, "Shared disk functionality not supported"); return; #endif } else if(sbd_is_pcmk(s)) { DBGLOG(LOG_INFO, "Starting Pacemaker servant"); s->pid = assign_servant(s->devname, servant_pcmk, start_mode, NULL); } else if(sbd_is_cluster(s)) { DBGLOG(LOG_INFO, "Starting Cluster servant"); s->pid = assign_servant(s->devname, servant_cluster, start_mode, NULL); } else { cl_log(LOG_ERR, "Unrecognized servant: %s", s->devname); } clock_gettime(CLOCK_MONOTONIC, &s->t_started); return; } void servants_start(void) { struct servants_list_item *s; for (s = servants_leader; s; s = s->next) { s->restarts = 0; servant_start(s); } } void servants_kill(void) { struct servants_list_item *s; union sigval svalue; for (s = servants_leader; s; s = s->next) { if (s->pid != 0) sigqueue(s->pid, SIGKILL, svalue); } } static inline void cleanup_servant_by_pid(pid_t pid) { struct servants_list_item* s; s = lookup_servant_by_pid(pid); if (s) { cl_log(LOG_WARNING, "Servant for %s (pid: %i) has terminated", s->devname, s->pid); s->pid = 0; } else { /* This most likely is a stray signal from somewhere, or * a SIGCHLD for a process that has previously * explicitly disconnected. */ DBGLOG(LOG_INFO, "cleanup_servant: Nothing known about pid %i", pid); } } int inquisitor_decouple(void) { pid_t ppid = getppid(); union sigval signal_value; /* During start-up, we only arm the watchdog once we've got * quorum at least once. */ if (watchdog_use) { if (watchdog_init() < 0) { return -1; } } if (ppid > 1) { sigqueue(ppid, SIG_LIVENESS, signal_value); } return 0; } static int sbd_lock_running(long pid) { int rc = 0; long mypid; int running = 0; char proc_path[PATH_MAX], exe_path[PATH_MAX], myexe_path[PATH_MAX]; /* check if pid is running */ if (kill(pid, 0) < 0 && errno == ESRCH) { goto bail; } #ifndef HAVE_PROC_PID return 1; #endif /* check to make sure pid hasn't been reused by another process */ snprintf(proc_path, sizeof(proc_path), "/proc/%lu/exe", pid); rc = readlink(proc_path, exe_path, PATH_MAX-1); if(rc < 0) { cl_perror("Could not read from %s", proc_path); goto bail; } exe_path[rc] = 0; mypid = (unsigned long) getpid(); snprintf(proc_path, sizeof(proc_path), "/proc/%lu/exe", mypid); rc = readlink(proc_path, myexe_path, PATH_MAX-1); if(rc < 0) { cl_perror("Could not read from %s", proc_path); goto bail; } myexe_path[rc] = 0; if(strcmp(exe_path, myexe_path) == 0) { running = 1; } bail: return running; } static int sbd_lock_pidfile(const char *filename) { char lf_name[256], tf_name[256], buf[LOCKSTRLEN+1]; int fd; long pid, mypid; int rc; struct stat sbuf; if (filename == NULL) { errno = EFAULT; return -1; } mypid = (unsigned long) getpid(); snprintf(lf_name, sizeof(lf_name), "%s",filename); snprintf(tf_name, sizeof(tf_name), "%s.%lu", filename, mypid); if ((fd = open(lf_name, O_RDONLY)) >= 0) { if (fstat(fd, &sbuf) >= 0 && sbuf.st_size < LOCKSTRLEN) { sleep(1); /* if someone was about to create one, * give'm a sec to do so * Though if they follow our protocol, * this won't happen. They should really * put the pid in, then link, not the * other way around. */ } if (read(fd, buf, sizeof(buf)) < 1) { /* lockfile empty -> rm it and go on */; } else { if (sscanf(buf, "%ld", &pid) < 1) { /* lockfile screwed up -> rm it and go on */ } else { if (pid > 1 && (getpid() != pid) && sbd_lock_running(pid)) { /* is locked by existing process * -> give up */ close(fd); return -1; } else { /* stale lockfile -> rm it and go on */ } } } unlink(lf_name); close(fd); } if ((fd = open(tf_name, O_CREAT | O_WRONLY | O_EXCL, 0644)) < 0) { /* Hmmh, why did we fail? Anyway, nothing we can do about it */ return -3; } /* Slight overkill with the %*d format ;-) */ snprintf(buf, sizeof(buf), "%*lu\n", LOCKSTRLEN-1, mypid); if (write(fd, buf, LOCKSTRLEN) != LOCKSTRLEN) { /* Again, nothing we can do about this */ rc = -3; close(fd); goto out; } close(fd); switch (link(tf_name, lf_name)) { case 0: if (stat(tf_name, &sbuf) < 0) { /* something weird happened */ rc = -3; break; } if (sbuf.st_nlink < 2) { /* somehow, it didn't get through - NFS trouble? */ rc = -2; break; } rc = 0; break; case EEXIST: rc = -1; break; default: rc = -3; } out: unlink(tf_name); return rc; } /* * Unlock a file (remove its lockfile) * do we need to check, if its (still) ours? No, IMHO, if someone else * locked our line, it's his fault -tho * returns 0 on success * <0 if some failure occured */ static int sbd_unlock_pidfile(const char *filename) { char lf_name[256]; if (filename == NULL) { errno = EFAULT; return -1; } snprintf(lf_name, sizeof(lf_name), "%s", filename); return unlink(lf_name); } int cluster_alive(bool all) { int alive = 1; struct servants_list_item* s; if(servant_count == disk_count) { return 0; } for (s = servants_leader; s; s = s->next) { if (sbd_is_cluster(s) || sbd_is_pcmk(s)) { if(s->outdated) { alive = 0; } else if(all == false) { return 1; } } } return alive; } int quorum_read(int good_servants) { if (disk_count > 2) return (good_servants > disk_count/2); else return (good_servants > 0); } void inquisitor_child(void) { int sig, pid; sigset_t procmask; siginfo_t sinfo; int status; struct timespec timeout; int exiting = 0; int decoupled = 0; int cluster_appeared = 0; int pcmk_override = 0; time_t latency; struct timespec t_last_tickle, t_now; struct servants_list_item* s; if (debug_mode) { cl_log(LOG_ERR, "DEBUG MODE %d IS ACTIVE - DO NOT RUN IN PRODUCTION!", debug_mode); } set_proc_title("sbd: inquisitor"); if (pidfile) { if (sbd_lock_pidfile(pidfile) < 0) { exit(1); } } sigemptyset(&procmask); sigaddset(&procmask, SIGCHLD); sigaddset(&procmask, SIGTERM); sigaddset(&procmask, SIG_LIVENESS); sigaddset(&procmask, SIG_EXITREQ); sigaddset(&procmask, SIG_TEST); sigaddset(&procmask, SIG_PCMK_UNHEALTHY); sigaddset(&procmask, SIG_RESTART); sigaddset(&procmask, SIGUSR1); sigaddset(&procmask, SIGUSR2); sigprocmask(SIG_BLOCK, &procmask, NULL); servants_start(); timeout.tv_sec = timeout_loop; timeout.tv_nsec = 0; clock_gettime(CLOCK_MONOTONIC, &t_last_tickle); while (1) { bool tickle = 0; bool can_detach = 0; int good_servants = 0; sig = sigtimedwait(&procmask, &sinfo, &timeout); clock_gettime(CLOCK_MONOTONIC, &t_now); if (sig == SIG_EXITREQ || sig == SIGTERM) { servants_kill(); watchdog_close(true); exiting = 1; } else if (sig == SIGCHLD) { while ((pid = waitpid(-1, &status, WNOHANG))) { if (pid == -1 && errno == ECHILD) { break; } else { s = lookup_servant_by_pid(pid); if (sbd_is_disk(s)) { if (WIFEXITED(status)) { switch(WEXITSTATUS(status)) { case EXIT_MD_SERVANT_IO_FAIL: DBGLOG(LOG_INFO, "Servant for %s requests to be disowned", s->devname); break; case EXIT_MD_SERVANT_REQUEST_RESET: cl_log(LOG_WARNING, "%s requested a reset", s->devname); do_reset(); break; case EXIT_MD_SERVANT_REQUEST_SHUTOFF: cl_log(LOG_WARNING, "%s requested a shutoff", s->devname); do_off(); break; case EXIT_MD_SERVANT_REQUEST_CRASHDUMP: cl_log(LOG_WARNING, "%s requested a crashdump", s->devname); do_crashdump(); break; default: break; } } } else if (sbd_is_pcmk(s)) { if (WIFEXITED(status)) { switch(WEXITSTATUS(status)) { case EXIT_PCMK_SERVANT_GRACEFUL_SHUTDOWN: DBGLOG(LOG_INFO, "PCMK-Servant has exited gracefully"); /* revert to state prior to pacemaker-detection */ s->restarts = 0; s->restart_blocked = 0; cluster_appeared = 0; s->outdated = 1; s->t_last.tv_sec = 0; break; default: break; } } + } else if (sbd_is_cluster(s)) { + if (WIFEXITED(status)) { + switch(WEXITSTATUS(status)) { + case EXIT_CLUSTER_DISCONNECT: + cl_log(LOG_WARNING, "Cluster-Servant has exited (connection lost)"); + s->restarts = 0; + s->restart_blocked = 0; + s->outdated = 1; + s->t_last.tv_sec = 0; + break; + default: + break; + } + } } cleanup_servant_by_pid(pid); } } } else if (sig == SIG_PCMK_UNHEALTHY) { s = lookup_servant_by_pid(sinfo.si_pid); if (sbd_is_cluster(s) || sbd_is_pcmk(s)) { if (s->outdated == 0) { cl_log(LOG_WARNING, "%s health check: UNHEALTHY", s->devname); } s->t_last.tv_sec = 1; } else { cl_log(LOG_WARNING, "Ignoring SIG_PCMK_UNHEALTHY from unknown source"); } } else if (sig == SIG_LIVENESS) { s = lookup_servant_by_pid(sinfo.si_pid); if (s) { s->first_start = 0; clock_gettime(CLOCK_MONOTONIC, &s->t_last); } } else if (sig == SIG_TEST) { } else if (sig == SIGUSR1) { if (exiting) continue; servants_start(); } if (exiting) { if (check_all_dead()) { if (pidfile) { sbd_unlock_pidfile(pidfile); } exit(0); } else continue; } good_servants = 0; for (s = servants_leader; s; s = s->next) { int age = t_now.tv_sec - s->t_last.tv_sec; if (!s->t_last.tv_sec) continue; if (age < (int)(timeout_io+timeout_loop)) { if (sbd_is_disk(s)) { good_servants++; } if (s->outdated) { cl_log(LOG_NOTICE, "Servant %s is healthy (age: %d)", s->devname, age); } s->outdated = 0; } else if (!s->outdated) { if (!s->restart_blocked) { cl_log(LOG_WARNING, "Servant %s is outdated (age: %d)", s->devname, age); } s->outdated = 1; } } if(disk_count == 0) { /* NO disks, everything is up to the cluster */ if(cluster_alive(true)) { /* We LIVE! */ if(cluster_appeared == false) { cl_log(LOG_INFO, "Active cluster detected"); } tickle = 1; can_detach = 1; cluster_appeared = 1; } else if(cluster_alive(false)) { if(!decoupled) { /* On the way up, detach and arm the watchdog */ cl_log(LOG_INFO, "Partial cluster detected, detaching"); } can_detach = 1; tickle = !cluster_appeared; } else if(!decoupled) { /* Stay alive until the cluster comes up */ tickle = !cluster_appeared; } } else if(disk_priority == 1 || servant_count == disk_count) { if (quorum_read(good_servants)) { /* There are disks and we're connected to the majority of them */ tickle = 1; can_detach = 1; pcmk_override = 0; } else if (servant_count > disk_count && cluster_alive(true)) { tickle = 1; if(!pcmk_override) { cl_log(LOG_WARNING, "Majority of devices lost - surviving on pacemaker"); pcmk_override = 1; /* Only log this message once */ } } } else if(cluster_alive(true) && quorum_read(good_servants)) { /* Both disk and cluster servants are healthy */ tickle = 1; can_detach = 1; cluster_appeared = 1; } else if(quorum_read(good_servants)) { /* The cluster takes priority but only once * connected for the first time. * * Until then, we tickle based on disk quorum. */ can_detach = 1; tickle = !cluster_appeared; } /* cl_log(LOG_DEBUG, "Tickle: q=%d, g=%d, p=%d, s=%d", */ /* quorum_read(good_servants), good_servants, tickle, disk_count); */ if(tickle) { watchdog_tickle(); clock_gettime(CLOCK_MONOTONIC, &t_last_tickle); } if (!decoupled && can_detach) { /* We only do this at the point either the disk or * cluster servants become healthy */ cl_log(LOG_DEBUG, "Decoupling"); if (inquisitor_decouple() < 0) { servants_kill(); exiting = 1; continue; } else { decoupled = 1; } } /* Note that this can actually be negative, since we set * last_tickle after we set now. */ latency = t_now.tv_sec - t_last_tickle.tv_sec; if (timeout_watchdog && (latency > (int)timeout_watchdog)) { if (!decoupled) { /* We're still being watched by our * parent. We don't fence, but exit. */ cl_log(LOG_ERR, "SBD: Not enough votes to proceed. Aborting start-up."); servants_kill(); exiting = 1; continue; } if (debug_mode < 2) { /* At level 2 or above, we do nothing, but expect * things to eventually return to * normal. */ do_timeout_action(); } else { cl_log(LOG_ERR, "SBD: DEBUG MODE: Would have fenced due to timeout!"); } } if (timeout_watchdog_warn && (latency > (int)timeout_watchdog_warn)) { cl_log(LOG_WARNING, "Latency: No liveness for %ds exceeds watchdog warning timeout of %ds (healthy servants: %d)", (int)latency, (int)timeout_watchdog_warn, good_servants); if (debug_mode && watchdog_use) { /* In debug mode, trigger a reset before the watchdog can panic the machine */ do_timeout_action(); } } for (s = servants_leader; s; s = s->next) { int age = t_now.tv_sec - s->t_started.tv_sec; if (age > servant_restart_interval) { s->restarts = 0; s->restart_blocked = 0; } if (servant_restart_count && (s->restarts >= servant_restart_count) && !s->restart_blocked) { if (servant_restart_count > 1) { cl_log(LOG_WARNING, "Max retry count (%d) reached: not restarting servant for %s", (int)servant_restart_count, s->devname); } s->restart_blocked = 1; } if (!s->restart_blocked) { servant_start(s); } } } /* not reached */ exit(0); } int inquisitor(void) { int sig, pid, inquisitor_pid; int status; sigset_t procmask; siginfo_t sinfo; /* Where's the best place for sysrq init ?*/ sysrq_init(); sigemptyset(&procmask); sigaddset(&procmask, SIGCHLD); sigaddset(&procmask, SIG_LIVENESS); sigprocmask(SIG_BLOCK, &procmask, NULL); inquisitor_pid = make_daemon(); if (inquisitor_pid == 0) { inquisitor_child(); } /* We're the parent. Wait for a happy signal from our child * before we proceed - we either get "SIG_LIVENESS" when the * inquisitor has completed the first successful round, or * ECHLD when it exits with an error. */ while (1) { sig = sigwaitinfo(&procmask, &sinfo); if (sig == SIGCHLD) { while ((pid = waitpid(-1, &status, WNOHANG))) { if (pid == -1 && errno == ECHILD) { break; } /* We got here because the inquisitor * did not succeed. */ return -1; } } else if (sig == SIG_LIVENESS) { /* Inquisitor started up properly. */ return 0; } else { fprintf(stderr, "Nobody expected the spanish inquisition!\n"); continue; } } /* not reached */ return -1; } int parse_device_line(const char *line) { size_t lpc = 0; size_t last = 0; size_t max = 0; int found = 0; bool skip_space = true; int space_run = 0; if (!line) { return 0; } max = strlen(line); cl_log(LOG_DEBUG, "Processing %d bytes: [%s]", (int) max, line); for (lpc = 0; lpc <= max; lpc++) { if (isspace(line[lpc])) { if (skip_space) { last = lpc + 1; } else { space_run++; } continue; } skip_space = false; if (line[lpc] == ';' || line[lpc] == 0) { int rc = 0; char *entry = calloc(1, 1 + lpc - last); if (entry) { rc = sscanf(line + last, "%[^;]", entry); } else { fprintf(stderr, "Heap allocation failed parsing device-line.\n"); exit(1); } if (rc != 1) { cl_log(LOG_WARNING, "Could not parse: '%s'", line + last); } else { entry[strlen(entry)-space_run] = '\0'; cl_log(LOG_DEBUG, "Adding '%s'", entry); if (recruit_servant(entry, 0) != 0) { free(entry); // sbd should refuse to start if any of the configured device names is invalid. return -1; } found++; } free(entry); skip_space = true; last = lpc + 1; } space_run = 0; } return found; } #define SBD_SOURCE_FILES "sbd-cluster.c,sbd-common.c,sbd-inquisitor.c,sbd-md.c,sbd-pacemaker.c,setproctitle.c" static void sbd_log_filter_ctl(const char *files, uint8_t priority) { if (files == NULL) { files = SBD_SOURCE_FILES; } qb_log_filter_ctl(QB_LOG_SYSLOG, QB_LOG_FILTER_ADD, QB_LOG_FILTER_FILE, files, priority); qb_log_filter_ctl(QB_LOG_STDERR, QB_LOG_FILTER_ADD, QB_LOG_FILTER_FILE, files, priority); } int arg_enabled(int arg_count) { return arg_count % 2; } int main(int argc, char **argv, char **envp) { int exit_status = 0; int c; int W_count = 0; int c_count = 0; int P_count = 0; int qb_facility; const char *value = NULL; bool delay_start = false; long delay = 0; char *timeout_action = NULL; if ((cmdname = strrchr(argv[0], '/')) == NULL) { cmdname = argv[0]; } else { ++cmdname; } watchdogdev = strdup("/dev/watchdog"); watchdogdev_is_default = true; qb_facility = qb_log_facility2int("daemon"); qb_log_init(cmdname, qb_facility, LOG_WARNING); sbd_set_format_string(QB_LOG_SYSLOG, "sbd"); qb_log_ctl(QB_LOG_SYSLOG, QB_LOG_CONF_ENABLED, QB_TRUE); qb_log_ctl(QB_LOG_STDERR, QB_LOG_CONF_ENABLED, QB_FALSE); sbd_log_filter_ctl(NULL, LOG_NOTICE); sbd_get_uname(); value = get_env_option("SBD_PACEMAKER"); if(value) { check_pcmk = crm_is_true(value); check_cluster = crm_is_true(value); } cl_log(LOG_INFO, "Enable pacemaker checks: %d (%s)", (int)check_pcmk, value?value:"default"); value = get_env_option("SBD_STARTMODE"); if(value == NULL) { } else if(strcmp(value, "clean") == 0) { start_mode = 1; } else if(strcmp(value, "always") == 0) { start_mode = 0; } cl_log(LOG_INFO, "Start mode set to: %d (%s)", (int)start_mode, value?value:"default"); value = get_env_option("SBD_WATCHDOG_DEV"); if(value) { free(watchdogdev); watchdogdev = strdup(value); watchdogdev_is_default = false; } /* SBD_WATCHDOG has been dropped from sbd.sysconfig example. * This is for backward compatibility. */ value = get_env_option("SBD_WATCHDOG"); if(value) { watchdog_use = crm_is_true(value); } value = get_env_option("SBD_WATCHDOG_TIMEOUT"); if(value) { timeout_watchdog = crm_get_msec(value) / 1000; } value = get_env_option("SBD_PIDFILE"); if(value) { pidfile = strdup(value); cl_log(LOG_INFO, "pidfile set to %s", pidfile); } value = get_env_option("SBD_DELAY_START"); if(value) { delay_start = crm_is_true(value); if (!delay_start) { delay = crm_get_msec(value) / 1000; if (delay > 0) { delay_start = true; } } } cl_log(LOG_DEBUG, "Delay start: %s%s%s", delay_start? "yes (" : "no", delay_start? (delay > 0 ? value: "msgwait") : "", delay_start? ")" : ""); value = get_env_option("SBD_TIMEOUT_ACTION"); if(value) { timeout_action = strdup(value); } value = get_env_option("SBD_MOVE_TO_ROOT_CGROUP"); if(value) { move_to_root_cgroup = crm_is_true(value); if (move_to_root_cgroup) { enforce_moving_to_root_cgroup = true; } else { if (strcmp(value, "auto") == 0) { move_to_root_cgroup = true; } } } while ((c = getopt(argc, argv, "czC:DPRTWZhvw:d:n:p:1:2:3:4:5:t:I:F:S:s:r:")) != -1) { switch (c) { case 'D': break; case 'Z': debug_mode++; cl_log(LOG_INFO, "Debug mode now at level %d", (int)debug_mode); break; case 'R': skip_rt = 1; cl_log(LOG_INFO, "Realtime mode deactivated."); break; case 'S': start_mode = atoi(optarg); cl_log(LOG_INFO, "Start mode set to: %d", (int)start_mode); break; case 's': timeout_startup = atoi(optarg); cl_log(LOG_INFO, "Start timeout set to: %d", (int)timeout_startup); break; case 'v': debug++; if(debug == 1) { sbd_log_filter_ctl(NULL, LOG_INFO); cl_log(LOG_INFO, "Verbose mode enabled."); } else if(debug == 2) { sbd_log_filter_ctl(NULL, LOG_DEBUG); cl_log(LOG_INFO, "Debug mode enabled."); } else if(debug == 3) { /* Go nuts, turn on pacemaker's logging too */ sbd_log_filter_ctl("*", LOG_DEBUG); cl_log(LOG_INFO, "Debug library mode enabled."); } break; case 'T': watchdog_set_timeout = 0; cl_log(LOG_INFO, "Setting watchdog timeout disabled; using defaults."); break; case 'W': W_count++; break; case 'w': cl_log(LOG_NOTICE, "Using watchdog device '%s'", watchdogdev); free(watchdogdev); watchdogdev = strdup(optarg); watchdogdev_is_default = false; break; case 'd': #if SUPPORT_SHARED_DISK if (recruit_servant(optarg, 0) != 0) { fprintf(stderr, "Invalid device: %s\n", optarg); exit_status = -1; goto out; } #else fprintf(stderr, "Shared disk functionality not supported\n"); exit_status = -2; goto out; #endif break; case 'c': c_count++; break; case 'P': P_count++; break; case 'z': disk_priority = 0; break; case 'n': local_uname = strdup(optarg); cl_log(LOG_INFO, "Overriding local hostname to %s", local_uname); break; case 'p': pidfile = strdup(optarg); cl_log(LOG_INFO, "pidfile set to %s", pidfile); break; case 'C': timeout_watchdog_crashdump = atoi(optarg); cl_log(LOG_INFO, "Setting crashdump watchdog timeout to %d", (int)timeout_watchdog_crashdump); break; case '1': timeout_watchdog = atoi(optarg); break; case '2': timeout_allocate = atoi(optarg); break; case '3': timeout_loop = atoi(optarg); break; case '4': timeout_msgwait = atoi(optarg); break; case '5': timeout_watchdog_warn = atoi(optarg); do_calculate_timeout_watchdog_warn = false; cl_log(LOG_INFO, "Setting latency warning to %d", (int)timeout_watchdog_warn); break; case 't': servant_restart_interval = atoi(optarg); cl_log(LOG_INFO, "Setting servant restart interval to %d", (int)servant_restart_interval); break; case 'I': timeout_io = atoi(optarg); cl_log(LOG_INFO, "Setting IO timeout to %d", (int)timeout_io); break; case 'F': servant_restart_count = atoi(optarg); cl_log(LOG_INFO, "Servant restart count set to %d", (int)servant_restart_count); break; case 'r': if (timeout_action) { free(timeout_action); } timeout_action = strdup(optarg); break; case 'h': usage(); goto out; break; default: exit_status = -2; goto out; break; } } if (disk_count == 0) { /* if we already have disks from commandline then it is probably undesirable to add those from environment (general rule cmdline has precedence) */ value = get_env_option("SBD_DEVICE"); if ((value) && strlen(value)) { #if SUPPORT_SHARED_DISK int devices = parse_device_line(value); if(devices < 1) { fprintf(stderr, "Invalid device line: %s\n", value); exit_status = -1; goto out; } #else fprintf(stderr, "Shared disk functionality not supported\n"); exit_status = -2; goto out; #endif } } if (watchdogdev == NULL || strcmp(watchdogdev, "/dev/null") == 0) { watchdog_use = 0; } else if (W_count > 0) { watchdog_use = arg_enabled(W_count); } if (watchdog_use) { cl_log(LOG_INFO, "Watchdog enabled."); } else { cl_log(LOG_INFO, "Watchdog disabled."); } if (c_count > 0) { check_cluster = arg_enabled(c_count); } if (P_count > 0) { check_pcmk = arg_enabled(P_count); } if ((disk_count > 0) && (strlen(local_uname) > SECTOR_NAME_MAX)) { fprintf(stderr, "Node name mustn't be longer than %d chars.\n", SECTOR_NAME_MAX); fprintf(stderr, "If uname is longer define a name to be used by sbd.\n"); exit_status = -1; goto out; } if (disk_count > 3) { fprintf(stderr, "You can specify up to 3 devices via the -d option.\n"); exit_status = -1; goto out; } /* There must at least be one command following the options: */ if ((argc - optind) < 1) { fprintf(stderr, "Not enough arguments.\n"); exit_status = -2; goto out; } if (init_set_proc_title(argc, argv, envp) < 0) { fprintf(stderr, "Allocation of proc title failed.\n"); exit_status = -1; goto out; } if (timeout_action) { char *p[2]; int i; char c; int nrflags = sscanf(timeout_action, "%m[a-z],%m[a-z]%c", &p[0], &p[1], &c); bool parse_error = (nrflags < 1) || (nrflags > 2); for (i = 0; (i < nrflags) && (i < 2); i++) { if (!strcmp(p[i], "reboot")) { timeout_sysrq_char = 'b'; } else if (!strcmp(p[i], "crashdump")) { timeout_sysrq_char = 'c'; } else if (!strcmp(p[i], "off")) { timeout_sysrq_char = 'o'; } else if (!strcmp(p[i], "flush")) { do_flush = true; } else if (!strcmp(p[i], "noflush")) { do_flush = false; } else { parse_error = true; } free(p[i]); } if (parse_error) { fprintf(stderr, "Failed to parse timeout-action \"%s\".\n", timeout_action); exit_status = -1; goto out; } } if (strcmp(argv[optind], "watch") == 0) { value = get_env_option("SBD_SYNC_RESOURCE_STARTUP"); sync_resource_startup = crm_is_true(value?value:SBD_SYNC_RESOURCE_STARTUP_DEFAULT); #if !USE_PACEMAKERD_API if (sync_resource_startup) { fprintf(stderr, "Failed to sync resource-startup as " "SBD was built against pacemaker not supporting pacemakerd-API.\n"); exit_status = -1; goto out; } #else if (!sync_resource_startup) { cl_log(LOG_WARNING, "SBD built against pacemaker supporting " "pacemakerd-API. Should think about enabling " "SBD_SYNC_RESOURCE_STARTUP."); } #endif } #if SUPPORT_SHARED_DISK if (strcmp(argv[optind], "create") == 0) { exit_status = init_devices(servants_leader); } else if (strcmp(argv[optind], "dump") == 0) { exit_status = dump_headers(servants_leader); } else if (strcmp(argv[optind], "allocate") == 0) { exit_status = allocate_slots(argv[optind + 1], servants_leader); } else if (strcmp(argv[optind], "list") == 0) { exit_status = list_slots(servants_leader); } else if (strcmp(argv[optind], "message") == 0) { exit_status = messenger(argv[optind + 1], argv[optind + 2], servants_leader); } else if (strcmp(argv[optind], "ping") == 0) { exit_status = ping_via_slots(argv[optind + 1], servants_leader); } else if (strcmp(argv[optind], "watch") == 0) { if(disk_count > 0) { /* If no devices are specified, its not an error to be unable to find one */ open_any_device(servants_leader); } if (delay_start) { if (delay <= 0) { delay = get_first_msgwait(servants_leader); } sleep((unsigned long) delay); } } else { exit_status = -2; } #endif /* Re-calculate timeout_watchdog_warn based on any timeout_watchdog from: * SBD_WATCHDOG_TIMEOUT, -1 option or on-disk setting read with open_any_device() */ if (do_calculate_timeout_watchdog_warn) { timeout_watchdog_warn = calculate_timeout_watchdog_warn(timeout_watchdog); } if (strcmp(argv[optind], "query-watchdog") == 0) { exit_status = watchdog_info(); } else if (strcmp(argv[optind], "test-watchdog") == 0) { exit_status = watchdog_test(); } else if (strcmp(argv[optind], "watch") == 0) { /* sleep $(sbd $SBD_DEVICE_ARGS dump | grep -m 1 msgwait | awk '{print $4}') 2>/dev/null */ /* We only want this to have an effect during watch right now; * pinging and fencing would be too confused */ cl_log(LOG_INFO, "Turning on pacemaker checks: %d", check_pcmk); if (check_pcmk) { recruit_servant("pcmk", 0); #if SUPPORT_PLUGIN check_cluster = 1; #endif } cl_log(LOG_INFO, "Turning on cluster checks: %d", check_cluster); if (check_cluster) { recruit_servant("cluster", 0); } cl_log(LOG_NOTICE, "%s flush + write \'%c\' to sysrq in case of timeout", do_flush?"Do":"Skip", timeout_sysrq_char); exit_status = inquisitor(); } out: if (timeout_action) { free(timeout_action); } if (exit_status < 0) { if (exit_status == -2) { usage(); } else { fprintf(stderr, "sbd failed; please check the logs.\n"); } return (1); } return (0); } diff --git a/src/sbd.h b/src/sbd.h index 7c3c1ec..ecf7027 100644 --- a/src/sbd.h +++ b/src/sbd.h @@ -1,218 +1,221 @@ /* * Copyright (C) 2013 Lars Marowsky-Bree * * 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 program; if not, write to the Free Software Foundation, Inc., * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include /* signals reserved for multi-disk sbd */ #define SIG_LIVENESS (SIGRTMIN + 1) /* report liveness of the disk */ #define SIG_EXITREQ (SIGRTMIN + 2) /* exit request to inquisitor */ #define SIG_TEST (SIGRTMIN + 3) /* trigger self test */ #define SIG_RESTART (SIGRTMIN + 4) /* trigger restart of all failed disk */ #define SIG_PCMK_UNHEALTHY (SIGRTMIN + 5) /* FIXME: should add dynamic check of SIG_XX >= SIGRTMAX */ /* exit status for disk-servant */ #define EXIT_MD_SERVANT_IO_FAIL 20 #define EXIT_MD_SERVANT_REQUEST_RESET 21 #define EXIT_MD_SERVANT_REQUEST_SHUTOFF 22 #define EXIT_MD_SERVANT_REQUEST_CRASHDUMP 23 /* exit status for pcmk-servant */ #define EXIT_PCMK_SERVANT_GRACEFUL_SHUTDOWN 30 +/* exit status for cluster-servant */ +#define EXIT_CLUSTER_DISCONNECT 40 + #define HOG_CHAR 0xff #define SECTOR_NAME_MAX 63 /* Sector data types */ struct sector_header_s { char magic[8]; unsigned char version; unsigned char slots; /* Caveat: stored in network byte-order */ uint32_t sector_size; uint32_t timeout_watchdog; uint32_t timeout_allocate; uint32_t timeout_loop; uint32_t timeout_msgwait; /* Minor version for extensions to the core data set: * compatible and optional values. */ unsigned char minor_version; uuid_t uuid; /* 16 bytes */ }; struct sector_mbox_s { signed char cmd; char from[SECTOR_NAME_MAX+1]; }; struct sector_node_s { /* slots will be created with in_use == 0 */ char in_use; char name[SECTOR_NAME_MAX+1]; }; struct servants_list_item { const char* devname; pid_t pid; int restarts; int restart_blocked; int outdated; int first_start; struct timespec t_last, t_started; struct servants_list_item *next; }; struct sbd_context { int devfd; io_context_t ioctx; struct iocb io; }; enum pcmk_health { pcmk_health_unknown, pcmk_health_pending, pcmk_health_transient, pcmk_health_unclean, pcmk_health_shutdown, pcmk_health_online, pcmk_health_noquorum, }; void usage(void); int watchdog_init_interval(void); int watchdog_tickle(void); int watchdog_init(void); void sysrq_init(void); void watchdog_close(bool disarm); int watchdog_info(void); int watchdog_test(void); void sysrq_trigger(char t); void do_crashdump(void); void do_reset(void); void do_off(void); void do_timeout_action(void); pid_t make_daemon(void); void maximize_priority(void); void sbd_get_uname(void); void sbd_set_format_string(int method, const char *daemon); void notify_parent(void); /* Tunable defaults: */ extern unsigned long timeout_watchdog; extern unsigned long timeout_watchdog_warn; extern bool do_calculate_timeout_watchdog_warn; extern unsigned long timeout_watchdog_crashdump; extern int timeout_allocate; extern int timeout_loop; extern int timeout_msgwait; extern int timeout_io; extern int timeout_startup; extern int watchdog_use; extern int watchdog_set_timeout; extern int skip_rt; extern int debug; extern int debug_mode; extern char *watchdogdev; extern bool watchdogdev_is_default; extern char* local_uname; extern bool do_flush; extern char timeout_sysrq_char; extern bool move_to_root_cgroup; extern bool enforce_moving_to_root_cgroup; extern bool sync_resource_startup; /* Global, non-tunable variables: */ extern int sector_size; extern int watchdogfd; extern const char* cmdname; typedef int (*functionp_t)(const char* devname, int mode, const void* argp); int assign_servant(const char* devname, functionp_t functionp, int mode, const void* argp); #if SUPPORT_SHARED_DISK void open_any_device(struct servants_list_item *servants); int init_devices(struct servants_list_item *servants); int allocate_slots(const char *name, struct servants_list_item *servants); int list_slots(struct servants_list_item *servants); int ping_via_slots(const char *name, struct servants_list_item *servants); int dump_headers(struct servants_list_item *servants); unsigned long get_first_msgwait(struct servants_list_item *servants); int messenger(const char *name, const char *msg, struct servants_list_item *servants); int servant_md(const char *diskname, int mode, const void* argp); #endif int servant_pcmk(const char *diskname, int mode, const void* argp); int servant_cluster(const char *diskname, int mode, const void* argp); struct servants_list_item *lookup_servant_by_dev(const char *devname); struct servants_list_item *lookup_servant_by_pid(pid_t pid); int init_set_proc_title(int argc, char *argv[], char *envp[]); void set_proc_title(const char *fmt,...); #define cl_log(level, fmt, args...) qb_log_from_external_source( __func__, __FILE__, fmt, level, __LINE__, 0, ##args) # define cl_perror(fmt, args...) do { \ const char *err = strerror(errno); \ cl_log(LOG_ERR, fmt ": %s (%d)", ##args, err, errno); \ } while(0) #define DBGLOG(lvl, fmt, args...) do { \ if (debug > 0) cl_log(lvl, fmt, ##args); \ } while(0) extern int servant_health; void set_servant_health(enum pcmk_health state, int level, char const *format, ...) __attribute__ ((__format__ (__printf__, 3, 4))); bool sbd_is_disk(struct servants_list_item *servant); bool sbd_is_pcmk(struct servants_list_item *servant); bool sbd_is_cluster(struct servants_list_item *servant); #define calculate_timeout_watchdog_warn(timeout) \ (timeout < 5 ? 2 : \ (timeout < (ULONG_MAX / 3) ? \ (((unsigned long) timeout) * 3 / 5) : (((unsigned long) timeout) / 5 * 3)))