pacemaker.c
No OneTemporary
Actions

Size

30 KB

Referenced Files

None

Subscribers

None

pacemaker.c
View Options

	/*
	* Copyright (C) 2010 Andrew Beekhof <andrew@beekhof.net>
	*
	* 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 library; if not, write to the Free Software
	* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
	*/

	#include <crm_internal.h>
	#include <pacemaker.h>

	#include <pwd.h>
	#include <grp.h>
	#include <sys/stat.h>
	#include <sys/types.h>
	#include <sys/time.h>
	#include <sys/resource.h>
	#include <sys/reboot.h>

	#include <crm/msg_xml.h>
	#include <crm/common/ipcs.h>
	#include <crm/common/mainloop.h>
	#include <crm/cluster/internal.h>
	#include <crm/cluster.h>

	#include <dirent.h>
	#include <ctype.h>
	gboolean fatal_error = FALSE;
	GMainLoop *mainloop = NULL;

	#define PCMK_PROCESS_CHECK_INTERVAL 5

	const char *local_name = NULL;
	uint32_t local_nodeid = 0;
	crm_trigger_t *shutdown_trigger = NULL;
	const char *pid_file = "/var/run/pacemaker.pid";

	typedef struct pcmk_child_s {
	int pid;
	long flag;
	int start_seq;
	int respawn_count;
	gboolean respawn;
	const char *name;
	const char *uid;
	const char *command;

	gboolean active_before_startup;
	} pcmk_child_t;

	/* Index into the array below */
	#define pcmk_child_crmd 4
	#define pcmk_child_mgmtd 8
	/* INDENT-OFF */
	static pcmk_child_t pcmk_children[] = {
	{ 0, crm_proc_none, 0, 0, FALSE, "none", NULL, NULL },
	{ 0, crm_proc_plugin, 0, 0, FALSE, "ais", NULL, NULL },
	{ 0, crm_proc_lrmd, 3, 0, TRUE, "lrmd", NULL, CRM_DAEMON_DIR"/lrmd" },
	{ 0, crm_proc_cib, 1, 0, TRUE, "cib", CRM_DAEMON_USER, CRM_DAEMON_DIR"/cib" },
	{ 0, crm_proc_crmd, 6, 0, TRUE, "crmd", CRM_DAEMON_USER, CRM_DAEMON_DIR"/crmd" },
	{ 0, crm_proc_attrd, 4, 0, TRUE, "attrd", CRM_DAEMON_USER, CRM_DAEMON_DIR"/attrd" },
	{ 0, crm_proc_stonithd, 0, 0, TRUE, "stonithd", NULL, NULL },
	{ 0, crm_proc_pe, 5, 0, TRUE, "pengine", CRM_DAEMON_USER, CRM_DAEMON_DIR"/pengine" },
	{ 0, crm_proc_mgmtd, 0, 0, TRUE, "mgmtd", NULL, HB_DAEMON_DIR"/mgmtd" },
	{ 0, crm_proc_stonith_ng, 2, 0, TRUE, "stonith-ng", NULL, CRM_DAEMON_DIR"/stonithd" },
	};
	/* INDENT-ON */

	static gboolean start_child(pcmk_child_t * child);
	static gboolean check_active_before_startup_processes(gpointer user_data);
	void update_process_clients(crm_client_t *client);
	void update_process_peers(void);

	void
	enable_crmd_as_root(gboolean enable)
	{
	if (enable) {
	pcmk_children[pcmk_child_crmd].uid = NULL;
	} else {
	pcmk_children[pcmk_child_crmd].uid = CRM_DAEMON_USER;
	}
	}

	void
	enable_mgmtd(gboolean enable)
	{
	if (enable) {
	pcmk_children[pcmk_child_mgmtd].start_seq = 7;
	} else {
	pcmk_children[pcmk_child_mgmtd].start_seq = 0;
	}
	}

	static uint32_t
	get_process_list(void)
	{
	int lpc = 0;
	uint32_t procs = 0;

	if(is_classic_ais_cluster()) {
	procs \|= crm_proc_plugin;
	}

	for (lpc = 0; lpc < SIZEOF(pcmk_children); lpc++) {
	if (pcmk_children[lpc].pid != 0) {
	procs \|= pcmk_children[lpc].flag;
	}
	}
	return procs;
	}

	static void
	pcmk_process_exit(pcmk_child_t * child)
	{
	child->pid = 0;
	child->active_before_startup = FALSE;

	/* Broadcast the fact that one of our processes died ASAP
	*
	* Try to get some logging of the cause out first though
	* because we're probably about to get fenced
	*
	* Potentially do this only if respawn_count > N
	* to allow for local recovery
	*/
	update_node_processes(local_nodeid, NULL, get_process_list());

	child->respawn_count += 1;
	if (child->respawn_count > MAX_RESPAWN) {
	crm_err("Child respawn count exceeded by %s", child->name);
	child->respawn = FALSE;
	}

	if (shutdown_trigger) {
	mainloop_set_trigger(shutdown_trigger);
	update_node_processes(local_nodeid, NULL, get_process_list());

	} else if (child->respawn) {
	gboolean fail_fast = crm_is_true(getenv("PCMK_fail_fast"));

	crm_notice("Respawning failed child process: %s", child->name);

	#ifdef RB_HALT_SYSTEM
	if (fail_fast) {
	crm_err("Rebooting system", child->name);
	sync();
	reboot(RB_HALT_SYSTEM);
	crm_exit(DAEMON_RESPAWN_STOP);
	}
	#endif
	start_child(child);
	}
	}

	static void
	pcmk_child_exit(mainloop_child_t * p, pid_t pid, int core, int signo, int exitcode)
	{
	pcmk_child_t *child = mainloop_child_userdata(p);
	const char *name = mainloop_child_name(p);

	if (signo) {
	crm_notice("Child process %s terminated with signal %d (pid=%d, core=%d)",
	name, signo, pid, core);

	} else {
	do_crm_log(exitcode == 0 ? LOG_INFO : LOG_ERR,
	"Child process %s (%d) exited: %s (%d)", name, pid, pcmk_strerror(exitcode), exitcode);
	}

	if (exitcode == 100) {
	crm_warn("Pacemaker child process %s no longer wishes to be respawned. "
	"Shutting ourselves down.", name);
	child->respawn = FALSE;
	fatal_error = TRUE;
	pcmk_shutdown(15);
	}

	pcmk_process_exit(child);
	}

	static gboolean
	stop_child(pcmk_child_t * child, int signal)
	{
	if (signal == 0) {
	signal = SIGTERM;
	}

	if (child->command == NULL) {
	crm_debug("Nothing to do for child \"%s\"", child->name);
	return TRUE;
	}

	if (child->pid <= 0) {
	crm_trace("Client %s not running", child->name);
	return TRUE;
	}

	errno = 0;
	if (kill(child->pid, signal) == 0) {
	crm_notice("Stopping %s: Sent -%d to process %d", child->name, signal, child->pid);

	} else {
	crm_perror(LOG_ERR, "Stopping %s: Could not send -%d to process %d failed",
	child->name, signal, child->pid);
	}

	return TRUE;
	}

	static char *opts_default[] = { NULL, NULL };
	static char *opts_vgrind[] = { NULL, NULL, NULL, NULL, NULL };

	static gboolean
	start_child(pcmk_child_t * child)
	{
	int lpc = 0;
	uid_t uid = 0;
	gid_t gid = 0;
	struct rlimit oflimits;
	gboolean use_valgrind = FALSE;
	gboolean use_callgrind = FALSE;
	const char *devnull = "/dev/null";
	const char *env_valgrind = getenv("PCMK_valgrind_enabled");
	const char *env_callgrind = getenv("PCMK_callgrind_enabled");
	enum cluster_type_e stack = get_cluster_type();

	child->active_before_startup = FALSE;

	if (child->command == NULL) {
	crm_info("Nothing to do for child \"%s\"", child->name);
	return TRUE;
	}

	if (env_callgrind != NULL && crm_is_true(env_callgrind)) {
	use_callgrind = TRUE;
	use_valgrind = TRUE;

	} else if (env_callgrind != NULL && strstr(env_callgrind, child->name)) {
	use_callgrind = TRUE;
	use_valgrind = TRUE;

	} else if (env_valgrind != NULL && crm_is_true(env_valgrind)) {
	use_valgrind = TRUE;

	} else if (env_valgrind != NULL && strstr(env_valgrind, child->name)) {
	use_valgrind = TRUE;
	}

	if (use_valgrind && strlen(VALGRIND_BIN) == 0) {
	crm_warn("Cannot enable valgrind for %s:"
	" The location of the valgrind binary is unknown", child->name);
	use_valgrind = FALSE;
	}

	if (child->uid) {
	if (crm_user_lookup(child->uid, &uid, &gid) < 0) {
	crm_err("Invalid user (%s) for %s: not found", child->uid, child->name);
	return FALSE;
	}
	crm_info("Using uid=%u and group=%u for process %s", uid, gid, child->name);
	}

	child->pid = fork();
	CRM_ASSERT(child->pid != -1);

	if (child->pid > 0) {
	/* parent */
	mainloop_child_add(child->pid, 0, child->name, child, pcmk_child_exit);

	crm_info("Forked child %d for process %s%s", child->pid, child->name,
	use_valgrind ? " (valgrind enabled: " VALGRIND_BIN ")" : "");
	update_node_processes(local_nodeid, NULL, get_process_list());
	return TRUE;

	} else {
	/* Start a new session */
	(void)setsid();

	/* Setup the two alternate arg arrarys */
	opts_vgrind[0] = strdup(VALGRIND_BIN);
	if (use_callgrind) {
	opts_vgrind[1] = strdup("--tool=callgrind");
	opts_vgrind[2] = strdup("--callgrind-out-file=" CRM_STATE_DIR "/callgrind.out.%p");
	opts_vgrind[3] = strdup(child->command);
	opts_vgrind[4] = NULL;
	} else {
	opts_vgrind[1] = strdup(child->command);
	opts_vgrind[2] = NULL;
	opts_vgrind[3] = NULL;
	opts_vgrind[4] = NULL;
	}
	opts_default[0] = strdup(child->command);;

	if(gid) {
	if(stack == pcmk_cluster_corosync) {
	/* Drop root privileges completely
	*
	* We can do this because we set uidgid.gid.${gid}=1
	* via CMAP which allows these processes to connect to
	* corosync
	*/
	if (setgid(gid) < 0) {
	crm_perror(LOG_ERR, "Could not set group to %d", gid);
	}

	/* Keep the root group (so we can access corosync), but add the haclient group (so we can access ipc) */
	} else if (initgroups(child->uid, gid) < 0) {
	crm_err("Cannot initalize groups for %s: %s (%d)", child->uid, pcmk_strerror(errno), errno);
	}
	}

	if (uid && setuid(uid) < 0) {
	crm_perror(LOG_ERR, "Could not set user to %d (%s)", uid, child->uid);
	}

	/* Close all open file descriptors */
	getrlimit(RLIMIT_NOFILE, &oflimits);
	for (lpc = 0; lpc < oflimits.rlim_cur; lpc++) {
	close(lpc);
	}

	(void)open(devnull, O_RDONLY); /* Stdin: fd 0 */
	(void)open(devnull, O_WRONLY); /* Stdout: fd 1 */
	(void)open(devnull, O_WRONLY); /* Stderr: fd 2 */

	if (use_valgrind) {
	(void)execvp(VALGRIND_BIN, opts_vgrind);
	} else {
	(void)execvp(child->command, opts_default);
	}
	crm_perror(LOG_ERR, "FATAL: Cannot exec %s", child->command);
	crm_exit(DAEMON_RESPAWN_STOP);
	}
	return TRUE; /* never reached */
	}

	static gboolean
	escalate_shutdown(gpointer data)
	{

	pcmk_child_t *child = data;

	if (child->pid) {
	/* Use SIGSEGV instead of SIGKILL to create a core so we can see what it was up to */
	crm_err("Child %s not terminating in a timely manner, forcing", child->name);
	stop_child(child, SIGSEGV);
	}
	return FALSE;
	}

	static gboolean
	pcmk_shutdown_worker(gpointer user_data)
	{
	static int phase = 0;
	static time_t next_log = 0;
	static int max = SIZEOF(pcmk_children);

	int lpc = 0;

	if (phase == 0) {
	crm_notice("Shuting down Pacemaker");
	phase = max;

	/* Add a second, more frequent, check to speed up shutdown */
	g_timeout_add_seconds(5, check_active_before_startup_processes, NULL);
	}

	for (; phase > 0; phase--) {
	/* dont stop anything with start_seq < 1 */

	for (lpc = max - 1; lpc >= 0; lpc--) {
	pcmk_child_t *child = &(pcmk_children[lpc]);

	if (phase != child->start_seq) {
	continue;
	}

	if (child->pid) {
	time_t now = time(NULL);

	if (child->respawn) {
	next_log = now + 30;
	child->respawn = FALSE;
	stop_child(child, SIGTERM);
	if (phase < pcmk_children[pcmk_child_crmd].start_seq) {
	g_timeout_add(180000 /* 3m */ , escalate_shutdown, child);
	}

	} else if (now >= next_log) {
	next_log = now + 30;
	crm_notice("Still waiting for %s (pid=%d, seq=%d) to terminate...",
	child->name, child->pid, child->start_seq);
	}
	return TRUE;
	}

	/* cleanup */
	crm_debug("%s confirmed stopped", child->name);
	child->pid = 0;
	}
	}

	/* send_cluster_id(); */
	crm_notice("Shutdown complete");
	g_main_loop_quit(mainloop);

	if (fatal_error) {
	crm_notice("Attempting to inhibit respawning after fatal error");
	crm_exit(DAEMON_RESPAWN_STOP);
	}

	return TRUE;
	}

	void
	pcmk_shutdown(int nsig)
	{
	if (shutdown_trigger == NULL) {
	shutdown_trigger = mainloop_add_trigger(G_PRIORITY_HIGH, pcmk_shutdown_worker, NULL);
	}
	mainloop_set_trigger(shutdown_trigger);
	}

	static int32_t
	pcmk_ipc_accept(qb_ipcs_connection_t * c, uid_t uid, gid_t gid)
	{
	crm_trace("Connection %p", c);
	if (crm_client_new(c, uid, gid) == NULL) {
	return -EIO;
	}
	return 0;
	}

	static void
	pcmk_ipc_created(qb_ipcs_connection_t * c)
	{
	crm_trace("Connection %p", c);
	}

	/* Exit code means? */
	static int32_t
	pcmk_ipc_dispatch(qb_ipcs_connection_t * qbc, void *data, size_t size)
	{
	uint32_t id = 0;
	uint32_t flags = 0;
	const char *task = NULL;
	crm_client_t *c = crm_client_get(qbc);
	xmlNode *msg = crm_ipcs_recv(c, data, size, &id, &flags);

	crm_ipcs_send_ack(c, id, flags, "ack", __FUNCTION__, __LINE__);
	if (msg == NULL) {
	return 0;
	}

	task = crm_element_value(msg, F_CRM_TASK);
	if (crm_str_eq(task, CRM_OP_QUIT, TRUE)) {
	/* Time to quit */
	crm_notice("Shutting down in responce to ticket %s (%s)",
	crm_element_value(msg, F_CRM_REFERENCE), crm_element_value(msg, F_CRM_ORIGIN));
	pcmk_shutdown(15);

	} else if (crm_str_eq(task, CRM_OP_RM_NODE_CACHE, TRUE)) {
	/* Send to everyone */
	struct iovec *iov;
	int id = 0;
	const char *name = NULL;

	crm_element_value_int(msg, XML_ATTR_ID, &id);
	name = crm_element_value(msg, XML_ATTR_UNAME);
	crm_notice("Instructing peers to remove references to node %s/%u", name, id);

	iov = calloc(1, sizeof(struct iovec));
	iov->iov_base = dump_xml_unformatted(msg);
	iov->iov_len = 1 + strlen(iov->iov_base);
	send_cpg_iov(iov);

	} else {
	update_process_clients(c);
	}

	free_xml(msg);
	return 0;
	}

	/* Error code means? */
	static int32_t
	pcmk_ipc_closed(qb_ipcs_connection_t * c)
	{
	crm_client_t *client = crm_client_get(c);

	if (client == NULL) {
	return 0;
	}
	crm_trace("Connection %p", c);
	crm_client_destroy(client);
	return 0;
	}

	static void
	pcmk_ipc_destroy(qb_ipcs_connection_t * c)
	{
	crm_trace("Connection %p", c);
	pcmk_ipc_closed(c);
	}

	struct qb_ipcs_service_handlers mcp_ipc_callbacks = {
	.connection_accept = pcmk_ipc_accept,
	.connection_created = pcmk_ipc_created,
	.msg_process = pcmk_ipc_dispatch,
	.connection_closed = pcmk_ipc_closed,
	.connection_destroyed = pcmk_ipc_destroy
	};

	void
	update_process_clients(crm_client_t *client)
	{
	GHashTableIter iter;
	crm_node_t *node = NULL;
	xmlNode *update = create_xml_node(NULL, "nodes");

	crm_trace("Sending process list to %d children", crm_hash_table_size(client_connections));

	g_hash_table_iter_init(&iter, crm_peer_cache);
	while (g_hash_table_iter_next(&iter, NULL, (gpointer *) & node)) {
	xmlNode *xml = create_xml_node(update, "node");

	crm_xml_add_int(xml, "id", node->id);
	crm_xml_add(xml, "uname", node->uname);
	crm_xml_add(xml, "state", node->state);
	crm_xml_add_int(xml, "processes", node->processes);
	}

	if(client) {
	crm_ipcs_send(client, 0, update, crm_ipc_server_event);

	} else {
	g_hash_table_iter_init(&iter, client_connections);
	while (g_hash_table_iter_next(&iter, NULL, (gpointer *) & client)) {
	crm_ipcs_send(client, 0, update, crm_ipc_server_event);
	}
	}

	free_xml(update);
	}

	void
	update_process_peers(void)
	{
	/* Do nothing for corosync-2 based clusters */

	char buffer[1024];
	struct iovec *iov;
	int rc = 0;

	memset(buffer, 0, SIZEOF(buffer));

	if (local_name) {
	rc = snprintf(buffer, SIZEOF(buffer) - 1, "<node uname=\"%s\" proclist=\"%u\"/>",
	local_name, get_process_list());
	} else {
	rc = snprintf(buffer, SIZEOF(buffer) - 1, "<node proclist=\"%u\"/>", get_process_list());
	}

	crm_trace("Sending %s", buffer);
	iov = calloc(1, sizeof(struct iovec));
	iov->iov_base = strdup(buffer);
	iov->iov_len = rc + 1;
	send_cpg_iov(iov);
	}

	gboolean
	update_node_processes(uint32_t id, const char *uname, uint32_t procs)
	{
	gboolean changed = FALSE;
	crm_node_t *node = crm_get_peer(id, uname);

	if (procs != 0) {
	if (procs != node->processes) {
	crm_debug("Node %s now has process list: %.32x (was %.32x)",
	node->uname, procs, node->processes);
	node->processes = procs;
	changed = TRUE;

	} else {
	crm_trace("Node %s still has process list: %.32x", node->uname, procs);
	}
	}

	if (changed && id == local_nodeid) {
	update_process_clients(NULL);
	update_process_peers();
	}
	return changed;
	}


	/* INDENT-OFF */
	static struct crm_option long_options[] = {
	/* Top-level Options */
	{"help", 0, 0, '?', "\tThis text"},
	{"version", 0, 0, '$', "\tVersion information" },
	{"verbose", 0, 0, 'V', "\tIncrease debug output"},
	{"shutdown", 0, 0, 'S', "\tInstruct Pacemaker to shutdown on this machine"},
	{"features", 0, 0, 'F', "\tDisplay the full version and list of features Pacemaker was built with"},

	{"-spacer-", 1, 0, '-', "\nAdditional Options:"},
	{"foreground", 0, 0, 'f', "\t(Ignored) Pacemaker always runs in the foreground"},
	{"pid-file", 1, 0, 'p', "\t(Ignored) Daemon pid file location"},

	{NULL, 0, 0, 0}
	};
	/* INDENT-ON */

	static void
	mcp_chown(const char *path, uid_t uid, gid_t gid)
	{
	int rc = chown(path, uid, gid);

	if (rc < 0) {
	crm_warn("Cannot change the ownership of %s to user %s and gid %d: %s",
	path, CRM_DAEMON_USER, gid, pcmk_strerror(errno));
	}
	}

	static gboolean
	check_active_before_startup_processes(gpointer user_data)
	{
	int start_seq = 1, lpc = 0;
	static int max = SIZEOF(pcmk_children);
	gboolean keep_tracking = FALSE;

	for (start_seq = 1; start_seq < max; start_seq++) {
	for (lpc = 0; lpc < max; lpc++) {
	if (pcmk_children[lpc].active_before_startup == FALSE) {
	/* we are already tracking it as a child process. */
	continue;
	} else if (start_seq != pcmk_children[lpc].start_seq) {
	continue;
	} else if (crm_pid_active(pcmk_children[lpc].pid) != 1) {
	crm_notice("Process %s terminated (pid=%d)",
	pcmk_children[lpc].name, pcmk_children[lpc].pid);
	pcmk_process_exit(&(pcmk_children[lpc]));
	continue;
	}
	/* at least one of the processes found at startup
	* is still going, so keep this recurring timer around */
	keep_tracking = TRUE;
	}
	}

	return keep_tracking;
	}

	static void
	find_and_track_existing_processes(void)
	{
	DIR *dp;
	struct dirent *entry;
	struct stat statbuf;
	int start_tracker = 0;

	dp = opendir("/proc");
	if (!dp) {
	/* no proc directory to search through */
	crm_notice("Can not read /proc directory to track existing components");
	return;
	}

	while ((entry = readdir(dp)) != NULL) {
	char procpath[128];
	char value[64];
	char key[16];
	FILE *file;
	int pid;
	int max = SIZEOF(pcmk_children);
	int i;

	strcpy(procpath, "/proc/");
	/* strlen("/proc/") + strlen("/status") + 1 = 14
	* 128 - 14 = 114 */
	strncat(procpath, entry->d_name, 114);

	if (lstat(procpath, &statbuf)) {
	continue;
	}
	if (!S_ISDIR(statbuf.st_mode) \|\| !isdigit(entry->d_name[0])) {
	continue;
	}

	strcat(procpath, "/status");

	file = fopen(procpath, "r");
	if (!file) {
	continue;
	}
	if (fscanf(file, "%15s%63s", key, value) != 2) {
	fclose(file);
	continue;
	}
	fclose(file);

	pid = atoi(entry->d_name);
	if (pid <= 0) {
	continue;
	}

	for (i = 0; i < max; i++) {
	const char *name = pcmk_children[i].name;

	if (pcmk_children[i].start_seq == 0) {
	continue;
	}
	if (pcmk_children[i].flag == crm_proc_stonith_ng) {
	name = "stonithd";
	}
	if (safe_str_eq(name, value)) {
	if (crm_pid_active(pid) != 1) {
	continue;
	}
	crm_notice("Tracking existing %s process (pid=%d)", value, pid);
	pcmk_children[i].pid = pid;
	pcmk_children[i].active_before_startup = TRUE;
	start_tracker = 1;
	}
	}
	}

	if (start_tracker) {
	g_timeout_add_seconds(PCMK_PROCESS_CHECK_INTERVAL, check_active_before_startup_processes,
	NULL);
	}
	closedir(dp);
	}

	static void
	init_children_processes(void)
	{
	int start_seq = 1, lpc = 0;
	static int max = SIZEOF(pcmk_children);

	/* start any children that have not been detected */
	for (start_seq = 1; start_seq < max; start_seq++) {
	/* dont start anything with start_seq < 1 */
	for (lpc = 0; lpc < max; lpc++) {
	if (pcmk_children[lpc].pid) {
	/* we are already tracking it */
	continue;
	}

	if (start_seq == pcmk_children[lpc].start_seq) {
	start_child(&(pcmk_children[lpc]));
	}
	}
	}
	}

	static void
	mcp_cpg_destroy(gpointer user_data)
	{
	crm_err("Connection destroyed");
	crm_exit(ENOTCONN);
	}

	static void
	mcp_cpg_deliver(cpg_handle_t handle,
	const struct cpg_name *groupName,
	uint32_t nodeid, uint32_t pid, void *msg, size_t msg_len)
	{
	xmlNode *xml = string2xml(msg);
	const char *task = crm_element_value(xml, F_CRM_TASK);

	crm_trace("Received %s %.200s", task, msg);
	if (task == NULL && nodeid != local_nodeid) {
	uint32_t procs = 0;
	const char *uname = crm_element_value(xml, "uname");

	crm_element_value_int(xml, "proclist", (int *)&procs);
	/* crm_debug("Got proclist %.32x from %s", procs, uname); */
	if (update_node_processes(nodeid, uname, procs)) {
	update_process_clients(NULL);
	}

	} else if (crm_str_eq(task, CRM_OP_RM_NODE_CACHE, TRUE)) {
	int id = 0;
	const char *name = NULL;

	crm_element_value_int(xml, XML_ATTR_ID, &id);
	name = crm_element_value(xml, XML_ATTR_UNAME);
	reap_crm_member(id, name);
	}
	}

	static void
	mcp_cpg_membership(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)
	{
	/* Don't care about CPG membership, but we do want to broadcast our own presence */
	update_process_peers();
	}

	static gboolean
	mcp_quorum_callback(unsigned long long seq, gboolean quorate)
	{
	/* Nothing to do */
	return TRUE;
	}

	static void
	mcp_quorum_destroy(gpointer user_data)
	{
	crm_info("connection closed");
	}

	int
	main(int argc, char **argv)
	{
	int rc;
	int flag;
	int argerr = 0;

	int option_index = 0;
	gboolean shutdown = FALSE;

	uid_t pcmk_uid = 0;
	gid_t pcmk_gid = 0;
	struct rlimit cores;
	crm_ipc_t *old_instance = NULL;
	qb_ipcs_service_t *ipcs = NULL;
	const char *facility = daemon_option("logfacility");
	static crm_cluster_t cluster;

	setenv("LC_ALL", "C", 1);
	setenv("HA_LOGD", "no", 1);

	set_daemon_option("mcp", "true");
	set_daemon_option("use_logd", "off");

	crm_log_init(NULL, LOG_INFO, TRUE, FALSE, argc, argv, FALSE);
	crm_set_options(NULL, "mode [options]", long_options, "Start/Stop Pacemaker\n");

	/* Restore the original facility so that mcp_read_config() does the right thing */
	set_daemon_option("logfacility", facility);

	while (1) {
	flag = crm_get_option(argc, argv, &option_index);
	if (flag == -1)
	break;

	switch (flag) {
	case 'V':
	crm_bump_log_level(argc, argv);
	break;
	case 'f':
	/* Legacy */
	break;
	case 'p':
	pid_file = optarg;
	break;
	case '$':
	case '?':
	crm_help(flag, EX_OK);
	break;
	case 'S':
	shutdown = TRUE;
	break;
	case 'F':
	printf("Pacemaker %s (Build: %s)\n Supporting v%s: %s\n", VERSION, BUILD_VERSION,
	CRM_FEATURE_SET, CRM_FEATURES);
	crm_exit(pcmk_ok);
	default:
	printf("Argument code 0%o (%c) is not (?yet?) supported\n", flag, flag);
	++argerr;
	break;
	}
	}

	if (optind < argc) {
	printf("non-option ARGV-elements: ");
	while (optind < argc)
	printf("%s ", argv[optind++]);
	printf("\n");
	}
	if (argerr) {
	crm_help('?', EX_USAGE);
	}

	crm_debug("Checking for old instances of %s", CRM_SYSTEM_MCP);
	old_instance = crm_ipc_new(CRM_SYSTEM_MCP, 0);
	crm_ipc_connect(old_instance);

	if (shutdown) {
	crm_debug("Terminating previous instance");
	while (crm_ipc_connected(old_instance)) {
	xmlNode *cmd =
	create_request(CRM_OP_QUIT, NULL, NULL, CRM_SYSTEM_MCP, CRM_SYSTEM_MCP, NULL);

	crm_debug(".");
	crm_ipc_send(old_instance, cmd, 0, 0, NULL);
	free_xml(cmd);

	sleep(2);
	}
	crm_ipc_close(old_instance);
	crm_ipc_destroy(old_instance);
	crm_exit(pcmk_ok);

	} else if (crm_ipc_connected(old_instance)) {
	crm_ipc_close(old_instance);
	crm_ipc_destroy(old_instance);
	crm_err("Pacemaker is already active, aborting startup");
	crm_exit(DAEMON_RESPAWN_STOP);
	}

	crm_ipc_close(old_instance);
	crm_ipc_destroy(old_instance);

	if (mcp_read_config() == FALSE) {
	crm_notice("Could not obtain corosync config data, exiting");
	crm_exit(ENODATA);
	}

	crm_notice("Starting Pacemaker %s (Build: %s): %s", VERSION, BUILD_VERSION, CRM_FEATURES);
	mainloop = g_main_new(FALSE);

	rc = getrlimit(RLIMIT_CORE, &cores);
	if (rc < 0) {
	crm_perror(LOG_ERR, "Cannot determine current maximum core size.");
	} else {
	if (cores.rlim_max == 0 && geteuid() == 0) {
	cores.rlim_max = RLIM_INFINITY;
	} else {
	crm_info("Maximum core file size is: %lu", (unsigned long)cores.rlim_max);
	}
	cores.rlim_cur = cores.rlim_max;

	rc = setrlimit(RLIMIT_CORE, &cores);
	if (rc < 0) {
	crm_perror(LOG_ERR,
	"Core file generation will remain disabled."
	" Core files are an important diagnositic tool,"
	" please consider enabling them by default.");
	}
	#if 0
	/* system() is not thread-safe, can't call from here
	* Actually, its a pretty hacky way to try and achieve this anyway
	*/
	if (system("echo 1 > /proc/sys/kernel/core_uses_pid") != 0) {
	crm_perror(LOG_ERR, "Could not enable /proc/sys/kernel/core_uses_pid");
	}
	#endif
	}

	if (crm_user_lookup(CRM_DAEMON_USER, &pcmk_uid, &pcmk_gid) < 0) {
	crm_err("Cluster user %s does not exist, aborting Pacemaker startup", CRM_DAEMON_USER);
	crm_exit(ENOKEY);
	}

	mkdir(CRM_STATE_DIR, 0750);
	mcp_chown(CRM_STATE_DIR, pcmk_uid, pcmk_gid);

	/* Used to store core files in */
	crm_build_path(CRM_CORE_DIR, 0775);
	mcp_chown(CRM_CORE_DIR, pcmk_uid, pcmk_gid);

	/* Used to store blackbox dumps in */
	crm_build_path(CRM_BLACKBOX_DIR, 0755);
	mcp_chown(CRM_BLACKBOX_DIR, pcmk_uid, pcmk_gid);

	/* Used to store policy engine inputs in */
	crm_build_path(PE_STATE_DIR, 0755);
	mcp_chown(PE_STATE_DIR, pcmk_uid, pcmk_gid);

	/* Used to store the cluster configuration */
	crm_build_path(CRM_CONFIG_DIR, 0755);
	mcp_chown(CRM_CONFIG_DIR, pcmk_uid, pcmk_gid);

	/* Resource agent paths are constructed by the lrmd */

	ipcs = mainloop_add_ipc_server(CRM_SYSTEM_MCP, QB_IPC_NATIVE, &mcp_ipc_callbacks);
	if (ipcs == NULL) {
	crm_err("Couldn't start IPC server");
	crm_exit(EIO);
	}

	/* Allows us to block shutdown */
	if (cluster_connect_cfg(&local_nodeid) == FALSE) {
	crm_err("Couldn't connect to Corosync's CFG service");
	crm_exit(ENOPROTOOPT);
	}

	cluster.destroy = mcp_cpg_destroy;
	cluster.cpg.cpg_deliver_fn = mcp_cpg_deliver;
	cluster.cpg.cpg_confchg_fn = mcp_cpg_membership;

	if(cluster_connect_cpg(&cluster) == FALSE) {
	crm_err("Couldn't connect to Corosync's CPG service");
	crm_exit(ENOPROTOOPT);
	}

	if (is_corosync_cluster()) {
	/* Keep the membership list up-to-date for crm_node to query */
	rc = cluster_connect_quorum(mcp_quorum_callback, mcp_quorum_destroy);
	}

	local_name = get_local_node_name();
	update_node_processes(local_nodeid, local_name, get_process_list());

	mainloop_add_signal(SIGTERM, pcmk_shutdown);
	mainloop_add_signal(SIGINT, pcmk_shutdown);

	find_and_track_existing_processes();
	init_children_processes();

	crm_info("Starting mainloop");

	g_main_run(mainloop);

	if (ipcs) {
	crm_trace("Closing IPC server");
	mainloop_del_ipc_server(ipcs);
	ipcs = NULL;
	}

	g_main_destroy(mainloop);

	cluster_disconnect_cpg(&cluster);
	cluster_disconnect_cfg();

	crm_info("Exiting %s", crm_system_name);

	crm_exit(pcmk_ok);
	}

File Metadata

Mime Type: text/x-c
Expires: Thu, Jun 26, 6:09 PM (1 d, 3 h)
Storage Engine: blob
Storage Format: Raw Data
Storage Handle: 1959352
Default Alt Text: pacemaker.c (30 KB)

pacemaker.cNo OneTemporaryActions

pacemaker.cView Options

File Metadata

Event Timeline

pacemaker.c
No OneTemporary
Actions

pacemaker.c
View Options