diff options
Diffstat (limited to 'src/plugins_d.c')
| -rwxr-xr-x | src/plugins_d.c | 532 |
1 files changed, 532 insertions, 0 deletions
diff --git a/src/plugins_d.c b/src/plugins_d.c new file mode 100755 index 00000000..eb8f141b --- /dev/null +++ b/src/plugins_d.c @@ -0,0 +1,532 @@ +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif +#include <sys/types.h> +#include <dirent.h> +#include <pthread.h> +#include <string.h> +#include <stdio.h> +#include <stdlib.h> +#include <signal.h> + +#include "main.h" +#include "common.h" +#include "appconfig.h" +#include "log.h" +#include "rrd.h" +#include "popen.h" +#include "plugins_d.h" + +struct plugind *pluginsd_root = NULL; + +#define MAX_WORDS 20 + +static inline int pluginsd_space(char c) { + switch(c) { + case ' ': + case '\t': + case '\r': + case '\n': + case '=': + return 1; + + default: + return 0; + } +} + +static int pluginsd_split_words(char *str, char **words, int max_words) { + char *s = str, quote = 0; + int i = 0, j; + + // skip all white space + while(unlikely(pluginsd_space(*s))) s++; + + // check for quote + if(unlikely(*s == '\'' || *s == '"')) { + quote = *s; // remember the quote + s++; // skip the quote + } + + // store the first word + words[i++] = s; + + // while we have something + while(likely(*s)) { + // if it is escape + if(unlikely(*s == '\\' && s[1])) { + s += 2; + continue; + } + + // if it is quote + else if(unlikely(*s == quote)) { + quote = 0; + *s = ' '; + continue; + } + + // if it is a space + else if(unlikely(quote == 0 && pluginsd_space(*s))) { + + // terminate the word + *s++ = '\0'; + + // skip all white space + while(likely(pluginsd_space(*s))) s++; + + // check for quote + if(unlikely(*s == '\'' || *s == '"')) { + quote = *s; // remember the quote + s++; // skip the quote + } + + // if we reached the end, stop + if(unlikely(!*s)) break; + + // store the next word + if(likely(i < max_words)) words[i++] = s; + else break; + } + + // anything else + else s++; + } + + // terminate the words + j = i; + while(likely(j < max_words)) words[j++] = NULL; + + return i; +} + + +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"))) { + int noname = 0; + st = NULL; + + if((words[1]) != NULL && (words[2]) != NULL && strcmp(words[1], words[2]) == 0) + noname = 1; + + 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 *context = 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(noname || !name || !*name || strcasecmp(name, "NULL") == 0 || strcasecmp(name, "(NULL)") == 0)) name = NULL; + if(unlikely(!family || !*family)) family = NULL; + if(unlikely(!context || !*context)) context = NULL; + + st = rrdset_find_bytype(type, id); + if(unlikely(!st)) { + debug(D_PLUGINSD, "PLUGINSD: Creating chart type='%s', id='%s', name='%s', family='%s', context='%s', chart='%s', priority=%d, update_every=%d" + , type, id + , name?name:"" + , family?family:"" + , context?context:"" + , rrdset_type_name(chart_type) + , priority + , update_every + ); + + st = rrdset_create(type, id, name, family, context, title, units, priority, update_every, chart_type); + cd->update_every = update_every; + } + 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; + pthread_exit(NULL); + 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; + pthread_exit(NULL); + return NULL; +} + +void *pluginsd_main(void *ptr) +{ + if(ptr) { ; } + + info("PLUGINS.D thread created with task id %d", gettid()); + + if(pthread_setcanceltype(PTHREAD_CANCEL_DEFERRED, NULL) != 0) + error("Cannot set pthread cancel type to DEFERRED."); + + if(pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, NULL) != 0) + error("Cannot set pthread cancel state to ENABLE."); + + char *dir_name = config_get("plugins", "plugins directory", PLUGINS_DIR); + int automatic_run = config_get_boolean("plugins", "enable running new plugins", 1); + int scan_frequency = (int) config_get_number("plugins", "check for new plugins every", 60); + DIR *dir = NULL; + struct dirent *file = NULL; + struct plugind *cd; + + // enable the apps plugin by default + // config_get_boolean("plugins", "apps", 1); + + if(scan_frequency < 1) scan_frequency = 1; + + while(likely(1)) { + if(unlikely(netdata_exit)) break; + + dir = opendir(dir_name); + if(unlikely(!dir)) { + error("Cannot open directory '%s'.", dir_name); + pthread_exit(NULL); + return NULL; + } + + while(likely((file = readdir(dir)))) { + if(unlikely(netdata_exit)) break; + + debug(D_PLUGINSD, "PLUGINSD: Examining file '%s'", file->d_name); + + if(unlikely(strcmp(file->d_name, ".") == 0 || strcmp(file->d_name, "..") == 0)) continue; + + int len = (int) strlen(file->d_name); + if(unlikely(len <= (int)PLUGINSD_FILE_SUFFIX_LEN)) continue; + if(unlikely(strcmp(PLUGINSD_FILE_SUFFIX, &file->d_name[len - (int)PLUGINSD_FILE_SUFFIX_LEN]) != 0)) { + debug(D_PLUGINSD, "PLUGINSD: File '%s' does not end in '%s'.", file->d_name, PLUGINSD_FILE_SUFFIX); + continue; + } + + char pluginname[CONFIG_MAX_NAME + 1]; + snprintf(pluginname, CONFIG_MAX_NAME, "%.*s", (int)(len - PLUGINSD_FILE_SUFFIX_LEN), file->d_name); + int enabled = config_get_boolean("plugins", pluginname, automatic_run); + + if(unlikely(!enabled)) { + debug(D_PLUGINSD, "PLUGINSD: plugin '%s' is not enabled", file->d_name); + continue; + } + + // check if it runs already + for(cd = pluginsd_root ; likely(cd) ; cd = cd->next) { + if(unlikely(strcmp(cd->filename, file->d_name) == 0)) break; + } + if(likely(cd && !cd->obsolete)) { + debug(D_PLUGINSD, "PLUGINSD: plugin '%s' is already running", cd->filename); + continue; + } + + // it is not running + // allocate a new one, or use the obsolete one + if(unlikely(!cd)) { + cd = calloc(sizeof(struct plugind), 1); + if(unlikely(!cd)) fatal("Cannot allocate memory for plugin."); + + snprintf(cd->id, CONFIG_MAX_NAME, "plugin:%s", pluginname); + + strncpy(cd->filename, file->d_name, FILENAME_MAX); + snprintf(cd->fullfilename, FILENAME_MAX, "%s/%s", dir_name, cd->filename); + + cd->enabled = enabled; + cd->update_every = (int) config_get_number(cd->id, "update every", rrd_update_every); + cd->started_t = time(NULL); + + char *def = ""; + snprintf(cd->cmd, PLUGINSD_CMD_MAX, "exec %s %d %s", cd->fullfilename, cd->update_every, config_get(cd->id, "command options", def)); + + // link it + if(likely(pluginsd_root)) cd->next = pluginsd_root; + pluginsd_root = cd; + } + cd->obsolete = 0; + + if(unlikely(!cd->enabled)) continue; + + // spawn a new thread for it + if(unlikely(pthread_create(&cd->thread, NULL, pluginsd_worker_thread, cd) != 0)) { + error("PLUGINSD: failed to create new thread for plugin '%s'.", cd->filename); + cd->obsolete = 1; + } + else if(unlikely(pthread_detach(cd->thread) != 0)) + error("PLUGINSD: Cannot request detach of newly created thread for plugin '%s'.", cd->filename); + } + + closedir(dir); + sleep((unsigned int) scan_frequency); + } + + pthread_exit(NULL); + return NULL; +} + + |