Ejemplo n.º 1
0
RRDDIM *rrddim_add(RRDSET *st, const char *id, const char *name, long multiplier, long divisor, int algorithm)
{
	char filename[FILENAME_MAX + 1];
	char fullfilename[FILENAME_MAX + 1];

	char varname[CONFIG_MAX_NAME + 1];
	RRDDIM *rd = NULL;
	unsigned long size = sizeof(RRDDIM) + (st->entries * sizeof(storage_number));

	debug(D_RRD_CALLS, "Adding dimension '%s/%s'.", st->id, id);

	rrdset_strncpyz_name(filename, id, FILENAME_MAX);
	snprintfz(fullfilename, FILENAME_MAX, "%s/%s.db", st->cache_dir, filename);
	if(rrd_memory_mode != RRD_MEMORY_MODE_RAM) rd = (RRDDIM *)mymmap(fullfilename, size, ((rrd_memory_mode == RRD_MEMORY_MODE_MAP)?MAP_SHARED:MAP_PRIVATE), 1);
	if(rd) {
		struct timeval now;
		gettimeofday(&now, NULL);

		if(strcmp(rd->magic, RRDDIMENSION_MAGIC) != 0) {
			errno = 0;
			info("Initializing file %s.", fullfilename);
			bzero(rd, size);
		}
		else if(rd->memsize != size) {
			errno = 0;
			error("File %s does not have the desired size. Clearing it.", fullfilename);
			bzero(rd, size);
		}
		else if(rd->multiplier != multiplier) {
			errno = 0;
			error("File %s does not have the same multiplier. Clearing it.", fullfilename);
			bzero(rd, size);
		}
		else if(rd->divisor != divisor) {
			errno = 0;
			error("File %s does not have the same divisor. Clearing it.", fullfilename);
			bzero(rd, size);
		}
		else if(rd->algorithm != algorithm) {
			errno = 0;
			error("File %s does not have the same algorithm. Clearing it.", fullfilename);
			bzero(rd, size);
		}
		else if(rd->update_every != st->update_every) {
			errno = 0;
			error("File %s does not have the same refresh frequency. Clearing it.", fullfilename);
			bzero(rd, size);
		}
		else if(usecdiff(&now, &rd->last_collected_time) > (rd->entries * rd->update_every * 1000000ULL)) {
			errno = 0;
			error("File %s is too old. Clearing it.", fullfilename);
			bzero(rd, size);
		}
		else if(strcmp(rd->id, id) != 0) {
			errno = 0;
			error("File %s contents are not for dimension %s. Clearing it.", fullfilename, id);
			// munmap(rd, size);
			// rd = NULL;
			bzero(rd, size);
		}
	}

	if(rd) {
		// we have a file mapped for rd
		rd->mapped = rrd_memory_mode;
		rd->flags = 0x00000000;
		rd->next = NULL;
		rd->name = NULL;
	}
	else {
		// if we didn't manage to get a mmap'd dimension, just create one

		rd = calloc(1, size);
		if(!rd) {
			fatal("Cannot allocate RRD_DIMENSION %s/%s.", st->id, id);
			return NULL;
		}

		rd->mapped = RRD_MEMORY_MODE_RAM;
	}
	rd->memsize = size;

	strcpy(rd->magic, RRDDIMENSION_MAGIC);
	strcpy(rd->cache_filename, fullfilename);
	strncpyz(rd->id, id, RRD_ID_LENGTH_MAX);
	rd->hash = simple_hash(rd->id);

	snprintfz(varname, CONFIG_MAX_NAME, "dim %s name", rd->id);
	rd->name = config_get(st->id, varname, (name && *name)?name:rd->id);

	snprintfz(varname, CONFIG_MAX_NAME, "dim %s algorithm", rd->id);
	rd->algorithm = rrddim_algorithm_id(config_get(st->id, varname, rrddim_algorithm_name(algorithm)));

	snprintfz(varname, CONFIG_MAX_NAME, "dim %s multiplier", rd->id);
	rd->multiplier = config_get_number(st->id, varname, multiplier);

	snprintfz(varname, CONFIG_MAX_NAME, "dim %s divisor", rd->id);
	rd->divisor = config_get_number(st->id, varname, divisor);
	if(!rd->divisor) rd->divisor = 1;

	rd->entries = st->entries;
	rd->update_every = st->update_every;

	// prevent incremental calculation spikes
	rd->counter = 0;
	rd->updated = 0;
	rd->calculated_value = 0;
	rd->last_calculated_value = 0;
	rd->collected_value = 0;
	rd->last_collected_value = 0;
	rd->collected_volume = 0;
	rd->stored_volume = 0;
	rd->values[st->current_entry] = pack_storage_number(0, SN_NOT_EXISTS);
	rd->last_collected_time.tv_sec = 0;
	rd->last_collected_time.tv_usec = 0;

	// append this dimension
	pthread_rwlock_wrlock(&st->rwlock);
	if(!st->dimensions)
		st->dimensions = rd;
	else {
		RRDDIM *td = st->dimensions;
		for(; td->next; td = td->next) ;
		td->next = rd;
	}
	pthread_rwlock_unlock(&st->rwlock);

	rrddim_index_add(st, rd);

	return(rd);
}
Ejemplo n.º 2
0
void *pluginsd_worker_thread(void *arg)
{
	struct plugind *cd = (struct plugind *)arg;
	char line[PLUGINSD_LINE_MAX + 1];

#ifdef DETACH_PLUGINS_FROM_NETDATA
	unsigned long long usec = 0, susec = 0;
	struct timeval last = {0, 0} , now = {0, 0};
#endif

	char *words[MAX_WORDS] = { NULL };
	uint32_t SET_HASH = simple_hash("SET");
	uint32_t BEGIN_HASH = simple_hash("BEGIN");
	uint32_t END_HASH = simple_hash("END");
	uint32_t FLUSH_HASH = simple_hash("FLUSH");
	uint32_t CHART_HASH = simple_hash("CHART");
	uint32_t DIMENSION_HASH = simple_hash("DIMENSION");
	uint32_t DISABLE_HASH = simple_hash("DISABLE");
#ifdef DETACH_PLUGINS_FROM_NETDATA
	uint32_t MYPID_HASH = simple_hash("MYPID");
	uint32_t STOPPING_WAKE_ME_UP_PLEASE_HASH = simple_hash("STOPPING_WAKE_ME_UP_PLEASE");
#endif

	while(likely(1)) {
		if(unlikely(netdata_exit)) break;

		FILE *fp = mypopen(cd->cmd, &cd->pid);
		if(unlikely(!fp)) {
			error("Cannot popen(\"%s\", \"r\").", cd->cmd);
			break;
		}

		info("PLUGINSD: '%s' running on pid %d", cd->fullfilename, cd->pid);

		RRDSET *st = NULL;
		unsigned long long count = 0;
		char *s;
		uint32_t hash;

		while(likely(fgets(line, PLUGINSD_LINE_MAX, fp) != NULL)) {
			if(unlikely(netdata_exit)) break;

			line[PLUGINSD_LINE_MAX] = '\0';

			// debug(D_PLUGINSD, "PLUGINSD: %s: %s", cd->filename, line);

			int w = pluginsd_split_words(line, words, MAX_WORDS);
			s = words[0];
			if(unlikely(!s || !*s || !w)) {
				// debug(D_PLUGINSD, "PLUGINSD: empty line");
				continue;
			}

			// debug(D_PLUGINSD, "PLUGINSD: words 0='%s' 1='%s' 2='%s' 3='%s' 4='%s' 5='%s' 6='%s' 7='%s' 8='%s' 9='%s'", words[0], words[1], words[2], words[3], words[4], words[5], words[6], words[7], words[8], words[9]);

			hash = simple_hash(s);

			if(likely(hash == SET_HASH && !strcmp(s, "SET"))) {
				char *dimension = words[1];
				char *value = words[2];

				if(unlikely(!dimension || !*dimension)) {
					error("PLUGINSD: '%s' is requesting a SET on chart '%s', without a dimension. Disabling it.", cd->fullfilename, st->id);
					cd->enabled = 0;
					killpid(cd->pid, SIGTERM);
					break;
				}

				if(unlikely(!value || !*value)) value = NULL;

				if(unlikely(!st)) {
					error("PLUGINSD: '%s' is requesting a SET on dimension %s with value %s, without a BEGIN. Disabling it.", cd->fullfilename, dimension, value?value:"<nothing>");
					cd->enabled = 0;
					killpid(cd->pid, SIGTERM);
					break;
				}

				if(unlikely(st->debug)) debug(D_PLUGINSD, "PLUGINSD: '%s' is setting dimension %s/%s to %s", cd->fullfilename, st->id, dimension, value?value:"<nothing>");

				if(value) rrddim_set(st, dimension, atoll(value));

				count++;
			}
			else if(likely(hash == BEGIN_HASH && !strcmp(s, "BEGIN"))) {
				char *id = words[1];
				char *microseconds_txt = words[2];

				if(unlikely(!id)) {
					error("PLUGINSD: '%s' is requesting a BEGIN without a chart id. Disabling it.", cd->fullfilename);
					cd->enabled = 0;
					killpid(cd->pid, SIGTERM);
					break;
				}

				st = rrdset_find(id);
				if(unlikely(!st)) {
					error("PLUGINSD: '%s' is requesting a BEGIN on chart '%s', which does not exist. Disabling it.", cd->fullfilename, id);
					cd->enabled = 0;
					killpid(cd->pid, SIGTERM);
					break;
				}

				if(likely(st->counter_done)) {
					unsigned long long microseconds = 0;
					if(microseconds_txt && *microseconds_txt) microseconds = strtoull(microseconds_txt, NULL, 10);
					if(microseconds) rrdset_next_usec(st, microseconds);
					else rrdset_next_plugins(st);
				}
			}
			else if(likely(hash == END_HASH && !strcmp(s, "END"))) {
				if(unlikely(!st)) {
					error("PLUGINSD: '%s' is requesting an END, without a BEGIN. Disabling it.", cd->fullfilename);
					cd->enabled = 0;
					killpid(cd->pid, SIGTERM);
					break;
				}

				if(unlikely(st->debug)) debug(D_PLUGINSD, "PLUGINSD: '%s' is requesting a END on chart %s", cd->fullfilename, st->id);

				rrdset_done(st);
				st = NULL;
			}
			else if(likely(hash == FLUSH_HASH && !strcmp(s, "FLUSH"))) {
				debug(D_PLUGINSD, "PLUGINSD: '%s' is requesting a FLUSH", cd->fullfilename);
				st = NULL;
			}
			else if(likely(hash == CHART_HASH && !strcmp(s, "CHART"))) {
				st = NULL;

				char *type = words[1];
				char *id = NULL;
				if(likely(type)) {
					id = strchr(type, '.');
					if(likely(id)) { *id = '\0'; id++; }
				}
				char *name = words[2];
				char *title = words[3];
				char *units = words[4];
				char *family = words[5];
				char *category = words[6];
				char *chart = words[7];
				char *priority_s = words[8];
				char *update_every_s = words[9];

				if(unlikely(!type || !*type || !id || !*id)) {
					error("PLUGINSD: '%s' is requesting a CHART, without a type.id. Disabling it.", cd->fullfilename);
					cd->enabled = 0;
					killpid(cd->pid, SIGTERM);
					break;
				}

				int priority = 1000;
				if(likely(priority_s)) priority = atoi(priority_s);

				int update_every = cd->update_every;
				if(likely(update_every_s)) update_every = atoi(update_every_s);
				if(unlikely(!update_every)) update_every = cd->update_every;

				int chart_type = RRDSET_TYPE_LINE;
				if(unlikely(chart)) chart_type = rrdset_type_id(chart);

				if(unlikely(!name || !*name)) name = NULL;
				if(unlikely(!family || !*family)) family = id;
				if(unlikely(!category || !*category)) category = type;

				st = rrdset_find_bytype(type, id);
				if(unlikely(!st)) {
					debug(D_PLUGINSD, "PLUGINSD: Creating chart type='%s', id='%s', name='%s', family='%s', category='%s', chart='%s', priority=%d, update_every=%d"
						, type, id
						, name?name:""
						, family?family:""
						, category?category:""
						, rrdset_type_name(chart_type)
						, priority
						, update_every
						);

					st = rrdset_create(type, id, name, family, title, units, priority, update_every, chart_type);
					cd->update_every = update_every;

					if(unlikely(strcmp(category, "none") == 0)) st->isdetail = 1;
				}
				else debug(D_PLUGINSD, "PLUGINSD: Chart '%s' already exists. Not adding it again.", st->id);
			}
			else if(likely(hash == DIMENSION_HASH && !strcmp(s, "DIMENSION"))) {
				char *id = words[1];
				char *name = words[2];
				char *algorithm = words[3];
				char *multiplier_s = words[4];
				char *divisor_s = words[5];
				char *options = words[6];

				if(unlikely(!id || !*id)) {
					error("PLUGINSD: '%s' is requesting a DIMENSION, without an id. Disabling it.", cd->fullfilename);
					cd->enabled = 0;
					killpid(cd->pid, SIGTERM);
					break;
				}

				if(unlikely(!st)) {
					error("PLUGINSD: '%s' is requesting a DIMENSION, without a CHART. Disabling it.", cd->fullfilename);
					cd->enabled = 0;
					killpid(cd->pid, SIGTERM);
					break;
				}

				long multiplier = 1;
				if(multiplier_s && *multiplier_s) multiplier = atol(multiplier_s);
				if(unlikely(!multiplier)) multiplier = 1;

				long divisor = 1;
				if(likely(divisor_s && *divisor_s)) divisor = atol(divisor_s);
				if(unlikely(!divisor)) divisor = 1;

				if(unlikely(!algorithm || !*algorithm)) algorithm = "absolute";

				if(unlikely(st->debug)) debug(D_PLUGINSD, "PLUGINSD: Creating dimension in chart %s, id='%s', name='%s', algorithm='%s', multiplier=%ld, divisor=%ld, hidden='%s'"
					, st->id
					, id
					, name?name:""
					, rrddim_algorithm_name(rrddim_algorithm_id(algorithm))
					, multiplier
					, divisor
					, options?options:""
					);

				RRDDIM *rd = rrddim_find(st, id);
				if(unlikely(!rd)) {
					rd = rrddim_add(st, id, name, multiplier, divisor, rrddim_algorithm_id(algorithm));
					rd->flags = 0x00000000;
					if(options && *options) {
						if(strstr(options, "hidden") != NULL) rd->flags |= RRDDIM_FLAG_HIDDEN;
						if(strstr(options, "noreset") != NULL) rd->flags |= RRDDIM_FLAG_DONT_DETECT_RESETS_OR_OVERFLOWS;
						if(strstr(options, "nooverflow") != NULL) rd->flags |= RRDDIM_FLAG_DONT_DETECT_RESETS_OR_OVERFLOWS;
					}
				}
				else if(unlikely(st->debug)) debug(D_PLUGINSD, "PLUGINSD: dimension %s/%s already exists. Not adding it again.", st->id, id);
			}
			else if(unlikely(hash == DISABLE_HASH && !strcmp(s, "DISABLE"))) {
				error("PLUGINSD: '%s' called DISABLE. Disabling it.", cd->fullfilename);
				cd->enabled = 0;
				killpid(cd->pid, SIGTERM);
				break;
			}
#ifdef DETACH_PLUGINS_FROM_NETDATA
			else if(likely(hash == MYPID_HASH && !strcmp(s, "MYPID"))) {
				char *pid_s = words[1];
				pid_t pid = atol(pid_s);

				if(likely(pid)) cd->pid = pid;
				debug(D_PLUGINSD, "PLUGINSD: %s is on pid %d", cd->id, cd->pid);
			}
			else if(likely(hash == STOPPING_WAKE_ME_UP_PLEASE_HASH && !strcmp(s, "STOPPING_WAKE_ME_UP_PLEASE"))) {
				error("PLUGINSD: '%s' (pid %d) called STOPPING_WAKE_ME_UP_PLEASE.", cd->fullfilename, cd->pid);

				gettimeofday(&now, NULL);
				if(unlikely(!usec && !susec)) {
					// our first run
					susec = cd->rrd_update_every * 1000000ULL;
				}
				else {
					// second+ run
					usec = usecdiff(&now, &last) - susec;
					error("PLUGINSD: %s last loop took %llu usec (worked for %llu, sleeped for %llu).\n", cd->fullfilename, usec + susec, usec, susec);
					if(unlikely(usec < (rrd_update_every * 1000000ULL / 2ULL))) susec = (rrd_update_every * 1000000ULL) - usec;
					else susec = rrd_update_every * 1000000ULL / 2ULL;
				}

				error("PLUGINSD: %s sleeping for %llu. Will kill with SIGCONT pid %d to wake it up.\n", cd->fullfilename, susec, cd->pid);
				usleep(susec);
				killpid(cd->pid, SIGCONT);
				bcopy(&now, &last, sizeof(struct timeval));
				break;
			}
#endif
			else {
				error("PLUGINSD: '%s' is sending command '%s' which is not known by netdata. Disabling it.", cd->fullfilename, s);
				cd->enabled = 0;
				killpid(cd->pid, SIGTERM);
				break;
			}
		}

		info("PLUGINSD: '%s' on pid %d stopped.", cd->fullfilename, cd->pid);

		// fgets() failed or loop broke
		int code = mypclose(fp, cd->pid);
		if(code == 1 || code == 127) {
			// 1 = DISABLE
			// 127 = cannot even run it
			error("PLUGINSD: '%s' (pid %d) exited with code %d. Disabling it.", cd->fullfilename, cd->pid, code);
			cd->enabled = 0;
		}

		if(netdata_exit) {
			cd->pid = 0;
			cd->enabled = 0;
			cd->obsolete = 1;
			return NULL;
		}

		if(unlikely(!count && cd->enabled)) {
			error("PLUGINSD: '%s' (pid %d) does not generate usefull output. Waiting a bit before starting it again.", cd->fullfilename, cd->pid);
			sleep((unsigned int) (cd->update_every * 10));
		}

		cd->pid = 0;
		if(likely(cd->enabled)) sleep((unsigned int) cd->update_every);
		else break;
	}

	cd->obsolete = 1;
	return NULL;
}