2 * Copyright (c) 2022 Cisco and/or its affiliates.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at:
7 * http://www.apache.org/licenses/LICENSE-2.0
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
15 #include <vnet/plugin/plugin.h>
16 #include <vpp/app/version.h>
18 #include <prom/prom.h>
19 #include <vpp-api/client/stat_client.h>
20 #include <vpp/stats/stat_segment.h>
23 static prom_main_t prom_main;
39 dump_counter_vector_simple (stat_segment_data_t *res, u8 *s, u8 used_only)
44 for (k = 0; k < vec_len (res->simple_counter_vec); k++)
45 for (j = 0; j < vec_len (res->simple_counter_vec[k]); j++)
47 if (used_only && !res->simple_counter_vec[k][j])
51 s = format (s, "# TYPE %s counter\n", fix_spaces (res->name));
55 format (s, "%s{thread=\"%d\",interface=\"%d\"} %lld\n",
56 fix_spaces (res->name), k, j, res->simple_counter_vec[k][j]);
62 dump_counter_vector_combined (stat_segment_data_t *res, u8 *s, u8 used_only)
67 for (k = 0; k < vec_len (res->simple_counter_vec); k++)
68 for (j = 0; j < vec_len (res->combined_counter_vec[k]); j++)
70 if (used_only && !res->combined_counter_vec[k][j].packets)
74 s = format (s, "# TYPE %s_packets counter\n",
75 fix_spaces (res->name));
77 format (s, "# TYPE %s_bytes counter\n", fix_spaces (res->name));
80 s = format (s, "%s_packets{thread=\"%d\",interface=\"%d\"} %lld\n",
81 fix_spaces (res->name), k, j,
82 res->combined_counter_vec[k][j].packets);
83 s = format (s, "%s_bytes{thread=\"%d\",interface=\"%d\"} %lld\n",
84 fix_spaces (res->name), k, j,
85 res->combined_counter_vec[k][j].bytes);
92 dump_error_index (stat_segment_data_t *res, u8 *s, u8 used_only)
96 for (j = 0; j < vec_len (res->error_vector); j++)
98 if (used_only && !res->error_vector[j])
100 s = format (s, "# TYPE %s counter\n", fix_spaces (res->name));
101 s = format (s, "%s{thread=\"%d\"} %lld\n", fix_spaces (res->name), j,
102 res->error_vector[j]);
109 dump_scalar_index (stat_segment_data_t *res, u8 *s, u8 used_only)
111 if (used_only && !res->scalar_value)
114 s = format (s, "# TYPE %s counter\n", fix_spaces (res->name));
115 s = format (s, "%s %.2f\n", fix_spaces (res->name), res->scalar_value);
121 dump_name_vector (stat_segment_data_t *res, u8 *s, u8 used_only)
125 s = format (s, "# TYPE %s_info gauge\n", fix_spaces (res->name));
126 for (k = 0; k < vec_len (res->name_vector); k++)
127 s = format (s, "%s_info{index=\"%d\",name=\"%s\"} 1\n",
128 fix_spaces (res->name), k, res->name_vector[k]);
134 scrape_stats_segment (u8 *s, u8 **patterns, u8 used_only)
136 stat_segment_data_t *res;
137 static u32 *stats = 0;
140 stats = stat_segment_ls (patterns);
143 res = stat_segment_dump (stats);
145 { /* Memory layout has changed */
148 stats = stat_segment_ls (patterns);
152 for (i = 0; i < vec_len (res); i++)
156 case STAT_DIR_TYPE_COUNTER_VECTOR_SIMPLE:
157 s = dump_counter_vector_simple (&res[i], s, used_only);
160 case STAT_DIR_TYPE_COUNTER_VECTOR_COMBINED:
161 s = dump_counter_vector_combined (&res[i], s, used_only);
163 case STAT_DIR_TYPE_ERROR_INDEX:
164 s = dump_error_index (&res[i], s, used_only);
167 case STAT_DIR_TYPE_SCALAR_INDEX:
168 s = dump_scalar_index (&res[i], s, used_only);
171 case STAT_DIR_TYPE_NAME_VECTOR:
172 s = dump_name_vector (&res[i], s, used_only);
175 case STAT_DIR_TYPE_EMPTY:
179 clib_warning ("Unknown value %d\n", res[i].type);
183 stat_segment_data_free (res);
189 send_data_to_hss (hss_session_handle_t sh)
191 hss_url_handler_args_t args = {};
192 prom_main_t *pm = &prom_main;
195 args.data = vec_dup (pm->stats);
196 args.data_len = vec_len (pm->stats);
197 args.sc = HTTP_STATUS_OK;
198 args.free_vec_data = 1;
200 pm->send_data (&args);
204 send_data_to_hss_rpc (void *rpc_args)
206 send_data_to_hss (*(hss_session_handle_t *) rpc_args);
210 prom_scraper_process (vlib_main_t *vm, vlib_node_runtime_t *rt,
213 uword *event_data = 0, event_type;
214 prom_main_t *pm = &prom_main;
215 hss_session_handle_t sh;
216 f64 timeout = 10000.0;
220 vlib_process_wait_for_event_or_clock (vm, timeout);
221 event_type = vlib_process_get_events (vm, (uword **) &event_data);
225 /* timeout, do nothing */
227 case PROM_SCRAPER_EVT_RUN:
228 sh.as_u64 = event_data[0];
229 vec_reset_length (pm->stats);
230 pm->stats = scrape_stats_segment (pm->stats, pm->stats_patterns,
232 session_send_rpc_evt_to_thread_force (sh.thread_index,
233 send_data_to_hss_rpc, &sh);
234 pm->last_scrape = vlib_time_now (vm);
237 clib_warning ("unexpected event %u", event_type);
241 vec_reset_length (event_data);
246 VLIB_REGISTER_NODE (prom_scraper_process_node) = {
247 .function = prom_scraper_process,
248 .type = VLIB_NODE_TYPE_PROCESS,
249 .name = "prom-scraper-process",
250 .state = VLIB_NODE_STATE_DISABLED,
254 prom_scraper_process_enable (vlib_main_t *vm)
256 prom_main_t *pm = &prom_main;
259 vlib_node_set_state (vm, prom_scraper_process_node.index,
260 VLIB_NODE_STATE_POLLING);
261 n = vlib_get_node (vm, prom_scraper_process_node.index);
262 vlib_start_process (vm, n->runtime_index);
264 pm->scraper_node_index = n->index;
268 signal_run_to_scraper (uword *args)
270 prom_main_t *pm = &prom_main;
271 ASSERT (vlib_get_thread_index () == 0);
272 vlib_process_signal_event (pm->vm, pm->scraper_node_index,
273 PROM_SCRAPER_EVT_RUN, *args);
277 prom_stats_dump (hss_url_handler_args_t *args)
279 vlib_main_t *vm = vlib_get_main ();
280 f64 now = vlib_time_now (vm);
281 prom_main_t *pm = &prom_main;
283 /* If we've recently scraped stats, return data */
284 if ((now - pm->last_scrape) < pm->min_scrape_interval)
286 send_data_to_hss (args->sh);
287 return HSS_URL_HANDLER_ASYNC;
290 if (vm->thread_index != 0)
291 vl_api_rpc_call_main_thread (signal_run_to_scraper, (u8 *) &args->sh,
294 signal_run_to_scraper (&args->sh.as_u64);
296 return HSS_URL_HANDLER_ASYNC;
300 prom_stat_patterns_add (u8 **patterns)
302 prom_main_t *pm = &prom_main;
304 u8 **pattern, **existing;
308 vec_foreach (pattern, patterns)
311 len = vec_len (*pattern);
312 vec_foreach (existing, pm->stats_patterns)
314 if (vec_len (*existing) != len)
316 if (!memcmp (*existing, *pattern, len - 1))
323 vec_add1 (pm->stats_patterns, *pattern);
328 prom_stat_patterns_free (void)
330 prom_main_t *pm = &prom_main;
333 vec_foreach (pattern, pm->stats_patterns)
335 vec_free (pm->stats_patterns);
339 prom_stat_patterns_set (u8 **patterns)
341 prom_stat_patterns_free ();
342 prom_stat_patterns_add (patterns);
346 prom_stat_patterns_get (void)
348 return prom_main.stats_patterns;
352 prom_stat_segment_client_init (void)
354 stat_client_main_t *scm = &stat_client_main;
355 stat_segment_main_t *sm = &stat_segment_main;
358 size = sm->memory_size ? sm->memory_size : STAT_SEGMENT_DEFAULT_SIZE;
359 scm->memory_size = size;
360 scm->shared_header = sm->shared_header;
361 scm->directory_vector =
362 stat_segment_adjust (scm, (void *) scm->shared_header->directory_vector);
366 prom_enable (vlib_main_t *vm)
368 prom_main_t *pm = &prom_main;
370 pm->register_url = vlib_get_plugin_symbol ("http_static_plugin.so",
371 "hss_register_url_handler");
373 vlib_get_plugin_symbol ("http_static_plugin.so", "hss_session_send_data");
374 pm->register_url (prom_stats_dump, "stats.prom", HTTP_REQ_GET);
379 prom_scraper_process_enable (vm);
380 prom_stat_segment_client_init ();
383 static clib_error_t *
384 prom_init (vlib_main_t *vm)
386 prom_main_t *pm = &prom_main;
389 pm->min_scrape_interval = 1;
401 VLIB_INIT_FUNCTION (prom_init) = {
402 .runs_after = VLIB_INITS ("hss_main_init"),
405 VLIB_PLUGIN_REGISTER () = {
406 .version = VPP_BUILD_VER,
407 .description = "Prometheus Stats Exporter",
408 .default_disabled = 0,
412 * fd.io coding-style-patch-verification: ON
415 * eval: (c-set-style "gnu")