2 *------------------------------------------------------------------
5 * Copyright (c) 2018 Cisco and/or its affiliates.
6 * Licensed under the Apache License, Version 2.0 (the "License");
7 * you may not use this file except in compliance with the License.
8 * You may obtain a copy of the License at:
10 * http://www.apache.org/licenses/LICENSE-2.0
12 * Unless required by applicable law or agreed to in writing, software
13 * distributed under the License is distributed on an "AS IS" BASIS,
14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15 * See the License for the specific language governing permissions and
16 * limitations under the License.
17 *------------------------------------------------------------------
20 #include <arpa/inet.h>
21 #include <sys/epoll.h>
30 #include <sys/socket.h>
31 #include <vpp-api/client/stat_client.h>
32 #include <vlib/vlib.h>
33 #include <vpp/stats/stats.h>
36 /* https://github.com/prometheus/prometheus/wiki/Default-port-allocations */
37 #define SERVER_PORT 9477
53 dump_metrics (FILE * stream, stat_segment_cached_pointer_t * cp)
55 stat_segment_data_t *res;
58 res = stat_segment_collect (cp);
59 for (i = 0; i < vec_len (res); i++)
63 case STAT_DIR_TYPE_COUNTER_VECTOR_SIMPLE:
64 fformat (stream, "# TYPE %s counter\n", prom_string (res[i].name));
65 for (k = 0; k < vec_len (res[i].simple_counter_vec); k++)
66 for (j = 0; j < vec_len (res[i].simple_counter_vec[k]); j++)
67 fformat (stream, "%s{thread=\"%d\",interface=\"%d\"} %lld\n",
68 prom_string (res[i].name), k, j,
69 res[i].simple_counter_vec[k][j]);
72 case STAT_DIR_TYPE_COUNTER_VECTOR_COMBINED:
73 fformat (stream, "# TYPE %s_packets counter\n",
74 prom_string (res[i].name));
75 fformat (stream, "# TYPE %s_bytes counter\n",
76 prom_string (res[i].name));
77 for (k = 0; k < vec_len (res[i].simple_counter_vec); k++)
78 for (j = 0; j < vec_len (res[i].combined_counter_vec[k]); j++)
81 "%s_packets{thread=\"%d\",interface=\"%d\"} %lld\n",
82 prom_string (res[i].name), k, j,
83 res[i].combined_counter_vec[k][j].packets);
85 "%s_bytes{thread=\"%d\",interface=\"%d\"} %lld\n",
86 prom_string (res[i].name), k, j,
87 res[i].combined_counter_vec[k][j].bytes);
90 case STAT_DIR_TYPE_ERROR_INDEX:
91 fformat (stream, "# TYPE %s counter\n", prom_string (res[i].name));
92 fformat (stream, "%s{thread=\"0\"} %lld\n",
93 prom_string (res[i].name), res[i].error_value);
96 case STAT_DIR_TYPE_SCALAR_POINTER:
97 fformat (stream, "# TYPE %s counter\n", prom_string (res[i].name));
98 fformat (stream, "%s %.2f\n", prom_string (res[i].name),
103 fformat (stderr, "Unknown value %d\n", res[i].type);
107 stat_segment_data_free (res);
112 #define ROOTPAGE "<html><head><title>Metrics exporter</title></head><body><ul><li><a href=\"/metrics\">metrics</a></li></ul></body></html>"
113 #define NOT_FOUND_ERROR "<html><head><title>Document not found</title></head><body><h1>404 - Document not found</h1></body></html>"
116 http_handler (FILE * stream, stat_segment_cached_pointer_t * cp)
118 char status[80] = { 0 };
119 if (fgets (status, sizeof (status) - 1, stream) == 0)
121 fprintf (stderr, "fgets error: %s %s\n", status, strerror (errno));
125 char *method = strtok_r (status, " \t\r\n", &saveptr);
126 if (method == 0 || strncmp (method, "GET", 4) != 0)
128 fputs ("HTTP/1.0 405 Method Not Allowed\r\n", stream);
131 char *request_uri = strtok_r (NULL, " \t", &saveptr);
132 char *protocol = strtok_r (NULL, " \t\r\n", &saveptr);
133 if (protocol == 0 || strncmp (protocol, "HTTP/1.", 7) != 0)
135 fputs ("HTTP/1.0 400 Bad Request\r\n", stream);
138 /* Read the other headers */
142 if (fgets (header, sizeof (header) - 1, stream) == 0)
144 fprintf (stderr, "fgets error: %s\n", strerror (errno));
147 if (header[0] == '\n' || header[1] == '\n')
152 if (strcmp (request_uri, "/") == 0)
154 fprintf (stream, "HTTP/1.0 200 OK\r\nContent-Length: %lu\r\n\r\n",
155 (unsigned long) strlen (ROOTPAGE));
156 fputs (ROOTPAGE, stream);
159 if (strcmp (request_uri, "/metrics") != 0)
162 "HTTP/1.0 404 Not Found\r\nContent-Length: %lu\r\n\r\n",
163 (unsigned long) strlen (NOT_FOUND_ERROR));
164 fputs (NOT_FOUND_ERROR, stream);
167 fputs ("HTTP/1.0 200 OK\r\nContent-Type: text/plain\r\n\r\n", stream);
168 dump_metrics (stream, cp);
172 start_listen (u16 port)
174 struct sockaddr_in6 serveraddr;
175 int addrlen = sizeof (serveraddr);
178 int listenfd = socket (AF_INET6, SOCK_STREAM, 0);
181 perror ("Failed opening socket");
185 setsockopt (listenfd, SOL_SOCKET, SO_REUSEADDR, &enable, sizeof (int));
188 perror ("Failed setsockopt");
191 memset (&serveraddr, 0, sizeof (serveraddr));
192 serveraddr.sin6_family = AF_INET6;
193 serveraddr.sin6_port = htons (port);
194 serveraddr.sin6_addr = in6addr_any;
196 if (bind (listenfd, (struct sockaddr *) &serveraddr, addrlen) < 0)
198 fprintf (stderr, "bind() error %s\n", strerror (errno));
201 if (listen (listenfd, 1000000) != 0)
203 fprintf (stderr, "listen() error for %s\n", strerror (errno));
209 /* Socket epoll, linux-specific */
212 struct sockaddr_storage storage;
213 struct sockaddr addr;
214 struct sockaddr_in sin_addr;
215 struct sockaddr_in6 sin6_addr;
221 main (int argc, char **argv)
223 unformat_input_t _argv, *a = &_argv;
224 u8 *stat_segment_name, *pattern = 0, **patterns = 0;
227 clib_mem_init (0, 128 << 20);
229 unformat_init_command_line (a, argv);
231 stat_segment_name = (u8 *) STAT_SEGMENT_SOCKET_FILE;
233 while (unformat_check_input (a) != UNFORMAT_END_OF_INPUT)
235 if (unformat (a, "socket-name %s", &stat_segment_name))
237 else if (unformat (a, "%s", &pattern))
239 vec_add1 (patterns, pattern);
244 "%s: usage [socket-name <name>] <patterns> ...\n",
250 rv = stat_segment_connect ((char *) stat_segment_name);
253 fformat (stderr, "Couldn't connect to vpp, does %s exist?\n",
259 stat_segment_cached_pointer_t *cp;
261 dir = stat_segment_ls (patterns);
262 cp = stat_segment_register (dir);
266 "Couldn't register required counters with stat segment\n");
270 int fd = start_listen (SERVER_PORT);
277 int conn_sock = accept (fd, NULL, NULL);
280 fprintf (stderr, "Accept failed: %s", strerror (errno));
285 struct sockaddr_in6 clientaddr;
286 char address[INET6_ADDRSTRLEN];
288 getpeername (conn_sock, (struct sockaddr *) &clientaddr, &addrlen);
290 (AF_INET6, &clientaddr.sin6_addr, address, sizeof (address)))
292 printf ("Client address is [%s]:%d\n", address,
293 ntohs (clientaddr.sin6_port));
297 FILE *stream = fdopen (conn_sock, "r+");
300 fprintf (stderr, "fdopen error: %s\n", strerror (errno));
304 /* Single reader at the moment */
305 http_handler (stream, cp);
309 stat_segment_disconnect ();
315 * fd.io coding-style-patch-verification: ON
318 * eval: (c-set-style "gnu")